JackSon将java对象转换为JSON字符串

JackSon可以将java对象转换为JSON字符串，步骤如下：
1.导入JackSon 的jar包
2.创建ObjectMapper对象
3.使用ObjectMapper对象的writeValueAsString()方法将java对象转换为JSON对象
这里有个例子：
public class Fruit {
private String name;
private String id;
public Customet(String name, String id) {
super();
= name;
= id;
}
public String getName() {
return name;
}
public void setName(String name) {
= name;
}
//@JsonIgnore
public String getId() {
return id;
}
public void setId(String id) {
= id;
}
public String getDate(){
return “2017-04-09”;
}
public static void main(String[] args) throws JsonProcessingException {
ObjectMapper mapper = new ObjectMapper();
Fruit fruit= new Fruit(“HaMiGua”, “1001”);
String mapJakcson = (fruit);
(mapJakcson);
}
}
通过输出到控制台显示如下JSON字符串