需要的包 ，除了Spring的基础包外还用到json的包，这里的数据传输使用json格式  
客户端和服务端都用到一下的包

 <!-- Spring -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>${org.springframework-version}</version>            <exclusions>                <!-- Exclude Commons Logging in favor of SLF4j -->                <exclusion>                    <groupId>commons-logging</groupId>                    <artifactId>commons-logging</artifactId>                 </exclusion>            </exclusions>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>${org.springframework-version}</version>        </dependency><!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->          <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-core</artifactId>            <version>2.8.1</version>        </dependency>          <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->         <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-databind</artifactId>            <version>2.8.1</version>        </dependency>                 <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->         <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-annotations</artifactId>            <version>2.8.1</version>        </dependency>  

一、服务器端代码如下，主要是提供两个接口@Controller@RequestMapping("/rest")public class RestController {　　//http://localhost:8080/Springmvc/rest/getPerson    @RequestMapping(value=http://www.mamicode.com/"/getPerson",method=RequestMethod.GET)    @ResponseBody    public Person getPerson(Integer id){        System.out.println("getPerson..."+id);        Person p = new Person("tom", 12);        return p;    }    　　//http://localhost:8080/Springmvc/rest/postPerson    @ResponseBody    @RequestMapping(value="/postPerson",method=RequestMethod.POST)    public Person postPerson(@RequestBody Person p){        //@RequestBody用于接收传来的对象，不加的话会接收不到数据        System.out.println("call postPerson :"+p);        return p;    }｝

package com.mvc.rest;import java.io.IOException;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.HttpClients;import com.fasterxml.jackson.core.JsonParseException;import com.fasterxml.jackson.databind.JsonMappingException;import com.fasterxml.jackson.databind.ObjectMapper;import com.mvc.entity.Person;public class MyClient {        /**     * 需要apache的http包和json包     * */    public static void main(String[] args) throws JsonParseException, JsonMappingException, UnsupportedOperationException, IOException {                //HttpClient是Apache的        HttpClient client = HttpClients.createDefault();        HttpGet request = new HttpGet("http://localhost:8080/Springmvc/rest/getPerson?id=1");        request.setHeader("Accept", "application/json");        HttpResponse response = client.execute(request);        HttpEntity entity = response.getEntity();                //利用json的ObjectMapper把请求到的数据转化为对象        ObjectMapper mapper = new ObjectMapper();        Person p =mapper.readValue(entity.getContent(), Person.class);        System.out.println(p);    }}

　　
Spring提供的Rest风格的RestTemplate比Apache的HttpClient操作更方便

　　@Bean(name="restTemplate")    public RestTemplate restTemp(){        return new RestTemplate();    }

　　@Autowired    private RestTemplate re;        @RequestMapping("/testRestTemplate")    public void get(){                //Person p = re.getForObject("http://localhost:8080/Springmvc/rest/getPerson", Person.class);        Person p = re.postForObject("http://localhost:8080/Springmvc/rest/postPerson", new Person("hello",34),Person.class);        //re.put(url, request, urlVariables);        //re.delete(url, urlVariables);                System.out.println("call testRestTemplate  :"+p);    }