首先上效果图
对于处理乱码主要分为三步第一步在Servlet获取输出流之前设置编码方式utf-8或者gbk
第二步在jsp中设置，第三步通过新建一个过滤器在web.xml里面配置。
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();//获得对象的输出流
String name=request.getParameter("uname");
String pwd=request.getParameter("password");
UserDao dao=new UserDaoImpl();
UserInfo info=dao.getUserByUserPwd(name, pwd);
String str="";
if(info!=null){
str="登录成功";
Cookie username=new Cookie("uname",URLEncoder.encode(name, "utf-8"));
username.setMaxAge(200);
response.addCookie(username);
Cookie upwd=new Cookie("password",pwd);
upwd.setMaxAge(200);
response.addCookie(upwd);
HttpSession session=request.getSession();//获取Session对象
session.setAttribute("loginUser", info);
response.sendRedirect("servlet/success.jsp");
//rd.forward(request, response);
}else{
str="登录失败";
str=URLEncoder.encode(str,"utf-8");
// doGet(request, response);
response.sendRedirect("servlet/login.jsp?error="+str);//重定向
}
out.flush();
out.close();
}
然后jsp页面
String error = new String(request.getParameter("error").getBytes("ISO8859-1"),"utf-8");
if (error != null) {
%>
<tr>
<td colspan="2"><%=error%></td>
</tr>
<%
}
%>
这样就ok了
自定义过滤器
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
filter.doFilter(request, response);
最后别忘了在web.xml里面配置
<filter>
<filter-name>CharsetFilter</filter-name>
<filter-class>filter.CharsetFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CharsetFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>