restfull环境搭建-helloword（二）

原文地址：http://only81.iteye.com/blog/1689537

本文描述，获取XML或json格式数据

首先，创建一个bean，比如Todo（JAXB自动将bean文件，转换成xml或者json，需要添加@XmlRootElement）

package sample.hello.resources.bean;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Todo {
    private String summary;
    private String description;
    public String getSummary() {
        return summary;
    }
    public void setSummary(String summary) {
        this.summary = summary;
    }
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }
    

}

创建对应的resource

package sample.hello.resources;

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

import sample.hello.resources.bean.Todo;

@Path("todo")
public class TodoResource {

    @GET
    @Produces({MediaType.APPLICATION_XML,MediaType.APPLICATION_JSON})
    public Todo getXml(){
        Todo todo = new Todo();
        todo.setSummary("This is first todo");
        todo.setDescription("This is my first todo");
        return todo;
    }
    
    @GET
    @Produces({MediaType.TEXT_XML})
    public Todo getHtml(){
        Todo todo = new Todo();
        todo.setSummary("This is first todo");
        todo.setDescription("This is my first todo");
        return todo;
    }
}

对应的web.xml，配置如下：

<?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" id="WebApp_ID" version="3.0">
  <display-name>Restfull</display-name>
  <welcome-file-list>
    <welcome-file>index.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>sample.hello.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>

到此为止，服务器端程序，创建完毕。

客户端取xml或json数据程序：

package sample.hello.resources.client;

import java.net.URI;

import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.UriBuilder;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;

public class TodoTest {

    public static void main(String[] args) {
        ClientConfig config = new DefaultClientConfig();
        Client client = Client.create(config);
        WebResource service = client.resource(getBaseURI());
        System.out.println(service.path("rest").path("todo").accept(MediaType.TEXT_XML).get(String.class));
        System.out.println("....");
        System.out.println(service.path("rest").path("todo").accept(MediaType.APPLICATION_JSON).get(String.class));
        // Get JSON for application
        System.out.println("....");
        System.out.println(service.path("rest").path("todo").accept(MediaType.APPLICATION_XML).get(String.class));

    }
    
    private static URI getBaseURI(){
        return UriBuilder.fromUri("http://localhost:8080/Restfull").build();
    }

}