Servlet返回JSON格式数据

response.setCharacterEncoding("UTF-8");
response.setContentType("application/json; charset=utf-8");
String jsonStr = "{\"name\":\"fly\",\"type\":\"虫子\"}";
PrintWriter out = null;
try {
out = response.getWriter();
out.write(jsonStr);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (out != null) {
out.close();
}
}