servlet返回数据
时间: 2023-09-14 17:15:47 浏览: 96
在一个Java Servlet中,可以使用HttpServletResponse对象来返回数据给客户端。以下是一个简单的例子:
```java
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// 设置响应内容类型
response.setContentType("text/html");
// 实际的逻辑是在这里
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>Hello World</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Hello World!</h1>");
out.println("</body>");
out.println("</html>");
}
```
在这个例子中,我们使用response.getWriter()方法获取一个PrintWriter对象,然后通过这个对象向客户端输出HTML文本。要注意的是,在调用getWriter()方法之前,必须先调用setContentType()方法设置响应内容类型,否则会导致客户端无法正确解析返回的数据。
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