要想将字符数据写回到浏览器,我们需要两个步骤:
- 通过Response对象获取字符输出流: PrintWriter writer = resp.getWriter();
- 通过字符输出流写数据: writer.write(“aaa”);
1. 返回一个简单的字符串aaa
/**
* 响应字符数据:设置字符数据的响应体
*/
@WebServlet("/resp3")
public class ResponseDemo3 extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
//1. 获取字符输出流
PrintWriter writer = response.getWriter();
writer.write("aaa");
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doGet(request, response);
}
}
2.返回一串html字符串,并且能被浏览器解析
PrintWriter writer = response.getWriter();
//content-type,告诉浏览器返回的数据类型是HTML类型数据,这样浏览器才会解析HTML标签
response.setHeader(“content-type”,”text/html”);
writer.write(“
aaa
“);==注意:==一次请求响应结束后,response对象就会被销毁掉,所以不要手动关闭流。
3. 返回一个中文的字符串你好,需要注意设置响应数据的编码为utf-8
//设置响应的数据格式及数据的编码
response.setContentType(“text/html;charset=utf-8”);
writer.write(“你好”);