response：往浏览器显示中文

response.setHeader("content-type", "text/html;charset=UTF-8");
String data="中国";
OutputStream out =response.getOutputStream();
out.write(data. getBytes("UTF-8"));

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String data="你好";

//设置response使用的码表，以控制response以什么码表向浏览器写出数据
response.setCharacterEncoding("UTF-8");
//指定浏览器以什么码表打开
response.setHeader("content-type", "text/html;charset=UTF-8");
PrintWriter pw=response.getWriter();
pw.write(data);

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//或者直接使用一条语句

response.setContentType("text/html;charset=UTF-8");