src/org/bs/servlet/backend/UserServlet.java

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package org.bs.servlet.backend;

import java.io.IOException;
import java.io.PrintWriter;
import java.lang.reflect.InvocationTargetException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.beanutils.BeanUtils;

import org.bs.model.User;

import org.bs.service.UserService;
import org.bs.utils.JDBCHandler;
import org.bs.utils.PageContext;
import org.bs.utils.ResultUtils;

public class UserServlet extends BaseServlet {

	private UserService userService;

	public void approval(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/plain");
		response.setHeader("Cache-Control", "no-cache");
		String username = request.getParameter("username");
		User user = userService.findByUserName(username);
		PrintWriter out = response.getWriter();
		if (user != null)
			out.write("1");
		else
			out.write("0");
		out.flush();
		out.close();
	}

	public void view(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		int id = ((User) request.getSession().getAttribute("login_user"))
				.getId();
		User user = userService.findById(id);
		request.setAttribute("user", user);
		request.getRequestDispatcher("/backend/user/view_user.jsp").forward(
				request, response);
	}

	public void validate(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/plain");
		response.setHeader("Cache-Control", "no-cache");
		String username = request.getParameter("username");
		User user = userService.findByUserName(username);
		PrintWriter out = response.getWriter();
		if (user != null)
			out.write("1");
		else
			out.write("0");
		out.flush();