FastJson使用学习

FastJson使用学习

1、json转object、object转json

List<CompanyLoopPicture> list = new ArrayList<CompanyLoopPicture>();
CompanyLoopPicture clp = new CompanyLoopPicture();
clp.setId(1);
clp.setCompanyId(100);
clp.setTitle("google");
clp.setPicture("/upload/images/1.jpg");
clp.setLink("http://www.google.com");
clp.setFlag("modify");
list.add(clp);
clp = new CompanyLoopPicture();
clp.setId(2);
clp.setCompanyId(200);
clp.setTitle("intel");
clp.setPicture("/upload/images/2.jpg");
clp.setLink("http://www.intel.com");
clp.setFlag("delete");
list.add(clp);
String json = JSON.toJSONString(list);//object转json
System.out.println(json);
List<CompanyLoopPicture> newList = JSON.parseArray(json, CompanyLoopPicture.class);//json转object
System.out.println(newList);

2、忽略字段

 方式一、@JSONField(serialize=false)

@JSONField(serialize=false) 
private int displayOrder;

方式二、transient

private transient int displayOrder;

方式三、PropertyFilter，返回false是去掉的字段

PropertyFilter profilter = new PropertyFilter(){  
    @Override  
    public boolean apply(Object object, String name, Object value) {
        if(name.equalsIgnoreCase("displayOrder")) {
            return false;
        }  
        return true;
    }
};
String json = JSON.toJSONString(list, profilter);

方式四、SimplePropertyPreFilter，指定要序列化的字段

SimplePropertyPreFilter filter = new SimplePropertyPreFilter(CompanyLoopPicture.class, "id","companyId","link","picture","title");
        String json = JSON.toJSONString(list, filter);