ssm框架整合

最新推荐文章于 2024-12-02 09:14:44 发布

@叫我仙人

最新推荐文章于 2024-12-02 09:14:44 发布

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本文链接：https://blog.youkuaiyun.com/qq_42228691/article/details/89675840

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Rod Johnson 在其著作Expert One-On-One J2EE Development and Design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
Spring MVC属于SpringFrameWork的后续产品，已经融合在Spring Web Flow里面。Spring MVC 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apache software foundation 迁移到了google code，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SQL Maps和Data Access Objects（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（Plain Old Java Objects，普通的 Java对象）映射成数据库中的记录。
2、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

2.1、Maven引入需要的JAR包
在pom.xml中引入jar包

4.0.0
com.javen.maven01
maven01
war
0.0.1-SNAPSHOT
maven01 Maven Webapp
http://maven.apache.org

<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>

2.2、整合SpringMVC 2.2.1、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"?>

<!--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>

<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>

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"?>

Archetype Created Web Application

<!-- 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 -->

<!-- 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>

2.2.3、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、UNIX Syslog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。 ![ ](https://img-blog.csdnimg.cn/20190429152645328.png) 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

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

2.2.4、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

2.3 Spring与MyBatis的整合
取消2.2.2 web.xml中注释的代码
2.3.1、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
2.3.2、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"?>

<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>

2.4、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。

2.4.1、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’);

2.4.2、利用MyBatis Generator自动创建代码
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：

2.4.3、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);  
}

}

2.4.4、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));  
}

}
2.4.5、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";
}

}

2.4.6、新建jsp页面
file.jsp

<%@ page language=“java” contentType=“text/html; charset=utf-8”
pageEncoding=“utf-8”%>

Insert title here