SSM框架整合之Spring+SpringMVC+MyBatis实践步骤

1、基本概念

1.1、Spring

Spring是一个开源框架，Spring是于2003年兴起的一个轻量级的Java开发框架，由RodJohnson在其著作ExpertOne-On-OneJ2EEDevelopmentandDesign中阐述的部分理念和原型衍生而来。它是为了解决企业应用开发的复杂性而创建的。Spring使用基本的JavaBean来完成以前只可能由EJB完成的事情。然而，Spring的用途不仅限于服务器端的开发。从简单性、可测试性和松耦合的角度而言，任何Java应用都可以从Spring中受益。简单来说，Spring是一个轻量级的控制反转（IoC）和面向切面（AOP）的容器框架。

1.2、SpringMVC

SpringMVC属于SpringFrameWork的后续产品，已经融合在SpringWebFlow里面。SpringMVC分离了控制器、模型对象、分派器以及处理程序对象的角色，这种分离让它们更容易进行定制。

1.3、MyBatis

MyBatis本是apache的一个开源项目iBatis,2010年这个项目由apachesoftwarefoundation迁移到了googlecode，并且改名为MyBatis。MyBatis是一个基于Java的持久层框架。iBATIS提供的持久层框架包括SQLMaps和DataAccessObjects（DAO）MyBatis消除了几乎所有的JDBC代码和参数的手工设置以及结果集的检索。MyBatis使用简单的XML或注解用于配置和原始映射，将接口和Java的POJOs（PlainOldJavaObjects，普通的Java对象）映射成数据库中的记录。

2、开发环境搭建以及创建Maven Web项目

参看之前的博文：https://www.jb51.net/article/131269.htm

3、SSM整合

下面主要介绍三大框架的整合，至于环境的搭建以及项目的创建，参看上面的博文。这次整合我分了2个配置文件，分别是spring-mybatis.xml，包含spring和mybatis的配置文件，还有个是spring-mvc的配置文件，此外有2个资源文件：jdbc.propertis和log4j.properties。完整目录结构如下（最后附上源码下载地址）：

使用框架的版本：

Spring4.0.2RELEASE

SpringMVC4.0.2RELEASE

MyBatis3.2.6

3.1、Maven引入需要的JAR包

在pom.xml中引入jar包

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.javen.maven01</groupId>
    <artifactId>maven01</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>maven01 Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <properties>
        <!-- spring版本号 -->
        <spring.version>4.0.2.RELEASE</spring.version>
        <!-- mybatis版本号 -->
        <mybatis.version>3.2.6</mybatis.version>
        <!-- log4j日志文件管理包版本 -->
        <slf4j.version>1.7.7</slf4j.version>
        <log4j.version>1.2.17</log4j.version>
    </properties> 

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
             <!-- 表示开发的时候引入，发布的时候不会加载此包 -->
            <scope>test</scope>
        </dependency>
        <!-- <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency> -->

         <!-- spring核心包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>  

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-oxm</artifactId>
            <version>${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-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>  

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>  

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>  

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- mybatis核心包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
         <!-- mybatis/spring包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.2.2</version>
        </dependency>  

         <!-- 导入java ee jar 包 -->
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
        </dependency>  

         <!-- 导入Mysql数据库链接jar包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.36</version>
        </dependency>
        <!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 -->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.2.2</version>
        </dependency>  

        <!-- JSTL标签类 -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- 日志文件管理包 -->
        <!-- log start -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>  

        <!-- 格式化对象，方便输出日志 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.1.41</version>
        </dependency>  

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>  

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <!-- log end -->
        <!-- 映入JSON -->
        <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.9.13</version>
        </dependency>
        <!-- 上传组件包 -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.9</version>
        </dependency>  

    </dependencies>

    <build>
        <finalName>maven01</finalName>
        <plugins>
            <plugin>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>9.2.8.v20150217</version>
                <configuration>
                    <httpConnector>
                        <port>80</port>
                    </httpConnector>
                    <stopKey>shutdown</stopKey>
                    <stopPort>9966</stopPort>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

3.2、整合SpringMVC

3.2.1、配置spring-mvc.xml

配置里面的注释也很详细，主要是自动扫描控制器，视图模式，注解的启动这三个。

<?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:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
                        http://www.springframework.org/schema/context
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd
                        http://www.springframework.org/schema/mvc
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!-- 自动扫描该包，使SpringMVC认为包下用了@controller注解的类是控制器 -->
    <context:component-scan base-package="com.javen.controller" />
    <!-- 扩充了注解驱动，可以将请求参数绑定到控制器参数 -->
    <mvc:annotation-driven/>
    <!-- 静态资源处理  css js imgs -->
    <mvc:resources location="/resources/**" mapping="/resources"/>

    <!--避免IE执行AJAX时，返回JSON出现下载文件 -->
    <bean id="mappingJacksonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/html;charset=UTF-8</value>
            </list>
        </property>
    </bean>
    <!-- 启动SpringMVC的注解功能，完成请求和注解POJO的映射 -->
    <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON转换器 -->
            </list>
        </property>
    </bean>  

    <!-- 配置文件上传，如果没有使用文件上传可以不用配置，当然如果不配，那么配置文件中也不必引入上传组件包 -->
    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- 默认编码 -->
        <property name="defaultEncoding" value="utf-8" />
        <!-- 文件大小最大值 -->
        <property name="maxUploadSize" value="10485760000" />
        <!-- 内存中的最大值 -->
        <property name="maxInMemorySize" value="40960" />
        <!-- 启用是为了推迟文件解析，以便捕获文件大小异常 -->
        <property name="resolveLazily" value="true"/>
    </bean>   

    <!-- 配置ViewResolver 。可用多个ViewResolver 。使用order属性排序。   InternalResourceViewResolver 放在最后-->
    <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
    <property name="order" value="1"></property>
        <property name="mediaTypes">
            <map>
                <!-- 告诉视图解析器，返回的类型为json格式 -->
                <entry key="json" value="application/json" />
                <entry key="xml" value="application/xml" />
                <entry key="htm" value="text/htm" />
            </map>
        </property>
        <property name="defaultViews">
            <list>
                <!-- ModelAndView里的数据变成JSON -->
                <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
            </list>
        </property>
        <property name="ignoreAcceptHeader" value="true"></property>
    </bean>

   <!-- 定义跳转的文件的前后缀 ，视图模式配置-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址 -->
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

3.2.2、配置web.xml文件

配置的spring-mvc的Servlet就是为了完成SpringMVC+MAVEN的整合。

web.xml

<?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">
    <display-name>Archetype Created Web Application</display-name>
    <!-- Spring和mybatis的配置文件 -->
   <!--  <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-mybatis.xml</param-value>
    </context-param>   -->
    <!-- 编码过滤器 -->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <async-supported>true</async-supported>
        <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监听器 -->
   <!--  <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>   -->
    <!-- 防止Spring内存溢出监听器 -->
    <!-- <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>  --> 

    <!-- Spring MVC servlet -->
    <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:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <!-- 此处可以可以配置成*.do，对应struts的后缀习惯 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>/index.jsp</welcome-file>
    </welcome-file-list>  

</web-app>

3.2.3、Log4j的配置

为了方便调试，一般都会使用日志来输出信息，Log4j是Apache的一个开放源代码项目，通过使用Log4j，我们可以控制日志信息输送的目的地是控制台、文件、GUI组件，甚至是套接口服务器、NT的事件记录器、UNIXSyslog守护进程等；我们也可以控制每一条日志的输出格式；通过定义每一条日志信息的级别，我们能够更加细致地控制日志的生成过程。

Log4j的配置很简单，而且也是通用的，下面给出一个基本的配置，换到其他项目中也无需做多大的调整，如果想做调整或者想了解Log4j的各种配置，参看我转载的一篇博文，很详细：https://www.jb51.net/article/132334.htm

下面给出配置文件目录：

log4j.properties

log4j.rootLogger=INFO,Console,File
#定义日志输出目的地为控制台
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
#可以灵活地指定日志输出格式，下面一行是指定具体的格式
log4j.appender.Console.layout = org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n  

#文件大小到达指定尺寸的时候产生一个新的文件
log4j.appender.File = org.apache.log4j.RollingFileAppender
#指定输出目录
log4j.appender.File.File = logs/ssm.log
#定义文件最大大小
log4j.appender.File.MaxFileSize = 10MB
# 输出所以日志，如果换成DEBUG表示输出DEBUG以上级别日志
log4j.appender.File.Threshold = ALL
log4j.appender.File.layout = org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n

3.2.4、使用Jetty测试

package com.javen.model;

public class User {
    private Integer id;

    private String userName;

    private String password;

    private Integer age;

    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 == null ? null : userName.trim();
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }

    public Integer getAge() {
        return age;
    }

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

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

}

package com.javen.controller;
import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.javen.model.User;

@Controller
@RequestMapping("/user")
// /user/**
public class UserController {
    private static Logger log=LoggerFactory.getLogger(UserController.class);

    // /user/test?id=1
    @RequestMapping(value="/test",method=RequestMethod.GET)
    public String test(HttpServletRequest request,Model model){
        int userId = Integer.parseInt(request.getParameter("id"));
        System.out.println("userId:"+userId);
        User user=null;
        if (userId==1) {
             user = new User();
             user.setAge(11);
             user.setId(1);
             user.setPassword("123");
             user.setUserName("javen");
        }

        log.debug(user.toString());
        model.addAttribute("user", user);
        return "index";
    }
}

在浏览器中输入：http://localhost/user/test?id=1

到此 SpringMVC+Maven 整合完毕

3.3 Spring与MyBatis的整合

取消3.2.2 web.xml中注释的代码

3.3.1、建立JDBC属性文件

jdbc.properties（文件编码修改为utf-8）

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/maven
username=root
password=root
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000

此时的目录结构为

3.3.2、建立spring-mybatis.xml配置文件

这个文件就是用来完成spring和mybatis的整合的。这里面也没多少行配置，主要的就是自动扫描，自动注入，配置数据库。注释也很详细，大家看看就明白了。

spring-mybatis.xml

<?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:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
                        http://www.springframework.org/schema/context
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd
                        http://www.springframework.org/schema/mvc
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!-- 自动扫描 -->
    <context:component-scan base-package="com.javen" />  

    <!-- 引入配置文件 -->
    <bean id="propertyConfigurer"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:jdbc.properties" />
    </bean>  

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName" value="${driver}" />
        <property name="url" value="${url}" />
        <property name="username" value="${username}" />
        <property name="password" value="${password}" />
        <!-- 初始化连接大小 -->
        <property name="initialSize" value="${initialSize}"></property>
        <!-- 连接池最大数量 -->
        <property name="maxActive" value="${maxActive}"></property>
        <!-- 连接池最大空闲 -->
        <property name="maxIdle" value="${maxIdle}"></property>
        <!-- 连接池最小空闲 -->
        <property name="minIdle" value="${minIdle}"></property>
        <!-- 获取连接最大等待时间 -->
        <property name="maxWait" value="${maxWait}"></property>
    </bean>  

    <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描mapping.xml文件 -->
        <property name="mapperLocations" value="classpath:com/javen/mapping/*.xml"></property>
    </bean>  

    <!-- DAO接口所在包名，Spring会自动查找其下的类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.javen.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    </bean>  

    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>  

</beans>

3.4、JUnit测试

经过以上步骤，我们已经完成了Spring和mybatis的整合，这样我们就可以编写一段测试代码来试试是否成功了。

3.4.1、创建测试用表

既然我们需要测试，那么我们就需要建立在数据库中建立一个测试表，这个表建的很简单，SQL语句为：

-- ----------------------------
-- Table structure for `user_t`
-- ----------------------------
DROP TABLE IF EXISTS `user_t`;
CREATE TABLE `user_t` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_name` varchar(40) NOT NULL,
  `password` varchar(255) NOT NULL,
  `age` int(4) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of user_t
-- ----------------------------
INSERT INTO `user_t` VALUES ('1', '测试', '345', '24');
INSERT INTO `user_t` VALUES ('2', 'javen', '123', '10');

3.4.2、利用MyBatis Generator自动创建代码

参考博文：https://www.jb51.net/article/128909.htm

这个可根据表自动创建实体类、MyBatis映射文件以及DAO接口，当然，我习惯将生成的接口名改为IUserDao，而不是直接用它生成的UserMapper。如果不想麻烦就可以不改。完成后将文件复制到工程中。如图：

3.4.3、建立Service接口和实现类

下面给出具体的内容：

IUserService.jave

package com.javen.service;  

import com.javen.model.User;

public interface IUserService {
    public User getUserById(int userId);
}

UserServiceImpl.java

package com.javen.service.impl;
import javax.annotation.Resource;  

import org.springframework.stereotype.Service;
import com.javen.dao.IUserDao;
import com.javen.model.User;
import com.javen.service.IUserService;

@Service("userService")
public class UserServiceImpl implements IUserService {
    @Resource
    private IUserDao userDao;  

    public User getUserById(int userId) {
        // TODO Auto-generated method stub
        return this.userDao.selectByPrimaryKey(userId);
    }  

}

3.4.4、建立测试类

测试类在src/test/java中建立，下面测试类中注释掉的部分是不使用Spring时，一般情况下的一种测试方法；如果使用了Spring那么就可以使用注解的方式来引入配置文件和类，然后再将service接口对象注入，就可以进行测试了。

如果测试成功，表示Spring和Mybatis已经整合成功了。输出信息使用的是Log4j打印到控制台。

package com.javen.testmybatis;

import javax.annotation.Resource;  

import org.apache.log4j.Logger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.alibaba.fastjson.JSON;
import com.javen.model.User;
import com.javen.service.IUserService;

@RunWith(SpringJUnit4ClassRunner.class)     //表示继承了SpringJUnit4ClassRunner类
@ContextConfiguration(locations = {"classpath:spring-mybatis.xml"})  

public class TestMyBatis {
    private static Logger logger = Logger.getLogger(TestMyBatis.class);
//  private ApplicationContext ac = null;
    @Resource
    private IUserService userService = null;  

//  @Before
//  public void before() {
//      ac = new ClassPathXmlApplicationContext("applicationContext.xml");
//      userService = (IUserService) ac.getBean("userService");
//  }  

    @Test
    public void test1() {
        User user = userService.getUserById(1);
        // System.out.println(user.getUserName());
        // logger.info("值："+user.getUserName());
        logger.info(JSON.toJSONString(user));
    }
}

测试结果

3.4.5、建立UserController类

UserController.java控制器

package com.javen.controller;
import java.io.File;
import java.io.IOException;
import java.util.Map;

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

import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
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.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import com.javen.model.User;
import com.javen.service.IUserService;

@Controller
@RequestMapping("/user")
// /user/**
public class UserController {
    private static Logger log=LoggerFactory.getLogger(UserController.class);
     @Resource
     private IUserService userService;     

    // /user/test?id=1
    @RequestMapping(value="/test",method=RequestMethod.GET)
    public String test(HttpServletRequest request,Model model){
        int userId = Integer.parseInt(request.getParameter("id"));
        System.out.println("userId:"+userId);
        User user=null;
        if (userId==1) {
             user = new User();
             user.setAge(11);
             user.setId(1);
             user.setPassword("123");
             user.setUserName("javen");
        }

        log.debug(user.toString());
        model.addAttribute("user", user);
        return "index";
    }  

    // /user/showUser?id=1
    @RequestMapping(value="/showUser",method=RequestMethod.GET)
    public String toIndex(HttpServletRequest request,Model model){
        int userId = Integer.parseInt(request.getParameter("id"));
        System.out.println("userId:"+userId);
        User user = this.userService.getUserById(userId);
        log.debug(user.toString());
        model.addAttribute("user", user);
        return "showUser";
    }  

 // /user/showUser2?id=1
    @RequestMapping(value="/showUser2",method=RequestMethod.GET)
    public String toIndex2(@RequestParam("id") String id,Model model){
        int userId = Integer.parseInt(id);
        System.out.println("userId:"+userId);
        User user = this.userService.getUserById(userId);
        log.debug(user.toString());
        model.addAttribute("user", user);
        return "showUser";
    }  

    // /user/showUser3/{id}
    @RequestMapping(value="/showUser3/{id}",method=RequestMethod.GET)
    public String toIndex3(@PathVariable("id")String id,Map<String, Object> model){
        int userId = Integer.parseInt(id);
        System.out.println("userId:"+userId);
        User user = this.userService.getUserById(userId);
        log.debug(user.toString());
        model.put("user", user);
        return "showUser";
    }  

 // /user/{id}
    @RequestMapping(value="/{id}",method=RequestMethod.GET)
    public @ResponseBody User getUserInJson(@PathVariable String id,Map<String, Object> model){
        int userId = Integer.parseInt(id);
        System.out.println("userId:"+userId);
        User user = this.userService.getUserById(userId);
        log.info(user.toString());
        return user;
    }  

    // /user/{id}
    @RequestMapping(value="/jsontype/{id}",method=RequestMethod.GET)
    public ResponseEntity<User>  getUserInJson2(@PathVariable String id,Map<String, Object> model){
        int userId = Integer.parseInt(id);
        System.out.println("userId:"+userId);
        User user = this.userService.getUserById(userId);
        log.info(user.toString());
        return new ResponseEntity<User>(user,HttpStatus.OK);
    } 

    //文件上传、
    @RequestMapping(value="/upload")
    public String showUploadPage(){
        return "user_admin/file";
    }

    @RequestMapping(value="/doUpload",method=RequestMethod.POST)
    public String doUploadFile(@RequestParam("file")MultipartFile file) throws IOException{
        if (!file.isEmpty()) {
            log.info("Process file:{}",file.getOriginalFilename());
        }
        FileUtils.copyInputStreamToFile(file.getInputStream(), new File("E:\\",System.currentTimeMillis()+file.getOriginalFilename()));
        return "succes";
    }
}

3.4.6、新建jsp页面

file.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
    <h1>上传文件</h1>
    <form method="post" action="/user/doUpload" enctype="multipart/form-data">
        <input type="file" name="file"/>
        <input type="submit" value="上传文件"/>

    </form>
</body>
</html>

index.jsp

<html>
<body>
<h2>Hello World!</h2>
</body>
</html>

showUser.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>测试</title>
  </head>  

  <body>
    ${user.userName}
  </body>
</html>

至此，完成Spring+SpingMVC+mybatis这三大框架整合完成。

3.4.7、部署项目

输入地址：http://localhost/user/jsontype/2

项目下载地址：https://github.com/Javen205/SSM

参考博客：https://www.jb51.net/article/125921.htm

以上就是SSM框架整合之Spring+SpringMVC+MyBatis实践步骤的详细内容，更多关于SSM框架的资料请关注我们其它相关文章！

以上就是SSM框架整合之Spring+SpringMVC+MyBatis实践步骤的详细内容，更多关于SSM框架的资料请关注我们其它相关文章！