java服务器端一个小问题，求大神帮忙看看

[qq_35624982]

public class LoginJsonServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
* @see HttpServlet#HttpServlet()
*/
public LoginJsonServlet() {
super();
// TODO Auto-generated constructor stub
}

/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
// response.setContentType("Text/html;charset=UTF-8");
String uname = request.getParameter("uname");
String upass = request.getParameter("upass");
// PrintWriter pw = response.getWriter();

Users condition = new Users();
condition.setUname(uname);
condition.setUpass(upass);

UserDao userDao = new UserDao();
Users user = userDao.login(condition); ？？？这个地方一直都是显示login无法调用？？？？


PrintWriter out = response.getWriter();
if (user != null) {//生成json字符串
ObjectMapper mapper = new ObjectMapper();
String json = mapper.writeValueAsString(user);
out.write(json);
out.flush();
out.close();
}

// 得到session对象
// 如果传false，当前session对象就返回session对象，如果不存在就返回新创建的对象
HttpSession session = request.getSession();

if (user != null) {
session.setAttribute("USER", user);
request.setAttribute("USERNAME", uname);
//请求转发
request.getRequestDispatcher("/success.jsp ").forward(request,response);
// 重定向
response.sendRedirect("success.html");
request.getRequestDispatcher("/BloggersSearvlet").forward(request,
response);
System.out.println("login");

response.sendRedirect("BloggersSearvlet");
// pw.println(uname + "登陆成功！");
} else {
// pw.println(uname + "登录失败");
request.getRequestDispatcher("/fail.jsp").forward(request,response);
request.getRequestDispatcher("/fail.jsp")
.forward(request, response);
}

}

/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
doGet(request, response);
}

}



DAO类
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.concurrent.locks.Condition;

import org.apache.tomcat.jni.User;

import entity.Users;

public class UserDao {
public Users login(User condition)

{
Connection connection = ConnectionManager.getConnection();
Statement stmt = null;
Users user = null;
String sql = "select userid,username,password from tbl_user where username='"
+ user.getUname()
+ "' and password ='"
+ user.getUpass()
+ "'";

ResultSet rs = null;
try {
stmt = connection.createStatement();
rs = stmt.executeQuery(sql);
while (rs.next()) {
user = new Users();
int userid = rs.getInt("USERID");
String uname = rs.getString("UNAME");
String upass = rs.getString("UPASS");
int age = rs.getInt("AGE");
user.setUserid(userid);
user.setUname(uname);
user.setUpass(upass);
user.setAge(age);

}
} catch (SQLException e) {
e.printStackTrace();
} finally {
ConnectionManager.closeResultSet(rs);
ConnectionManager.closeStatement(stmt);
ConnectionManager.closeConnection(connection);
}
return user;

}

}