web项目 中文乱码

package com.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Date;
import java.util.Arrays;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.entity.Admin;
import com.entity.Student;
import com.service.AdminService;
import com.service.impl.AdminServiceImpl;
@WebServlet("/servlet/AdminServlet")
public class AdminServlet extends HttpServlet {
	@Override
	protected void service(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		req.setCharacterEncoding("utf-8");
		String method = req.getParameter("method");
		if ("adminRegister".equals(method)) {
			adminRegister(req,resp);
		} else if("studentRegister".equals(method)){
			studentRegister(req, resp);
		}else if("studentShowAll".equals(method)){
			studentShowAll(req,resp);
		}else if("studentRemove".equals(method)){
			studentRemove(req, resp);
		}else if ("studentFindOne".equals(method)) {
			studentFindOne(req, resp);
		}else if("studentChange".equals(method)){
			studentChange(req, resp);
		}
	}
	
	//确认修改然后跳转
	protected void studentChange(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		
		
		
		int stuno=Integer.parseInt(req.getParameter("sno"));
		String stupwd=req.getParameter("pwd");
		String stuname = req.getParameter("name");
		String phone = req.getParameter("phone");
		String gender = req.getParameter("gender");
		Date birth = Date.valueOf(req.getParameter("birth"));
		int clazzno = Integer.parseInt(req.getParameter("clazz"));
		String remark = req.getParameter("remark");		
		
			
		Student stu = new Student(stuno, stupwd, stuname, phone, gender, birth, clazzno, remark);
		
		AdminService admins = new AdminServiceImpl();
		
		int update = admins.change(stu);
		
		if (update>0) {
			resp.sendRedirect("/sscs/servlet/AdminServlet?method=studentShowAll");
		}
	}
	
	//修改的方法
	protected void studentFindOne(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		int sno = Integer.parseInt(req.getParameter("sno"));
		
		AdminService admins = new AdminServiceImpl();
		
		Student stu = admins.findOne(sno);
		
		if (stu!=null) {
			req.setAttribute("stu", stu);
			req.getRequestDispatcher("/files/studentUpdate.jsp").forward(req, resp);
		}
		
	}
	
	//查询全部学生的方法
	protected void studentShowAll(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		AdminService admins = new AdminServiceImpl();
		
		List<Student> list = admins.findAll();
		
		if (list.size()>0) {
			req.setAttribute("list", list);
			req.getRequestDispatcher("/files/studentList.jsp").forward(req, resp);
		}
		
	}
	
	//删除单个学生
	protected void studentRemove(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		int sno = Integer.parseInt(req.getParameter("sno"));
		
		AdminService admins = new AdminServiceImpl();
		
		int update = admins.remove(sno);
		
		if (update>0) {
			
			resp.sendRedirect("/sscs/servlet/AdminServlet?method=studentShowAll");
		}
		
	}
	
	//添加学生的方法
	protected void studentRegister(HttpServletRequest  req, HttpServletResponse resp)
			throws ServletException, IOException {

		String stupwd=req.getParameter("pwd");
		String stuname = req.getParameter("name");
		String phone = req.getParameter("phone");
		String gender = req.getParameter("gender");
		Date birth = Date.valueOf(req.getParameter("birth"));
		int clazzno = Integer.parseInt(req.getParameter("clazz"));
		String remark = req.getParameter("remark");
		Student stu = new Student(0, stupwd, stuname, phone, gender, birth, clazzno, remark);
		
		AdminService admins = new AdminServiceImpl();
		
		int update = admins.registerstu(stu);
		if (update>0) {
			resp.sendRedirect(req.getContextPath()+"/servlet/AdminServlet?method=studentShowAll");
		}else{
			req.setAttribute("msg", "注册失败");
			req.getRequestDispatcher("/files/studentRegister.jsp").forward(req, resp);
		}
	}
	//添加管理员的方法
	protected void adminRegister(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {

		//接收数据
		String userid = req.getParameter("uid");
		String username = req.getParameter("uname");
		String password = req.getParameter("pwd");
		int age = Integer.parseInt(req.getParameter("age"));
		float score = Float.parseFloat(req.getParameter("score"));
		Date enterDate = Date.valueOf(req.getParameter("enterdate"));
		String hobby =Arrays.toString( req.getParameterValues("hobby"));
		
		Admin admin = new Admin(userid, username, password, age, score, enterDate, hobby);
		//执行service层方法
		AdminService admins = new AdminServiceImpl();
		int update = admins.register(admin);
		//判断跳转
		if (update>0) {
			//resp.sendRedirect("/sscs/index.html");
			
			PrintWriter out = resp.getWriter();
			out.print("<script type='text/javascript'>");
			out.print("window.top.location.href='/sscs/index.html';");
			out.print("</script>");
			out.close();
		}else{
			req.setAttribute("msg", "注册失败");
			req.getRequestDispatcher("/files/adminRegister.jsp").forward(req, resp);
		}
		
	}
}