servlet中通过request.getRequestDispatcher跳转到jsp页面乱码问题

用户验证Servlet实现

最新推荐文章于 2022-04-21 21:18:50 发布

原创最新推荐文章于 2022-04-21 21:18:50 发布 · 3.1k 阅读

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本文介绍了一个简单的Servlet实现，用于处理用户的登录请求，并通过查询数据库来验证用户的身份。该Servlet使用了doGet和doPost方法来处理HTTP请求，同时考虑了字符编码的问题。

public class ValidateUserServlet extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
doPost(request, response);
out.flush();
out.close();

}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
String userName = request.getParameter("userName");
String userPass = request.getParameter("userPass");
System.out.println("userName"+userName);
System.out.println("userPass"+userPass);
User user = new User();
user.setUserName(userName);
user.setUserPass(userPass);
ValidateUser validaetUser = new ValidateUser();
ResultSet rs = validaetUser.validaetUser(user);

try {
while(rs.next()){
System.out.println(rs.getString(2));
if(rs.getInt(3)==1){
//response.sendRedirect("liulan.jsp");
request.getRequestDispatcher("zhuce.jsp").forward(request, response); //转发后乱码，在doGet 中加上request.setCharacterEncoding("UTF-8");
} //正常
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

out.flush();
out.close();
}