在Java中，response.write()方法用于将数据写入HTTP响应的输出流。以下是使用response.write()的示例：
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class MyServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html"); // 设置响应的内容类型为HTML
response.setCharacterEncoding("UTF-8"); // 设置响应的字符编码为UTF-8
String message = "Hello, World!";
response.getWriter().write(message); // 将消息写入响应的输出流
}
}
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>My JSP Page</title>
</head>
<body>
<%
String message = "Hello, World!";
response.getWriter().write(message); // 将消息写入响应的输出流
%>
</body>
</html>
无论是使用Servlet API还是JSP页面，都需要获取响应对象response，并调用response.getWriter()方法来获取输出流，然后使用write()方法将数据写入输出流。在上述示例中，将字符串"Hello, World!"写入了响应的输出流中。
