showparameters.java

来自「learning java的源代码。书中每个实例都有相关的代码example。」· Java 代码 · 共 36 行

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//file: ShowParameters.javaimport java.io.*;import javax.servlet.ServletException;import javax.servlet.http.*;import java.util.Enumeration;public class ShowParameters extends HttpServlet {    public void doGet(HttpServletRequest request,                      HttpServletResponse response)      throws ServletException, IOException {        showRequestParameters( request, response );    }    void showRequestParameters(HttpServletRequest request,                               HttpServletResponse response)      throws IOException {        response.setContentType("text/html");        PrintWriter out = response.getWriter(  );        out.println(          "<html><head><title>Show Parameters</title></head><body>"          + "<h1>Parameters</h1><ul>");        for ( Enumeration e=request.getParameterNames(  );              e.hasMoreElements(  ); ) {            String name = (String)e.nextElement(  );            String value = request.getParameter( name );            if (! value.equals("") )                out.println("<li>"+ name +" = "+ value );        }        out.close(  );    }}

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