servlet中不能使用HttpClient吗?
在servlet中使用HttpClient,包已配置好,编译通过。
package use;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import bean.Stock;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
import java.util.TimerTask;
import java.util.HashMap;
import java.util.Timer;
public class UseServlet extends HttpServlet
{
private HashMap stocks;
[b] private HttpClient httpclient = new HttpClient(new MultiThreadedHttpConnectionManager());[/b]
public void init(ServletConfig config) throws ServletException
{
super.init(config);
}
............
.........
但在网页中调用时,出现错误:
[b]javax.servlet.ServletException: Error instantiating servlet class use.UseServlet[/b]
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
java.lang.Thread.run(Unknown Source)
问题在哪?请帮忙看一下!