SSM整合（mybatis逆向工程）

Posted 2020-09-16 夏末、初秋

mybatis generator    http://www.mybatis.org/generator/

　　1、首先要引用jar包

　　　　 <!-- MyBatis Generator Core-->
        <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.2</version>
        </dependency>

　　2、添加一个配置文件mgb.xml（MBG配置（mybatis generator简称））

          http://www.mybatis.org/generator/configreference/xmlconfig.html

<?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>
  <classPathEntry location="/Program Files/IBM/SQLLIB/java/db2java.zip" />

  <context id="DB2Tables" targetRuntime="MyBatis3">
    <jdbcConnection driverClass="COM.ibm.db2.jdbc.app.DB2Driver"
        connectionURL="jdbc:db2:TEST"
        userId="db2admin"
        password="db2admin">
    </jdbcConnection>

    <javaTypeResolver >
      <property name="forceBigDecimals" value="false" />
    </javaTypeResolver>

    <javaModelGenerator targetPackage="test.model" targetProject="\\MBGTestProject\\src">
      <property name="enableSubPackages" value="true" />
      <property name="trimStrings" value="true" />
    </javaModelGenerator>

    <sqlMapGenerator targetPackage="test.xml"  targetProject="\\MBGTestProject\\src">
      <property name="enableSubPackages" value="true" />
    </sqlMapGenerator>

    <javaClientGenerator type="XMLMAPPER" targetPackage="test.dao"  targetProject="\\MBGTestProject\\src">
      <property name="enableSubPackages" value="true" />
    </javaClientGenerator>

    <table schema="DB2ADMIN" tableName="ALLTYPES" domainObjectName="Customer" >
      <property name="useActualColumnNames" value="true"/>
      <generatedKey column="ID" sqlStatement="DB2" identity="true" />
      <columnOverride column="DATE_FIELD" property="startDate" />
      <ignoreColumn column="FRED" />
      <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" />
    </table>

  </context>
</generatorConfiguration>

 mbg.xml文件是对红色框框里的内容进行修改路径

最后一个修改table

 

去掉注释

事例

        <!--如果不配置这个，生成的文件会有很多的注释，不方便看代码-->
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
        </commentGenerator>        

最后修改后的mbg.xml

<?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>
    <!--导入的类什么的，我们不需要，直接删除-->
    <!--<classPathEntry location="/Program Files/IBM/SQLLIB/java/db2java.zip" />-->

    <context id="DB2Tables" targetRuntime="MyBatis3">
        <!--如果不配置这个，生成的文件会有很多的注释，不方便看代码-->
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
        </commentGenerator>

        <!--配置数据库连接-->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/ssm-crud"
                        userId="root"
                        password="123456">
        </jdbcConnection>
        <!--配置数据库连接-->

        <javaTypeResolver >
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!--JAVA模型生成，指定javabean生成位置-->
        <javaModelGenerator targetPackage="com.dotcore.model" targetProject=".\\src\\main\\java">
        <!--JAVA模型生成，指定javabean生成位置-->
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!--指定sql映射文件生成位置-->
        <sqlMapGenerator targetPackage="mapper"  targetProject=".\\src\\main\\resources">
        <!--指定sql映射文件生成位置-->
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <!--指定dao生成的位置，mapper接口-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.dotcore.dao"  targetProject=".\\src\\main\\java">
        <!--指定dao生成的位置，mapper接口-->
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <!--table指定表的生成策略-->
        <table tableName="tbl_emp" domainObjectName="Employee"></table>
        <table tableName="tbl_dept" domainObjectName="Department"></table>

    </context>
</generatorConfiguration>

配置写好后，最后就是生成文件了

点击java program

package com.dotcore.test;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;

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

/**
 * @author xuerr
 * @version 2017/5/3
 */
public class MBGTest {
    public static void main(String[] args) throws Exception {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        File configFile = new File("mbg.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);
    }
}

run后，就会在相应的位置生成需要的文件