擷取jsp輸出內容來進行簡繁轉換

1、繁體字轉換工具

用來處理GB2312/BIG5碼字元互相轉換的類.可到網上搜尋

2、filter攔截方法

public class FileCaptureResponseWrapper extends HttpServletResponseWrapper ...{
public static final int OT_NONE = 0, OT_WRITER = 1, OT_STREAM = 2;

private int outputType = OT_NONE;

private ServletOutputStream output = null;
private PrintWriter writer = null;
private ByteArrayOutputStream buffer = null;

public FileCaptureResponseWrapper(HttpServletResponse resp) throws IOException ...{
super(resp);
        buffer = new ByteArrayOutputStream();
    }

public PrintWriter getWriter() throws IOException ...{
if(outputType==OT_STREAM)
throw new IllegalStateException();
else if(outputType==OT_WRITER)
return writer;
else ...{
            outputType = OT_WRITER;
            writer = new PrintWriter(new OutputStreamWriter(buffer, getCharacterEncoding()));
return writer;
        }
    }

public ServletOutputStream getOutputStream() throws IOException ...{
if(outputType==OT_WRITER)
throw new IllegalStateException();
else if(outputType==OT_STREAM)
return output;
else ...{
            outputType = OT_STREAM;
            output = new WrappedOutputStream(buffer);
return output;
        }
    }

public void flushBuffer() throws IOException ...{
if(outputType==OT_WRITER)
            writer.flush();
if(outputType==OT_STREAM)
            output.flush();
    }

public void reset() ...{
        outputType = OT_NONE;
        buffer.reset();
    }

public byte[] toByteArray() throws IOException ...{
        flushBuffer();
return buffer.toByteArray();
    }

}

class WrappedOutputStream extends ServletOutputStream ...{

private ByteArrayOutputStream buffer;

public WrappedOutputStream(ByteArrayOutputStream buffer) ...{
this.buffer = buffer;
    }

public void write(int b) throws IOException ...{
        buffer.write(b);
    }

public byte[] toByteArray() ...{
return buffer.toByteArray();
    }

}

3、web.xml配置

GbAndBig5Filter
zeal.util.GbAndBig5Filter


GbAndBig5Filter
*.shtml


GbAndBig5Filter
*.jsp


GbAndBig5Filter
*.html


GbAndBig5Filter
*.htm

4、過濾器

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
            ServletException ...{

        HttpServletRequest httpRequest = (HttpServletRequest) request;
        HttpServletResponse httpResponse = (HttpServletResponse) response;
        FileCaptureResponseWrapper wrapperResponse = new FileCaptureResponseWrapper(httpResponse);
        chain.doFilter(httpRequest, wrapperResponse);
byte[] bytes=wrapperResponse.toByteArray();
String s="";
try ...{
            s = new String(GB2Big5.getInstance().gb2big5(bytes,"UTF-8"), "BIG5");
        } catch (Exception e) ...{
            e.printStackTrace();
        }


//    response.setContentType("text/html;charset=UTF-8");
        PrintWriter pr = response.getWriter();
        pr.print(s);
        pr.flush();
        pr.close();
    }