html表单提交servlet路径问题

最新推荐文章于 2021-07-01 00:10:05 发布

原创最新推荐文章于 2021-07-01 00:10:05 发布 · 1.9k 阅读

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这篇博客探讨了HTML表单提交时，`action`属性中使用`.`（当前目录）来指定Servlet路径的问题。示例代码展示了一个登录表单，当用户提交表单时，请求将被发送到`LoginServlet`。Servlet通过`@WebServlet("/LoginServlet")`注解定义了URL映射。在`doGet`和`doPost`方法中，根据用户名和密码验证结果，Servlet会重定向用户到不同的页面。文章主要关注如何正确配置表单和Servlet之间的交互路径。

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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="./LoginServlet" method="post">
用户名：<input type="text" name="username"/></br>
密码：<input type="password" name="password"/></br>
<input type="submit" value="登陆"/>
</form>
</body>
</html>

import java.io.IOException;
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 LoginServlet
 */
@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

    /**
     * Default constructor. 
     */
    public LoginServlet() {
        // 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
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		if (username.equals("hwj") && password.equals("123")) {
			// 重定向到登陆成功界面
   		    response.sendRedirect("/hwj2/welcome.html");
			
		} else {
			response.sendRedirect("/hwj2/fail.html");
		}
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

不懂action的路径为什么要写个.??????