Spring整合Mybatis附加实现案例
前言
本文围绕Spring整合Mybatis，实现用户的登陆验证java
1、环境搭建
1.使用环境
JDK 11 MySQL 8 Maven 3.6.3
2.pom.xml配置（所需依赖，资源导入）
<dependencies>
<!--单元测试-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!--包含 spring 核心包-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<!--c3p0-->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</version>
</dependency>
<!--mysql驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.19</version>
</dependency>
<!--mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.2</version>
</dependency>
<!-- mybatis与spring整合的jar包-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.3</version>
</dependency>
<!--日志-->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!--aop-->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.9</version>
</dependency>
<!--jdk11以上版本javax.annotation.Resource不存在，须要手动引入后才能使用@Resource注解-->
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>javax.annotation-api</artifactId>
<version>1.2</version>
</dependency>
<!--spring-jdbc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.10</version>
</dependency>
</dependencies>
<build>
<!--资源导入问题-->
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
<include>**/*.properties</include>
<include>**/*.tld</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
3.properties文件
db.properties
注：MySQL 8 须要添加时区设置mysql
jdbc.driver=com.mysql.cj.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false jdbc.username=root jdbc.password=125803
log4j.propertiesweb
#将等级为DEBUG的日志信息输出到console和file这两个目的地，console和file的定义在下面的代码
log4j.rootLogger=DEBUG,console,file
#控制台输出的相关设置
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
log4j.appender.console.Threshold=DEBUG
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=[%c]-%m%n
#文件输出的相关设置
log4j.appender.file = org.apache.log4j.RollingFileAppender
log4j.appender.file.File=./log/test.log
log4j.appender.file.MaxFileSize=10mb
log4j.appender.file.Threshold=DEBUG
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=[%p][%d{yy-MM-dd}][%c]%m%n
#日志输出级别
log4j.logger.org.mybatis=DEBUG
log4j.logger.java.sql=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.ResultSet=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG
t_user表结构
spring
4.spring配置（含aop，tx配置）
<?xml version="1.0" encoding="utf-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--自动装配,扫描包的范围-->
<context:component-scan base-package="com.wang"/>
<!--加载properties配置文件-->
<context:property-placeholder location="classpath:db.properties"/>
<!--aop-->
<aop:aspectj-autoproxy/>
<!--配置c3p0数据源-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!--配置事务管理器-->
<bean id="txManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--设置事务加强-->
<tx:advice id="txAdvice" transaction-manager="txManager">
<tx:attributes>
<tx:method name="add*" propagation="REQUIRED"/>
<tx:method name="insert*" propagation="REQUIRED"/>
<tx:method name="update*" propagation="REQUIRED"/>
<tx:method name="delete*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<!--aop切面-->
<aop:config>
<aop:pointcut id="servicePointcut" expression="execution(* com.wang.service..*.*(..))"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="servicePointcut"/>
</aop:config>
<!--配置sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/wang/dao/*.xml"/>
</bean>
<!--配置扫描器-->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--扫描全部映射接口类-->
<property name="basePackage" value="com.wang.dao"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
</beans>
5.mybatis配置
<?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>
<!--log4j，驼峰命名转换-->
<settings>
<setting name="logImpl" value="LOG4J"/>
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
<!--定义别名-->
<typeAliases>
<package name="com.wang.pojo"/>
</typeAliases>
</configuration>
6.测试
(1).实体类(pojo)sql
import lombok.Data;
@Data
public class User {
private int userId;
private String userName;
private String userPassword;
}
(2).持久层(dao)express
import com.wang.pojo.User;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository
public interface UserMapper {
@Select("select user_name as userName,user_password as userPassword from mybatis.t_user")
List<User> getUserList();
}
(3).业务层(service)apache
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.List;
@Service
public class UserService {
@Resource
private UserMapper mapper;
public List<User> getUserList(){
return mapper.getUserList();
}
}
(4).控制层(controller)api
import javax.annotation.Resource;
import java.util.List;
@Controller
public class UserController {
@Resource
private UserService service;
public List<User> getUserList(){
return service.getUserList();
}
}
(5).运行测试mybatis
public class Start {
@Test
public void test(){
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserController userController = (UserController) context.getBean("userController");
List<User> userList = userController.getUserList();
for (User user : userList) {
System.out.println(user);
}
}
}
(6).测试结果：可以查询并输出，说明整合完成
mvc
2、使用Spring，Mybatis实现用户登陆验证
1.持久层(dao)
功能说明：
查询用户使用用户名是否存在，密码是否正确
userMapper
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;
@Repository
public interface UserMapper {
User queryUserByName(@Param("userName") String name);
}
userMapper.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="com.wang.dao.UserMapper">
<sql id="query-user">
<if test="userName != null">
user_name = #{userName}
</if>
</sql>
<select id="queryUserByName" resultType="user">
select * from mybatis.t_user
<where>
<include refid="query-user"></include>
</where>
</select>
</mapper>
2.新建实体类
该实体类将最后的结果输出显示给用户
import lombok.Data;
@Data
public class ResultCode {
private int code;
private String msg;
}
3.业务层(service)
功能说明：
1.获取用户输入的用户名和密码
2.判断输入是否为空
3.判断输入用户名是否存在
3.若用户存在，判断密码是否正确
3.若用户存在，密码正确，登陆成功！
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
@Service
public class UserService {
@Resource
private UserMapper mapper;
public ResultCode login(String name, String pwd){
ResultCode res = new ResultCode();
User user = mapper.queryUserByName(name);
if (name == "" || pwd == ""){
res.setCode(500);
res.setMsg("用户名或密码为空，请从新输入！");
return res;
}
if (user == null){
res.setCode(500);
res.setMsg("用户不存在！");
return res;
}
if (!pwd.equals(user.getUserPassword())){
res.setCode(500);
res.setMsg("密码错误！");
return res;
}
res.setCode(200);
res.setMsg("登陆成功！");
return res;
}
}
4.控制层(controller)
功能介绍
调用业务层功能
import org.springframework.stereotype.Controller;
import javax.annotation.Resource;
@Controller
public class UserController {
@Resource
private UserService service;
public ResultCode login(String name, String pwd){
return service.login(name, pwd);
}
}
5.登陆测试
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Start {
@Test
public void test(){
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserController userController = (UserController) context.getBean("userController");
ResultCode res = userController.login("admin", "123456");
System.out.println(res);
}
}