calculate_jsp.java

来自「Internet 开发技术分章节代码和自己完成的课程设计全代码（在zuoye文件」· Java 代码 · 共 73 行

package org.apache.jsp;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;

public final class calculate_jsp extends org.apache.jasper.runtime.HttpJspBase
    implements org.apache.jasper.runtime.JspSourceDependent {

  private static java.util.List _jspx_dependants;

  public Object getDependants() {
    return _jspx_dependants;
  }

  public void _jspService(HttpServletRequest request, HttpServletResponse response)
        throws java.io.IOException, ServletException {

    JspFactory _jspxFactory = null;
    PageContext pageContext = null;
    HttpSession session = null;
    ServletContext application = null;
    ServletConfig config = null;
    JspWriter out = null;
    Object page = this;
    JspWriter _jspx_out = null;
    PageContext _jspx_page_context = null;


    try {
      _jspxFactory = JspFactory.getDefaultFactory();
      response.setContentType("text/html; charset=gb2312");
      pageContext = _jspxFactory.getPageContext(this, request, response,
      			null, true, 8192, true);
      _jspx_page_context = pageContext;
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      session = pageContext.getSession();
      out = pageContext.getOut();
      _jspx_out = out;

      out.write("\r\n");
      out.write("<FORM ACTION=\"\" METHOD=\"post\">\r\n");
      out.write("<INPUT TYPE=\"text\" NAME=\"ok\">\r\n");
      out.write("<INPUT TYPE=\"submit\" VALUE=\"计算\">\r\n");
      out.write("</FORM>\r\n");
 String a=request.getParameter("ok");
   if(a==null) a="1";
   try
   {
      double number=Integer.parseInt(a);
      out.println("<BR>计算结果是："+Math.sqrt(number));
   }
   catch(NumberFormatException e)
   {
      out.println("<BR>请输入数字");
   }

      out.write('\r');
      out.write('\n');
    } catch (Throwable t) {
      if (!(t instanceof SkipPageException)){
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0)
          out.clearBuffer();
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
      }
    } finally {
      if (_jspxFactory != null) _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }
}