import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.IOException;
import java.io.IOException;
@WebFilter(filterName = "WordFilter",urlPatterns = "/MessageServlet",initParams ={
@WebInitParam(name="encoding",value = "UTF-8")
} )
public class WordFilter implements Filter {
// 非法字符数组
private String words[];
// 字符编码
private String encoding;
@Override
public void init(FilterConfig filterConfig) throws ServletException {
//获取字符编码
encoding = filterConfig.getInitParameter("encoding");
//初始化非法字符数组
words= new String[]{"糟糕","混蛋"};
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
// 判断字符编码是否有效
if (encoding != null){
// 设置request字符编码
request.setCharacterEncoding(encoding);
//将request转换为重写后的Request对象
request= new Request((HttpServletRequest) request);
//设置response字符编码
response.setContentType("text/html;charset="+encoding);
}chain.doFilter(request,response);
}
@Override
public void destroy() {
Filter.super.destroy();
this.words = null;
this.encoding = null;
}
class Request extends HttpServletRequestWrapper{
public Request(HttpServletRequest request) {
super(request);
}
//重写getParameer()方法
@Override
public String getParameter(String name) {
return filter(super.getParameter(name));
}
/*@Override
public String[] getParameterValues(String name) {
//获取所有参数值
String[] values = super.getParameterValues(name);
// 通过循环对所有参数值进行过滤
for (int i = 0; i < values.length; i++) {
values[i] = filter(values[i]);
}
//返回过滤后的参数值
return values;
}*/
}
public String filter(String param){
try{
//判断非法字符是否被初始化
if (words != null && words.length > 0){
// 循环替换非法字符
for (int i = 0; i < words.length; i++) {
//判断是否包含非法字符
if (param.indexOf(words[i])!=-1){
//将非法字符替换为"****"
param = param.replaceAll(words[i], "****");
}
}
}
}catch (Exception e){
e.printStackTrace();
}
return param;
}
}
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet(name = "MessageServlet",urlPatterns = "/MessageServlet")
public class MessageServlet extends HttpServlet {
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// 获取标题
String title = req.getParameter("title");
// 获取内容
String content = req.getParameter("content");
// 将标题放置到request中
req.setAttribute("title", title);
// 将内容放置到request中
req.setAttribute("content", content);
//转发到result.jsp页面
req.getRequestDispatcher("wordFilter.jsp").forward(req,resp);
}
}
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2024/4/24
Time: 9:45
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>意见反馈</title>
<style type="text/css">
body {
margin: 0px;
font-size: 12px;
}
td{
font-size: 12px;
}
.div1{
width: 1003px;
height: 707px;
background-image: url("images/bg.jpg");
}
.div2{
width: 500px;
margin-top:245px;
margin-left:180px;
text-align:left;
}
.tl{
width: 500px;
height: 20px;
font-weight: bold;
background: #A3C0C6;
padding: 5px;
}
.ct{
width: 500px;
padding-left: 30px;
padding-top: 5px;
padding-bottom: 5px;
}
.tt{
margin-left:5px;
width: 70px;
background: #A3C0C6;
padding: 5px;
font-weight: bold;
font-size: 13px;
}
</style>
</head>
<body>
<div align="center">
<div class="div1">
<div class="div2">
<%
String title = (String) request.getAttribute("title");
String content = (String)request.getAttribute("content");
if(title != null && !title.isEmpty()){
out.println("<span class='tl'>" + title + "</span>");
}
if(content != null && !content.isEmpty()){
out.println("<span class='ct'>" + content + "</span>");
}
%>
<span class="tl">谢谢你们</span>
<span class="ct">你们的公司服务态度非常好，谢谢你们！</span>
<span class="tl">谢谢你们</span>
<span class="ct">你们的公司服务态度非常好<br>但部分客服服务态度还要加强！</span>
<form action="MessageServlet" method="post">
<span class="tt">意见反馈</span>
<table border="0" width="500" align="center">
<tr>
<td align="right">标 题：</td>
<td><input type="text" name="title" size="30"></td>
</tr>
<tr>
<td align="right">内 容：</td>
<td>
<textarea rows="5" cols="40" name="content"></textarea>
</td>
</tr>
<tr>
<td align="center" colspan="2">
<input type="submit" value="提 交">
</td>
</tr>
</table>
</form>
</div>
</div>
</div>
</body>
</html>
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