maven 整合spring+springmvc+mybatis+mysql

maven 环境变量配置

Maven下载

下载地址：http://maven.apache.org/download.cgi

apache-maven路径（版本是会不断更新的）

系统环境变量配置HOME_MAVEN

电脑——>属性——>高级系统设置——>环境变量

1新建环境变量（用户变量）HOME_MAVEN，变量值是apache-maven路径。

 2.编辑系统变量里的path，把apache-maven里的bin路径添加到变量值的后面，我的是 ;F:mvnapache-maven-3.5.4in; 。(注意前后要有；号，也可以是%MAVEN_HOME%in，如何用这个报错可以试试前面的绝对路径。 )

 

 3.配置本地maven仓库路径

找到文件settings.xml ，    我的在F:mvnapache-maven-3.5.4conf 文件夹下

默认的本地库的路径是C盘的${user}/.m2/repository/

配置自定义仓库地址

<localRepository>F:/repository</localRepository>

maven配置阿里镜像。

<mirror>
<id>alimaven</id>
<name>aliyun maven</name>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
<mirrorOf>central</mirrorOf>
</mirror>

 4.eclipse配置maven。

Windows->preferences,配置maven的installations，点击add，点击directory，installation home是maven安装的路径，installation name自动带出。

配置maven user settins。点击Window的属性。

 下面这个配置，解决更新项目的时候，报Dmaven.multiModuleProjectDirectory某某set的问题。

在default vm处配置改为-Dmaven.multiModuleProjectDirectory=$MAVEN_HOME。（等号前面固定，等号后边是Maven配置的变量名称）。

*新建maven工程。

 建好项目后会报红星错误，bulid path jdk版本换成默认的，或者和下面jdk相同版本，然后按照下面的配置，然后clean一下。

 点击project里的属性。

上面错误解决方式。

1.web.xml里的

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">的web-app的版本号改为3.0.

2.找到org.eclipse.wst.common.project.facet.core.xml文件，修改java为1.8，jst.web为3.0.

如果没有显示.settings文件夹。按照下面操作。

1.选中工程，选择Filters

 2.取消.resources勾选，点击OK.显示.settings文件夹, .classpath 文件, .project文件, .gitignore文件

 

 新建src/main/resources.（注意一定要是新建source Folder类型的）

 SSM整合。

 一先整体看下项目的目录结构

未展开的目录结构。

 展开后的目录结构。

 

 

二、maven需要引入的jar包，pom.xml

 

 

三、建立JDBC属性配置文件，jdbc.properties

#数据库驱动

driver=com.mysql.jdbc.Driver

#数据库连接

url=jdbc:mysql://localhost:3306/konglx?useUnicode=true&characterEncoding=UTF-8

#用户名

username=root

#用户密码

password=root

#定义初始连接数

initialSize=0

#定义最大连接数

maxActive=20

#定义最大空闲

maxIdle=20

#定义最小空闲

minIdle=1

#定义最长等待时间

maxWait=60000

四、log4j日志配置文件 ， log4j.properties

# This is the configuring for logging displayed in the Application Server
log4j.rootCategory=INFO, stdout,common-default,common-warn,common-error

# project loggers
#log4j.logger.com.konglx.dao=INFO,project-dao
log4j.logger.com.konglx.service=INFO,project-service
log4j.logger.com.konglx.controller=INFO,project-web

# common appenders
#stdout configure
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.conversionPattern= %d [%X{loginUserId}/%X{req.remoteAddr}/%X{traceId} - %X{entranceMethod} - %X{req.requestURIWithQueryString}] %-5p %c - %m%n

#common-default file appender
log4j.appender.common-default=org.apache.log4j.DailyRollingFileAppender
log4j.appender.common-default.file=${user.home}/logs/common-default.log
log4j.appender.common-default.layout=org.apache.log4j.PatternLayout
log4j.appender.common-default.layout.conversionPattern= %d [%X{loginUserId}/%X{req.remoteAddr}/%X{traceId} - %X{entranceMethod} - %X{req.requestURIWithQueryString}] %-5p %c - %m%n

#common-warn file appender
log4j.appender.common-warn=org.apache.log4j.DailyRollingFileAppender
log4j.appender.common-warn.file=${user.home}/logs/common-warn.log
log4j.appender.common-warn.layout=org.apache.log4j.PatternLayout
log4j.appender.common-warn.filter.ID=org.apache.log4j.varia.LevelRangeFilter
log4j.appender.common-warn.filter.ID.levelMin=WARN
log4j.appender.common-warn.filter.ID.levelMax=WARN
log4j.appender.common-warn.layout.conversionPattern= %d [%X{loginUserId}/%X{req.remoteAddr}/%X{traceId} - %X{entranceMethod} - %X{req.requestURIWithQueryString}] %-5p %c - %m%n

#common-error file appender
log4j.appender.common-error=org.apache.log4j.DailyRollingFileAppender
log4j.appender.common-error.file=${user.home}/logs/common-error.log
log4j.appender.common-error.layout=org.apache.log4j.PatternLayout
log4j.appender.common-error.threshold=ERROR
log4j.appender.common-error.layout.conversionPattern= %d [%X{loginUserId}/%X{req.remoteAddr}/%X{traceId} - %X{entranceMethod} - %X{req.requestURIWithQueryString}] %-5p %c - %m%n

#common-dao file appender
log4j.appender.common-dao=org.apache.log4j.DailyRollingFileAppender
log4j.appender.common-dao.file=${user.home}/logs/common-dao.log
log4j.appender.common-dao.layout=org.apache.log4j.PatternLayout
log4j.appender.common-dao.layout.conversionPattern= %d [%X{loginUserId}/%X{req.remoteAddr}/%X{traceId} - %X{entranceMethod} - %X{req.requestURIWithQueryString}] %-5p %c - %m%n

#common-web file appender
log4j.appender.common-web=org.apache.log4j.DailyRollingFileAppender
log4j.appender.common-web.file=${user.home}/logs/common-web.log
log4j.appender.common-web.layout=org.apache.log4j.PatternLayout
log4j.appender.common-web.layout.conversionPattern= %d [%X{loginUserId}/%X{req.remoteAddr}/%X{traceId} - %X{entranceMethod} - %X{req.requestURIWithQueryString}] %-5p %c - %m%n

#common-pageNotFound file appender
log4j.appender.common-pageNotFound=org.apache.log4j.DailyRollingFileAppender
log4j.appender.common-pageNotFound.file=${user.home}/logs/common-pageNotFound.log
log4j.appender.common-pageNotFound.layout=org.apache.log4j.PatternLayout
log4j.appender.common-pageNotFound.layout.conversionPattern= %d [%X{loginUserId}/%X{req.remoteAddr}/%X{traceId} - %X{entranceMethod} - %X{req.requestURIWithQueryString}] %-5p %c - %m%n

# project appenders

#project-dao file appender
#log4j.appender.project-dao=org.apache.log4j.DailyRollingFileAppender
#log4j.appender.project-dao.file=${user.home}/logs/project-dao.log
#log4j.appender.project-dao.layout=org.apache.log4j.PatternLayout
#log4j.appender.project-dao.threshold=INFO
#log4j.appender.project-dao.layout.conversionPattern= %d [%X{loginUserId}/%X{req.remoteAddr}/%X{traceId} - %X{entranceMethod} - %X{req.requestURIWithQueryString}] %-5p %c - %m%n

#project-web file appender
log4j.appender.project-web=org.apache.log4j.DailyRollingFileAppender
log4j.appender.project-web.file=${user.home}/logs/project-web.log
log4j.appender.project-web.layout=org.apache.log4j.PatternLayout
log4j.appender.project-web.threshold=INFO
log4j.appender.project-web.layout.conversionPattern= %d [%X{loginUserId}/%X{req.remoteAddr}/%X{traceId} - %X{entranceMethod} - %X{req.requestURIWithQueryString}] %-5p %c - %m%n

#project-service file appender
log4j.appender.project-service=org.apache.log4j.DailyRollingFileAppender
log4j.appender.project-service.file=${user.home}/logs/project-service.log
log4j.appender.project-service.layout=org.apache.log4j.PatternLayout
log4j.appender.project-service.threshold=INFO
log4j.appender.project-service.layout.conversionPattern= %d [%X{loginUserId}/%X{req.remoteAddr}/%X{traceId} - %X{entranceMethod} - %X{req.requestURIWithQueryString}] %-5p %c - %m%n

# open source framework loggers

#spring
log4j.logger.org.springframework=INFO
log4j.logger.org.springframework.jdbc=DEBUG,common-dao

# debug log for ibatis2.3
#log4j.logger.java.sql.Connection=DEBUG,common-dao
#log4j.logger.java.sql.Statement=INFO,common-dao
#log4j.logger.java.sql.PreparedStatement=INFO,common-dao
#log4j.logger.java.sql.ResultSet=INFO,common-dao

# debug log for mybatis
log4j.logger.java.sql.Connection=DEBUG,common-dao
log4j.logger.java.sql.Statement=DEBUG,common-dao
log4j.logger.java.sql.PreparedStatement=DEBUG,common-dao
log4j.logger.java.sql.ResultSet=DEBUG,common-dao
log4j.logger.org.mybatis.spring=DEBUG,common-dao
log4j.logger.com.springframework=DEBUG

# hibernate: Changing the log level to DEBUG will display SQL Hibernate generated
#log4j.logger.org.hibernate=INFO,common-dao
#log4j.logger.org.hibernate.SQL=ERROR
#log4j.logger.org.hibernate.cache=ERROR
#log4j.logger.net.sf.ehcache=ERROR

#springmvc pageNotFound
log4j.logger.org.springframework.web.servlet.PageNotFound=INFO,common-pageNotFound

#HibernateValidator
log4j.logger.org.apache.commons.validator.ValidatorResources=INFO

#log4jdbc,
log4j.logger.jdbc.sqlonly=ON
log4j.logger.jdbc.sqltiming=INFO,common-dao
log4j.logger.jdbc.audit=ON
log4j.logger.jdbc.resultset=ON
log4j.logger.jdbc.connection=ON

#====add==
### direct messages to file hibernate.log ###
#log4j.appender.file=org.apache.log4j.FileAppender
#log4j.appender.file.File=hibernate.log
#log4j.appender.file.layout=org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger = debug , stdout

#log4j.logger.org.hibernate=info
#log4j.logger.org.hibernate=debug

### log HQL query parser activity
#log4j.logger.org.hibernate.hql.ast.AST=debug

### log just the SQL
#log4j.logger.org.hibernate.SQL=debug

### log JDBC bind parameters ###
#log4j.logger.org.hibernate.type=trace
#log4j.logger.org.hibernate.type=debug

### log schema export/update ###
#log4j.logger.org.hibernate.tool.hbm2ddl=debug

### log HQL parse trees
#log4j.logger.org.hibernate.hql=debug

### log cache activity ###
#log4j.logger.org.hibernate.cache=debug

### log transaction activity
#log4j.logger.org.hibernate.transaction=debug

### log JDBC resource acquisition
#log4j.logger.org.hibernate.jdbc=debug

### enable the following line if you want to track down connection ###
### leakages when using DriverManagerConnectionProvider ###
#log4j.logger.org.hibernate.connection.DriverManagerConnectionProvider=trace

五、建立spring-mybatis.xml配置文件

这个文件就是用来完成spring和mybatis的整合的，包含spring和mybatis的配置，包括自动扫描，自动注入，配置数据库；

 六、整合springMVC，spring-mvc.xml

　　上面已经完成了2大框架的整合，SpringMVC的配置文件单独放，然后在web.xml中配置整合，主要是自动扫描控制器，视图模式，注解的启动这三个

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
                            http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
                            http://www.springframework.org/schema/context  
                            http://www.springframework.org/schema/context/spring-context-4.0.xsd  
                            http://www.springframework.org/schema/mvc  
                            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!--避免IE执行AJAX时，返回JSON出现下载文件 -->
    <bean id="mappingJacksonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/html;charset=UTF-8</value>
            </list>
        </property>
    </bean>
    <!-- 启动SpringMVC的注解功能，完成请求和注解POJO的映射 -->
    <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <!-- JSON转换器 -->
                <ref bean="mappingJacksonHttpMessageConverter" />    
            </list>
        </property>
    </bean>
    <!-- 对静态资源的访问 -->
    <!-- <mvc:resources mapping="/js/**" location="/js/" /> 
        <mvc:resources mapping="/css/**" location="/css/" /> -->
    <!-- 自动扫描该包，使SpringMVC认为包下用了@controller注解的类是控制器 -->
    <context:component-scan base-package="com.konglx.controller" />
    <!-- 添加注解驱动 -->
    <mvc:annotation-driven enable-matrix-variables="true" />
    <!-- 允许对静态资源文件的访问 -->
    <mvc:default-servlet-handler />
    <!-- 定义跳转的文件的前后缀 ，视图模式配置 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址 -->
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>
    <!-- 配置文件上传，如果没有使用文件上传可以不用配置，当然如果不配，那么配置文件中也不必引入上传组件包 -->
    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- 默认编码 -->
        <property name="defaultEncoding" value="UTF-8" />
        <!-- 文件大小最大值 -->
        <property name="maxUploadSize" value="10485760000" />
        <!-- 内存中的最大值 -->
        <property name="maxInMemorySize" value="40960" />
    </bean>
</beans>

 

 七、配置web.xml

           这里面是对spring-mybatis.xml的引入以及配置的spring-mvc的Servlet就是为了完成SSM整合，之前2框架整合不需要在此处进行任何配置。

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">
    <display-name>Archetype Created Web Application</display-name>
    
    <!-- Spring和mybatis的配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-*.xml</param-value>
    </context-param>
    
    <!-- 编码过滤器 -->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <async-supported>true</async-supported>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    <!-- Spring监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <!-- 防止Spring内存溢出监听器 -->
    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>
    
    <!-- Spring MVC servlet -->
    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <!-- 此处可以可以配置成*.do，对应struts的后缀习惯 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
    <welcome-file-list>
        <welcome-file>/index.html</welcome-file>
        <welcome-file>/index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

 到目前为止，所有的整合已经完成，配置文件也搞好了，接下来就利用mybatis来自动生成一些java代码：

首先，我们建立数据库：下面是建库建表的语句

CREATE DATABASE `konglx` 

DROP TABLE IF EXISTS `user_t`;

CREATE TABLE `user_t` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_name` varchar(40) NOT NULL,
  `password` varchar(255) NOT NULL,
  `age` int(4) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

INSERT INTO `user_t` VALUES (1,'project_star-konglx','123',24);

逆向工程的2种方式。

1.利用MyBatis Generator自动创建代码

在f盘上建立一个文件夹（本文用到的文件夹不包含中文字符），然后在里面建个src文件夹，里面的东西如下图：

generatorConfig.xml需要手动配置，下面附上配置的内容信息：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
    <!-- 数据库驱动 -->
    <classPathEntry location="mysql-connector-java-5.1.45-bin.jar" />
    <context id="DB2Tables" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="true" />
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true" />
        </commentGenerator>
        <!--数据库链接URL，用户名、密码 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/konglx" userId="root" password="root">
        </jdbcConnection>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>
        <!-- 生成模型的包名和位置 -->
        <javaModelGenerator targetPackage="com.konglx.bean"
            targetProject="src">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>
        <!-- 生成映射文件的包名和位置 -->
        <sqlMapGenerator targetPackage="com.konglx.mapping"
            targetProject="src">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>
        <!-- 生成DAO的包名和位置 -->
        <javaClientGenerator type="XMLMAPPER"
            targetPackage="com.konglx.dao" targetProject="src">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>
        <!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名 -->
        <table tableName="user_t" domainObjectName="User"
            enableCountByExample="false" enableUpdateByExample="false"
            enableDeleteByExample="false" enableSelectByExample="false"
            selectByExampleQueryId="false"></table>
    </context>
</generatorConfiguration>

最后，打开cmd，进入该文件夹（也可以在这个文件夹中按住 shift + 右击，选择"在此处打开命令窗口"），复制粘贴以下代码+回车

Java -jar mybatis-generator-core-1.3.6.jar -configfile generatorConfig.xml -overwrite

完成后，到该文件夹下打开src,如下

2.利用java自动创建代码

利用java生成代码，只要在generatorTemp.java文件运行main方法就可以了。run as ->java applicatoin.F5刷新整个项目，会在下面目录生成目录文件。

 generatorTemp.java文件和generator.xml文件的目录。

 generatorTemp.java文件内容。

package generator;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.exception.XMLParserException;
import org.mybatis.generator.internal.DefaultShellCallback;
import org.springframework.core.io.DefaultResourceLoader;

public class generatorTemp {

    public void generator() throws Exception {

        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        
        
     // 获取文件分隔符
     		//String separator = File.separator;
     		
     		// 获取工程路径
     		//File projectPath = new DefaultResourceLoader().getResource("").getFile();
     		//while(!new File(projectPath.getPath()+separator+"src"+separator+"main").exists()){
     			//projectPath = projectPath.getParentFile();
     		//}
     		
     		
     		// 模板文件路径  F:workspaceproject_starsrcmainjavageneratorgenerator.xml
     		//String tplPath = StringUtils.replace(projectPath+"/src/main/java/com/thinkgem/jeesite/generate/template", "/", separator);
        //指定 逆向工程配置文件
        File configFile = new File("./src/main/java/generator/generator.xml");
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(configFile);
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
                callback, warnings);
        myBatisGenerator.generate(null);

    }

    public static void main(String[] args) throws Exception {
        try {
            generatorTemp generatorSqlmap = new generatorTemp();
            generatorSqlmap.generator();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

generator.xml文件内容。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
    <context id="testTables" targetRuntime="MyBatis3">
        <commentGenerator>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true" />
        </commentGenerator>
        <!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/konglx" userId="root"
                        password="root">
        </jdbcConnection>
        <!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把JDBC DECIMAL 和
            NUMERIC 类型解析为java.math.BigDecimal -->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!-- targetProject:生成PO类的位置 -->
        <javaModelGenerator targetPackage="com.konglx.bean"
                            targetProject="./src">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
            <!-- 从数据库返回的值被清理前后的空格 -->
            <property name="trimStrings" value="true" />
        </javaModelGenerator>
        <!-- targetProject:mapper映射文件生成的位置 -->
        <sqlMapGenerator targetPackage="com.konglx.mapper"
                         targetProject="./src">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
        </sqlMapGenerator>
        <!-- targetPackage：mapper接口生成的位置 -->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.konglx.mapper"
                             targetProject="./src">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
        </javaClientGenerator>
        <!-- 指定数据库表 -->
        <table schema="" tableName="user_t"></table>


    </context>
</generatorConfiguration>

 service接口

package com.konglx.service;

import com.konglx.bean.User;

public interface UserService {
    
     public User getUserById(int userId);
    
}

serviceImpl实现类

package com.konglx.service.impl;

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

import com.konglx.bean.User;
import com.konglx.dao.UserMapper;
import com.konglx.service.UserService;

@Service("userService")
public class UserServiceImpl implements UserService{
    
    @Autowired
    private UserMapper userDao;
    
    @Override
    public User getUserById(int userId) {

        return this.userDao.selectByPrimaryKey(userId);

    }

}

手动创建jsp页面 

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>project_star</title>
</head>
<body>
    <h1>${user.userName}</h1>
</body>
</html>

手动创建controller

package com.konglx.controller;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.konglx.bean.User;
import com.konglx.service.impl.UserServiceImpl;

@Controller
@RequestMapping(value = "/user")
public class UserController {
    
    @Autowired
    private UserServiceImpl userServiceImpl;
    
    @RequestMapping(value = "/test")
    public String Index(HttpServletRequest request, Model model){
        int userId = Integer.parseInt(request.getParameter("id"));
        User user = userServiceImpl.getUserById(userId);
        model.addAttribute("user",user);
         return "User";
    }

}

 至此，所有的代码已经完成了

最后，项目右键-maven-update project。然后maven-maven install。然后部署项目到Tomcat。

启动服务，访问url。     http://localhost:8080/project_star/user/test?id=1

启动成功，没有报错如下图。