handlemessage.java

JSP实用教程源代码 本书从开发实践出发

package tom.jiafei;
import java.io.*;
public class HandleMessage
{ String content=null;
  public void setContent(String s)
    {content=s; 
    }    
 //获取属性content的值，为了能显示HTML或JSP源文件，需进行流的处理技术：
 public String getContent()
   { try{ StringReader in=new StringReader(content) ;//指向字符串的字符流。
          PushbackReader push=new PushbackReader(in);
          StringBuffer stringbuffer=new StringBuffer(); 
          int c; 
          char b[]=new char[1];              
          while ( (c=push.read(b,0,1))!=-1)//读取1个字符放入字符数组b。 
            { String s=new String(b);
              if(s.equals("<"))        //回压的条件  
               {  push.unread('&');
                  push.read(b,0,1); //push读出被回压的字符字节,放入数组b.
                  stringbuffer.append(new String(b));
                  push.unread('L');
                  push.read(b,0,1); //push读出被回压的字符字节,放入数组b.
                  stringbuffer.append(new String(b));
                  push.unread('T');
                  push.read(b,0,1); //push读出被回压的字符字节,放入数组b.
                  stringbuffer.append(new String(b));
                }
              else if(s.equals(">"))        //回压的条件  
               {  push.unread('&');
                  push.read(b,0,1); //push读出被回压的字符字节,放入数组b.
                  stringbuffer.append(new String(b));
                  push.unread('G');
                  push.read(b,0,1); //push读出被回压的字符字节,放入数组b.
                  stringbuffer.append(new String(b));
                  push.unread('T');
                  push.read(b,0,1); //push读出被回压的字符字节,放入数组b.
                  stringbuffer.append(new String(b));
               }
              else if(s.equals("\n"))        
               {  stringbuffer.append("<BR>");
               }
              else
               { stringbuffer.append(s);
               }
            }
          push.close();
          in.close();
          return  content=new String(stringbuffer);  
        }
   catch(IOException e)
      {return content=new String("不能读取内容");
      }   
 }
}