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package coreservlets; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import java.util.*; /** Shows all the parameters sent to the servlet via either * GET or POST. Specially marks parameters that have * no values or multiple values. * <P> * Taken from Core Servlets and JavaServer Pages * from Prentice Hall and Sun Microsystems Press, * http://www.coreservlets.com/. * © 2000 Marty Hall; may be freely used or adapted. */ public class ShowParameters extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); String title = "Reading All Request Parameters"; out.println(ServletUtilities.headWithTitle(title) + "<BODY BGCOLOR="#FDF5E6">n" + "<H1 ALIGN=CENTER>" + title + "</H1>n" + "<TABLE BORDER=1 ALIGN=CENTER>n" + "<TR BGCOLOR="#FFAD00">n" + "<TH>Parameter Name<TH>Parameter Value(s)"); Enumeration paramNames = request.getParameterNames(); while(paramNames.hasMoreElements()) { String paramName = (String)paramNames.nextElement(); out.print("<TR><TD>" + paramName + "n<TD>"); String[] paramValues = request.getParameterValues(paramName); if (paramValues.length == 1) { String paramValue = paramValues[0]; if (paramValue.length() == 0) out.println("<I>No Value</I>"); else out.println(paramValue); } else { out.println("<UL>"); for(int i=0; i<paramValues.length; i++) { out.println("<LI>" + paramValues); } out.println("</UL>"); } } out.println("</TABLE>n</BODY></HTML>"); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } } 返回类别: 教程 上一教程: SmartUpload在servlet中使用方式 下一教程: 使用Eclipse开发Jsp 您可以阅读与"jsp源码实例2（获取表单参数）"相关的教程: · JSP源码实例2(获取表单参数) · jsp源码实例3（获取jsp各种参数） · JSP源码实例3(获取JSP各种参数) · JSP源码实例 · JSP源码实例4(搜索引擎) |
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