【SSM-MyBatis框架】逆向工程
阿新 • • 發佈:2019-01-26
1.逆向工程:(會用即可)
mybatis需要程式設計師自己定義sql語句,mybatis官網提供逆向工程,可以針對表單自動生成mybatis執行所需的Java程式碼(pojo、mapper.java、mapper.xml)
2.使用方法:
1.工程目錄:
2.配置檔案(generatorConfig.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="testTables" targetRuntime="MyBatis3"> <commentGenerator> <!-- 是否去除自動生成的註釋 true:是 : false:否 --> <property name="suppressAllComments" value="true" /> </commentGenerator> <!--資料庫連線的資訊:驅動類、連線地址、使用者名稱、密碼 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/mybatis" userId="root" password="123456"> </jdbcConnection> <!-- <jdbcConnection driverClass="oracle.jdbc.OracleDriver" connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:yycg" userId="yycg" password="yycg"> </jdbcConnection> --> <!-- 預設false,把JDBC DECIMAL 和 NUMERIC 型別解析為 Integer,為 true時把JDBC DECIMAL 和 NUMERIC 型別解析為java.math.BigDecimal --> <javaTypeResolver> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!-- targetProject:生成PO類的位置 --> <javaModelGenerator targetPackage="cn.edu.hpu.ssm.po" targetProject=".\src"> <!-- enableSubPackages:是否讓schema作為包的字尾 --> <property name="enableSubPackages" value="false" /> <!-- 從資料庫返回的值被清理前後的空格 --> <property name="trimStrings" value="true" /> </javaModelGenerator> <!-- targetProject:mapper對映檔案生成的位置 --> <sqlMapGenerator targetPackage="cn.edu.hpu.ssm.mapper" targetProject=".\src"> <!-- enableSubPackages:是否讓schema作為包的字尾 --> <property name="enableSubPackages" value="false" /> </sqlMapGenerator> <!-- targetPackage:mapper介面生成的位置 --> <javaClientGenerator type="XMLMAPPER" targetPackage="cn.edu.hpu.ssm.mapper" targetProject=".\src"> <!-- enableSubPackages:是否讓schema作為包的字尾 --> <property name="enableSubPackages" value="false" /> </javaClientGenerator> <!-- 指定資料庫表 --> <table tableName="items"></table> <table tableName="orders"></table> <table tableName="orderdetail"></table> <table tableName="user"></table> </context> </generatorConfiguration>
3.逆向工程的執行程式碼(Generator.java):
package cn.edu.hpu.ssm.generator; 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 Generator { public void generator() throws Exception{ List<String> warnings = new ArrayList<String>(); boolean overwrite = true; File configFile = new File("config/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 { Generator generatorSqlmap = new Generator(); generatorSqlmap.generator(); } catch (Exception e) { e.printStackTrace(); } } }
4. 最終生成的程式碼: