springmvc rest服务deom实例详解编程语言

服务实现功能如下:

spring rest服务:
1.GetClient和GetController,Spring mvc rest template的get方法使用demo.
2.PostClient和PostController,Spring mvc rest template的post方法使用demo.
3.FileUploadClient和FileUploadController,Spring mvc rest template向服务器上传文件demo.

闲话少说,这是一个web服务，所以先看web.xml,

    <?xml version="1.0" encoding="UTF-8"?>   
    <web-app version="2.5"    
        xmlns="http://java.sun.com/xml/ns/javaee"    
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    
        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee    
        http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">   
      <display-name></display-name>    
        <!-- 配置spring mvc的主控servlet -->   
        <servlet>   
            <servlet-name>springmvc</servlet-name>   
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>   
        </servlet>   
       
        <!-- 配置spring mvc处理的url -->   
        <servlet-mapping>   
            <servlet-name>springmvc</servlet-name>   
            <url-pattern>*.mvc</url-pattern>   
        </servlet-mapping>   
    </web-app>  

然后看，springmvc对应的配置文件:

<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"     
    xsi:schemaLocation="http://www.springframework.org/schema/beans      
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd     
        http://www.springframework.org/schema/context      
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">     
           
    <!-- spring mvc需要一个自己的配置文件,此配置文件的名字和web.xml文件中关于spring mvc相关的servlet的   
    servlet name有一个契约,必须采用<servlet-name>-servlet.xml -->   
    <!-- 扫描controller包, 将标注spring注解的类自动转化为bean, 同时完成bean的注入 -->   
    <context:component-scan base-package="com.ilucky.springmvc.rest.controller" />    
       
    <!-- 配置springmvc视图解析器 -->   
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">   
        <property name="viewClass">   
            <value>org.springframework.web.servlet.view.JstlView</value>   
        </property>   
        <property name="prefix">   
            <value>/</value>   
        </property>   
        <property name="suffix">   
            <value>.jsp</value>   
        </property>   
    </bean>   
       
    <!-- 设置上传文件的最大尺寸为100MB -->   
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">   
        <property name="maxUploadSize">   
            <value>102400000</value>   
        </property>   
    </bean>    
  </beans> 

马上看get实例：

    package com.ilucky.springmvc.rest.controller;   
       
    import org.springframework.web.client.RestTemplate;   
       
    /**  
     * 测试Spring Rest的Get方法.  
     * @author IluckySi  
     * @since 20141107  
     */   
    public class GetClient {   
           
        public static void main (String[] args) {   
            String url = "http://localhost:8080/spring-rest/get.mvc?test=get";   
            RestTemplate rest = new RestTemplate();   
            Object result = rest.getForObject(url, String.class);   
            System.out.println("测试Spring Rest的Get方法: " + result);   
        }   
    }  

    package com.ilucky.springmvc.rest.controller;   
       
    import java.io.PrintWriter;   
       
    import javax.servlet.http.HttpServletRequest;   
    import javax.servlet.http.HttpServletResponse;   
       
    import org.springframework.context.annotation.Scope;   
    import org.springframework.stereotype.Controller;   
    import org.springframework.web.bind.annotation.RequestMapping;   
    import org.springframework.web.bind.annotation.RequestMethod;   
    import org.springframework.web.bind.annotation.RequestParam;   
       
    /**  
     * 测试Spring Rest的Get方法.  
     * @author IluckySi  
     * @since 20141107  
     */   
    @Controller("getController")   
    @Scope("prototype")   
    public class GetController {   
       
        @RequestMapping(value = "/get", method = RequestMethod.GET)     
        public void get(HttpServletRequest request, HttpServletResponse response,   
                @RequestParam(value = "test", required = true) String test) {   
            System.out.println("测试Spring Rest的Get方法: test = " + test);   
            PrintWriter pw = null;   
            try {   
                response.setContentType("application/xml;charset=utf-8");   
                pw = response.getWriter();   
                pw.write("<result>success</result>");   
            } catch (Exception e) {   
                e.printStackTrace();   
            } finally {   
                pw.close();   
            }   
        }   
    }  

post实例：

    package com.ilucky.springmvc.rest.controller;   
       
    import org.springframework.util.LinkedMultiValueMap;   
    import org.springframework.util.MultiValueMap;   
    import org.springframework.web.client.RestTemplate;   
       
    /**  
     * 测试Spring Rest的Post方法.  
     * @author IluckySi  
     * @since 20141107  
     */   
    public class PostClient {   
           
        @SuppressWarnings({ "rawtypes", "unchecked" })   
        public static void main (String[] args) {   
            String url = "http://localhost:8080/spring-rest/post.mvc";   
            RestTemplate rest = new RestTemplate();   
            MultiValueMap<String, Object> param = new LinkedMultiValueMap();   
            param.add("test", "post");   
            Object result = rest.postForObject(url, param, String.class);   
            System.out.println("测试Spring Rest的Post方法: " + result);   
        }   
    }  

    package com.ilucky.springmvc.rest.controller;   
       
    import java.io.PrintWriter;   
       
    import javax.servlet.http.HttpServletRequest;   
    import javax.servlet.http.HttpServletResponse;   
       
    import org.springframework.context.annotation.Scope;   
    import org.springframework.stereotype.Controller;   
    import org.springframework.web.bind.annotation.RequestMapping;   
    import org.springframework.web.bind.annotation.RequestMethod;   
    import org.springframework.web.bind.annotation.RequestParam;   
       
    /**  
     * 测试Spring Rest的Post方法.  
     * @author IluckySi  
     * @since 20141107  
     */   
    @Controller("postController")   
    @Scope("prototype")   
    public class PostController {   
       
        @RequestMapping(value = "/post", method = RequestMethod.POST)     
        public void post(HttpServletRequest request, HttpServletResponse response,   
                @RequestParam(value = "test", required = true) String test) {   
            System.out.println("测试Spring Rest的Post方法: test = " + test);   
            PrintWriter pw = null;   
            try {   
                response.setContentType("application/xml;charset=utf-8");   
                pw = response.getWriter();   
                pw.write("<result>success</result>");   
            } catch (Exception e) {   
                e.printStackTrace();   
            } finally {   
                pw.close();   
            }   
        }   
    }  

上传文件实例:

    package com.ilucky.springmvc.rest.controller;   
       
    import java.io.File;   
       
    import org.springframework.core.io.FileSystemResource;   
    import org.springframework.util.LinkedMultiValueMap;   
    import org.springframework.util.MultiValueMap;   
    import org.springframework.web.client.RestTemplate;   
       
    /**  
     * 测试Spring Rest的文件上传.  
     * @author IluckySi  
     * @since 20141107  
     * 注意:使用Spring Rest进行文件上传,  
     * 需要在spring mvc对应的配置文件中,做如下配置:  
     * <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
            <property name="maxUploadSize">  
                <value>102400000</value>  
            </property>  
        </bean>  
        否则会报如下异常:  
        resulted in 400 (Bad Request); invoking error handler  
     */   
    public class FileUploadClient {   
           
        @SuppressWarnings({ "rawtypes", "unchecked" })   
        public static void main(String[] args) {   
            String url = "http://localhost:8080/spring-rest/fileUpload.mvc";   
            String filePath = "E://fileUpload.zip";   
            RestTemplate rest = new RestTemplate();   
            FileSystemResource resource = new FileSystemResource(new File(filePath));   
            MultiValueMap<String, Object> param = new LinkedMultiValueMap();   
            param.add("fileName", "fileUpload.zip");    
            param.add("file", resource);     
            Object result = rest.postForObject(url, param, String.class);   
            System.out.println("测试Spring RestT的文件上传: " + result);   
        }   
    }  

    package com.ilucky.springmvc.rest.controller;   
       
    import java.io.File;   
    import java.io.PrintWriter;   
       
    import javax.servlet.http.HttpServletRequest;   
    import javax.servlet.http.HttpServletResponse;   
       
    import org.springframework.context.annotation.Scope;   
    import org.springframework.stereotype.Controller;   
    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.multipart.MultipartFile;   
       
    /**  
     * 测试Spring Rest的文件上传.  
     * @author IluckySi  
     * @since 20141107  
     */   
    @Controller("fileUploadController")   
    @Scope("prototype")   
    public class FileUploadController {   
           
        @RequestMapping(value = "/fileUpload", method = RequestMethod.POST)   
        public void fileUpload(HttpServletRequest request, HttpServletResponse response,   
                @RequestParam(value = "fileName", required = true) String fileName,   
                @RequestParam(value = "file", required = true) MultipartFile file) {   
            System.out.println("文件名称是: " + fileName);   
            PrintWriter pw = null;   
            try {   
                //将文件写入目标文件,如果有文件服务器,可以将其写到固定的文件服务器上,测试:写到本地文件.   
                File server = new File("E://" + fileName);   
                file.transferTo(server);   
                response.setContentType("application/xml;charset=utf-8");   
                pw = response.getWriter();   
                pw.write("<result>success</result>");   
                System.out.println("测试Spring Rest的文件上传");   
            } catch (Exception e) {   
                e.printStackTrace();   
            } finally {   
                pw.close();   
            }   
        }     
    }  

ok! 完工！spring mvc 的rest你学会使用了吗！