[英]passing parameters between jsp pages and servlets
我是Web服務jsps和servlet的新手,我有這個非常簡單的示例,只是為了了解事物的工作原理。
首先,我有這個簡單的Web服務:
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,我在客戶端應用程序中使用此Web服務。 我試圖以正確的方式工作,所以我將數據從一個jsp發送到servlet,在servlet中進行計算,然后在另一個jsp中將數據發送給演示文稿。.但是問題是為什么我無法正確處理它?
這是第一個jsp(只是html形式):
<%@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>
這是我使用添加web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);
}
}
而newjsp2只是一個世界頁面,我只是想先到達那里,但我得到的是: 那。
啟動Web服務服務器后,在Web瀏覽器中輸入address:
http://localhost:8080/CalculatorWSApplication/CalculatorWS.wsdl
如果此地址包含wsdl(xml格式),則將其用作wsdlLocation 。
也嘗試一些工具,例如SoapUI或其他工具 。
從Servlet到JSP
您可以在將請求轉發到jsp之前將值設置到響應對象中。 或者,您可以將值放入會話bean並在jsp中訪問它。
從JSP到Servlet
您需要提交表單並傳遞參數作為輸入。 一個例子 ...
<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>
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