Java 基于HTML页面操作重定向到其他servlet_Java_Html_Servlet 3.0

Java 基于HTML页面操作重定向到其他servlet

java html

Java 基于HTML页面操作重定向到其他servlet,java,html,servlet-3.0,Java,Html,Servlet 3.0,这里我有两个小服务员 @WebServlet("/Login") public class Login extends HttpServlet { ......... ......... } @WebServlet("/Create") public class Create extends HttpServlet { ......... ......... } 还有像这样的HTML页面 <form name="loginForm" method="post" action=

这里我有两个小服务员

@WebServlet("/Login")
public class Login extends HttpServlet {

.........
.........

}


@WebServlet("/Create")
public class Create extends HttpServlet {

.........
.........

}

还有像这样的HTML页面

<form name="loginForm" method="post" action="Login">
  <table width="20%" bgcolor="0099CC" align="center">
    <tr>
      <td colspan=2>
        <center>
          <font size=4><b>HTML Login Page</b></font>
        </center>
      </td>
    </tr>
    <tr>
      <td>Username:</td>
      <td><input type="text" size=25 name="username"></td>
    </tr>
    <tr>
      <td>Password:</td>
      <td><input type="Password" size=25 name="password"></td>
    </tr>
    <tr>
      <td><input type="submit" onclick="return check(this.form)" value="Login"></td>
    </tr>
    <tr>
      <td><input type="submit" onclick="return check(this.form)" value="Create profile"></td>
    </tr>

  </table>
</form>


HTML登录页
用户名：
密码：

我想在用户单击createprofile时重定向到createservlet。有人能帮我吗？

您有一个表单，希望它转到两个不同的servlet。你不能那样做。如果您想先登录servlet，然后再创建servlet。您可以通过查看requestDispatcher或httpServletresponse.sendRedirect（）来执行此操作

或者

response.sendRedirect("/url");

或者，如果您根本不想进入登录servlet，直接想进入创建，那么使用两个表单，一个用于登录，另一个用于创建配置文件。

或者

response.sendRedirect("/url");

或者，如果您根本不想进入登录servlet，直接想进入创建，那么使用两个表单，一个用于登录，另一个用于创建配置文件。

您需要根据单击的按钮选择操作。您可以使用JavaScript来完成。下面给出了一个最小的工作示例，您可以根据需要进行扩展：

HTML

<!DOCTYPE html>
<html>
    <head>
    <meta charset="UTF-8">
    <script>
        function check(form, button){
            if(button.id=='login'){
                form.action="Login";
            }else if(button.id=='create'){
                form.action="Create";
            }
            form.submit();
        }
    </script>
    <title>Insert title here</title>
    </head>
    <body>
        <form name="loginForm" method="post">
            <table width="20%" bgcolor="0099CC" align="center">
                <tr>
                    <td colspan=2>
                        <center>
                            <font size=4><b>HTML Login Page</b></font>
                        </center>
                    </td>
                </tr>
                <tr>
                    <td>Username:</td>
                    <td><input type="text" size=25 name="username"></td>
                </tr>
                <tr>
                    <td>Password:</td>
                    <td><input type="Password" size=25 name="password"></td>
                </tr>
                <tr>
                    <td><input type="button" id="login" onclick="check(this.form,this)"
                        value="Login"></td>
                </tr>
                <tr>
                    <td><input type="button" id="create" onclick="check(this.form,this)"
                        value="Create profile"></td>
                </tr>

            </table>
        </form>
    </body>
</html>

Create.java

package servlets;

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;

@WebServlet("/Login")
public class Login extends HttpServlet {
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        out.println("Login");
    }
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }
}

package servlets;

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;

@WebServlet("/Create")
public class Create extends HttpServlet{
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        out.println("Create");
    }
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }
}

您需要根据单击的按钮选择操作。您可以使用JavaScript来完成。下面给出了一个最小的工作示例，您可以根据需要进行扩展：

HTML

<!DOCTYPE html>
<html>
    <head>
    <meta charset="UTF-8">
    <script>
        function check(form, button){
            if(button.id=='login'){
                form.action="Login";
            }else if(button.id=='create'){
                form.action="Create";
            }
            form.submit();
        }
    </script>
    <title>Insert title here</title>
    </head>
    <body>
        <form name="loginForm" method="post">
            <table width="20%" bgcolor="0099CC" align="center">
                <tr>
                    <td colspan=2>
                        <center>
                            <font size=4><b>HTML Login Page</b></font>
                        </center>
                    </td>
                </tr>
                <tr>
                    <td>Username:</td>
                    <td><input type="text" size=25 name="username"></td>
                </tr>
                <tr>
                    <td>Password:</td>
                    <td><input type="Password" size=25 name="password"></td>
                </tr>
                <tr>
                    <td><input type="button" id="login" onclick="check(this.form,this)"
                        value="Login"></td>
                </tr>
                <tr>
                    <td><input type="button" id="create" onclick="check(this.form,this)"
                        value="Create profile"></td>
                </tr>

            </table>
        </form>
    </body>
</html>

Create.java

package servlets;

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;

@WebServlet("/Login")
public class Login extends HttpServlet {
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        out.println("Login");
    }
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }
}

package servlets;

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;

@WebServlet("/Create")
public class Create extends HttpServlet{
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        out.println("Create");
    }
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }
}

您真的需要第二个servlet吗？如果按下了

createprofile

按钮，为什么不在java代码中进行测试？您真的需要第二个servlet吗？如果按下了

createprofile

按钮，为什么不在java代码中进行测试？