Spring + Spring MVC + Mybatis 框架整合

時間 2019-11-10

標籤 spring mvc mybatis 框架整合欄目 Spring 简体版

原文原文鏈接

最近學習Mybatis，學習了最基本的配置CRUD後，如今開始整合至Spring MVC.java

一，框架說明web

1, 系統使用maven構建Web項目spring

2，DB: MS sqlserver 2012sql

3，Server : Tomcat 8apache

4，Test : Junitjson

5，日誌：slf4j + lobbackapi

目錄構建以下：spring-mvc

二，建立數據表session

CREATE TABLE [dbo].[user_data](
    [id] [int] IDENTITY(1,1) NOT NULL,
    [name] [nvarchar](50) NULL,
    [password] [nvarchar](150) NULL,
    [age] [int] NULL,
 CONSTRAINT [PK_user_data] PRIMARY KEY CLUSTERED 
(
    [id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

INSERT INTO user_data VALUES('test_A','123456781',21);
INSERT INTO user_data VALUES('test_B','123456782',22);
INSERT INTO user_data VALUES('test_C','123456783',23);
INSERT INTO user_data VALUES('test_D','123456784',24);
INSERT INTO user_data VALUES('test_E','123456785',25);

三，添加依賴包: pom.xml 配置mybatis

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>luken</groupId>
    <artifactId>SSM</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <properties>
        <!-- spring version -->
        <spring.version>4.3.6.RELEASE</spring.version>
        <!-- aspectj version -->
        <aspectj.version>1.8.9</aspectj.version>
        <!-- logback version -->
        <logback.version>1.2.1</logback.version>
    </properties>
    <dependencies>
        <!-- spring mvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- aspectj -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>${aspectj.version}</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>${aspectj.version}</version>
        </dependency>
        <!-- db: sql server -->
        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>mssql-jdbc</artifactId>
            <version>6.1.0.jre8</version>
        </dependency>
        <!-- mybatis orm -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!-- DBCP2 鏈接池 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-dbcp2</artifactId>
            <version>2.1.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>2.4.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.geronimo.specs</groupId>
            <artifactId>geronimo-jta_1.1_spec</artifactId>
            <version>1.1.1</version>
        </dependency>
        <!-- c3p0 鏈接池 -->
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <!-- jackson : json support -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.8.5</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.5</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.7</version>
        </dependency>
        <!-- file upload -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.2</version>
        </dependency>
        <!-- properties file yaml support -->
        <dependency>
            <groupId>org.yaml</groupId>
            <artifactId>snakeyaml</artifactId>
            <version>1.17</version>
        </dependency>
        <!-- servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <!-- log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <!-- slf4j -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.21</version>
        </dependency>
        <!-- logback : slf4j + logback -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>${logback.version}</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>${logback.version}</version>
        </dependency>
        <!-- junit test -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>
    <!-- 添加指定jdk版本插件 -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

四，配置實體 User.java

package com.luken.model;

public class User {
    private int id;
    private String name;
    private String password;
    private int age;

    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", password=" + password + ", age=" + age + "]";
    }

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public int getAge() {
        return age;
    }

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

}

五，配置Mybatis ORM 映射接口

package com.luken.dao;

import java.util.List;

import org.apache.ibatis.annotations.Param;

import com.luken.model.User;

public interface UserDao {

    public User findUserById(@Param("id") int id);

    public List<User> findUserList();

    public int addUser(User user);

    public int updateUser(User user);

    public int delUser(@Param("id") int id);

}

六，建立的映射文件，在資源文件目錄resources下，新建conf/mybatis/mapping/UserMapper.xml（命名儘可能都遵循一個規則，便於掃描，這裏是用「實體名+Mapper」）以下：

<?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">
<!-- 命名空間: 對應接口的包名+接口名 -->
<mapper namespace="com.luken.dao.UserDao">
    <!-- 經過Id查找 -->
    <select id="findUserById" resultType="com.luken.model.User">
        select * from user_data u where id=#{id}
    </select>
    <!-- 查詢全部的User -->
    <select id="findUserList" resultType="com.luken.model.User">
        SELECT u.id, u.name, u.password, u.age FROM user_data u;
    </select>
    <!-- 添加 -->
    <insert id="addUser" parameterType="com.luken.model.User">
        insert into user_data values(#{name},#{password},#{age})
    </insert>
    <!-- 刪除 -->
    <delete id="delUser" >
        DELETE FROM user_data WHERE id=#{id}
    </delete>
    <!-- 更新 -->
    <update id="updateUser">
        UPDATE user_data SET name=#{name},password=#{password},age=#{age} WHERE id=#{id}
    </update>
</mapper>

七，Spring 整合Mybatis配置

　　7.1 在resources文件夾下，新建一個名爲 ssm 文件夾，並在ssm文件夾上新建文件 config.yml , config.yml用於存放項目的配置信息

jdbc:
    driver: com.microsoft.sqlserver.jdbc.SQLServerDriver
    url: jdbc:sqlserver://10.180.139.246:1433;DatabaseName=mybatis
    username: yourname
    password: yourpwd

　　7.2　配置Mybatis與spring 整合

　　　　(1) 在resources根目錄下，新建文件夾 conf/spring，而後在spring文件夾下建spring-datasource.xml

　　　　(2) datasource 鏈接池選擇dbcp2,剛開始選擇c3p0,查詢時間匹配String字段報錯，緣由尚未花時間找，待找到後，再做說明修改。

　　　　Spring-datasource.xml 內容以下:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans   
       http://www.springframework.org/schema/beans/spring-beans-4.3.xsd  
       http://www.springframework.org/schema/aop  
       http://www.springframework.org/schema/aop/spring-aop-4.3.xsd  
       http://www.springframework.org/schema/context  
       http://www.springframework.org/schema/context/spring-context-4.3.xsd  
       http://www.springframework.org/schema/tx  
       http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

    <!-- 鏈接池 dbcp2 配置 -->
    <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"  
        destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}" />  
        <property name="url" value="${jdbc.url}" />  
        <property name="username" value="${jdbc.username}" />  
        <property name="password" value="${jdbc.password}" />
        <!-- 鏈接池啓動時建立的鏈接數量的初始值  默認值是0 -->  
        <property name="initialSize" value="3" />  
        <!-- 最小空閒值  默認值是0 -->  
        <property name="minIdle" value="3" />  
        <!-- 最大空閒值 0時無限制  默認值是8 -->  
        <property name="maxIdle" value="5" />  
        <!-- 鏈接池的最大值 0時無限制   默認值是8 -->  
        <property name="maxTotal" value="15" />  
    </bean>
    <!-- 配置sqlSessionFactory: spring和MyBatis完美整合，不須要mybatis的配置映射文件 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation" value="classpath:conf/mybatis/mybatis-config.xml" />
        <!-- 自動掃描mapping.xml文件 -->
        <property name="mapperLocations" value="classpath:conf/mybatis/mapping/*.xml" />
    </bean>
    
    <!-- DAO接口所在包名，Spring會自動查找其下的類 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.luken.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>
</beans>

　　7.3 配置Spring IOC, 在resources/conf/spring 目錄下新建文件：spring-context.xml

　　spring-context.xml 配置以下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans   
       http://www.springframework.org/schema/beans/spring-beans-4.3.xsd  
       http://www.springframework.org/schema/aop  
       http://www.springframework.org/schema/aop/spring-aop-4.3.xsd  
       http://www.springframework.org/schema/context  
       http://www.springframework.org/schema/context/spring-context-4.3.xsd  
       http://www.springframework.org/schema/tx  
       http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
    <!-- 自動掃描組件包 -->
    <context:component-scan base-package="com.luken.*" />
    <aop:aspectj-autoproxy />
    
    <!-- 加載配置文件 -->
    <bean id="yamlProperties"
        class="org.springframework.beans.factory.config.YamlPropertiesFactoryBean">
        <property name="resources" value="classpath:ssm/config.yml" />
    </bean>
    <context:property-placeholder properties-ref="yamlProperties" />
    
    <!-- (事務管理)transaction manager, use JtaTransactionManager for global tx -->  
    <bean id="transactionManager"  
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  
        <property name="dataSource" ref="dataSource" />  
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager" />
    
    
</beans>

7.4

mybatis-config.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>
    <settings>
        <setting name="cacheEnabled" value="false"/>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <setting name="useGeneratedKeys" value="true"/>
        <setting name="safeRowBoundsEnabled" value="false"/>
        <setting name="defaultExecutorType" value="REUSE"/>
        <setting name="defaultStatementTimeout" value="600"/>
    </settings>

    <typeAliases>
        <typeAlias alias="User" type="com.luken.model.User"/>
    </typeAliases>
    <!-- 若是選擇了「自動掃描mapping.xml文件」，則不須要配置mappers -->
    <!-- 
    <mappers>
        <mapper resource="conf/mybatis/mapping/userMapper.xml"/>
    </mappers>
     -->
</configuration>

八，寫服務層（service層）

　　8.1 UserService.java 接口類

package com.luken.service;

import java.util.List;

import org.apache.ibatis.annotations.Param;

import com.luken.model.User;

public interface UserService {

    public User findUserById(int id);

    public List<User> findUserList();

    public int addUser(User user);

    public int updateUser(User user);

    public int delUser(@Param("id") int id);
}

　　8.2 UserServiceImpl.java 實現類

package com.luken.service;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.luken.dao.UserDao;
import com.luken.model.User;

@Service
public class UserServiceImpl implements UserService {

    @Resource
    UserDao userDao;
    
    @Override
    public User findUserById(int id) {
        return this.userDao.findUserById(id);
    }
    
    @Override
    public List<User> findUserList() {
        return this.userDao.findUserList();
    }

    @Override
    public int addUser(User user) {
        return this.userDao.addUser(user);
    }

    @Override
    public int updateUser(User user) {
        return this.userDao.updateUser(user);
    }

    @Override
    public int delUser(int id) {
        // TODO Auto-generated method stub
        return this.userDao.delUser(id);
    }


}

九，配置日誌： slf4j + logbock

　　到目前爲止，spring整合mybatis基本完成，先對其進行單元測試，測試前先配置日誌（能夠省略）

　　9.1 在resources文件夾下新建文件：logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <!-- encoder 默認配置爲PatternLayoutEncoder -->
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
            </pattern>
        </encoder>
    </appender>

    <root level="INFO">
        <appender-ref ref="STDOUT" />
    </root>
</configuration>

十， Junit測試

　　10.1 測試datasource配置

package com.luken.test;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.sql.DataSource;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestDataSource {
    private static ApplicationContext context;

    public static void main(String args[]) throws SQLException {
        context = new ClassPathXmlApplicationContext("conf/spring/spring-context.xml",
                "conf/spring/spring-datasource.xml");
        DataSource ds = context.getBean("dataSource", DataSource.class);

        java.sql.Connection conn = ds.getConnection();

        String sql = "select * From user_data";
        PreparedStatement ps = conn.prepareStatement(sql);
        ResultSet rs = ps.executeQuery();
        while (rs.next()) {
            System.out.println(rs.getString(1));
            System.out.println(rs.getString(2));
            System.out.println(rs.getString(3));
        }
        if (ps != null) {
            ps.close();
        }
        if (conn != null) {
            conn.close();
        }
    }
}

　　　　測試結果：

1
test_A
123456781
2
test_B
123456782
3
test_C
123456783
4
test_D
123456784
5
test_E
123456785

　　10.2 測試spring + mybatis整合

package com.luken.test;

import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.luken.model.User;
import com.luken.service.UserService;

@ContextConfiguration(locations = { "classpath:conf/spring/spring-context.xml",
        "classpath:conf/spring/spring-datasource.xml" })
@RunWith(SpringJUnit4ClassRunner.class)
public class TestSM {
    private static Logger logger = LoggerFactory.getLogger(TestSM.class);

    @Autowired
    UserService userService;

    @org.junit.Test
    public void test() {
        User user = userService.findUserById(1);
        logger.info("用戶：{}", user);
    }
}

　　測試結果：


16:11:42.109 [main] INFO com.luken.test.TestSM - 用戶：User [id=1, name=test_A, password=123456781, age=21]

十一，配置 spring MVC

　　11.1 在resources/conf/spring 文件夾中添加spring-mvc.xml文件

　　　　Spring-mvc.xml內容以下

<?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:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!-- 掃描 -->
    <context:component-scan base-package="com.luken.web.controller" />
    <!-- 驅動註解 -->
    <mvc:annotation-driven />
    <!-- 配置默認mvc servlet -->
    <mvc:default-servlet-handler />
    <!-- 配置 viewResolver -->
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

　　11.2 配置web.xml , 內容以下

<?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" id="WebApp_ID" version="3.0">
  <display-name>SSM</display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:conf/spring/spring-mvc.xml</param-value>
      </init-param>
  </servlet>
  <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>/</url-pattern>
  </servlet-mapping>
  
      <!-- spring 容器啓動配置 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:conf/spring/spring-context.xml, classpath:conf/spring/spring-datasource.xml</param-value>
    </context-param>
    
    <!-- Encoding Filter -->
    <filter>
        <filter-name>encodingFilter</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>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    <!-- spring beans的防止內存泄露 -->
    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>

    <!-- error page -->
    <error-page>
        <error-code>404</error-code>
        <location>/error.jsp</location>
    </error-page>
    <error-page>
        <error-code>500</error-code>
        <location>/notfound.jsp</location>
    </error-page>
  
</web-app>

　　11.3 在webapp 目錄下分別新建index.jsp,error.jsp, notfound.jsp，並在/WEB-INF/ 目錄下新建 views 文件夾

　　　　（此項目中也能夠不建,與 Spring-mvc.xml viewResolver preffix 一致）

十二，mvc controller

　　12.1 UserController.java

　　　　其實還有刪除和修改的方法沒有寫，可留給你們自行測試

package com.luken.web.controller;

import java.util.Date;
import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import com.luken.model.User;
import com.luken.service.UserService;

@RestController
@RequestMapping("user")
public class UserController {
    private static final Logger logger = LoggerFactory.getLogger(UserController.class);
    
    @Resource
    private UserService userService;

    @RequestMapping("/findUserById")
    public User findUserById(HttpSession session,@RequestParam int id ){
        User user = this.userService.findUserById(id);
        return user;
    }

    @RequestMapping(path = {"findUserList"}, method = {RequestMethod.GET})
    public List<User> findUserList() {
        return this.userService.findUserList();
    }
    
    @RequestMapping(path = {"addUser"}, method = {RequestMethod.GET})
    public String addUser(HttpSession session, @RequestParam String name, @RequestParam String password,
            @RequestParam int age) {
        User user = new User();
        user.setName(name);
        user.setPassword(password);
        user.setAge(age);
        int retResult = this.userService.addUser(user);
        
        String result = " add success";
        if(retResult == 0) {
            result = "fail";
        }
        return result;
    }
}

十三，運行ssm項目

　　測試輸入url: http://localhost:8081/SSM/user/findUserList

　　獲得的結果爲：

[{"id":1,"name":"test_A","password":"123456781","age":21},{"id":2,"name":"test_B","password":"123456782","age":22},{"id":3,"name":"test_C","password":"123456783","age":23},{"id":4,"name":"test_D","password":"123456784","age":24},{"id":5,"name":"test_E","password":"123456785","age":25}]

　　測試輸入url: http://localhost:8081/SSM/user/findUserById?id=2

　　獲得的結果爲：

{"id":2,"name":"test_B","password":"123456782","age":22}

總結

　　至此，spring + spring mvc + mybatis 整合配置完成，因爲是第一次配置，其中也遇到一些問題

　　　　1，mapper 命名空間要是接口的包名+接口名一至

　　　　2，採用掃描的方式掃描 mapper xml 其能夠省略導入mybatis-config.xml

　　　　3, 鏈接池的選擇，也可選用c3p0 鏈接池

<!-- 鏈接池 c3p0 配置 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
        <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>