2021-07-09

记录一次Servlet获取不到jsp的错误
在编写servlet获取jsp页面时，浏览器一直报：纯文本文件的字符编码未声明。如果该文件包含 US-ASCII 范围之外的字符，该文件将在某些浏览器配置中呈现为乱码。该文件的字符编码需要在传输协议层声明，或者在文件中加入一个 BOM（字节顺序标记）。
研究了两天才发现是`package web.servlet;

import Services.Services;
import Services.implServices.implServices;
import domain.Users;

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 java.io.IOException;
import java.util.List;

@WebServlet("/usersServlet")
public class usersServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Services services=new implServices();
List us = services.findAll();
request.setAttribute(“users”,us);
request.getRequestDispatcher("/list.jsp").forward(request,response);

}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request,response);
}

}`doGet方法中少写了 this.doPost(request,response);