Java Web学习——问题罗列_java网站故障罗列-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_22187919/article/details/52316029

Java Web学习——问题罗列

个人遇到的问题，仅供参考

前台POST中文数据到Servlet出现乱码

html代码：hello.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>
<form action="HelloForm" method="POST">
名字：<input type="text" name="first_name">
<br />
姓氏：<input type="text" name="last_name" />
<input type="submit" value="提交" />
</form>
</body>
</html>

servlet代码：HelloForm.java

import java.io.IOException;
import java.io.PrintWriter;

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

/**
 * Servlet implementation class HelloForm
 */
@WebServlet("/HelloForm")
public class HelloForm extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public HelloForm() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        //request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String title = "GET方法读取表单数据";
        String docType = "<!doctype html public \"-//w3c//dtd html 4.0 "+
                         "transitional//en\">\n";
        out.println(docType +
                "<html>\n" +
                "<head><title>" + title + "</title></head>\n" +
                "<body bgcolor=\"#f0f0f0\">\n" +
                "<h1 align=\"center\">" + title + "</h1>\n" +
                "<ul>\n" +
                "  <li><b>名字</b>："
                + request.getParameter("first_name") + "\n" +
                "  <li><b>姓氏</b>："
                + request.getParameter("last_name") + "\n" +
                "</ul>\n" +
                "</body></html>");
    }
    public void doPost(HttpServletRequest request, 
        HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}