response.getWriter().print("中文")乱码解决

解决方法是在response.getWriter()前加上response..setContentType("text/html; charset=UTF-8");

下面是示例代码，注意代码中的红色字体：

protected void doGet(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

req.setCharacterEncoding("utf-8");

User user=(User)req.getSession().getAttribute("user");

if(null==user){

req.getRequestDispatcher("session/userLogin.jsp").forward(req, resp);

//避免恶意用户直接在地址栏访问localhost:8080/test/UpdateServlet

return;

}

//!resp.setCharacterEncoding("utf-8");单纯的这么设置一样有乱码

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

PrintWriter out=resp.getWriter();

if("admin".equals(user.getAuthority())){

out.print("成功");

}else{

out.print("无权限");

}

}