从客户端

Question

我想从我的Rest Web Service创建的XML输出中获取属性值，但是在我的Java客户端中没有标记。我尝试过XPath，但它似乎不能使用URL，只能使用存储在驱动器中的XML文件。关于XPath的所有答案都专门用于存储的XML文件而不是在线。我正在使用Netbeans。概念是，Web服务需要两个数字并将总和作为XML提供。我在此示例http://localhost:8080/WSDemo/rest/book/5/2

中使用的Webservice网址

休息网络服务

ApplicationConfig.java

package wbs;

import java.util.Set;
import javax.ws.rs.core.Application;
import javax.xml.bind.annotation.XmlRootElement;

@javax.ws.rs.ApplicationPath("rest")
public class ApplicationConfig extends Application {

@Override
public Set<Class<?>> getClasses() {
    Set<Class<?>> resources = new java.util.HashSet<>();
    addRestResourceClasses(resources);
    return resources;
}


private void addRestResourceClasses(Set<Class<?>> resources) {
    resources.add(wbs.GenericResource.class);
}

}

GenericResource.java

package wbs;

import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.Produces;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.MediaType;
import javax.xml.bind.annotation.XmlRootElement;

@Path("book")
public class GenericResource {

@Context

private UriInfo context;
@GET
@Produces(MediaType.APPLICATION_XML)
@Path("{n1}/{n2}")
public String getSum(@PathParam ("n1") int a, @PathParam ("n2") int b) {
    int c = a+b;
    return "<Sum>" + c + "</Sum>";

}

}

客户端

Sum.java

package restclient;

import javax.ws.rs.ClientErrorException;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.WebTarget;



public class Sum {
  private WebTarget webTarget;
  private Client client;
  private static final String BASE_URI = "http://localhost:8080/WSDemo/rest/";

  public Sum(){
    client = javax.ws.rs.client.ClientBuilder.newClient();
    webTarget = client.target(BASE_URI).path("book");
  }

public <T> T getSum(Class<T> responseType, String n1, String n2) throws ClientErrorException {
    WebTarget resource = webTarget;
    resource = resource.path(java.text.MessageFormat.format("{0}/{1}", new Object[]{n1, n2}));
    return resource.request(javax.ws.rs.core.MediaType.APPLICATION_XML).get(responseType);
}

public void putXml(Object requestEntity) throws ClientErrorException {
    webTarget.request(javax.ws.rs.core.MediaType.APPLICATION_XML).put(javax.ws.rs.client.Entity.entity(requestEntity, javax.ws.rs.core.MediaType.APPLICATION_XML));
}

public void close() {
    client.close();
}
}

RestClient.java

package com.emmanouil;

import restclient.Sum;

public class RestClient {

    public static void main(String[] args) {
    Sum client = new Sum();
    String response = client.getSum (String.class,"5" , "2");
    System.out.println(response);
    client.close();

}
}

输出

我想清除标签并获得结果（在这种情况下为7）。当然，我可以修剪弦乐或任何其他类似的方式，但它是我不想做的事情。