request.getRequestDispatcher()跳转+中文乱码

public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Connection Conn=new db().getConn(); try { Statement stmt = Conn.createStatement(); String sql="Select * from student"; ResultSet rs = stmt.executeQuery(sql); List<Student> liststu = new ArrayList<Student>(); while(rs.next()){ Student student = new Student(); student.setName(rs.getString("name")); student.setSid(rs.getString("sid")); student.setSex(rs.getString("sex")); student.setProvince(rs.getString("province")); student.setQq(rs.getString("qq")); student.setTel(rs.getString("tel")); liststu.add(student); } request.setAttribute("list", liststu); rs.close(); stmt.close(); Conn.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } // response.setCharacterEncoding("UTF-8"); // 先指定输出流的编码 // response.setContentType("text/html;charset=UTF-8");  // PrintWriter out = response.getWriter(); request.getRequestDispatcher("index.jsp").forward(request, response);

}

doget方法中如果有PrintWriter out = response.getWriter();就需要在此之前设置编码方式

response.setCharacterEncoding("UTF-8");  response.setContentType("text/html;charset=UTF-8");

不能够在PrintWriter out = response.getWriter();后面设置编码方式，否则就会中文乱码，因为在out对象初始化之后再设置就编码方式就没有任何意义了

如果doget方法中没有PrintWriter out = response.getWriter();可以不设置编码方式，这样也不会出现中文乱码的问题。