SSM+Maven整合時在Eclipse中使用Mybatis逆向工程自動生成程式碼
阿新 • • 發佈:2018-12-24
場景
MybatisGenerator 官方文件
http://www.mybatis.org/generator/configreference/xmlconfig.html
實現
專案搭建好完整的包,包括bean、dao、service、test、utils、mapper
專案目錄
此為生成完程式碼之後的目錄
資料庫配置
在資料庫ssm_crud中新建表tbl_emp(員工表)
再新建tbl_dept表(部門表)
兩個表建立外來鍵關聯
逆向工程
首先需要引入逆向工程相關依賴
開啟Maven中央倉庫,搜尋mybatis generator
點進去,選擇1.3.7版本
將其複製到pom.xml中
程式碼為:
<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core --> <!-- MBG --> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.7</version> </dependency>
根據官方文件說明
需要一個配置檔案,在與pom.xml同級目錄下我們新建mbg.xml,用於配置逆向工程。
官方例項文件:
<?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> <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>
這裡具體的配置檔案內筒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>
<context id="DB2Tables" targetRuntime="MyBatis3">
<!-- 設定生成的程式碼不帶註釋 為true時則不帶那麼多註釋-->
<commentGenerator>
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- 配置資料庫連線 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/ssm_crud" userId="root"
password="123">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 將下面的位置改成自己的包名以及位置 -->
<!-- 指定javaBean生成的位置 -->
<javaModelGenerator targetPackage="com.badao.ssm.bean"
targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!--指定sql對映檔案生成的位置 -->
<sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 指定dao介面生成的位置,mapper介面 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.badao.ssm.dao" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- table指定每個表的生成策略 -->
<!-- tableName 對應資料庫中的表名,domainObjectName對應要生成的實體類的類名 -->
<table tableName="tbl_emp" domainObjectName="Employee"></table>
<table tableName="tbl_dept" domainObjectName="Department"></table>
</context>
</generatorConfiguration>
生成程式碼
根據官方文件說明,選擇Running Mybatis Generator With Java
官方示例:
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
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);
在test包下新建MBGTest.java,用於生成程式碼
package com.badao.ssm.test;
import java.io.File;
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.internal.DefaultShellCallback;
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);
}
}
執行
右鍵run as Java Application,選中專案,右鍵refresh,重新整理,可以看到相應程式碼已經生成。
原始碼下載
https://download.csdn.net/download/badao_liumang_qizhi/10868928