MyBatis逆向工程

MyBatis逆向工程

注意事项 首次运行时不要使用相对路径

1.创建空工程 创建模块(因为是Dao层普通mevan项目模块即可)

2.引入坐标

    <dependencies>
        <dependency>
            <groupId>org.mybatis.generatorgroupId>
            <artifactId>mybatis-generator-coreartifactId>
            <version>1.3.7version>
        dependency>
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>5.1.6version>
        dependency>
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatisartifactId>
            <version>3.4.5version>
        dependency>
    dependencies>

3.写入配置文件

jdbc.properties jdbc.path 要引入jar包得正确位置 斜线出 要加转义符

jdbc.path=D:\\ruanjian\\apache-maven-3.5.4-bin\\repository\\mysql\\mysql-connector-java\\5.1.6
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/saas-export-ee88
jdbc.username=root
jdbc.password=root

mybatis-generator-config.xml
也可以去 http://www.mybatis.org/generator/configreference/xmlconfig.html 粘贴

<generatorConfiguration>
    
    <properties resource="jdbc.properties">properties>
    
    <classPathEntry location="${jdbc.path}"/>

    <context id="context" targetRuntime="MyBatis3">
        
        <commentGenerator>
            <property name="suppressAllComments" value="false"/>
            <property name="suppressDate" value="true"/>
        commentGenerator>

        
        <jdbcConnection driverClass="${jdbc.driver}"
                        connectionURL="${jdbc.url}"
                        userId="${jdbc.username}"
                        password="${jdbc.password}"/>
        
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        javaTypeResolver>

        
        <javaModelGenerator targetPackage="com.itheima.domain.cargo" targetProject="I:\ee88\mybatis_demo\mybatis_generator\src\main\java">
            
            <property name="enableSubPackages" value="false"/>
            
            <property name="trimStrings" value="true"/>
        javaModelGenerator>

        
        <sqlMapGenerator targetPackage="com.itheima.dao.cargo" targetProject="I:\ee88\mybatis_demo\mybatis_generator\src\main\resources">
            
            <property name="enableSubPackages" value="false"/>
        sqlMapGenerator>

        
        <javaClientGenerator targetPackage="com.itheima.dao.cargo"
                             targetProject="I:\ee88\mybatis_demo\mybatis_generator\src\main\java" type="XMLMAPPER">
            
            <property name="enableSubPackages" value="false"/>
        javaClientGenerator>


        




        <table schema="saas-export-ee88" tableName="co_factory" domainObjectName="Factory" mapperName="FactoryDao"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="true" enableUpdateByExample="false"/>
    context>
generatorConfiguration>

4 创建Test 进行操作 生成文件 (逆向创建)

http://www.mybatis.org/generator/running/runningWithJava.html 可以查看 粘贴

package com.itheima.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.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 *
 */
public class GeneratorSqlMapTest {

    public void generator() throws Exception{

        List warnings = new ArrayList();
        boolean overwrite = true;
        //指定 逆向工程配置文件
        InputStream in = GeneratorSqlMapTest.class.getClassLoader().getResourceAsStream("mybatis-generator-config.xml");
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(in);
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
                callback, warnings);
        myBatisGenerator.generate(null);
        in.close();

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

    }

}

特例查询

这些生成后 就可以导入需要使用得项目了 也可以项目中直接生成使用

提供了简单测试 以及 使用方法

package com.itheima.dao.test;

import com.itheima.dao.cargo.FactoryDao;
import com.itheima.domain.cargo.Factory;
import com.itheima.domain.cargo.FactoryExample;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring/applicationContext-*.xml")
public class FactoryDaoTest {
    @Autowired
    private FactoryDao factoryDao;
    @Test
    public void test01(){
              //1.创建例子
        FactoryExample factoryExample = new FactoryExample();
        //2创建例子中得条件对象   传入参数 条件查询
        FactoryExample.Criteria criteria = factoryExample.createCriteria();
        //3设置查询条件   没有条件 这两行不写
        criteria.andCtypeEqualTo("货物");
        //4.加入排序
       factoryExample.setOrderByClause("create_time desc");
        //查询全部
        List<Factory> factories = factoryDao.selectByExample(factoryExample);
        System.out.println(factories.get(0).getCreateTime());
    }
}