java对象json转换-FastJson使用

导入依赖

        <dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.62</version>
	</dependency>

json转对象

        String aaa = "";
        Product product = JSONObject.parseObject(aaa, Product.class);

json转jsonObject

        String aaa = "{\"ids\":\"4\"}";
        JSONObject jsonObject = JSONObject.parseObject(aaa);
        //取出值
	jsonObject.getString("ids"); //4

java对象转json字符串

        Product product=new Product();
        String s = JSONObject.toJSONString(product);