敏感字词过滤及错误拼写纠正过滤器

HttpCharacterResponseWrapper.Java

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

import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
public class HttpCharacterResponseWrapper extends HttpServletResponseWrapper {

    private CharArrayWriter charArrayWriter = new CharArrayWriter();
    public HttpCharacterResponseWrapper(HttpServletResponse response) {
       super(response);
       // TODO Auto-generated constructor stub
    }
    @Override
    public PrintWriter getWriter() throws IOException {
       // TODO Auto-generated method stub
       return new PrintWriter(charArrayWriter);
    }
    public CharArrayWriter getCharArrayWriter() {
       return charArrayWriter;
    }


}

OutoutReplaceFilter.java

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
//import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.Properties;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
public class OutoutReplaceFilter implements Filter {
    private Properties pp = new Properties();

    @Override
    public void destroy() {
       // TODO Auto-generated method stub

    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse res,
           FilterChain chain) throws IOException, ServletException {
       // TODO Auto-generated method stub
       req.setCharacterEncoding("utf-8");
       res.setCharacterEncoding("utf-8");
       // OutputStream out = null;
       HttpCharacterResponseWrapper response = new HttpCharacterResponseWrapper(
              (HttpServletResponse) res);
       response.setCharacterEncoding("utf-8");
       PrintWriter out = res.getWriter();
       chain.doFilter((ServletRequest) req, response);
       String output = response.getCharArrayWriter().toString();
       for (Object obj : pp.keySet()) {
           String key = (String) obj;
           output = output.replace(key, pp.getProperty(key));
       }
       out.write(output);
       // out = res.getOutputStream();
       // out.write(output.getBytes());
       // out.println("<!-- Generated at " + new java.util.Date() + " -->");
       // out.close();
    }

    @Override
    public void init(FilterConfig config) throws ServletException {
       // TODO Auto-generated method stub
       String file = config.getInitParameter("file");
       String realPath = config.getServletContext().getRealPath(file);
       try {
           pp.load(new FileInputStream(realPath));
       } catch (FileNotFoundException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (IOException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
    }

}

sensitive.properties

# 自动更正
Chna = China
www.linfenliang.cn = www.linfenliang.cn.vc
#自动替换
\色\情 = **
\情\色=**
\赌\博=**
TMD=***


web.xml

<!-- 敏感字替换器 -->
    <filter>
       <filter-name>OutoutReplaceFilter</filter-name>
       <filter-class>org.com.util.OutoutReplaceFilter</filter-class>
       <init-param>
           <param-name>file</param-name>
           <param-value>/WEB-INF/sensitive.properties</param-value>
       </init-param>
    </filter>
    <filter-mapping>
       <filter-name>OutoutReplaceFilter</filter-name>
       <url-pattern>/*</url-pattern>
    </filter-mapping>