Jackson 教程演示样例
查看原文教程:http://www.ibloger.net/article/275.html
Json经常使用的类库例如以下
Jackson:http://jackson.codehaus.org/
JSON-lib:http://json-lib.sourceforge.net/
Gson:http://code.google.com/p/google-gson/
Jackson能够轻松的将Java对象转换成json对象和xml文档。相同也能够将json、xml转换成Java对象。
不仅限于对java对象。对于Map、List、Array相同有效。
JsonLib的教程參考之前写过的文章http://blog.csdn.net/xiaokui_wingfly/article/details/39890969
或其它朋友的文章:http://www.cnblogs.com/hoojo/archive/2011/04/21/2023805.html
XStream : http://blog.csdn.net/xiaokui_wingfly/article/details/46470145
一、准备工作
1、 下载依赖库jar包
Jackson的jar官方下载地址:http://wiki.fasterxml.com/JacksonDownload
然后在project中导入这个jar包就可以開始工作
官方演示样例:http://wiki.fasterxml.com/JacksonInFiveMinutes
假设你须要转换xml,那么还须要stax2-api.jar
注:下面我的全部演示样例中省略getter和setter方法,请自行加入
演示样例1:一个简单的Json和JavaBean之间的转换
/**
* JavaBean/Map/List/Array互相转换JSON
*/
public static void main(String[] args) {
ObjectMapper objectMapper = new ObjectMapper();
User user = new User();
user.setAddress("中国河南省");
user.setEmail("xiaokui_wingfly@sina.com.cn");
user.setId(1);
user.setName("X-rapido");
user.setBirthday(new Birthday("2015-08-06"));
List<String> list = new ArrayList<String>();
list.add("a");
list.add("b");
list.add("c");
Map<String, Object> map = new HashMap<String, Object>();
map.put("a", "1");
map.put("b", "2");
map.put("c", "3");
map.put("list", list);
String []sz = {"a","b","c"};
try {
System.out.println(objectMapper.writeValueAsString(user));
System.out.println(objectMapper.writeValueAsString(list));
System.out.println(objectMapper.writeValueAsString(map));
System.out.println(objectMapper.writeValueAsString(sz));
String s = "{\"name\":\"X-rapido\"}";
// Json转换JavaBean
User a = objectMapper.readValue(s, User.class);
System.out.println(a.getName());
// JavaBean转换Json
System.out.println(objectMapper.writeValueAsString(a));
} catch (IOException e) {
e.printStackTrace();
}
}
输出打印:
{"id":1,"name":"X-rapido","email":"xiaokui_wingfly@sina.com.cn","address":"中国河南省","birthday":{"birthday":"2015-08-06"}}
["a","b","c"]
{"b":"2","c":"3","a":"1","list":["a","b","c"]}
["a","b","c"]
X-rapido
{"id":0,"name":"X-rapido","email":null,"address":null,"birthday":null}
对于怎样与xml进行交互和JsonGenerator类的使用方法还有各个write、writeObject方法參考网友文章http://www.cnblogs.com/hoojo/archive/2011/04/22/2024628.html 不再罗嗦了。
posted on 2017-08-18 10:18 cynchanpin 阅读(922) 评论(0) 编辑 收藏 举报