poetry_servlet.java

张新曼 精通JSP Web 开发技术与典型应用 随书光盘源码

package ch07;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Poetry_Servlet extends HttpServlet{
    public void doGet(HttpServletRequest request,HttpServletResponse response)
             throws IOException,ServletException{   
    	doPost(request,response);
    }
    public void doPost(HttpServletRequest request,HttpServletResponse response)
             throws IOException,ServletException{  
     
      //  request.setCharacterEncoding("gb2312");                 //第16行
        response.setContentType("text/html; charset=gb2312");   //第17行
       
      
      String poetry=request.getParameter("poetry");
       PrintWriter out = response.getWriter();
       
       poetry=poetry.trim();
       int n=poetry.length();
       if( !( ((n==24)||(n==32) )&&(poetry.charAt(n-1)=='。')&&(poetry.charAt(n/2-1)=='。')))
        {   out.print("<center>"+"请您确定您输入的诗句和及其标点完整正确。");
            out.print("<A   href='Poetry_Input.jsp?'>"+"返回重输"+"</A>"+"<br>" );
            out.print("<br>"+"您输入的诗句字数为Length="+n+"<br>");
            out.print("Format Error");
        }
       
     else {
    	out.print("您所输入的诗句是：" +poetry+"<br>"+"<br>");
    	out.print("生成的另一首诗是："+"<font color=red >");
    	for(int i=n-2;i>n*3/4-1;i--) out.print(poetry.charAt(i));out.print("，");
    	for(int i=n*3/4-2;i>n/2-1;i--)out.print(poetry.charAt(i));out.print("。");
    	for(int i=n/2-2;i>n/4-1;i--)  out.print(poetry.charAt(i));out.print("，");
    	for(int i=n/4-2;i>=0;i--)     out.print(poetry.charAt(i));out.print("。"+"</font>");
    	 out.print("<br>"+"您输入的诗句字数为Length="+n); 
     }  
     }
   }