MBG代码生成

最新推荐文章于 2024-02-25 13:06:41 发布

梁国文

最新推荐文章于 2024-02-25 13:06:41 发布

阅读量736

点赞数

分类专栏： mybatis

本文链接：https://blog.youkuaiyun.com/lgw_999/article/details/78755086

版权

mybatis 专栏收录该内容

3 篇文章

订阅专栏

1.使用maven生成代码

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

pom.xml文件

<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>MBG</groupId>
  <artifactId>MBG</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <name/>
  <description/>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <build>
  	<plugins>
  		<plugin>
      	  <groupId>org.mybatis.generator</groupId>
      	  <artifactId>mybatis-generator-maven-plugin</artifactId>
          <version>1.3.5</version>
          <configuration>
          	<configurationFile>src/main/java/mbg.xml</configurationFile>
          </configuration>
        </plugin>
  	</plugins>
  </build>
</project>

配置的xml文件

<?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>
  <!-- 生成代码 需要一些步骤
        1  连接数据库 （驱动包 四要素）
   -->
  <classPathEntry location="H:\lib\mysql-connector-java-5.1.13-bin.jar" />
  <!-- 设置生成代码的规则
          targetRuntime开发环境使用Mybatis的版本
     -->
  <context id="DB2Tables" targetRuntime="MyBatis3">
  	<plugin type="org.mybatis.generator.plugins.RowBoundsPlugin"></plugin>
     <!-- 配置连接mysql四要素 -->
    <jdbcConnection driverClass="com.mysql.jdbc.Driver"
        connectionURL="jdbc:mysql://localhost:3306/food"
        userId="root"
        password="123">
    </jdbcConnection>

    <javaTypeResolver >
      <property name="forceBigDecimals" value="false" />
    </javaTypeResolver>
    <!-- 实体类 bean 带有get和set方法的bean -->
    <javaModelGenerator targetPackage="cn.et.entity" targetProject="src/main/java">
      <property name="enableSubPackages" value="true" />
      <property name="trimStrings" value="true" />
    </javaModelGenerator>
	<!-- sql语句相关的xml或者注解的生成包路径 -->
    <sqlMapGenerator targetPackage="cn.et.dao"  targetProject="src/main/java">
      <property name="enableSubPackages" value="true" />
    </sqlMapGenerator>
    <!-- 生成的接口所在位置 type="ANNOTATEDMAPPER"生成注解开发代码 type="XMLMAPPER"生成相对应的xml文件--> 
    <javaClientGenerator type="ANNOTATEDMAPPER" targetPackage="cn.et.dao"  targetProject="src/main/java">
   	<!-- enableSubPackages:是否让schema作为包的后缀 -->
      <property name="enableSubPackages" value="true" />
    </javaClientGenerator>
    <!-- 告诉mbg 需要生成代码的表 -->
    <table tableName="student"  >
    </table>
    
  </context>
</generatorConfiguration>

如果是myeclipse生成是就会出现一个的错误

maven运行方式

mybatis-generator:generate

2.使用java代码生成

<?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/store" userId="root"
			password="123">
		</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.et.pojo"
			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.et.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.et.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="tb_content"></table>
		<table schema="" tableName="tb_content_category"></table>
		<table schema="" tableName="tb_item"></table>
		<table schema="" tableName="tb_item_cat"></table>
		<table schema="" tableName="tb_item_desc"></table>
		<table schema="" tableName="tb_item_param"></table>
		<table schema="" tableName="tb_item_param_item"></table>
		<table schema="" tableName="tb_order"></table>
		<table schema="" tableName="tb_order_item"></table>
		<table schema="" tableName="tb_order_shipping"></table>
		<table schema="" tableName="tb_user"></table>

	</context>
</generatorConfiguration>

运行此方法

import java.io.File;
import java.io.IOException;
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 GeneratorSqlmap {

	public void generator() throws Exception{

		List<String> warnings = new ArrayList<String>();
		boolean overwrite = true;
		//指定 逆向工程配置文件
		File configFile = new File("generatorConfig.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 {
			GeneratorSqlmap generatorSqlmap = new GeneratorSqlmap();
			generatorSqlmap.generator();
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}

}

目录结构