spring boot整合mybatis+mybatis-plus

Spring boot对于我来说是一个刚接触的新东西，学习过程中，发现这东西还是很容易上手的，Spring boot没配置时会默认使用Spring data jpa，这东西可以说一个极简洁的工具，可是我还是比较喜欢用mybatis,工具是没有最好的，只有这合适自己的。

说到mybatis，最近有一个很好用的工具--------mybatis-Plus（官网）,现在更新的版本是2.1.2，这里使用的也是这个版本。我比较喜欢的功能是代码生成器，条件构造器，这样就可以更容易的去开发了。

mybatisPlus官网上是有Spring boot整个的例子的，我也跟着它走了一篇，结果，程序没跑起来，后来才知道demo用的H2 database，和mysql根本不是同一样东西，所以各位想要整合mybatisPlus，可以不看官网的，可以少走弯路。

下面就是整合的过程

1、首先要把需要的jar文件都弄过来，pom.xml需要的东西如下

pom.xml(不完整)

<!-- mybatis-plus begin -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatisplus-spring-boot-starter</artifactId>
    <version>1.0.4</version>
</dependency>
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus</artifactId>
    <version>2.1.2</version>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<!-- mybatis-plus end -->

<!-- druid阿里巴巴数据库连接池 -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.3</version>
</dependency>

<!--mysql-->
<dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
   <scope>runtime</scope>
</dependency>

<dependency>
   <groupId>org.mybatis.spring.boot</groupId>
   <artifactId>mybatis-spring-boot-starter</artifactId>
   <version>1.3.1</version>
</dependency>

2、添加mybatis相关的配置，如账号、密码等。这里我使用了application.yml来配。

application.yml

server:
    port: 8080
spring
spring:

devtools:

restart:

enabled: true     #这里是为了热部署的，与mybatis是无关的
DATABASE CONFIG
datasource:

driver-class-name: com.mysql.jdbc.Driver

username: root

password: root

url: jdbc:mysql://mysqldb:3306/tdx_shop?useUnicode=true&characterEncoding=utf-8

    type: com.alibaba.druid.pool.DruidDataSource   #这里是配置druid连接池，以下都是druid的配置信息

filters: stat,wall,log4j

maxActive: 20

initialSize: 1

maxWait: 60000

minIdle: 1

timeBetweenEvictionRunsMillis: 60000

minEvictableIdleTimeMillis: 300000

validationQuery: select 'x'

testWhileIdle: true

testOnBorrow: false

testOnReturn: false

poolPreparedStatements: true

maxOpenPreparedStatements: 20

connection-properties: druid.stat.merggSql=ture;druid.stat.slowSqlMillis=5000
mybatis
mybatis:

mapper-locations: classpath:/mapper/**Mapper.xml   #把xml文件放在com.XX.mapper.中可能会出现找到的问题，这里把他放在resource下的mapper中
实体扫描，多个package用逗号或者分号分隔
typeAliasesPackage: com.tdx.account_service.entity  #这里是实体类的位置

configuration:

map-underscore-to-camel-case: true

cache-enabled: false
logging
logging:

level: warn

配置的东西和我们以前用mybatis配置可以说差不多，但spring boot是没有xml配置文件的。注意一下红字的内容，基本没问题了。

3、mybatis-Plus配置文件------MybatisPlusConfig，首先上图说明一下文件路径。其中MybatisPlusConfig是放在config文件夹内，而xml文件是放在resouces下mapper中。

接着就是MybatisPlusConfig内容部分了

1	`MybatisProperties.java`

package com.tdx.account_service.config;
import com.alibaba.druid.pool.DruidDataSource;

import com.alibaba.druid.support.http.StatViewServlet;

import com.alibaba.druid.support.http.WebStatFilter;

import com.baomidou.mybatisplus.MybatisConfiguration;

import com.baomidou.mybatisplus.MybatisXMLLanguageDriver;

import com.baomidou.mybatisplus.entity.GlobalConfiguration;

import com.baomidou.mybatisplus.enums.DBType;

import com.baomidou.mybatisplus.plugins.PaginationInterceptor;

import com.baomidou.mybatisplus.plugins.PerformanceInterceptor;

import com.baomidou.mybatisplus.plugins.parser.ISqlParser;

import com.baomidou.mybatisplus.plugins.parser.ISqlParserFilter;

import com.baomidou.mybatisplus.plugins.parser.tenant.TenantHandler;

import com.baomidou.mybatisplus.plugins.parser.tenant.TenantSqlParser;

import com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean;

import com.baomidou.mybatisplus.spring.boot.starter.SpringBootVFS;

import com.baomidou.mybatisplus.toolkit.PluginUtils;

import net.sf.jsqlparser.expression.Expression;

import net.sf.jsqlparser.expression.LongValue;

import org.apache.ibatis.mapping.DatabaseIdProvider;

import org.apache.ibatis.mapping.MappedStatement;

import org.apache.ibatis.plugin.Interceptor;

import org.apache.ibatis.reflection.MetaObject;

import org.mybatis.spring.annotation.MapperScan;

import org.mybatis.spring.boot.autoconfigure.MybatisProperties;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.boot.bind.RelaxedPropertyResolver;

import org.springframework.boot.context.properties.EnableConfigurationProperties;

import org.springframework.boot.web.servlet.FilterRegistrationBean;

import org.springframework.boot.web.servlet.ServletRegistrationBean;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.core.env.Environment;

import org.springframework.core.io.DefaultResourceLoader;

import org.springframework.core.io.ResourceLoader;

import org.springframework.util.ObjectUtils;

import org.springframework.util.StringUtils;
import javax.sql.DataSource;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.List;
/**


code is far away from bug with the animal protecting


┏┓　　　┏┓


┏┛┻━━━┛┻┓


┃　　　　　　　┃


┃　　　━　　　┃


┃　┳┛　┗┳　┃


┃　　　　　　　┃


┃　　　┻　　　┃


┃　　　　　　　┃


┗━┓　　　┏━┛


　　┃　　　┃神兽保佑


　　┃　　　┃代码无BUG！


　　┃　　　┗━━━┓


　　┃　　　　　　　┣┓


　　┃　　　　　　　┏┛


　　┗┓┓┏━┳┓┏┛


　　　┃┫┫　┃┫┫


　　　┗┻┛　┗┻┛




@Description : MybatisPlus配置





@Author : Liang.Guangqing


@Date : Create in 2017/9/19 13:54

*/

@Configuration

@EnableConfigurationProperties(MybatisProperties.class)

public class MybatisPlusConfig {
@Autowired

private Environment environment;

private RelaxedPropertyResolver propertyResolver;

@Autowired

private DataSource dataSource;

@Autowired

private MybatisProperties properties;

@Autowired

private ResourceLoader resourceLoader = new DefaultResourceLoader();

@Autowired(required = false)

private Interceptor[] interceptors;

@Autowired(required = false)

private DatabaseIdProvider databaseIdProvider;
/**

@Description : mybatis-plus SQL执行效率插件【生产环境可以关闭】



@Author : Liang.Guangqing
@Date : Create in 2017/9/19 13:57

*/

@Bean

public PerformanceInterceptor performanceInterceptor() {

return new PerformanceInterceptor();

}

/**


配置DataSource


@return


@throws SQLException

*/

@Bean

public DataSource druidDataSource() throws SQLException {

this.propertyResolver = new RelaxedPropertyResolver(environment, "spring.datasource.");
System.out.println("注入druid!");

DruidDataSource datasource = new DruidDataSource();

datasource.setUrl(propertyResolver.getProperty("url"));

datasource.setDriverClassName(propertyResolver.getProperty("driver-class-name"));

datasource.setUsername(propertyResolver.getProperty("username"));

datasource.setPassword(propertyResolver.getProperty("password"));

datasource.setInitialSize(Integer.valueOf(propertyResolver.getProperty("initial-size")));

datasource.setMinIdle(Integer.valueOf(propertyResolver.getProperty("min-idle")));

datasource.setMaxWait(Long.valueOf(propertyResolver.getProperty("max-wait")));

datasource.setMaxActive(Integer.valueOf(propertyResolver.getProperty("max-active")));

datasource.setMinEvictableIdleTimeMillis(Long.valueOf(propertyResolver.getProperty("min-evictable-idle-time-millis")));

try {

datasource.setFilters(propertyResolver.getProperty("filters"));

} catch (SQLException e) {

e.printStackTrace();

}

return datasource;

}


/**

@Description : mybatis-plus分页插件



@Author : Liang.Guangqing
@Date : Create in 2017/9/19 13:59

*/

@Bean

public PaginationInterceptor paginationInterceptor() {

PaginationInterceptor page = new PaginationInterceptor();

page.setDialectType("mysql");

return page;

}

/**

这里全部使用mybatis-autoconfigure 已经自动加载的资源。不手动指定
配置文件和mybatis-boot的配置文件同步
@return

*/

@Bean

public MybatisSqlSessionFactoryBean mybatisSqlSessionFactoryBean() {

MybatisSqlSessionFactoryBean mybatisPlus = new MybatisSqlSessionFactoryBean();

mybatisPlus.setDataSource(dataSource);

mybatisPlus.setVfs(SpringBootVFS.class);

if (StringUtils.hasText(this.properties.getConfigLocation())) {

mybatisPlus.setConfigLocation(this.resourceLoader.getResource(this.properties.getConfigLocation()));

}

mybatisPlus.setConfiguration(properties.getConfiguration());

if (!ObjectUtils.isEmpty(this.interceptors)) {

mybatisPlus.setPlugins(this.interceptors);

}

// MP 全局配置，更多内容进入类看注释

GlobalConfiguration globalConfig = new GlobalConfiguration();

globalConfig.setDbType(DBType.MYSQL.name());

// ID 策略 AUTO->0("数据库ID自增") INPUT->1(用户输入ID") ID_WORKER->2("全局唯一ID") UUID->3("全局唯一ID")

globalConfig.setIdType(2);

mybatisPlus.setGlobalConfig(globalConfig);

MybatisConfiguration mc = new MybatisConfiguration();

mc.setDefaultScriptingLanguage(MybatisXMLLanguageDriver.class);

mybatisPlus.setConfiguration(mc);

if (this.databaseIdProvider != null) {

mybatisPlus.setDatabaseIdProvider(this.databaseIdProvider);

}

if (StringUtils.hasLength(this.properties.getTypeAliasesPackage())) {

mybatisPlus.setTypeAliasesPackage(this.properties.getTypeAliasesPackage());

}

if (StringUtils.hasLength(this.properties.getTypeHandlersPackage())) {

mybatisPlus.setTypeHandlersPackage(this.properties.getTypeHandlersPackage());

}

if (!ObjectUtils.isEmpty(this.properties.resolveMapperLocations())) {

mybatisPlus.setMapperLocations(this.properties.resolveMapperLocations());

}

return mybatisPlus;

}

/**

注册一个StatViewServlet
@return

/

@Bean

public ServletRegistrationBean DruidStatViewServle(){

//org.springframework.boot.context.embedded.ServletRegistrationBean提供类的进行注册.

ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/");

//添加初始化参数：initParams

//白名单：

// servletRegistrationBean.addInitParameter("allow","127.0.0.1");

//IP黑名单 (存在共同时，deny优先于allow) : 如果满足deny的话提示:Sorry, you are not permitted to view this page.

// servletRegistrationBean.addInitParameter("deny","192.168.1.73");

//登录查看信息的账号密码.

servletRegistrationBean.addInitParameter("loginUsername","root");

servletRegistrationBean.addInitParameter("loginPassword","root");

//是否能够重置数据.

servletRegistrationBean.addInitParameter("resetEnable","false");

return servletRegistrationBean;

}

/**

注册一个：filterRegistrationBean

@return

/

@Bean

public FilterRegistrationBean druidStatFilter(){

FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());

//添加过滤规则.

filterRegistrationBean.addUrlPatterns("/");

//添加不需要忽略的格式信息.

filterRegistrationBean.addInitParameter("exclusions",".js,.gif,.jpg,.png,.css,.ico,/druid/*");

return filterRegistrationBean;

}



}

这里是完整的配置文件，需要注意的是引入的包，别引错了！

4、还要开启dao的扫描，很简单，就是在启动文件中添加@MapperScan("com.tdx.account_service.dao*")，如下是完整的

到这里，配置算是完成了，运行一下项目是可以运行起来的。

我觉得Mybatis-Plus最好玩得应该是代码生成器这部分内容，下面是代码生成器的使用过程

pom.xml上要加点东西

<dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity-engine-core</artifactId>
    <version>2.0</version>
</dependency>

1、代码生成器的配置文件

MybatisPlusConfig.java

/**
 * Copyright (c) 2011-2016, hubin (jobob@qq.com).
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.tdx.account_service.generator;
import java.io.File;

import java.util.ArrayList;

import java.util.Collections;

import java.util.HashMap;

import java.util.List;

import java.util.Map;
import com.baomidou.mybatisplus.enums.FieldFill;

import com.baomidou.mybatisplus.generator.AutoGenerator;

import com.baomidou.mybatisplus.generator.InjectionConfig;

import com.baomidou.mybatisplus.generator.config.DataSourceConfig;

import com.baomidou.mybatisplus.generator.config.FileOutConfig;

import com.baomidou.mybatisplus.generator.config.GlobalConfig;

import com.baomidou.mybatisplus.generator.config.PackageConfig;

import com.baomidou.mybatisplus.generator.config.StrategyConfig;

import com.baomidou.mybatisplus.generator.config.TemplateConfig;

import com.baomidou.mybatisplus.generator.config.converts.MySqlTypeConvert;

import com.baomidou.mybatisplus.generator.config.po.TableFill;

import com.baomidou.mybatisplus.generator.config.po.TableInfo;

import com.baomidou.mybatisplus.generator.config.rules.DbColumnType;

import com.baomidou.mybatisplus.generator.config.rules.DbType;

import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
/**

*code is far away from bug with the animal protecting

┏┓　　　┏┓

*┏┛┻━━━┛┻┓

*┃　　　　　　　┃ 　

*┃　　　━　　　┃

*┃　┳┛　┗┳　┃

*┃　　　　　　　┃

*┃　　　┻　　　┃

*┃　　　　　　　┃

*┗━┓　　　┏━┛

*　　┃　　　┃神兽保佑

*　　┃　　　┃代码无BUG！

*　　┃　　　┗━━━┓

*　　┃　　　　　　　┣┓

*　　┃　　　　　　　┏┛

*　　┗┓┓┏━┳┓┏┛

*　　　┃┫┫　┃┫┫

*　　　┗┻┛　┗┻┛

*　　
@Description : MybatisPlus代码生成器



@Author : Liang.Guangqing
@Date : Create in 2017/9/19 14:48　

*/

public class MysqlGenerator {

</span><span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> String packageName="account_service";    <span style="color: #008000">//</span><span style="color: #008000">文件路径</span>
<span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> String authorName="Liang.Guangqing";     <span style="color: #008000">//</span><span style="color: #008000">作者</span>
<span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> String table="sc_user";                  <span style="color: #008000">//</span><span style="color: #008000">table名字</span>
<span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> String prefix="sc_";                     <span style="color: #008000">//</span><span style="color: #008000">table前缀</span>
<span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> File file = <span style="color: #0000ff">new</span><span style="color: #000000"> File(packageName);
</span><span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> String path =<span style="color: #000000"> file.getAbsolutePath();

</span><span style="color: #0000ff">public</span> <span style="color: #0000ff">static</span> <span style="color: #0000ff">void</span><span style="color: #000000"> main(String[] args) {
    </span><span style="color: #008000">//</span><span style="color: #008000"> 自定义需要填充的字段</span>
    List&lt;TableFill&gt; tableFillList = <span style="color: #0000ff">new</span> ArrayList&lt;&gt;<span style="color: #000000">();
    tableFillList.add(</span><span style="color: #0000ff">new</span> TableFill("ASDD_SS"<span style="color: #000000">, FieldFill.INSERT_UPDATE));
    </span><span style="color: #008000">//</span><span style="color: #008000"> 代码生成器</span>
    AutoGenerator mpg = <span style="color: #0000ff">new</span><span style="color: #000000"> AutoGenerator().setGlobalConfig(
            </span><span style="color: #008000">//</span><span style="color: #008000"> 全局配置</span>
            <span style="color: #0000ff">new</span><span style="color: #000000"> GlobalConfig()
                    .setOutputDir(path</span>+"/src/main/java")<span style="color: #008000">//</span><span style="color: #008000">输出目录</span>
                    .setFileOverride(<span style="color: #0000ff">true</span>)<span style="color: #008000">//</span><span style="color: #008000"> 是否覆盖文件</span>
                    .setActiveRecord(<span style="color: #0000ff">true</span>)<span style="color: #008000">//</span><span style="color: #008000"> 开启 activeRecord 模式</span>
                    .setEnableCache(<span style="color: #0000ff">false</span>)<span style="color: #008000">//</span><span style="color: #008000"> XML 二级缓存</span>
                    .setBaseResultMap(<span style="color: #0000ff">true</span>)<span style="color: #008000">//</span><span style="color: #008000"> XML ResultMap</span>
                    .setBaseColumnList(<span style="color: #0000ff">true</span>)<span style="color: #008000">//</span><span style="color: #008000"> XML columList</span>
                    .setOpen(<span style="color: #0000ff">false</span>)<span style="color: #008000">//</span><span style="color: #008000">生成后打开文件夹</span>

                        .setAuthor(authorName)

// 自定义文件命名，注意 %s 会自动填充表实体属性！

.setMapperName("%sMapper")

.setXmlName("%sMapper")

.setServiceName("%sService")

.setServiceImplName("%sServiceImpl")

.setControllerName("%sController")

).setDataSource(

// 数据源配置

new DataSourceConfig()

.setDbType(DbType.MYSQL)// 数据库类型

.setTypeConvert(new MySqlTypeConvert() {

// 自定义数据库表字段类型转换【可选】

                            @Override

public DbColumnType processTypeConvert(String fieldType) {

System.out.println("转换类型：" + fieldType);

// if ( fieldType.toLowerCase().contains( "tinyint" ) ) {

//    return DbColumnType.BOOLEAN;

// }

return super.processTypeConvert(fieldType);

}

})

.setDriverName("com.mysql.jdbc.Driver")

.setUsername("root")

.setPassword("root")

.setUrl("jdbc:mysql://127.0.0.1:3306/tdx_shop?characterEncoding=utf8")

).setStrategy(

// 策略配置

new StrategyConfig()

// .setCapitalMode(true)// 全局大写命名

//.setDbColumnUnderline(true)//全局下划线命名

.setTablePrefix(new String[]{prefix})// 此处可以修改为您的表前缀

.setNaming(NamingStrategy.underline_to_camel)// 表名生成策略

.setInclude(new String[] { table }) // 需要生成的表

.setRestControllerStyle(true)

//.setExclude(new String[]{"test"}) // 排除生成的表

// 自定义实体父类

// .setSuperEntityClass("com.baomidou.demo.TestEntity")

// 自定义实体，公共字段

//.setSuperEntityColumns(new String[]{"test_id"})

                        .setTableFillList(tableFillList)

// 自定义 mapper 父类

// .setSuperMapperClass("com.baomidou.demo.TestMapper")

// 自定义 service 父类

// .setSuperServiceClass("com.baomidou.demo.TestService")

// 自定义 service 实现类父类

// .setSuperServiceImplClass("com.baomidou.demo.TestServiceImpl")

// 自定义 controller 父类

.setSuperControllerClass("com.tdx."+packageName+".controller.AbstractController")

// 【实体】是否生成字段常量（默认 false）

// public static final String ID = "test_id";

// .setEntityColumnConstant(true)

// 【实体】是否为构建者模型（默认 false）

// public User setName(String name) {this.name = name; return this;}

// .setEntityBuilderModel(true)

// 【实体】是否为lombok模型（默认 false）<a href="https://projectlombok.org/">document</a>

// .setEntityLombokModel(true)

// Boolean类型字段是否移除is前缀处理

// .setEntityBooleanColumnRemoveIsPrefix(true)

// .setRestControllerStyle(true)

// .setControllerMappingHyphenStyle(true)

        ).setPackageInfo(

// 包配置

new PackageConfig()

//.setModuleName("User")

.setParent("com.tdx."+packageName)// 自定义包路径

.setController("controller")// 这里是控制器包名，默认 web

.setEntity("entity")

.setMapper("dao")

.setService("service")

.setServiceImpl("service.impl")

//.setXml("mapper")

        ).setCfg(

// 注入自定义配置，可以在 VM 中使用 cfg.abc 设置的值

new InjectionConfig() {

@Override

public void initMap() {

Map<String, Object> map = new HashMap<>();

map.put("abc", this.getConfig().getGlobalConfig().getAuthor() + "-mp");

this.setMap(map);

}

}.setFileOutConfigList(Collections.<FileOutConfig>singletonList(new FileOutConfig("/templates/mapper.xml.vm") {

// 自定义输出文件目录

                    @Override

public String outputFile(TableInfo tableInfo) {

return path+"/src/main/resources/mapper/" + tableInfo.getEntityName() + "Mapper.xml";

}

}))

).setTemplate(

// 关闭默认 xml 生成，调整生成 至 根目录

new TemplateConfig().setXml(null)

// 自定义模板配置，模板可以参考源码 /mybatis-plus/src/main/resources/template 使用 copy

// 至您项目 src/main/resources/template 目录下，模板名称也可自定义如下配置：

// .setController("...");

// .setEntity("...");

// .setMapper("...");

// .setXml("...");

// .setService("...");

// .setServiceImpl("...");

        );
    </span><span style="color: #008000">//</span><span style="color: #008000"> 执行生成</span>

        mpg.execute();
    </span><span style="color: #008000">//</span><span style="color: #008000"> 打印注入设置，这里演示模板里面怎么获取注入内容【可无】</span>
    System.err.println(mpg.getCfg().getMap().get("abc"<span style="color: #000000">));
}

}

文件中修改的内容还是很多的，最主要的还是mysql的连接信息，没理由你账号，密码都错了还能连得上吧，其次设置一下你生成的模板文件路径，我这里生成的路径在上面图可以看得到，是在com.tdx.account_service下的，注意，xml文件要放在resources下，不然是识别的，说找不到这个方法

按照官网的代码模板生成的文件基本是白白的，主要是mybatis-Plus集成了公共方法，很多常用的工具都可以引用了。在这里我提供一下我修改后Controller.java.vm文件，主要还是按照我自己的习惯去弄的

controller.java.vm

package ${package.Controller};
import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;
if(${restControllerStyle})
import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RestController;
else
import org.springframework.stereotype.Controller;
end
if(${superControllerClassPackage})
import ${superControllerClassPackage};
end
import org.springframework.beans.factory.annotation.Autowired;

import com.baomidou.mybatisplus.mapper.EntityWrapper;

import com.baomidou.mybatisplus.plugins.Page;

import ${package.Service}.${table.serviceName};

import ${package.Entity}.common.DatatablesJSON;

import ${package.Entity}.common.JSONResult;

import ${package.Entity}.${entity};

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;
/**

*code is far away from bug with the animal protecting

┏┓　　　┏┓

*┏┛┻━━━┛┻┓

*┃　　　　　　　┃ 　

*┃　　　━　　　┃

*┃　┳┛　┗┳　┃

*┃　　　　　　　┃

*┃　　　┻　　　┃

*┃　　　　　　　┃

*┗━┓　　　┏━┛

*　　┃　　　┃神兽保佑

*　　┃　　　┃代码无BUG！

*　　┃　　　┗━━━┓

*　　┃　　　　　　　┣┓

*　　┃　　　　　　　┏┛

*　　┗┓┓┏━┳┓┏┛

*　　　┃┫┫　┃┫┫

*　　　┗┻┛　┗┻┛

*　　
@description : ${entity} 控制器




 </span><span style="color: #808080">@author</span><span style="color: #008000"> ${author}


@since ${date}

*/

if(${restControllerStyle})
@RestController
else
@Controller
end
@RequestMapping("#if(${package.ModuleName})/${package.ModuleName}#end/#if(${controllerMappingHyphenStyle})${controllerMappingHyphen}#else${table.entityPath}#end")
if(${superControllerClass})
public class ${table.controllerName} extends ${superControllerClass} {
else
public class ${table.controllerName} {
end
</span><span style="color: #0000ff">private</span> <span style="color: #0000ff">final</span> Logger logger = LoggerFactory.getLogger(${table.controllerName}.<span style="color: #0000ff">class</span><span style="color: #000000">);

@Autowired
</span><span style="color: #0000ff">public</span><span style="color: #000000"> ${table.serviceName} ${table.entityPath}Service;

</span><span style="color: #008000">/**</span><span style="color: #008000">
 * @description : 获取分页列表
 * ---------------------------------
 * </span><span style="color: #808080">@author</span><span style="color: #008000"> : ${author}
 * </span><span style="color: #808080">@since</span><span style="color: #008000"> : Create in ${date}
 </span><span style="color: #008000">*/</span><span style="color: #000000">
@RequestMapping(value </span>= "/get${entity}List",method =<span style="color: #000000"> RequestMethod.POST)
</span><span style="color: #0000ff">public</span> Object get${entity}List(${entity} param , @RequestParam(value = "draw",defaultValue = "0"<span style="color: #000000">) Integer draw,
                                    @RequestParam(value </span>= "length"<span style="color: #000000">) Integer length,
                                    @RequestParam(value </span>= "start"<span style="color: #000000">) Integer start) {
        DatatablesJSON</span>&lt;${entity}&gt; resJson=<span style="color: #0000ff">new</span> DatatablesJSON&lt;&gt;<span style="color: #000000">();
        </span><span style="color: #0000ff">try</span><span style="color: #000000"> {
            Integer pageNo</span>=<span style="color: #000000">getPageNo(start,length);
            Page</span>&lt;${entity}&gt; page=<span style="color: #0000ff">new</span> Page&lt;${entity}&gt;<span style="color: #000000">(pageNo,length);
            ${table.entityPath}Service.selectPage(page,</span><span style="color: #0000ff">new</span> EntityWrapper&lt;${entity}&gt;<span style="color: #000000">(param));
            resJson.setDraw(draw</span>++<span style="color: #000000">);
            resJson.setRecordsTotal(page.getTotal());
            resJson.setRecordsFiltered(page.getTotal());
            resJson.setData(page.getRecords());
            resJson.setSuccess(</span><span style="color: #0000ff">true</span><span style="color: #000000">);
        }</span><span style="color: #0000ff">catch</span><span style="color: #000000"> (Exception e){
            resJson.setSuccess(</span><span style="color: #0000ff">false</span><span style="color: #000000">);
            resJson.setError(</span>"异常信息:{"+e.getClass().getName()+"}"<span style="color: #000000">);
            logger.info(</span>"异常信息:{}"+<span style="color: #000000">e.getMessage());
        }
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> resJson;
}

</span><span style="color: #008000">/**</span><span style="color: #008000">
 * @description : 通过id获取${entity}
 * ---------------------------------
 * </span><span style="color: #808080">@author</span><span style="color: #008000"> : ${author}
 * </span><span style="color: #808080">@since</span><span style="color: #008000"> : Create in ${date}
 </span><span style="color: #008000">*/</span><span style="color: #000000">
@RequestMapping(value </span>= "/get${entity}ById",method =<span style="color: #000000"> RequestMethod.GET)
</span><span style="color: #0000ff">public</span><span style="color: #000000"> Object get${entity}ById(String id) {
        JSONResult</span>&lt;${entity}&gt; resJson = <span style="color: #0000ff">new</span> JSONResult&lt;&gt;<span style="color: #000000">();
        </span><span style="color: #0000ff">try</span><span style="color: #000000"> {
            ${entity} param</span>=<span style="color: #000000"> ${table.entityPath}Service.selectById(id);
            resJson.setData(param);
            resJson.setSuccess(</span><span style="color: #0000ff">true</span><span style="color: #000000">);
        }</span><span style="color: #0000ff">catch</span><span style="color: #000000"> (Exception e) {
            resJson.setSuccess(</span><span style="color: #0000ff">false</span><span style="color: #000000">);
            resJson.setMessage(</span>"异常信息:{"+e.getClass().getName()+"}"<span style="color: #000000">);
            logger.info(</span>"异常信息:{}"+<span style="color: #000000">e.getMessage());
        }
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> resJson;
}

</span><span style="color: #008000">/**</span><span style="color: #008000">
 * @description : 通过id删除${entity}
 * ---------------------------------
 * </span><span style="color: #808080">@author</span><span style="color: #008000"> : ${author}
 * </span><span style="color: #808080">@since</span><span style="color: #008000"> : Create in ${date}
 </span><span style="color: #008000">*/</span><span style="color: #000000">
@RequestMapping(value </span>= "/delete${entity}ById",method =<span style="color: #000000"> RequestMethod.GET)
</span><span style="color: #0000ff">public</span><span style="color: #000000"> Object delete${entity}ById(String id) {
        JSONResult</span>&lt;${entity}&gt; resJson = <span style="color: #0000ff">new</span> JSONResult&lt;&gt;<span style="color: #000000">();
        </span><span style="color: #0000ff">try</span><span style="color: #000000">{
            resJson.setSuccess(${table.entityPath}Service.deleteById(id));
        }</span><span style="color: #0000ff">catch</span><span style="color: #000000"> (Exception e) {
            resJson.setSuccess(</span><span style="color: #0000ff">false</span><span style="color: #000000">);
            resJson.setMessage(</span>"异常信息:{"+e.getClass().getName()+"}"<span style="color: #000000">);
            logger.info(</span>"异常信息:{}"+<span style="color: #000000">e.getMessage());
        }
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> resJson;
}

</span><span style="color: #008000">/**</span><span style="color: #008000">
 * @description : 通过id更新${entity}
 * ---------------------------------
 * </span><span style="color: #808080">@author</span><span style="color: #008000"> : ${author}
 * </span><span style="color: #808080">@since</span><span style="color: #008000"> : Create in ${date}
 </span><span style="color: #008000">*/</span><span style="color: #000000">
@RequestMapping(value </span>= "/update${entity}ById",method =<span style="color: #000000"> RequestMethod.POST)
</span><span style="color: #0000ff">public</span><span style="color: #000000"> Object update${entity}ById(${entity} param) {
        JSONResult</span>&lt;${entity}&gt; resJson = <span style="color: #0000ff">new</span> JSONResult&lt;&gt;<span style="color: #000000">();
        </span><span style="color: #0000ff">try</span><span style="color: #000000">{
            resJson.setSuccess(${table.entityPath}Service.updateById(param));
        }</span><span style="color: #0000ff">catch</span><span style="color: #000000"> (Exception e) {
            resJson.setSuccess(</span><span style="color: #0000ff">false</span><span style="color: #000000">);
            resJson.setMessage(</span>"异常信息:{"+e.getClass().getName()+"}"<span style="color: #000000">);
            logger.info(</span>"异常信息:{}"+<span style="color: #000000">e.getMessage());
        }
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> resJson;
}

</span><span style="color: #008000">/**</span><span style="color: #008000">
 * @description : 添加${entity}
 * ---------------------------------
 * </span><span style="color: #808080">@author</span><span style="color: #008000"> : ${author}
 * </span><span style="color: #808080">@since</span><span style="color: #008000"> : Create in ${date}
 </span><span style="color: #008000">*/</span><span style="color: #000000">
@RequestMapping(value </span>= "/add${entity}",method =<span style="color: #000000"> RequestMethod.POST)
</span><span style="color: #0000ff">public</span><span style="color: #000000"> Object add${entity}(${entity} param) {
        JSONResult</span>&lt;${entity}&gt; resJson = <span style="color: #0000ff">new</span> JSONResult&lt;&gt;<span style="color: #000000">();
        </span><span style="color: #0000ff">try</span><span style="color: #000000">{
            resJson.setSuccess(${table.entityPath}Service.insert(param));
        }</span><span style="color: #0000ff">catch</span><span style="color: #000000"> (Exception e) {
            resJson.setSuccess(</span><span style="color: #0000ff">false</span><span style="color: #000000">);
            resJson.setMessage(</span>"异常信息:{"+e.getClass().getName()+"}"<span style="color: #000000">);
            logger.info(</span>"异常信息:{}"+<span style="color: #000000">e.getMessage());
        }
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> resJson;
}

}

除了这个文件，其他代码模板我都是按照官网那样的，这里引用3个外部的文件，有AbstractController.java（控制器基类）、DatatablesJSON.java和JSONResult.java，然后这些文件又引用了其他文件，我懵逼了，怎么文件这么多啊，看来如果全部都贴上来得多占地方啊，所以我选择相信码云，如果需要请在码云上按照少的文件下载，码云地址。需要注意的是，我的模板是直接代替了mybatis-plus.jar中的templates目录。

最后就到了测试过程

下面的代码段都是放在Controller文件里面，然后启动程序，对应端口，请求方法。测试的话是需要按照自己的实体类操作的，所以仅供参考。

    /**
     * 分页 PAGE
     */
    @GetMapping("/test")
    public Page<User> test() {
        return userService.selectPage(new Page<User>(0, 12));
    }
</span><span style="color: #008000">/**</span><span style="color: #008000">
 * AR 部分测试
 </span><span style="color: #008000">*/</span><span style="color: #000000">
@GetMapping(</span>"/test1"<span style="color: #000000">)
</span><span style="color: #0000ff">public</span> Page&lt;User&gt;<span style="color: #000000"> test1() {
    User user </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> User();
    System.err.println(</span>"删除所有：" + user.delete(<span style="color: #0000ff">null</span><span style="color: #000000">));
    </span><span style="color: #008000">//</span><span style="color: #008000">user.setId(2017091801L);</span>
    user.setAccout("test"+num++<span style="color: #000000">);
    user.setType(</span>"test"<span style="color: #000000">);
    user.setCreateTime(</span><span style="color: #0000ff">new</span><span style="color: #000000"> Date());
    user.setPhone(</span>"13111110000"<span style="color: #000000">);
    user.setPassword(</span>"123456"<span style="color: #000000">);
    user.setNickname(</span>"guangqing"+2*num++<span style="color: #000000">);
    user.insert();
    System.err.println(</span>"查询插入结果：" +<span style="color: #000000"> user.selectById().toString());
    </span><span style="color: #008000">//</span><span style="color: #008000">user.setNickname("mybatis-plus-ar");</span>
    System.err.println("更新：" +<span style="color: #000000"> user.updateById());
    </span><span style="color: #0000ff">return</span> user.selectPage(<span style="color: #0000ff">new</span> Page&lt;User&gt;(0, 12), <span style="color: #0000ff">null</span><span style="color: #000000">);
}

</span><span style="color: #008000">/**</span><span style="color: #008000">
 * 增删改查 CRUD
 </span><span style="color: #008000">*/</span><span style="color: #000000">
@GetMapping(</span>"/test2"<span style="color: #000000">)
</span><span style="color: #0000ff">public</span><span style="color: #000000"> User test2() {
    User user </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> User();
    user.setId(</span>123456L<span style="color: #000000">);
    user.setAccout(</span>"test"<span style="color: #000000">);
    user.setType(</span>"test"<span style="color: #000000">);
    user.setCreateTime(</span><span style="color: #0000ff">new</span><span style="color: #000000"> Date());
    user.setPhone(</span>"13111110000"<span style="color: #000000">);
    user.setPassword(</span>"123456"<span style="color: #000000">);
    user.setNickname(</span>"guangqing"<span style="color: #000000">);
    System.err.println(</span>"删除一条数据：" + userService.deleteById(1L<span style="color: #000000">));
    System.err.println(</span>"插入一条数据：" +<span style="color: #000000"> userService.insert(user));
    User user2 </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> User();
    user.setId(</span>223456L<span style="color: #000000">);
    user.setAccout(</span>"test2"<span style="color: #000000">);
    user.setType(</span>"test"<span style="color: #000000">);
    user.setCreateTime(</span><span style="color: #0000ff">new</span><span style="color: #000000"> Date());
    user.setPhone(</span>"13111110000"<span style="color: #000000">);
    user.setPassword(</span>"123456"<span style="color: #000000">);
    user.setNickname(</span>"guangqing"<span style="color: #000000">);
    </span><span style="color: #0000ff">boolean</span> result =<span style="color: #000000"> userService.insert(user);
    </span><span style="color: #008000">//</span><span style="color: #008000"> 自动回写的ID</span>
    Long id =<span style="color: #000000"> user.getId();
    System.err.println(</span>"插入一条数据：" + result + ", 插入信息：" +<span style="color: #000000"> user.toString());
    System.err.println(</span>"查询：" +<span style="color: #000000"> userService.selectById(id).toString());
    Page</span>&lt;User&gt; userListPage = userService.selectPage(<span style="color: #0000ff">new</span> Page&lt;User&gt;(1, 5), <span style="color: #0000ff">new</span> EntityWrapper&lt;&gt;(<span style="color: #0000ff">new</span><span style="color: #000000"> User()));
    System.err.println(</span>"total=" + userListPage.getTotal() + ", current list size=" +<span style="color: #000000"> userListPage.getRecords().size());
    </span><span style="color: #0000ff">return</span> userService.selectById(1L<span style="color: #000000">);
}

@GetMapping(</span>"testSelect"<span style="color: #000000">)
</span><span style="color: #0000ff">public</span><span style="color: #000000"> Object testSelect() {
    Integer start </span>= 0<span style="color: #000000">;
    Integer length </span>=10<span style="color: #000000">;
    User param </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> User();
    </span><span style="color: #008000">//</span><span style="color: #008000">param.setNickname("guangqing2");</span>
    Integer pageNo=<span style="color: #000000">getPageNo(start,length);
    Page</span>&lt;User&gt; page =<span style="color: #0000ff">new</span> Page&lt;User&gt;<span style="color: #000000">(pageNo,length);
    EntityWrapper</span>&lt;User&gt; ew = <span style="color: #0000ff">new</span> EntityWrapper&lt;User&gt;<span style="color: #000000">();
    ew.setEntity(param);
    ew.where(</span>"password={0}","123456"<span style="color: #000000">)
            .like(</span>"nickname","guangqing"<span style="color: #000000">)
            .ge(</span>"create_time","2017-09-21 15:50:00"<span style="color: #000000">);
    userService.selectPage(page, ew);
    DatatablesJSON</span>&lt;User&gt; resJson= <span style="color: #0000ff">new</span> DatatablesJSON&lt;&gt;<span style="color: #000000">();
    </span><span style="color: #008000">//</span><span style="color: #008000">resJson.setDraw(draw++);</span>

        resJson.setRecordsTotal(page.getTotal());

resJson.setRecordsFiltered(page.getTotal());

resJson.setData(page.getRecords());

return resJson;

}
@GetMapping(</span>"/selectsql"<span style="color: #000000">)
</span><span style="color: #0000ff">public</span><span style="color: #000000"> Object getUserBySql() {
    JSONObject result </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> JSONObject();
    result.put(</span>"records"<span style="color: #000000">, userService.selectListBySQL());
    </span><span style="color: #0000ff">return</span><span style="color: #000000"> result;
}

</span><span style="color: #008000">/**</span><span style="color: #008000">
 * 7、分页 size 一页显示数量  current 当前页码
 * 方式一：</span><span style="color: #008000; text-decoration: underline">http://localhost</span><span style="color: #008000">:8080/user/page?size=1&amp;current=1&lt;br&gt;
 * 方式二：</span><span style="color: #008000; text-decoration: underline">http://localhost</span><span style="color: #008000">:8080/user/pagehelper?size=1&amp;current=1&lt;br&gt;
 </span><span style="color: #008000">*/</span>

<span style="color: #008000">//</span><span style="color: #008000"> 参数模式分页</span>
@GetMapping("/page"<span style="color: #000000">)
</span><span style="color: #0000ff">public</span><span style="color: #000000"> Object page(Page page) {
    </span><span style="color: #0000ff">return</span><span style="color: #000000"> userService.selectPage(page);
}

</span><span style="color: #008000">//</span><span style="color: #008000"> ThreadLocal 模式分页</span>
@GetMapping("/pagehelper"<span style="color: #000000">)
</span><span style="color: #0000ff">public</span><span style="color: #000000"> Object pagehelper(Page page) {
    PageHelper.setPagination(page);
    page.setRecords(userService.selectList(</span><span style="color: #0000ff">null</span><span style="color: #000000">));
    page.setTotal(PageHelper.freeTotal());</span><span style="color: #008000">//</span><span style="color: #008000">获取总数并释放资源 也可以 PageHelper.getTotal()</span>
    <span style="color: #0000ff">return</span><span style="color: #000000"> page;
}


</span><span style="color: #008000">/**</span><span style="color: #008000">
 * 测试事物
 * </span><span style="color: #008000; text-decoration: underline">http://localhost</span><span style="color: #008000">:8080/user/test_transactional&lt;br&gt;
 * 访问如下并未发现插入数据说明事物可靠！！&lt;br&gt;
 * </span><span style="color: #008000; text-decoration: underline">http://localhost</span><span style="color: #008000">:8080/user/test&lt;br&gt;
 * &lt;br&gt;
 * 启动  Application 加上 @EnableTransactionManagement 注解其实可无默认貌似就开启了&lt;br&gt;
 * 需要事物的方法加上 @Transactional 必须的哦！！
 </span><span style="color: #008000">*/</span><span style="color: #000000">
@Transactional
@GetMapping(</span>"/test_transactional"<span style="color: #000000">)
</span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> testTransactional() {
    </span><span style="color: #008000">//</span><span style="color: #008000">userService.insert(new User(1000L, "测试事物", 16, 3));</span>
    System.out.println(" 这里手动抛出异常，自动回滚数据"<span style="color: #000000">);
    </span><span style="color: #0000ff">throw</span> <span style="color: #0000ff">new</span><span style="color: #000000"> RuntimeException();
}</span></pre>

这么多的测试，我觉得最有趣的是条件构造器，在官网上有更齐全的，而我这里是按照我自己的需求写的。

最后谢谢大家的观看，写博客经验不足，写得不好请见谅，如果能给你带来帮助请点个赞，若遇到不明白的，或者我有写错的地方请提出，谢谢！

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原文地址：https://www.cnblogs.com/jpfss/p/8280589.html