sring引入mybatis

Posted 2020-11-17 非非是

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了sring引入mybatis相关的知识，希望对你有一定的参考价值。

1、首先框架结构是这样的（jar包还是要导的）

2、web.xml和springMVC-servlet.xml未作任何新的配置，这里简单贴一下代码：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">

    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/springMVC-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>/page/index.html</welcome-file>
    </welcome-file-list>
    
    <!-- Spring 加载配置文件 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext*.xml</param-value>
    </context-param>
    
</web-app>

<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="
  http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
  http://www.springframework.org/schema/util
  http://www.springframework.org/schema/util/spring-util-4.2.xsd
  http://www.springframework.org/schema/context 
  http://www.springframework.org/schema/context/spring-context-4.2.xsd
  http://www.springframework.org/schema/mvc
  http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">

    <!-- 使用默认的注解映射 -->
    <mvc:annotation-driven />
    
    <!-- 自动扫描controller包中的控制器 -->
    <context:component-scan base-package="com.gwssi.*" />
    
    <!-- 配置静态资源 -->
    <mvc:resources location="/page/" mapping="/*" />
    
    <!-- 视图解析器 -->
    <bean id="viewReslver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/page/"></property>
        <property name="suffix" value=".html"></property>
    </bean>    
</beans>

3、applicationContext.xml中引入mybatis

　　两点：

　　　　一配置SqlSessionFectory 这是sqlsession的工厂，后边要通过sqlsession来执行SQL；

　　　　二配置映射接口，这样就会自动扫描文件中的接口进行注入。

<?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:mvc="http://www.springframework.org/schema/mvc"
    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-3.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
      http://www.springframework.org/schema/aop
      http://www.springframework.org/schema/aop/spring-aop-3.2.xsd"
    default-autowire="byName">    
        
    
    
    <!-- <context:property-placeholder location="classpath:datasource.properties"/> -->    
    <!-- <context:property-placeholder properties-ref="propertyConfigurer" /> -->
    
    <!-- 加载配置文件 -->
    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:*.properties</value>
            </list>
        </property>
    </bean>

    <!-- 配置数据库 -->    
    <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
        <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"></property>
        <property name="url" value="jdbc:oracle:thin:@//127.0.0.1:1521/zpc"></property>
        <property name="username" value="test"></property>
        <property name="password" value="test"></property>
        <property name="initialSize" value="5"></property>
    </bean>
    
    <!--注入jdbcTemplate-->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <!-- <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" lazy-init="false">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
        <property name="mappingLocations" value="classpath:*.hbm.xml"></property>
    </bean> -->
    
    <!-- 配置sqlSessionFactory, 并将数据源注入 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="configLocation" value="classpath:mybatis-config.xml" />
    </bean>
    
    <!-- 配置映射接口 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.gwssi.zpc.dao" />
        <!--单一数据源时可以不配制此项-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    </bean>
    
    <!-- 事务管理DataSourceTransactionManager -->
    <!-- 配置声明式事务 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    <tx:annotation-driven transaction-manager="txManager" />
    
    <!-- 通过AOP配置提供事务增强，让service包下所有Bean的所有方法拥有事务 -->
  <!--   <aop:config proxy-target-class="true">
        <aop:pointcut id="serviceMethod"
                      expression="(execution(* com.ghc.service..*(..))) and (@annotation(org.springframework.transaction.annotation.Transactional))" />
        <aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice" />
    </aop:config>
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="*" />
        </tx:attributes>
    </tx:advice> -->
    
    
    
</beans>

4、mybatis-config.xml 的配置，两个功能：配置数据库信息；加载mapper文件

<?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>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC" />
            <!-- 配置数据库连接信息 -->
            <dataSource type="POOLED">
                <property name="driver" value="oracle.jdbc.driver.OracleDriver" />
                <property name="url" value="jdbc:oracle:thin:@//127.0.0.1:1521/zpc" />
                <property name="username" value="test" />
                <property name="password" value="test" />
            </dataSource>
        </environment>
    </environments>
    
    <mappers>
        <mapper resource="com/gwssi/zpc/dao/mybatis/userMapper.xml"/>
    </mappers>
</configuration>

5、配置userMapper.xml，它是用来放SQL语句的，是所有SQL的家，用mybatis的话会有很多很多的mapper文件，要习惯。

　　namespace一定要注意是dao的接口类

　　resultType 用java.util.map的话就是常用的List<Map<String,Object>>，是我喜欢的东西，哈哈。

<?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.gwssi.zpc.dao.UserDao"><!-- 必须是UserDao -->
    
   <select id="information" parameterType="String" resultType="java.util.Map" >  <!-- java.util.Map -->
        select * from SIGN t <!-- where t.id=#{id} -->
    </select>

   <!--根据id查询得到一个user对象-->
   <select id="getUser" parameterType="String" resultType="com.gwssi.zpc.domain.User">
       select * from users where id=#{id}
    </select>
    
    <!-- 创建用户(Create) -->
    <insert id="addUser" parameterType="com.gwssi.zpc.domain.User">
        insert into users(id,name,age) values(#{id},#{name},#{age})
    </insert>
    
    <!-- 删除用户(Remove) -->
    <delete id="deleteUser" parameterType="String">
        delete from users where id=#{id}
    </delete>
    
    <!-- 修改用户(Update) -->
    <update id="updateUser" parameterType="com.gwssi.zpc.domain.User">
        update users set name=#{name},age=#{age} where id=#{id}
    </update> 
    
    <!-- 查询全部用户-->
     <select id="getAllUsers" resultType="com.gwssi.zpc.domain.User">
        select * from users
    </select> 
</mapper>

6、User.java先写一下吧

package com.gwssi.zpc.domain;

/**
 * 
 * @author fefeishi
 *
 */
public class User {
    
    private String id;
    private String name;
    private String age;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

}

7、然后是UserDao和UserDaoImpl

　　这里注意一点dao的方法名和mapper中的id名称必须保持一致。

　　这里session执行sql似乎还不是很完美，待研究。

package com.gwssi.zpc.dao;

import java.util.List;
import java.util.Map;

import org.springframework.stereotype.Repository;

import com.gwssi.zpc.domain.User;

@Repository
public interface UserDao {//dao方法名必须和mapper中的id一致    

    List<Map<String, Object>> information(String id);    
    
    public User getUser(String id);
    
    public void addUser(User user);
    
    public void deleteUser(String id);
    
    public void updateUser(User user);
    
    public List<User> getAllUsers();
}

package com.gwssi.zpc.dao.impl;

import java.util.List;
import java.util.Map;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import com.gwssi.zpc.dao.UserDao;
import com.gwssi.zpc.domain.User;

public class UserDaoImpl implements UserDao {
    
    @Autowired
    private SqlSessionFactory sqlSessionFactory;

    @Override
    public List<Map<String,Object>> information(String id) {
        SqlSession sqlSession = sqlSessionFactory.openSession();        
        List<Map<String,Object>> list= sqlSession.selectOne("com.gwssi.zpc.dao.UserDao.getUser",id);
        sqlSession.close();
        return list;
    }
    
    @Override
    public User getUser(String id) {
        SqlSession sqlSession = sqlSessionFactory.openSession();        
        User user = sqlSession.selectOne("com.gwssi.zpc.dao.UserDao.getUser",id);
        sqlSession.close();
        return user;
    }

    @Override
    public void addUser(User user) {
        SqlSession sqlSession = sqlSessionFactory.openSession();        
        sqlSession.update("com.gwssi.zpc.dao.UserDao.getUser",user);
        sqlSession.close();
    }

    @Override
    public void deleteUser(String id) {
        SqlSession sqlSession = sqlSessionFactory.openSession();        
        sqlSession.update("com.gwssi.zpc.dao.UserDao.deleteUser",id);
        sqlSession.close();
    }

    @Override
    public void updateUser(User user) {
        SqlSession sqlSession = sqlSessionFactory.openSession();        
        sqlSession.selectOne("com.gwssi.zpc.dao.UserDao.updateUser",user);
        sqlSession.close();
    }

    @Override
    public List<User> getAllUsers() {
        SqlSession sqlSession = sqlSessionFactory.openSession();        
        List<User> list = sqlSession.selectList("com.gwssi.zpc.dao.UserDao.getAllUsers");
        sqlSession.close();
        return list;
    }
}

8、contoller中简单调一下好了

package com.gwssi.zpc.controller;

import java.util.List;
import java.util.Map;

import org.apache.log4j.Logger;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.gwssi.zpc.dao.UserDao;
import com.gwssi.zpc.domain.User;

@RestController
@RequestMapping("/a")
public class testController {

    @Autowired
    UserDao userdao;
    
    private final static Logger log = Logger.getLogger(testController.class);
   
    @RequestMapping("/1")
    public void main1(){
        User user=new User();
        user.setId("4");
        user.setName("栾坤");
        user.setAge("44");
        userdao.addUser(user);        
        selectAll();        
        log.info(" ");
    }
    @RequestMapping("/2")
    public void main2(){        
        User user1=new User();
        user1.setId("4");
        user1.setName("栾坤2");
        user1.setAge("22");
        userdao.updateUser(user1);        
        selectAll();
        log.info(" ");
    }
    @RequestMapping("/3")
    public void main3(){        
        userdao.deleteUser("4");
        selectAll();
        log.info(" ");
    }
    
    @RequestMapping("/4")
    public void main4(){        
        List<Map<String,Object>> list=userdao.information("2309685A78F1492C86DE4837F08879FD");
        log.info(list.get(0).get("FILENAME"));
        log.info(list.get(1).get("FILENAME"));
        log.info(list.get(2).get("FILENAME"));
        log.info(list.get(3).get("FILENAME"));
        log.info(list.get(4).get("FILENAME"));
        log.info(list.size());
    }
    
    
    public void selectAll(){
        List<User> list=userdao.getAllUsers();
        for(User u:list){
            log.info(u.getId()+" "+u.getName()+" "+u.getAge());
        }
    }
}

以上是关于sring引入mybatis的主要内容，如果未能解决你的问题，请参考以下文章

谷歌浏览器调试jsp 引入代码片段，如何调试代码片段中的js

MyBatis-Spring--搭建步骤

Mybatis最全的高质量面试题和答案—3

Sring类的codePointAt()方法

spring源代码系列sring源代码编译 spring源代码下载 spring源代码阅读

markdown [mybatis参考]关于mybatis #mybatis的一些片段