Fastjson在对hibernate对象的级联属性的过滤

1、根据Fastjson官方提供的api进行重写，根据类型以及层级来过滤相关需要过滤的属性

2、代码如下：package com.example.util.fastjson; import java.util.Date;import java.util.HashMap;import java.util.Map; import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.serializer.JSONSerializer;import com.alibaba.fastjson.serializer.PropertyPreFilter;import com.alibaba.fastjson.serializer.SerializerFeature;import com.suncompass.example.auth.entity.AuthEmployee;import com.suncompass.example.auth.entity.AuthMenu;import com.suncompass.framework.base.entity.BaseEntity; /*** @author ：晨风²º¹³ <br>* @Comment ： fastjson 针对类型的属性选择过滤器(可以跨层级) <br>*/public class ComplexPropertyPreFilter implements PropertyPreFilter { private Map<Class<?>, String[]> includes = new HashMap<>(); private Map<Class<?>, String[]> excludes = new HashMap<>(); static { JSON.DEFAULT_GENERATE_FEATURE |= SerializerFeature.DisableCircularReferenceDetect.getMask(); } public ComplexPropertyPreFilter() { } public ComplexPropertyPreFilter(Map<Class<?>, String[]> includes) { super(); this.includes = includes; } public boolean apply(JSONSerializer serializer, Object source, String name) { //对象为空。直接放行 if (source == null) { return true; } // 获取当前需要序列化的对象的类对象 Class<?> clazz = source.getClass(); // 无需序列的对象、寻找需要过滤的对象，可以提高查找层级 // 找到不需要的序列化的类型 for (Map.Entry<Class<?>, String[]> item : this.excludes.entrySet()) { // isAssignableFrom()，用来判断类型间是否有继承关系 if (item.getKey().isAssignableFrom(clazz)) { String[] strs = item.getValue(); // 该类型下 此 name 值无需序列化 if (isHave(strs, name)) { return false; } } } // 需要序列的对象集合为空 表示 全部需要序列化 if (this.includes.isEmpty()) { return true; } // 需要序列的对象 // 找到不需要的序列化的类型 for (Map.Entry<Class<?>, String[]> item : this.includes.entrySet()) { // isAssignableFrom()，用来判断类型间是否有继承关系 if (item.getKey().isAssignableFrom(clazz)) { String[] strs = item.getValue(); // 该类型下 此 name 值无需序列化 if (isHave(strs, name)) { return true; } } } return false; } /* * 此方法有两个参数，第一个是要查找的字符串数组，第二个是要查找的字符或字符串 */ public static boolean isHave(String[] strs, String s) { for (int i = 0; i < strs.length; i++) { // 循环查找字符串数组中的每个字符串中是否包含所有查找的内容 if (strs[i].equals(s)) { // 查找到了就返回真，不在继续查询 return true; } } // 没找到返回false return false; } public Map<Class<?>, String[]> getIncludes() { return includes; } public void setIncludes(Map<Class<?>, String[]> includes) { this.includes = includes; } public Map<Class<?>, String[]> getExcludes() { return excludes; } public void setExcludes(Map<Class<?>, String[]> excludes) { this.excludes = excludes; } public static void main(String[] args) { // use instanceOf，用来判断对象是否是类的实例 // use isAssignableFrom()，用来判断类型间是否有继承关系 // use isInstance()，用来判断对象是否是类的实例 Class<?> intClass = Integer.class; // Create various objects. String str = "Hello"; Date date = new Date(); Integer i = new Integer(10); // Is str an instance of class Integer? boolean check1 = intClass.isInstance(str); System.out.println("str is an Integer? " + check1); // Is date an instance of class Integer? boolean check2 = intClass.isInstance(date); System.out.println("date is an Integer? " + check2); // Is i an instance of class Integer? boolean check3 = intClass.isInstance(i); System.out.println("i is an Integer? " + check3); System.out.println(BaseEntity.class.isInstance(new AuthEmployee())); System.out.println(AuthEmployee.class.isInstance(new AuthMenu())); System.out.println(BaseEntity.class.isAssignableFrom(AuthEmployee.class)); }}

3、按照代码中给出main方法中的测试代码给予相应调用！