json-lib-2.4-jdk15:这个第三方jar包(版本随便,这里版本是2.4)
此外还需要额外json-lib所依赖的包json-lib-2.4-jdk15.jar所需全部JAR包.rar
2.设置头部
req.setCharacterEncoding("utf-8"); resp.setCharacterEncoding("utf-8"); resp.setHeader("content-type", "application/json;charset=utf-8"); PrintWriter pw = resp.getWriter(); JSONObject jo = new JSONObject(); jo.put("status", 200); jo.put("msg", "访问成功"); pw.write(jo.toString());