JAVA生成json格式的数据， 这里使用import org.json.JSONObject;

先加载所需要的jar包

json.zip

response.setContentType("text/html;charset=UTF-8");
	    PrintWriter out = response.getWriter();
		JSONObject jsonObject =  new JSONObject();
		jsonObject.put("names","庄子");
		jsonObject.put("sex", "男");
		String[] hobby = {"游泳","打篮球"};
		jsonObject.put("hobbies", Arrays.asList(hobby)); //添加数组
		HashMap<String,Integer> map = new HashMap<String,Integer>();
		map.put("eng",100);
		map.put("math",99);
		map.put("chinese",98);
		jsonObject.put("score", map);
		System.out.println(jsonObject);//添加HashMap对象
		out.println(jsonObject);

显示结果如下：

{"score":{"chinese":98,"math":99,"eng":100},"names":"庄子","hobbies":["游泳","打篮球"],"sex":"男"}

解析结果如下：

AJAX请求结果如下：

方法二：加载阿里的fastjson2包

fastjson2-2.0.12.graal.zip

HashMap<String, Object> hm = new HashMap<>();
        hm.put("name","小强");
        hm.put("sex","男");
        String[] h = {"牛奶","香蕉"};
        hm.put("h",h);
String json = JSON.toJSONString(hm);
        response.getWriter().println(json);