基于maven实现逆向工程

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1.新建maven项目，选择：

注意：可能生出项目在index.jsp里会报错，这是因为项目没有导入Tomcat服务器，

2.在pom.xml里引入逆向工程依赖的jar包

<dependency>

    <groupId>org.mybatis.generator</groupId>

    <artifactId>mybatis-generator-core</artifactId>

    <version>1.3.5</version>

</dependency>

<dependency>

 <groupId>org.mybatis</groupId> 

 <artifactId>mybatis</artifactId> 

 <version>3.4.2</version> 

 </dependency>

<dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

<version>5.1.41</version>

</dependency>

3.建包：

4.新建bgm.xml:

内容如何编写可以参考

1：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>

  <context id="DB2Tables" targetRuntime="MyBatis3">

    <jdbcConnection

    driverClass="com.mysql.jdbc.Driver"

        connectionURL="jdbc:mysql://localhost:3306/crud?characterEncoding=utf-8"

        userId="root"

        password="q6687015">

    </jdbcConnection>

    <javaTypeResolver >

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

    </javaTypeResolver>

<!-- 指定java bean生成的位置 -->

    <javaModelGenerator

    targetPackage="com.qjp.crud.bean"

    targetProject=".\src\main\java">

      <property name="enableSubPackages" value="true" />

      <property name="trimStrings" value="true" />

    </javaModelGenerator>

<!-- 指定映射文件生成的位置 -->

    <sqlMapGenerator

    targetPackage="com.qjp.crud.mapper" 

    targetProject=".\src\main\java">

      <property name="enableSubPackages" value="true" />

    </sqlMapGenerator>

<!-- 指定dao接口的路径 -->

    <javaClientGenerator type="XMLMAPPER"

    targetPackage="com.qjp.crud.mapper" 

    targetProject=".\src\main\java">

      <property name="enableSubPackages" value="true" />

    </javaClientGenerator>

<!-- 指定每个表的生成策略 -->

    <table  tableName="tbl_dept" domainObjectName="dept" ></table>

    <table  tableName="tbl_emp" domainObjectName="emp" ></table>

  </context>

</generatorConfiguration>

'''

这里主要是编写pojo，mapper映射文件，dao的接口对应生成的位置，以及数据库表的生成策略。

5.基于java程序驱动运行MyBatis Generator：

新建一个java程序编写驱动程序

'''

package com.qjp.crud.test;

import java.io.File;

import java.io.IOException;

import java.sql.SQLException;

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.InvalidConfigurationException;

import org.mybatis.generator.exception.XMLParserException;

import org.mybatis.generator.internal.DefaultShellCallback;

public class Mybatisgenerator {

public static void main(String[] args) throws IOException, XMLParserException, InvalidConfigurationException, SQLException, InterruptedException {

// TODO Auto-generated method stub

List<String> warnings = new ArrayList<String>();

  boolean overwrite = true;

  File configFile = new File("bgm.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);

}

}

'''

编写参考：http://www.mybatis.org/generator/running/running.html