STRUTS2 Fastjson,jackson conversion json simple to use

One. Fastjson use

1. Import Fastjson.jar Package

2. How to use

Use the same method for objects and collections

Returns a JSON object using Json.tojsonstring (object)

3. If you format the output for the date type

@JSONField (format= "YYYY-MM-DD")

Private Date birthday;

4. About whether the property is generated in the JSON string set

In action, new a Serializefilter

 serializefilter filter = new PropertyFilter () {
 @Override 
 Public Boolean apply (Object object, String Nam        E, Object value) {
 System.out.println (object);//object to be converted to JSON 
 System.out.println (name);//property names 
         System.out.println (value);///property value 
 if ("id". Equals (name)) {
 Return false;//returns false to indicate that the JSON string is not generated in the 
 The 
 return true;//represents the build in the JSON string 
} 
}; 
 Json.tojsonstring (object, filter); 
 
  Two. Use of Jackson 
 1. Import Jackson's Jackson.jar package 
 2. Using method 
 Use the same method for objects and collections 
 Objectmapper Mapp ER = new Objectmapper (); 
 Sring JSON = mapper.writevalueasstring (object); 
 3. Processing Date type 
  

Objectmapper mapper = new Objectmapper ();
Mapper.setdateformat (New SimpleDateFormat ("Yyyy-mm-dd");//Set Date Formatter
Sring JSON = mapper.writevalueasstring (object);
4. Filtering Properties
1. All attribute filters under the entity class
Add annotations to an entity class
@JsonIgnoreProperties ({"id", "releasedate"})//filter properties are separated by commas
public class product{
private int id;
private Sting name;
Private Date ReleaseDate;
}
2. Attribute filtering for a single action

@JsonFilter ("Productfilter")//Use annotations to define the filtered entity class name
public class product{
private int id;
private Sting name;
Private Date ReleaseDate;
}
Implementation of encoding in action

Filterprovider fp = new Simplefilterprovider (). addfilter ("Productfilter",
Simplebeanpropertyfilter.filteroutallexcept ("id", "name");//contains only ID and name

Filterprovider fp = new Simplefilterprovider (). addfilter ("Productfilter",
Simplebeanpropertyfilter.serializeallexcept ("id", "name");//does not contain ID and name

Mapper.setfilters (FP);
　　　　
String JSON = mapper.writevalueasstring (object);
　　　　

STRUTS2 Fastjson,jackson conversion json simple to use