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查询所有用户信息 通过Id查询用户信息 添加用户#xff08;回显主键#xff09; 修改用户信息 删除用户信息 通过用户名字模糊查询
一、引入依赖和工程结构 ?xml version1.0 encodingUTF-8?
project xmlnshttp…项目实现的功能
查询所有用户信息 通过Id查询用户信息 添加用户回显主键 修改用户信息 删除用户信息 通过用户名字模糊查询
一、引入依赖和工程结构 ?xml version1.0 encodingUTF-8?
project xmlnshttp://maven.apache.org/POM/4.0.0xmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsdmodelVersion4.0.0/modelVersiongroupIdcom.william/groupIdartifactIdMybatisCRUD/artifactIdversion1.0-SNAPSHOT/versionpropertiesmaven.compiler.source1.8/maven.compiler.sourcemaven.compiler.target1.8/maven.compiler.target/propertiesdependenciesdependencygroupIdmysql/groupIdartifactIdmysql-connector-java/artifactIdversion5.1.47/version/dependencydependencygroupIdorg.mybatis/groupIdartifactIdmybatis/artifactIdversion3.4.5/version/dependencydependencygroupIdjunit/groupIdartifactIdjunit/artifactIdversion4.12/version/dependencydependencygroupIdlog4j/groupIdartifactIdlog4j/artifactIdversion1.2.17/version/dependency/dependencies/project二、创建实体类
User
package com.william.domain;import java.util.Date;/*** author lijunxuan* date Created in 2019/7/9 19:28* description * version: 1.0*/
public class User {private Integer id;private String username;private String password;private String sex;private Date birthday;Overridepublic String toString() {return User{ id id , username username \ , password password \ , sex sex \ , birthday birthday };}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday birthday;}public Integer getId() {return id;}public void setId(Integer id) {this.id id;}public String getUsername() {return username;}public void setUsername(String username) {this.username username;}public String getPassword() {return password;}public void setPassword(String password) {this.password password;}public String getSex() {return sex;}public void setSex(String sex) {this.sex sex;}}
三、映射文件
1.UserMapper.xml
?xml version1.0 encodingUTF-8 ?
!DOCTYPE mapperPUBLIC -//mybatis.org//DTD Mapper 3.0//ENhttp://mybatis.org/dtd/mybatis-3-mapper.dtd
mapper namespacecom.william.mapper.UserMapper!--查询所有用户信息--select idfindAll resultTypecom.william.domain.Userselect * from user/select!--通过ID查询用户信息--select idfindById parameterTypejava.lang.Integer resultTypecom.william.domain.Userselect * from user where id#{id}/select!--模糊查询--select idfindByUsername parameterTypejava.lang.String resultTypecom.william.domain.Userselect * from user where username like %#{value}%/select!--增加用户信息--insert idinsert parameterTypecom.william.domain.User-- 主键回显selectKey resultTypejava.lang.Integer keyColumnid keyPropertyid orderAFTER select last_insert_id()/selectKeyinsert into user values (null ,#{username},#{password},#{sex},#{birthday})/insert!--更新用户信息--update idupdate parameterTypecom.william.domain.Userupdate user set username#{username},password#{password},sex#{sex},birthday#{birthday} where id#{id}/update!--删除用户信息--delete iddelete parameterTypejava.lang.Integerdelete from user where id #{id}/delete
/mapper2.Mybatis-configuration.xml
?xml version1.0 encodingUTF-8 ?
!DOCTYPE configurationPUBLIC -//mybatis.org//DTD Config 3.0//ENhttp://mybatis.org/dtd/mybatis-3-config.dtd
configurationenvironments defaultdevelopmentenvironment iddevelopmenttransactionManager typeJDBC/dataSource typePOOLEDproperty namedriver valuecom.mysql.jdbc.Driver/property nameurl valuejdbc:mysql://localhost:3306/web02/property nameusername valueroot/property namepassword valueroot//dataSource/environment/environmentsmappersmapper resourcecom/william/mapper/UserMapper.xml//mappers
/configuration四、引入log4j
log4j.properties
# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategoryINFO, CONSOLE debug info warn error fatal
log4j.rootCategorydebug, CONSOLE, LOGFILE, info# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterpriseFATAL, CONSOLE# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLEorg.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layoutorg.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILEorg.apache.log4j.FileAppender
log4j.appender.LOGFILE.Filed:\axis.log
log4j.appender.LOGFILE.Appendtrue
log4j.appender.LOGFILE.layoutorg.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n
五、测试类
TestMybatis
package com.william;
import com.william.domain.User;
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.junit.Test;
import java.io.InputStream;
import java.util.Date;
import java.util.List;
/*** author lijunxuan* date Created in 2019/7/9 19:45* description * version: 1.0*/
public class TestMybatis {/*** 查询所有用户信息*/Testpublic void selectList(){InputStream inputStream Resources.class.getClassLoader().getResourceAsStream(Mybatis-configuration.xml);SqlSessionFactory sqlSessionFactory new SqlSessionFactoryBuilder().build(inputStream);SqlSession sqlSession sqlSessionFactory.openSession();ListUser selectList sqlSession.selectList(com.william.mapper.UserMapper.findAll);for (Object o : selectList) {System.out.println(o);}sqlSession.close();}/***通过Id查询用户信息**/Testpublic void findById(){InputStream inputStream Resources.class.getClassLoader().getResourceAsStream(Mybatis-configuration.xml);SqlSessionFactory sqlSessionFactory new SqlSessionFactoryBuilder().build(inputStream);SqlSession sqlSession sqlSessionFactory.openSession();User selectOne sqlSession.selectOne(com.william.mapper.UserMapper.findById, 43);System.out.println(selectOne.getUsername());sqlSession.close();}/*** 添加用户*/Testpublic void InsertUser(){InputStream inputStream Resources.class.getClassLoader().getResourceAsStream(Mybatis-configuration.xml);SqlSessionFactory sqlSessionFactory new SqlSessionFactoryBuilder().build(inputStream);SqlSession sqlSession sqlSessionFactory.openSession();User user new User();user.setUsername(黑衣人);user.setPassword(123456);user.setSex(男);user.setBirthday(new Date());sqlSession.insert(com.william.mapper.UserMapper.insert,user);//回显刚刚添加用户的IDSystem.out.println(添加之后的主键id为user.getId());sqlSession.commit();sqlSession.close();}/*** 修改用户信息*/Testpublic void UpdateUser(){InputStream inputStream Resources.class.getClassLoader().getResourceAsStream(Mybatis-configuration.xml);SqlSessionFactory sqlSessionFactory new SqlSessionFactoryBuilder().build(inputStream);SqlSession sqlSession sqlSessionFactory.openSession();User user new User();user.setId(43);user.setUsername(黑衣人);user.setPassword(123456);user.setSex(男);user.setBirthday(new Date());sqlSession.update(com.william.mapper.UserMapper.update,user);sqlSession.commit();sqlSession.close();}/*** 删除用户信息*/Testpublic void deleteUser(){InputStream inputStream Resources.class.getClassLoader().getResourceAsStream(Mybatis-configuration.xml);SqlSessionFactory sqlSessionFactory new SqlSessionFactoryBuilder().build(inputStream);SqlSession sqlSession sqlSessionFactory.openSession();sqlSession.delete(com.william.mapper.UserMapper.delete,42);sqlSession.commit();sqlSession.close();}/*** 模糊查询* 通过用户名字模糊查询*/Testpublic void findByUsername(){InputStream inputStream Resources.class.getClassLoader().getResourceAsStream(Mybatis-configuration.xml);SqlSessionFactory sqlSessionFactory new SqlSessionFactoryBuilder().build(inputStream);SqlSession sqlSession sqlSessionFactory.openSession();ListUser selectList sqlSession.selectList(com.william.mapper.UserMapper.findByUsername,a);for (Object o : selectList) {System.out.println(o);}sqlSession.close();}
}
