如何使用Web服务并将其从Java类返回到JSP

Posted 2021-04-02

我正在尝试开发一种小型软件，将来自表单的输入转换为使用Web服务转换器来处理温度的类。我只是可以得到如何调用函数以及将这些参数传递给WS函数的方法，以及我的表单是否正确完成。有人可以验证到目前为止我做了什么吗？

这是我的JSP表单：

<form name="converter" class="form-group" method="get" action="WSTutorial">
              <label>Input</label><br>
              <input type="text" name="temperature"/><br><br>
              <label>From:</label><br>
              <select name="fromUnit">
                  <option value="celsius">Celsius</option>
                  <option value="fahrenheit">Fahrenheit</option>
              </select><br>
              <label>To:</label><br>
              <select name="toUnit">
                  <option value="celsius">Celsius</option>
                  <option value="fahrenheit">Fahrenheit</option>
              </select><br><br>
              <input type="submit" value="Convert" class="btn btn-info"/>
          </form>

这是java类：

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class WSTutorial {


    private int temp;
    private String fromUnit;
    private String toUnit;


    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        PrintWriter out = response.getWriter();
    response.setContentType("text/html");

        temp = Integer.parseInt(request.getParameter("temperature"));
    fromUnit = request.getParameter("fromUnit");
    toUnit = request.getParameter("toUnit");


    }

    private static double convertTemp(java.lang.String temperature, java.lang.String fromUnit, java.lang.String toUnit) {
        net.webservicex.ConvertTemperature service = new net.webservicex.ConvertTemperature();
        net.webservicex.ConvertTemperatureHttpGet port = service.getConvertTemperatureHttpGet();
        return port.convertTemp(temperature, fromUnit, toUnit);
    }



}

调用此函数的正确方法是什么？我的参数是否与所需的函数参数匹配？

谢谢

答案

我猜它看起来像这样：

表单操作称为servlet

<form name="converter" class="form-group" method="get" action="/WSTutorial">
              <label>Input</label><br>
              <input type="text" name="temperature"/><br><br>
              <label>From:</label><br>
              <select name="fromUnit">
                  <option value="celsius">Celsius</option>
                  <option value="fahrenheit">Fahrenheit</option>
              </select><br>
              <label>To:</label><br>
              <select name="toUnit">
                  <option value="celsius">Celsius</option>
                  <option value="fahrenheit">Fahrenheit</option>
              </select><br><br>
              <input type="submit" value="Convert" class="btn btn-info"/>
          </form>

WSTutorial扩展了HttpServlet：

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class WSTutorial extends HttpServlet {


    private int temp;
    private String fromUnit;
    private String toUnit;

    public void init() throws ServletException {
    // Do required initialization

    }


    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        PrintWriter out = response.getWriter();
        response.setContentType("text/html");

        temp = Integer.parseInt(request.getParameter("temperature"));
        fromUnit = request.getParameter("fromUnit");
        toUnit = request.getParameter("toUnit");

         out.println("<h1> Temp is " + convertTemp(temp ,fromUnit,toUnit) + "</h1>");
out.close();
        }

    private static double convertTemp(java.lang.String temperature, java.lang.String fromUnit, java.lang.String toUnit) {
        net.webservicex.ConvertTemperature service = new net.webservicex.ConvertTemperature();
        net.webservicex.ConvertTemperatureHttpGet port = service.getConvertTemperatureHttpGet();
        return port.convertTemp(temperature, fromUnit, toUnit);
    }

}

servlet在qazxsw poi中定义

web.xml