用jersey写 java restfull web services 输出xml格式数据

package com.toic.rest;import com.toic.model.Folder;import java.util.logging.Logger;import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;@Path("/folders")
public class RESTService { private Logger logger = Logger.getLogger(RESTService.class.getName()); public RESTService() {
super();
}
// 这个 成功 http://localhost:7001/RESTfull001/folders/sayhello/li
@GET
@Path("sayhello/{name}")
@Produces("text/plain")
public String removeStudent(@PathParam("name") String name) {
String say = name + " said hello!";
return say;
} //http://localhost:7001/RESTfull001/folders/guid/000234
@GET
@Path("/guid/{folderguid}")
//@Produces({MediaType.APPLICATION_XML })
@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON }) public Folder getFoldersByGUID(@PathParam("folderguid") String folderguid) {// 第一种
Folder folder = Folder.makeFolders(); if(!folderguid.equals("")){ for(int i=;i<folder.getChildFolders().size();i++){ if(((Folder)folder.getChildFolders().get(i)).getFolderGUID().equals(folderguid)){ folder=(Folder)folder.getChildFolders().get(i);
} } }
return folder;// 第二种
// Folder rootFolder = new Folder();
// rootFolder.setFolderName("Root Folder");
// rootFolder.setOwner("juan");
// rootFolder.setFolderGUID("000234");
// rootFolder.setFolderType("NATIVE");
// return rootFolder; ////return Response.status(Response.Status.OK).entity(folder).build();
} public static void main(String s[]){
System.out.println(new RESTService().getFoldersByGUID("") );
//调用方法//或者在浏览器输入URL http://localhost:7001/RESTfull001/folders/guid/000234//或者下面在java代码中调用

/////////////////////////////////////////////////////////
// //需要导入下面的lib中jar Oracle\Middleware\Oracle_Home\wlserver\server\lib
// System.out.println("**** ****");
// Client client = ClientBuilder.newClient().register(JacksonJsonProvider.class);// 注册json 支持
// WebTarget target = client.target(url + "/guid/000234");
// Response response = target.request().get();
// Folder folder = response.readEntity(Folder.class);
// System.out.println(folder.getFolderName()+" "+folder.getFolderGUID()+" "+folder.getFolderType()+" "+folder.getOwner());
// response.close();
//
// //打印
// //**** ****
// // Root Folder 000234 NATIVE juan
/////////////////////////////////////////////////////////

//或者如下调用

//com.sun.jersey.api.client.Client client = com.sun.jersey.api.client.Client .create();

//Folder folder =client.resource(url + "/guid/" + "200234").accept(MediaType.APPLICATION_XML_TYPE).get(Folder.class);

//System.out.println(folder.getFolderGUID()+" "+folder.getFolderName()+" "+folder.getFolderType()+" "+folder.getOwner());
//200234 Folder2 NATIVE xiaolu

}
}

package com.toic.model;import java.util.ArrayList;
import java.util.List;import javax.xml.bind.annotation.XmlRootElement;@XmlRootElement
public class Folder { private String folderName; private String owner; private String folderGUID; private String folderType; private List childFolders = new ArrayList(); public Folder() {
super();
}
public String getFolderName() {
return folderName;
}
public void setFolderName(String folderName) {
this.folderName = folderName;
}
public String getOwner() {
return owner;
}
public void setOwner(String owner) {
this.owner = owner;
}
public String getFolderGUID() {
return folderGUID;
}
public void setFolderGUID(String folderGUID) {
this.folderGUID = folderGUID;
}
public String getFolderType() {
return folderType;
}
public void setFolderType(String folderType) {
this.folderType = folderType;
}
public List getChildFolders() {
return childFolders;
}
public void addChildFolder(Folder childFolder) {
this.childFolders.add(childFolder);
} public static Folder makeFolders() { Folder rootFolder = new Folder();
rootFolder.setFolderName("Root Folder");
rootFolder.setOwner("juan");
rootFolder.setFolderGUID("");
rootFolder.setFolderType("NATIVE"); Folder childFolder1 = new Folder(); childFolder1.setFolderName("Folder1");
childFolder1.setOwner("yang");
childFolder1.setFolderGUID("");
childFolder1.setFolderType("NATIVE"); Folder childFolder2 = new Folder(); childFolder2.setFolderName("Folder2");
childFolder2.setOwner("xiaolu");
childFolder2.setFolderGUID("");
childFolder2.setFolderType("NATIVE"); rootFolder.addChildFolder(childFolder1); rootFolder.addChildFolder(childFolder2); return rootFolder;
}
}

<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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>oracle.eclipse.tools.jsffacet</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</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>jersey</servlet-name>
<url-pattern>*</url-pattern>
</servlet-mapping>
</web-app>