如何获取请求参数
表单如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="http://localhost:8080/servlet/parameterServlet" method="get">
用户名:<input type="text" name="username"><br>
密码：<input type="password" name="password"><br>
兴趣爱好：<input type="checkbox" name="hobby" value="cpp">cpp
<input type="checkbox" name="hobby" value="java">java
<input type="checkbox" name="hobby" value="js">javascript<br>
<input type="submit">
</form>
</body>
</html>
servlet程序如下：
package LWB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;
public class ParameterServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String username=req.getParameter("username");
String password=req.getParameter("password");
String[] hobby=req.getParameterValues("hobby");
System.out.println("用户名："+username);
System.out.println("密码："+password);
System.out.println("兴趣爱好："+ Arrays.asList(hobby));
}
}