/**
*@athor wjh
**/
一:前端留言板note.jsp
<form action="checkLogin_Note" method="post" name="ly_form">
<div style="text-align: center;color:#a53d17;">
<label class="contact"><strong>留言标题:</strong></label>
<input type="text" name="ly_title"/>
</div>
<div style="text-align: center;color:#a53d17;margin-top:10px;">
<div>
<label class="contact"><strong>留言内容:</strong></label>
<textarea rows="5" cols="40" name="ly_content" class="contact_input"></textarea>
</div>
<div id="face">
选择留言头像:<input type="radio" name="pic" value="images/face/pic1.gif" checked="checked" /><img src="images/face/pic1.gif" />
<input type="radio" name="pic" value="images/face/pic2.gif" /><img src="images/face/pic2.gif" />
<input type="radio" name="pic" value="images/face/pic3.gif" /><img src="images/face/pic3.gif" /><br />
<input type="radio" name="pic" value="images/face/pic4.gif" /><img src="images/face/pic4.gif" />
<input type="radio" name="pic" value="images/face/pic5.gif" /><img src="images/face/pic5.gif" />
<input type="radio" name="pic" value="images/face/pic6.gif" /><img src="images/face/pic6.gif" />
<input type="radio" name="pic" value="images/face/pic7.gif" /><img src="images/face/pic7.gif" /><br />
<input type="radio" name="pic" value="images/face/pic8.gif" /><img src="images/face/pic8.gif" />
</div>
<div class="form_row">
<input type="submit" class="register" value="发表留言" />
</div>
</div>
</form>
二:设置过滤器类
public class WordsFilter implements Filter {
private Map<String, String>map = new HashMap<String, String>();
//设置过滤器的配置对象
public void init(FilterConfig config) throws ServletException {
String filePath = config.getInitParameter("filePath");//从配置文件中取得文件的相对路径
ServletContext context = config.getServletContext();
String realPath = context.getRealPath(filePath);//根据相对路径取得绝对路径
try {
FileReader freader = new FileReader(realPath);//根据绝对路径,通过文件流来读取文件
BufferedReader br = new BufferedReader(freader);
String line = null;
while((line=br.readLine()) != null) {
String []str = line.split("=");
map.put(str[0], str[1]);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
//设置过滤器字符编码
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
//乱码处理
request.setCharacterEncoding(“gb2312”);
response.setContentType(“text/html;charset=gb2312”);
HttpServletRequest HttpReq = (HttpServletRequest) request;
HttpReqWrapper hrw = new HttpReqWrapper(HttpReq);
hrw.setMap(map);
chain.doFilter(hrw, response);
}
public void destroy() {
System.out.println("--过滤器的销毁--");
}
}
三:设置过滤器方法类
public class HttpReqWrapper extends HttpServletRequestWrapper {
private Map<String,String> map = null;
public HttpReqWrapper(HttpServletRequest request) {
super(request);
}
//过滤脏话
public String replace(String str){
StringBuffer sb = new StringBuffer(str);
Set<String>keys = this.getMap().keySet();
Iterator<String>it = keys.iterator();
String ss = null;
while(it.hasNext()) {
String key = it.next();
System.out.println("key="+key);
int index = sb.indexOf(key);
System.out.println("index="+index);
if(index != -1) {
if(key != null)
ss = key;
sb.replace(index, index+key.length(), this.getMap().get(key));
}
}
System.out.println("ss="+ss);
System.out.println("过滤后的content="+sb.toString());
if(ss!=null) {
if (sb.toString().indexOf(ss) == -1) {
return sb.toString();
} else {
System.out.println("进来了!");
return replace(sb.toString());
}
}
return sb.toString();
}
// 重写getParameter()方法
public String getParameter(String str) {
System.out.println(“str=”+str);
if(str.equals(“pager.offset”)){
return super.getParameter(str);
}else{
String content = super.getParameter(str);
System.out.println(“还没过滤的content=”+content);
return replace(content);
}
}
public Map<String,String> getMap() {
return map;
}
public void setMap(Map<String,String> map) {
this.map = map;
}
}
四:配置wen.xml
<filter>
<filter-name>WordsFilter</filter-name>
<filter-class>com.lovo.cq.shopping10_1.filter.WordsFilter</filter-class>
<init-param>
<param-name>filePath</param-name>
<param-value>/WEB-INF/word.txt</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>WordsFilter</filter-name>
<url-pattern>/checkLogin_Note</url-pattern>
</filter-mapping>
**
This is the description of my J2EE component
This is the display name of my J2EE component
CheckLogin_Note
com.lovo.cq.shopping10_1.servlet.CheckLogin_Note
CheckLogin_Note
/checkLogin_Note
**
五、留言板过滤字符设置在web-inf下就是word.txt
妈的=**
老子=**
狗日的=*
我日=我*
TMD=*
我靠=我*
贱人=**
滚=*
操=*