fasterxml jackson的使用--从pojo转成json字符串和json解析回pojo

1.从BookVo转成json

	BookVo bookVo=new BookVo("sb", 1, "bigsb", "xx.jpg", "this is a sb", 48, new Date());
		//创建对象映射器
		ObjectMapper om=new ObjectMapper();
		//读取BookVo对象并返回字符串
		String book=om.writeValueAsString(bookVo);
		System.out.println(book);

2.从json转回BookVo

ObjectMapper om=new ObjectMapper();
		//使用readValue解析json，注意要指定json要转回的类型
		BookVo bookVo =om.readValue("{\"name\":\"sb\",\"tid\":1,\"author\":\"bigsb\",\"photo\":\"xx.jpg\",\"bookinfo\":\"this is a sb\",\"price\":48.0,\"publicactiondate\":\"2018-01-18\"}\r\n" + 
				"", BookVo.class);
		System.out.println(bookVo.toString());

注：

1.pojo（Plain Old Java Object）普通java对象

2.fasterxml jackson是json第二版，即json2.0

3.fasterxml jackson使用说明https://github.com/FasterXML/jackson-databind/

4.jsonj介绍http://www.json.org/json-zh.html