Mybatis 代码自动生成（generatorConfig.xml配置）

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Mybatis最入门---代码自动生成（generatorConfig.xml配置）

MyBatis Generator generatorConfig.xml配置详解

 pom.xml<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

  <modelVersion>4.0.0</modelVersion>
  <groupId>com.watermelon</groupId>
  <artifactId>Simple</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  
  <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  
  <dependencies>
      <!-- https://mvnrepository.com/artifact/junit/junit -->
    <dependency>
        <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.3.0</version>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.38</version>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.12</version>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.7.12</version>
        <scope>test</scope>
    </dependency>
        
    <!-- https://mvnrepository.com/artifact/log4j/log4j -->
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
　　<!-- 新增加 -->

    <dependency>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-core</artifactId>
        <version>1.3.3</version>
    </dependency>
    
  </dependencies>

    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

 1.java代码生成的方式

<?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="MySqlContext" targetRuntime="MyBatis3Simple" defaultModelType="flat">
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>
        
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <property name="addRemarkComments" value="true"/>
        </commentGenerator>
        
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" 
                    connectionURL="jdbc:mysql://localhost:3306/simple"
                    userId="root"
                    password="123456">
        </jdbcConnection>
        
        <javaModelGenerator targetPackage="test.model" 
                            targetProject="srcmainjava">
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        
        <sqlMapGenerator targetPackage="test.xml" 
                        targetProject="srcmain
esources">
        </sqlMapGenerator>
        
        <javaClientGenerator type="XMLMAPPER"
                            targetPackage="test.dao" 
                            targetProject="srcmainjava">
        </javaClientGenerator>
        
        <table tableName="%">
            <generatedKey column="id" sqlStatement="MySql"/>
        </table>
    </context>
</generatorConfiguration>

package com.watermelon.generator;

import java.io.IOException;
import java.io.InputStream;
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;

public class Generator {
    public static void main(String[] args) throws Exception, XMLParserException {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        InputStream is = Generator.class.getResourceAsStream("/generator/generatorConfig.xml");
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(is);
        is.close();
        
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator mybatisGenerator = new MyBatisGenerator(config, callback, warnings);
        mybatisGenerator.generate(null);
        for(String warning:warnings) {
            System.out.println(warning);
        }
    }
}

 2.Eclispe插件的方式(推荐使用)

　　优点；在所有生成的代码中都会有@mbggenerated 标记（通过MBG生成） 但是不管是maven，还是java main方法的方式运行生成的代码，

　　重新生成后都会覆盖中间自己修改的代码。只有Eclispe插件的方式才不会修改。

插件下载地址https://github.com/mybatis/generator/releases

<?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>
    <!-- eclipse生成时必须指定classPathEntry 物理数据库驱动电脑上面可以随意指定一个 -->
    <classPathEntry location="E:javajarmysqlmysql-connector-java-5.1.18-bin.jar"/>
    <context id="MySqlContext" targetRuntime="MyBatis3Simple" defaultModelType="flat">
        <!-- 在关键字名称前后自动拼接` -->
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>
        
        <property name="javaFileEncoding" value="UTF-8"/>
        
        <!-- 加注释 ，suppressDate去掉时间-->
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <property name="addRemarkComments" value="true"/>
        </commentGenerator>
        
        <!-- 配置数据库连接 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" 
                    connectionURL="jdbc:mysql://localhost:3306/simple"
                    userId="root"
                    password="123456">
        </jdbcConnection>
        
        <!-- eclipse插件生成时必须targetProject前加项目名称 -->
        <!-- 生成Model -->
        <javaModelGenerator targetPackage="test.model" 
                            targetProject="Simplesrcmainjava">
            <!--去掉多余的空格 
                public void setUserName(String userName) {
                    this.userName = userName == null ? null : userName.trim();
                    } -->
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        
        <!-- 生成Mapper xml文件 -->
        <sqlMapGenerator targetPackage="test.xml" 
                        targetProject="Simplesrcmain
esources">
        </sqlMapGenerator>
        
        <!-- 生成对应的dao文件 -->
        <javaClientGenerator type="XMLMAPPER"
                            targetPackage="test.dao" 
                            targetProject="Simplesrcmainjava">
        </javaClientGenerator>
        
        <!-- tableName 生成的表名“%”多个表 -->
        <table tableName="%">
            <generatedKey column="id" sqlStatement="MySql"/>
        </table>
    </context>
</generatorConfiguration>

在配置文件上面单机右键运行。