简介

SerializeFilter是通过编程扩展的方式定制序列化。fastjson支持6种SerializeFilter，用于不同场景的定制序列化。@H_404_4@

PropertyPreFilter 根据PropertyName判断是否序列化
PropertyFilter 根据PropertyName和PropertyValue来判断是否序列化
NameFilter 修改Key，如果需要修改Key,process返回值则可
ValueFilter 修改Value
BeforeFilter 序列化时在最前添加内容
AfterFilter 序列化时在最后添加内容@H_404_4@

修改属性值

以下示例将name为“Jack”改为“Foo”.@H_404_4@

public class TestFastJson（）{
   @Test
    @Ignore
    public void testJSON(){
        Person person = new Person(22,"Jack");

        ValueFilter valueFilter = new ValueFilter() {
            @Override
            public Object process(Object o,String propertyName,Object propertyValue) {
                if(propertyName.equals("name")){
                   return new String("Foo");    //返回修改后的属性值对象
                }

                return propertyValue;
            }
        };

        String jsonString = JSON.toJSONString(person,valueFilter);
        System.out.println("jsonString is: " + jsonString);

    }

    private static class Person{
        int age;
        String name;
        private Person(int age,String name){
            this.age = age;
            this.name = name;
        }
        public int getAge() {
            return age;
        }

        public void setAge(int age) {
            this.age = age;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }
    }