利用mybatis的mybatis-generator从表生成xml文件和实体类

最新推荐文章于 2022-08-20 05:15:47 发布

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最新推荐文章于 2022-08-20 05:15:47 发布

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博客介绍了在完成配置文件编写后，于mybatis-generator-core-1.3.6.jar同级目录执行编译命令，可实现由表生成实体类和xml的mapper文件，还提到了使用test利用maven执行相关操作。

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注解

type="XMLMAPPER" 是xml方式
type="ANNOTATEDMAPPER" 是注解方式

更新一直返回条数
使用 useGeneratedKeys="true"、keyProperty="id" 
或者在table标签里
 <generatedKey column="id" sqlStatement="Mysql" identity="true"/>
 插入时会将插入的数据的id封装到对象里，否则返回插入的条数
生成的方法如下

    @InsertProvider(type=FlowVersionSqlProvider.class, method="insertSelective")
    @SelectKey(statement="SELECT LAST_INSERT_ID()", keyProperty="flowVersionId", before=false, resultType=Integer.class)
    int insertSelective(FlowVersion record);

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>
    <context id="MySQL2Tables" targetRuntime="MyBatis3" defaultModelType="flat">
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>
        <property name="javaFileEncoding" value="utf-8"/>

        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>
        <plugin type="org.mybatis.generator.plugins.ToStringPlugin"/>

        <commentGenerator>
            <property name="suppressAllComments" value="false"/>
            <property name="suppressDate" value="true"/>
        </commentGenerator>

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL=""
                        userId=""
                        password="" >
        </jdbcConnection>

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

        <javaModelGenerator targetPackage="com.model"
                            targetProject="src/main/java">
            <property name="enableSubPackages" value="false"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources">
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>
        <javaClientGenerator targetPackage="com.mapper"
                             targetProject="src/main/java" type="XMLMAPPER">
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>

        <table tableName="ou_info" domainObjectName="OuInfo" enableCountByExample="true" enableUpdateByExample="true"
               enableDeleteByExample="true" enableSelectByExample="true" selectByExampleQueryId="true" delimitAllColumns="true">
            <property name="useActualColumnNames" value="false"/>
            加上下面这句会把id封装到对象之中 id是表的主键
            <generatedKey column="id" sqlStatement="Mysql" identity="true"/>
        </table>
    </context>
</generatorConfiguration>

执行编译命令
完成配置文件的编写后，在mybatis-generator-core-1.3.6.jar同级目录，执行编译命令，就可以轻松完成又表生成实体类和xml的mapper文件啦。命令如下

java -jar mybatis-generator-core-1.3.6.jar -configfile generatorConfig.xml -overwrite

pom

 <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.6</version>
        </dependency>

使用test利用maven执行

package com;

import org.junit.Test;
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;

import java.io.File;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * @author hongtao.hao
 * @date 2019/5/21
 */
public class MyBatisGeneratorTest {

    @Test
    public void test() throws IOException, XMLParserException, InvalidConfigurationException, SQLException, InterruptedException, SQLException {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        File configFile =new File(this.getClass().getResource("/mybatis-generator/generatorConfig.xml").getFile());
        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);
    }

}