我是Web服务jsps和servlets的新手,我有这个非常简单的例子只是为了理解事情是如何工作的。
首先,我有这个简单的网络服务:
package com.sav.calculator;
import javax.jws.WebService;
import javax.jws.WebMethod;
import javax.jws.WebParam;
@WebService(serviceName = "CalculatorWS")
public class CalculatorWS {
@WebMethod(operationName = "add")
public int add(@WebParam(name = "i") int i, @WebParam(name = "j") int j) {
int k = i + j;
return k;
}
}
然后,我在客户端应用程序中使用此 Web 服务。我试图以正确的方式工作,所以我将数据从 jsp 发送到 servlet,在 servlet 中进行计算,并将数据发送到另一个 jsp 中以进行演示。但问题是为什么我没有做对?
这是第一个JSP(只是一个HTML表单):
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<form method="POST" action="ClientServlet">
<input type="text" name="j"/>
<input type="text" name="i"/>
<input type="submit" value="submit"/>
</form>
</body>
</html>
这是我使用我的添加网络方法的 servlet:
package com.sav.calculator.client;
import com.sav.calculator.CalculatorWS_Service;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.ws.WebServiceRef;
@WebServlet(name = "ClientServlet", urlPatterns = {"/ClientServlet"})
public class ClientServlet extends HttpServlet {
@WebServiceRef(wsdlLocation = "WEB-INF/wsdl/localhost_8080/CalculatorWSApplication/CalculatorWS.wsdl")
private CalculatorWS_Service service;
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
doPost(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
int i = (int) request.getAttribute("i");
int j = (int) request.getAttribute("j");
int k = add(i, j);
request.setAttribute("k",k);
RequestDispatcher dispatcher = this.getServletContext().getRequestDispatcher("newjsp2.jsp");
dispatcher.forward(request, response);
}
@Override
public String getServletInfo() {
return "Short description";
}
private int add(int i, int j) {
com.sav.calculator.CalculatorWS port = service.getCalculatorWSPort();
return port.add(i, j);
}
}
newjsp2只是一个hello world页面,我只是想先到达那里,但我得到的是:那。
服务服务器后,在 Web 浏览器中键入地址:
http://localhost:8080/CalculatorWSApplication/CalculatorWS.wsdl
如果此地址包含 wsdl(XML 格式),则将其用作 wsdlLocation。
也可以尝试一些工具,如SoapUI或其他工具。
从 Servlet 到 JSP
您可以在将请求转发到 jsp 之前在响应对象中设置值。或者,您可以将值放入会话 Bean 中并在 jsp 中访问它。
从JSP到Servlet
您需要提交表单并将参数作为输入传递。一个例子...
<form method="Post" action="path/to/servlet">
<input type="text" name="x" />
<input type="password" name="xx" />
<input type="hidden" name="xxx" value="zzz" />
<input type='submit' />
</form>