逆向工程可以快速将数据库的表生成JavaBean，同时生成对单标操作的Mapper.java与Mapper.xml，极大地提高了开发速度。
1.jar包
2.配置文件
需要修改数据库连接信息，mapper生成目录与pojo生成位置，也要修改要导出的表。
工程目录下配置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/exam" 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> --> <!-- 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="cn.xm.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="cn.xm.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="cn.xm.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 tableName="blacklist"></table> <table tableName="breakrules"></table> <table tableName="checkrecord"></table> <table tableName="department"></table> <table tableName="dictionary"></table> <table tableName="employee_in"></table> <table tableName="employee_out"></table> <table tableName="employeeexam"></table> <table tableName="exam"></table> <table tableName="exampaper"></table> <table tableName="historypaperoption"></table> <table tableName="historypaperquestion"></table> <table tableName="newsrecord"></table> <table tableName="onlineexamanswerinfor"></table> <table tableName="onlineexaminfor"></table> <table tableName="options"></table> <table tableName="permission"></table> <table tableName="pictureindex"></table> <table tableName="project"></table> <table tableName="questionbank"></table> <table tableName="questions"></table> <table tableName="role"></table> <table tableName="rolepermission"></table> <table tableName="traincontent"></table> <table tableName="unit"></table> <table tableName="unitproject"></table> <table tableName="userrole"></table> </context> </generatorConfiguration>
3. Java程序
1 package mybatisInverse; 2 import java.io.File; 3 import java.util.ArrayList; 4 import java.util.List; 5 import org.mybatis.generator.api.MyBatisGenerator; 6 import org.mybatis.generator.config.Configuration; 7 import org.mybatis.generator.config.xml.ConfigurationParser; 8 import org.mybatis.generator.internal.DefaultShellCallback; 9 10 public class GeneratorSqlmap 11 { 12 public void generator() 13 throws Exception 14 { 15 List<String> warnings = new ArrayList(); 16 boolean overwrite = true; 17 18 File configFile = new File("generatorConfig.xml"); 19 ConfigurationParser cp = new ConfigurationParser(warnings); 20 Configuration config = cp.parseConfiguration(configFile); 21 DefaultShellCallback callback = new DefaultShellCallback(overwrite); 22 MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, 23 callback, warnings); 24 myBatisGenerator.generate(null); 25 } 26 27 public static void main(String[] args) 28 throws Exception 29 { 30 try 31 { 32 GeneratorSqlmap generatorSqlmap = new GeneratorSqlmap(); 33 generatorSqlmap.generator(); 34 } 35 catch (Exception e) 36 { 37 e.printStackTrace(); 38 } 39 } 40 }
运行结果:
4.使用生成的代码:
对单表操作较方便，可以自定义条件查询。
sqlMapConfig.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!-- 加载属性文件 --> <properties resource="db.properties"> <!--properties中还可以配置一些属性名和属性值 --> <!-- <property name="jdbc.driver" value=""/> --> </properties> <!-- 全局配置参数，需要时再设置 --> <!-- <settings> </settings> --> <!-- 别名定义 --> <typeAliases> <!-- 针对单个别名定义 type：类型的路径 alias：别名 --> <!-- <typeAlias type="cn.itcast.mybatis.po.User" alias="user"/> --> <!-- 批量别名定义 指定包名，mybatis自动扫描包中的po类，自动定义别名，别名就是类名（首字母大写或小写都可以） --> <package name="cn.xm.pojo"/> </typeAliases> <!-- 和spring整合后 environments配置将废除--> <environments default="development"> <environment id="development"> <!-- 使用jdbc事务管理，事务控制由mybatis--> <transactionManager type="JDBC" /> <!-- 数据库连接池，由mybatis管理--> <dataSource type="POOLED"> <property name="driver" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> </dataSource> </environment> </environments> <!-- 加载 映射文件 --> <mappers> <!--通过resource方法一次加载一个映射文件 --> <!-- <mapper resource="mapper/UserMapper.xml"/> --> <!-- 通过mapper接口加载单个 映射文件 遵循一些规范：需要将mapper接口类名和mapper.xml映射文件名称保持一致，且在一个目录 中 上边规范的前提是：使用的是mapper代理方法 --> <!-- <mapper class="cn.itcast.mybatis.mapper.UserMapper"/> --> <!-- 批量加载mapper 指定mapper接口的包名，mybatis自动扫描包下边所有mapper接口进行加载 遵循一些规范：需要将mapper接口类名和mapper.xml映射文件名称保持一致，且在一个目录 中 上边规范的前提是：使用的是mapper代理方法 --> <package name="cn.xm.mapper"/> </mappers> </configuration>
java代码:
package cn.xm.test; import java.io.InputStream; import java.net.URL; import java.util.Date; import java.util.List; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import org.apache.tomcat.jdbc.pool.interceptor.SlowQueryReportJmxMBean; import org.junit.Before; import org.junit.Test; import cn.xm.mapper.EmployeeInMapper; import cn.xm.pojo.EmployeeIn; import cn.xm.pojo.EmployeeInExample; public class MybatisTest { private SqlSessionFactory sqlSessionFactory; @Before public void setUp() throws Exception { // 将全局配置文件作为一个流 String resource = "sqlMapConfig.xml"; URL realPath2 = Resources.getResourceURL("sqlMapConfig.xml"); InputStream inputStream = Resources.getResourceAsStream(resource); // 建立一个SqlSession工厂 sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); } // 测试增加 @Test public void testAdd() throws Exception { SqlSession sqlSession = sqlSessionFactory.openSession(); EmployeeInMapper eim = sqlSession.getMapper(EmployeeInMapper.class); EmployeeIn sl = new EmployeeIn(); sl.setIdcode("33"); sl.setEmployeeid("3"); sl.setEmployeenumber("3"); sl.setPassword("33333"); ; sl.setName("王五"); eim.insert(sl); sqlSession.commit(); sqlSession.close(); } // 测试删除 @Test public void testDeleteById() throws Exception { SqlSession sqlSession = sqlSessionFactory.openSession(); EmployeeInMapper eim = sqlSession.getMapper(EmployeeInMapper.class); eim.deleteByPrimaryKey("3"); sqlSession.commit(); sqlSession.close(); } // 测试修改 @Test public void fun2() throws Exception { SqlSession sqlSession = sqlSessionFactory.openSession(); EmployeeInMapper eim = sqlSession.getMapper(EmployeeInMapper.class); EmployeeIn selectByPrimaryKey = eim.selectByPrimaryKey("3"); selectByPrimaryKey.setName("这是修改后的值"); eim.updateByPrimaryKey(selectByPrimaryKey); sqlSession.commit(); sqlSession.close(); } // 测试通过id查询单个 @Test public void fun3() throws Exception { SqlSession sqlSession = sqlSessionFactory.openSession(); EmployeeInMapper eim = sqlSession.getMapper(EmployeeInMapper.class); EmployeeIn selectByPrimaryKey = eim.selectByPrimaryKey("3"); System.out.println(selectByPrimaryKey); } // 自定义条件查询 查询名字为张三的 @Test public void testSelectByExample() { SqlSession sqlSession = sqlSessionFactory.openSession(); EmployeeInMapper eim = sqlSession.getMapper(EmployeeInMapper.class); EmployeeInExample employeeInExample = new EmployeeInExample(); // 通过criteria构造查询条件 EmployeeInExample.Criteria criteria = employeeInExample.createCriteria(); criteria.andNameEqualTo("张三"); // 可能返回多条记录 List<EmployeeIn> list = eim.selectByExample(employeeInExample); System.out.println(list); } // 自定义条件查询 查询名字为张三的且password为44444的 @Test public void testSelectByExample1() { SqlSession sqlSession = sqlSessionFactory.openSession(); EmployeeInMapper eim = sqlSession.getMapper(EmployeeInMapper.class); EmployeeInExample employeeInExample = new EmployeeInExample(); // 通过criteria构造查询条件 EmployeeInExample.Criteria criteria = employeeInExample.createCriteria(); criteria.andNameEqualTo("张三"); criteria.andPasswordEqualTo("44444"); // 可能返回多条记录 List<EmployeeIn> list = eim.selectByExample(employeeInExample); System.out.println(list); } // 自定义条件查询 查询所有，只是不封装条件 @Test public void testSelectByExample3() { SqlSession sqlSession = sqlSessionFactory.openSession(); EmployeeInMapper eim = sqlSession.getMapper(EmployeeInMapper.class); EmployeeInExample employeeInExample = new EmployeeInExample(); // 通过criteria构造查询条件 EmployeeInExample.Criteria criteria = employeeInExample.createCriteria(); // 可能返回多条记录 List<EmployeeIn> list = eim.selectByExample(employeeInExample); System.out.println(list); } }
补充:今天我同学问我如何用Criteria去执行类似于or的语句，例如:select * from user where usercode="lll" or password="lll"
经过网上查阅资料发现是重新再构造一个criteria，并手动注入到example中：
@Test public void test1(){ UserExample userExample = new UserExample(); UserExample.Criteria criteria_1 = userExample.createCriteria(); criteria_1.andUsercodeEqualTo("111"); UserExample.Criteria criteria_2 = userExample.createCriteria(); criteria_2.andPasswordEqualTo("111"); userExample.or(criteria_2); List<User> users = userMapper.selectByExample(userExample); for(User u:users){ System.out.println("--------------------SSSSSSSSSSSSSSSSSSSSSSSSS------------"+u); } }
查看日志:
16:37:15,550 DEBUG selectByExample:132 - ==> Preparing: select userID, userCode, userName, password, userSort, remark2 from user WHERE ( userCode = ? ) or( password = ? )
16:37:15,622 DEBUG selectByExample:132 - ==> Parameters: 111(String), 111(String)
另外逆向工程导出的mapper还可以设置排序和distinct
public void test1(){ UserExample userExample = new UserExample(); /*封装查询条件*/ UserExample.Criteria criteria_1 = userExample.createCriteria(); criteria_1.andUsercodeEqualTo("111"); UserExample.Criteria criteria_2 = userExample.createCriteria(); criteria_2.andPasswordEqualTo("111"); userExample.or(criteria_2); /*封装排序(姓名降序-密码升序)*/ userExample.setOrderByClause("username desc,password"); /*是否是distinct*/ userExample.setDistinct(true); List<User> users = userMapper.selectByExample(userExample); for(User u:users){ System.out.println(u); } }
查看日志
16:43:09,575 DEBUG selectByExample:132 - ==> Preparing: select distinct userID, userCode, userName, password, userSort, remark2 from user WHERE ( userCode = ? ) or( password = ? ) order by username desc,password
16:43:09,670 DEBUG selectByExample:132 - ==> Parameters: 111(String), 111(String)
使用逆向工程修改指定的列；
类似于直接修改。
如果调用:
如果某些列为空它也会指控。类似于先删除然后添加。添加后来新的对象。
最后附一个完整的mapper.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <mapper namespace="cn.xm.exam.mapper.trainContent.TraincontentMapper" > <resultMap id="BaseResultMap" type="cn.xm.exam.bean.trainContent.Traincontent" > <id column="documentId" property="documentid" jdbcType="INTEGER" /> <result column="departmentId" property="departmentid" jdbcType="VARCHAR" /> <result column="documentName" property="documentname" jdbcType="VARCHAR" /> <result column="trainType" property="traintype" jdbcType="VARCHAR" /> <result column="departmentName" property="departmentname" jdbcType="VARCHAR" /> <result column="knowledgeType" property="knowledgetype" jdbcType="VARCHAR" /> <result column="originalName" property="originalname" jdbcType="VARCHAR" /> <result column="currentName" property="currentname" jdbcType="VARCHAR" /> <result column="upTime" property="uptime" jdbcType="TIMESTAMP" /> <result column="size" property="size" jdbcType="VARCHAR" /> <result column="employeeName" property="employeename" jdbcType="VARCHAR" /> <result column="level" property="level" jdbcType="VARCHAR" /> <result column="description" property="description" jdbcType="VARCHAR" /> <result column="browseTimes" property="browsetimes" jdbcType="INTEGER" /> </resultMap> <sql id="Example_Where_Clause" > <where > <foreach collection="oredCriteria" item="criteria" separator="or" > <if test="criteria.valid" > <trim prefix="(" suffix=")" prefixOverrides="and" > <foreach collection="criteria.criteria" item="criterion" > <choose > <when test="criterion.noValue" > and ${criterion.condition} </when> <when test="criterion.singleValue" > and ${criterion.condition} #{criterion.value} </when> <when test="criterion.betweenValue" > and ${criterion.condition} #{criterion.value} and #{criterion.secondValue} </when> <when test="criterion.listValue" > and ${criterion.condition} <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," > #{listItem} </foreach> </when> </choose> </foreach> </trim> </if> </foreach> </where> </sql> <sql id="Update_By_Example_Where_Clause" > <where > <foreach collection="example.oredCriteria" item="criteria" separator="or" > <if test="criteria.valid" > <trim prefix="(" suffix=")" prefixOverrides="and" > <foreach collection="criteria.criteria" item="criterion" > <choose > <when test="criterion.noValue" > and ${criterion.condition} </when> <when test="criterion.singleValue" > and ${criterion.condition} #{criterion.value} </when> <when test="criterion.betweenValue" > and ${criterion.condition} #{criterion.value} and #{criterion.secondValue} </when> <when test="criterion.listValue" > and ${criterion.condition} <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," > #{listItem} </foreach> </when> </choose> </foreach> </trim> </if> </foreach> </where> </sql> <sql id="Base_Column_List" > documentId, departmentId, documentName, trainType, departmentName, knowledgeType, originalName, currentName, upTime, size, employeeName, level, description, browseTimes </sql> <select id="selectByExample" resultMap="BaseResultMap" parameterType="cn.xm.exam.bean.trainContent.TraincontentExample" > select <if test="distinct" > distinct </if> <include refid="Base_Column_List" /> from traincontent <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> <if test="orderByClause != null" > order by ${orderByClause} </if> </select> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" > select <include refid="Base_Column_List" /> from traincontent where documentId = #{documentid,jdbcType=INTEGER} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" > delete from traincontent where documentId = #{documentid,jdbcType=INTEGER} </delete> <delete id="deleteByExample" parameterType="cn.xm.exam.bean.trainContent.TraincontentExample" > delete from traincontent <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> </delete> <insert id="insert" parameterType="cn.xm.exam.bean.trainContent.Traincontent" > insert into traincontent (documentId, departmentId, documentName, trainType, departmentName, knowledgeType, originalName, currentName, upTime, size, employeeName, level, description, browseTimes) values (#{documentid,jdbcType=INTEGER}, #{departmentid,jdbcType=VARCHAR}, #{documentname,jdbcType=VARCHAR}, #{traintype,jdbcType=VARCHAR}, #{departmentname,jdbcType=VARCHAR}, #{knowledgetype,jdbcType=VARCHAR}, #{originalname,jdbcType=VARCHAR}, #{currentname,jdbcType=VARCHAR}, #{uptime,jdbcType=TIMESTAMP}, #{size,jdbcType=VARCHAR}, #{employeename,jdbcType=VARCHAR}, #{level,jdbcType=VARCHAR}, #{description,jdbcType=VARCHAR}, #{browsetimes,jdbcType=INTEGER}) </insert> <insert id="insertSelective" parameterType="cn.xm.exam.bean.trainContent.Traincontent" > insert into traincontent <trim prefix="(" suffix=")" suffixOverrides="," > <if test="documentid != null" > documentId, </if> <if test="departmentid != null" > departmentId, </if> <if test="documentname != null" > documentName, </if> <if test="traintype != null" > trainType, </if> <if test="departmentname != null" > departmentName, </if> <if test="knowledgetype != null" > knowledgeType, </if> <if test="originalname != null" > originalName, </if> <if test="currentname != null" > currentName, </if> <if test="uptime != null" > upTime, </if> <if test="size != null" > size, </if> <if test="employeename != null" > employeeName, </if> <if test="level != null" > level, </if> <if test="description != null" > description, </if> <if test="browsetimes != null" > browseTimes, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="documentid != null" > #{documentid,jdbcType=INTEGER}, </if> <if test="departmentid != null" > #{departmentid,jdbcType=VARCHAR}, </if> <if test="documentname != null" > #{documentname,jdbcType=VARCHAR}, </if> <if test="traintype != null" > #{traintype,jdbcType=VARCHAR}, </if> <if test="departmentname != null" > #{departmentname,jdbcType=VARCHAR}, </if> <if test="knowledgetype != null" > #{knowledgetype,jdbcType=VARCHAR}, </if> <if test="originalname != null" > #{originalname,jdbcType=VARCHAR}, </if> <if test="currentname != null" > #{currentname,jdbcType=VARCHAR}, </if> <if test="uptime != null" > #{uptime,jdbcType=TIMESTAMP}, </if> <if test="size != null" > #{size,jdbcType=VARCHAR}, </if> <if test="employeename != null" > #{employeename,jdbcType=VARCHAR}, </if> <if test="level != null" > #{level,jdbcType=VARCHAR}, </if> <if test="description != null" > #{description,jdbcType=VARCHAR}, </if> <if test="browsetimes != null" > #{browsetimes,jdbcType=INTEGER}, </if> </trim> </insert> <select id="countByExample" parameterType="cn.xm.exam.bean.trainContent.TraincontentExample" resultType="java.lang.Integer" > select count(*) from traincontent <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> </select> <update id="updateByExampleSelective" parameterType="map" > update traincontent <set > <if test="record.documentid != null" > documentId = #{record.documentid,jdbcType=INTEGER}, </if> <if test="record.departmentid != null" > departmentId = #{record.departmentid,jdbcType=VARCHAR}, </if> <if test="record.documentname != null" > documentName = #{record.documentname,jdbcType=VARCHAR}, </if> <if test="record.traintype != null" > trainType = #{record.traintype,jdbcType=VARCHAR}, </if> <if test="record.departmentname != null" > departmentName = #{record.departmentname,jdbcType=VARCHAR}, </if> <if test="record.knowledgetype != null" > knowledgeType = #{record.knowledgetype,jdbcType=VARCHAR}, </if> <if test="record.originalname != null" > originalName = #{record.originalname,jdbcType=VARCHAR}, </if> <if test="record.currentname != null" > currentName = #{record.currentname,jdbcType=VARCHAR}, </if> <if test="record.uptime != null" > upTime = #{record.uptime,jdbcType=TIMESTAMP}, </if> <if test="record.size != null" > size = #{record.size,jdbcType=VARCHAR}, </if> <if test="record.employeename != null" > employeeName = #{record.employeename,jdbcType=VARCHAR}, </if> <if test="record.level != null" > level = #{record.level,jdbcType=VARCHAR}, </if> <if test="record.description != null" > description = #{record.description,jdbcType=VARCHAR}, </if> <if test="record.browsetimes != null" > browseTimes = #{record.browsetimes,jdbcType=INTEGER}, </if> </set> <if test="_parameter != null" > <include refid="Update_By_Example_Where_Clause" /> </if> </update> <update id="updateByExample" parameterType="map" > update traincontent set documentId = #{record.documentid,jdbcType=INTEGER}, departmentId = #{record.departmentid,jdbcType=VARCHAR}, documentName = #{record.documentname,jdbcType=VARCHAR}, trainType = #{record.traintype,jdbcType=VARCHAR}, departmentName = #{record.departmentname,jdbcType=VARCHAR}, knowledgeType = #{record.knowledgetype,jdbcType=VARCHAR}, originalName = #{record.originalname,jdbcType=VARCHAR}, currentName = #{record.currentname,jdbcType=VARCHAR}, upTime = #{record.uptime,jdbcType=TIMESTAMP}, size = #{record.size,jdbcType=VARCHAR}, employeeName = #{record.employeename,jdbcType=VARCHAR}, level = #{record.level,jdbcType=VARCHAR}, description = #{record.description,jdbcType=VARCHAR}, browseTimes = #{record.browsetimes,jdbcType=INTEGER} <if test="_parameter != null" > <include refid="Update_By_Example_Where_Clause" /> </if> </update> <update id="updateByPrimaryKeySelective" parameterType="cn.xm.exam.bean.trainContent.Traincontent" > update traincontent <set > <if test="departmentid != null" > departmentId = #{departmentid,jdbcType=VARCHAR}, </if> <if test="documentname != null" > documentName = #{documentname,jdbcType=VARCHAR}, </if> <if test="traintype != null" > trainType = #{traintype,jdbcType=VARCHAR}, </if> <if test="departmentname != null" > departmentName = #{departmentname,jdbcType=VARCHAR}, </if> <if test="knowledgetype != null" > knowledgeType = #{knowledgetype,jdbcType=VARCHAR}, </if> <if test="originalname != null" > originalName = #{originalname,jdbcType=VARCHAR}, </if> <if test="currentname != null" > currentName = #{currentname,jdbcType=VARCHAR}, </if> <if test="uptime != null" > upTime = #{uptime,jdbcType=TIMESTAMP}, </if> <if test="size != null" > size = #{size,jdbcType=VARCHAR}, </if> <if test="employeename != null" > employeeName = #{employeename,jdbcType=VARCHAR}, </if> <if test="level != null" > level = #{level,jdbcType=VARCHAR}, </if> <if test="description != null" > description = #{description,jdbcType=VARCHAR}, </if> <if test="browsetimes != null" > browseTimes = #{browsetimes,jdbcType=INTEGER}, </if> </set> where documentId = #{documentid,jdbcType=INTEGER} </update> <update id="updateByPrimaryKey" parameterType="cn.xm.exam.bean.trainContent.Traincontent" > update traincontent set departmentId = #{departmentid,jdbcType=VARCHAR}, documentName = #{documentname,jdbcType=VARCHAR}, trainType = #{traintype,jdbcType=VARCHAR}, departmentName = #{departmentname,jdbcType=VARCHAR}, knowledgeType = #{knowledgetype,jdbcType=VARCHAR}, originalName = #{originalname,jdbcType=VARCHAR}, currentName = #{currentname,jdbcType=VARCHAR}, upTime = #{uptime,jdbcType=TIMESTAMP}, size = #{size,jdbcType=VARCHAR}, employeeName = #{employeename,jdbcType=VARCHAR}, level = #{level,jdbcType=VARCHAR}, description = #{description,jdbcType=VARCHAR}, browseTimes = #{browsetimes,jdbcType=INTEGER} where documentId = #{documentid,jdbcType=INTEGER} </update> </mapper>
附一个测试工程的下载地址: http://qiaoliqiang.cn/fileDown/MybatisInverse.zip
【当你用心写完每一篇博客之后,你会发现它比你用代码实现功能更有成就感!】
