jersey构建rest服务返回json数据

1.  eclipse 创建 dynamic web project

2.  将jersey相关jar包放到libs目录下

3. web.xml 增加 jersey 相关内容

<?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_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>restDemo</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>

     <servlet>
	  <servlet-name>Jersey REST Service</servlet-name>
	<servlet-class>
	  com.sun.jersey.spi.container.servlet.ServletContainer
	</servlet-class>
	  <init-param>
	    <param-name>com.sun.jersey.config.property.packages</param-name>
	    <param-value>com.huawei.rest.resources</param-value>
	  </init-param>
	  <load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
	  <servlet-name>Jersey REST Service</servlet-name>
	  <url-pattern>/rest/*</url-pattern>
	</servlet-mapping>

</web-app>

　4. 创建 resource 类

package com.huawei.rest.resources;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.MediaType;  

@Path("/hello")
public class HelloResource {
    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String sayHello() {
        return "hello jersey , first demo" ;
    }  

    @GET
    @Path("/{param}")
    @Produces("text/plain;charset=UTF-8")
    public String sayHelloToUTF8(@PathParam("param") String username) {
        return "Hello " + username;
    }  

    @GET
    @Path("/getuser")
    @Produces(MediaType.APPLICATION_JSON)
    public User getUserJson() {
     User user  = new User();
     user.setAge(27);
     user.setUserid("005");
     user.setUsername("Fmand");
     return user;
    }

}

5. 创建 user 类

package com.huawei.rest.resources;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class User {
	int age;
	String userid;
	String username;
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getUserid() {
		return userid;
	}
	public void setUserid(String userid) {
		this.userid = userid;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
}

6. 运行一下看看效果

源代码下载地址： http://download.csdn.net/detail/mtour/9592162