（3）-JSONObject的过滤设置

我们通常对一个json串和java对象进行互转时，经常会有选择性的过滤掉一些属性值。例如下面的类：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

public class Person {     private String name;     private String address;     private String sex;     public String getAddress()     {         return address;     }     public void setAddress(String address)     {         this.address = address;     }     public String getName()     {         return name;     }     public void setName(String name)     {         this.name = name;     }     public String getSex()     {         return sex;     }     public void setSex(String sex)     {         this.sex = sex;     } }

如果我想过滤address属性怎么办？

方法一：实现JSONString接口

 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

import net.sf.json.JSONString; public class Person implements JSONString {     private String name;     private String sex;     private String address;     public String toJSONString()     {         return "{\"name\":\"" + name + "\",\"sex\":\"" + sex + "\"}";     }     public String getAddress()     {         return address;     }     public void setAddress(String address)     {         this.address = address;     }     public String getName()     {         return name;     }     public void setName(String name)     {         this.name = name;     }     public String getSex()     {         return sex;     }     public void setSex(String sex)     {         this.sex = sex;     } } import net.sf.json.JSONObject; public class Test { public static void main(String args[]) {        Person person = new Person();         person.setName("swiftlet");         person.setSex("men");         person.setAddress("china");         JSONObject json = JSONObject.fromObject(person);         System.out.println(json.toString());     } }

 

方法二：设置jsonconfig实例，对包含和需要排除的属性进行添加或删除。

 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

import net.sf.json.JSONObject; import net.sf.json.JsonConfig; public class Test {     public static void main(String args[])     {         Person person = new Person();         person.setName("swiftlet");         person.setSex("men");         person.setAddress("china");         JsonConfig jsonConfig = new JsonConfig();         jsonConfig.setExcludes(new String[]         { "address" });         JSONObject json = JSONObject.fromObject(person, jsonConfig);         System.out.println(json.toString());     } }

 

方法三：使用propertyFilter实例过滤属性。

 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

import net.sf.json.JSONObject; import net.sf.json.JsonConfig; import net.sf.json.util.PropertyFilter; public class Test {     public static void main(String args[])     {         Person person = new Person();         person.setName("swiftlet");         person.setSex("men");         person.setAddress("china");         JsonConfig jsonConfig = new JsonConfig();         jsonConfig.setJsonPropertyFilter(new PropertyFilter() {             public boolean apply(Object source, String name, Object value)             {                 return source instanceof Person && name.equals("address");             }         });         JSONObject json = JSONObject.fromObject(person, jsonConfig);         System.out.println(json.toString());     } }

总结

以上是生活随笔为你收集整理的（3）-JSONObject的过滤设置的全部内容，希望文章能够帮你解决所遇到的问题。

如果觉得生活随笔网站内容还不错，欢迎将生活随笔推荐给好友。