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📄 login.java

📁 使用J2EE编写的网上商店系统
💻 JAVA
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/*
 * Created on 1999-5-20
 */
package webservice;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URL;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.axis.client.Call;

/**
 * @author 28-9
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */
public class Login extends HttpServlet {
	public void init(ServletConfig config) throws ServletException {
		super.init(config);
		System.out.println("Entering Login.init()");
		System.out.println("Leaving Login.init()");
	}
	public void destroy() {
		super.destroy();
	}
	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		processRequest(request,response);
	}
	/**
	 * @param request
	 * @param response
	 */
	private void processRequest(HttpServletRequest request, HttpServletResponse response) throws IOException {
		System.out.println("Entering Login.processRequest()");
		response.setContentType("text/html");
		PrintWriter out=response.getWriter();
		out.println("<html><title>MyStore Login</title>");
		out.println("<body><b><h2>Welcome to MyStore</h2></b></body>");
		out.print("<body><h2>Login details: UserID is ");
		String username;
		try {
			username = callWebService();
			out.print(username);
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		out.print("</h2></body></html>");
		
		if(out!=null) out.close();
		
		System.out.println("Leaving Login.processRequest()");
	}
	/**
	 * @return
	 */
	private String callWebService() throws Exception {
		Call call=new Call(new URL("http://localhost:8080/axis/services/MyStoreLoginService?wsdl"));
		String username=(String)call.invoke("loginUser", new Object[] {new String("danny"),new String("swdandy")});
		return username;
		
		//Another way to invoke login method
        // Endpoint is used for making the call
/*        String endpoint = "http://localhost:8080/axis/services/MyStoreLoginService";

        // The Service object is the starting point for accessing the web service.
        Service service = new Service();

        // The call object is used to actually invoke the web service.
        Call call = (Call)service.createCall();

        // Sets the call objects endpoint address
        call.setTargetEndpointAddress(endpoint);

        // Sets the operation name associated with this Call object. 
        call.setOperationName(new QName("loginUser"));

        // Calls the object, passing in the username and passwd. The return value is stored as an object.
        Object returnValue = call.invoke(new Object[] { new String("danny") , new String("swdandy") });
        return (String) returnValue;*/

	}
	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		processRequest(request,response);
	}
}

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