直接上代码：
package pp;
import java.io.IOException;
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.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebFilter(urlPatterns={"/*"},initParams={@WebInitParam(name="charset",value="utf-8")})
public class EncodeFilter implements Filter {
private String defaultCharset="utf-8";
@Override
public void destroy() {
}
@Override
public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
HttpServletRequest req=(HttpServletRequest)arg0;
req.setCharacterEncoding(defaultCharset);
System.out.println("----------filter--------------");
HttpServletResponse res=(HttpServletResponse)arg1;
res.setCharacterEncoding(defaultCharset);
arg2.doFilter(req, res);
}
@Override
public void init(FilterConfig arg0) throws ServletException {
defaultCharset=arg0.getInitParameter("charset");
System.out.println(defaultCharset+"---------------");
}
}
package pp;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings("all")
@WebServlet(urlPatterns={"/abc.do","/def.do"},initParams={@WebInitParam(name="PI",value="2.222222")})
public class UserSevlet extends HttpServlet {
private String value;
public void init() throws ServletException{
value=this.getInitParameter("PI");
}
protected void doGet(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException{
this.doPost(req, resp);
}
protected void doPost(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException{
//首先获取index.jsp的输入值
String account=req.getParameter("account");
System.out.println(account);
req.setAttribute("account", account);
req.getRequestDispatcher("/ok.jsp").forward(req, resp);
}
}
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="<%=basePath%>def.do" method="post">
<input type="text" name="account"/>
<input type="submit" value="注册">
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
您刚才注册信息是：${requestScope.account}
</body>
</html>
工程目录：
