java object diff_Fast-object-diff 对象对比工具
Fast-object-diff
我们经常要打一些日志记录,然而手动记录是比价困难的,
也是不方便的,非常需要一个对比java相同对象内不同值的方法
Fast-object-diff就这样诞生.
支持基本对象 和 Collection集合
日期可按照自定义格式输出
注解方法输出日志,配置简单
忽略不需要的值
提供基础方法 generateDiff 和扩展方法
集合中可根据某个key进行对应diff记录,方便乱序中使用diff对比某个Object
使用方法很简单:
public class BeanA {
//使用注解标记列
@DiffLog(name = "测试a")
private String a;
//忽略这个
@DiffLog(name = "测试b", ignore = true)
private String b;
//集合递归支持
@DiffLog(name = "BList集合")
private List bList;
//日期格式转换
@DiffLog(name = "开始时间",dateFormat = "yyyy-dd-MM hh:mm:ss")
private Date start;
@DiffLog(name = "价格")
private BigDecimal price;
}
public class BeanB {
@DiffLogKey(name = "订单编号")//标记集合中对应的key,根据这个key来比对输出
@DiffLog(name = "主键")
private Long id ;
@DiffLog(name = "机场")
private String name;
}
BeanB a1b = new BeanB(1L,"北京");
BeanB a1b3 = new BeanB(3L,"3");
BeanB a1b2 = new BeanB(2L,"1");
ArrayList list = new ArrayList<>();
list.add(a1b);
list.add(a1b3);
list.add(a1b2);
BeanA a1 = new BeanA("1","1",list);
a1.setStart(new Date());
// a1.setPrice(new BigDecimal("10.23"));
BeanB a2b = new BeanB(1L,"上海");
BeanB a2b2 = new BeanB(2L,"2");
ArrayList list2 = new ArrayList<>();
list2.add(a2b);
list2.add(a2b2);
final BeanA a2 = new BeanA("2","2",list2);
a2.setPrice(new BigDecimal("50.852236"));
List diffWappers = AbstractObjectDiff.generateDiff(a1, a2);
结果Json格式:
[
{
"diffValue":{
"newValue":"2",
"oldValue":"1"
},
"logName":"测试a",
"op":"CHANGE",
"path":"/a"
},
{
"diffValue":{
"newValue":"上海",
"oldValue":"北京"
},
"logName":"BList集合.订单编号[1].机场",
"op":"CHANGE",
"path":"/bList/1/name"
},
{
"diffValue":{
"newValue":"2",
"oldValue":"1"
},
"logName":"BList集合.订单编号[2].机场",
"op":"CHANGE",
"path":"/bList/2/name"
},
{
"diffValue":{
"newValue":null,
"oldValue":"[主键]=3 ,[机场]=3 "
},
"logName":"BList集合.订单编号[3]",
"op":"REMOVE",
"path":"/bList/3"
},
{
"diffValue":{
"newValue":null,
"oldValue":"2019-09-09 02:16:30"
},
"logName":"开始时间",
"op":"REMOVE",
"path":"/start"
},
{
"diffValue":{
"newValue":50.852236,
"oldValue":null
},
"logName":"价格",
"op":"ADD",
"path":"/price"
}
]
也可以直接输出中文日志格式:
String s = ChineseObjectDiff.genChineseDiffStr(a1, a2);
结果直接输出:
「测试a」由[1]修改为[2]
「BList集合.订单编号[1].机场」由[北京]修改为[上海]
「BList集合.订单编号[2].机场」由[1]修改为[2]
「BList集合.订单编号[3]」由[[主键]=3 ,[机场]=3 ]被删除
「开始时间」由[2019-09-09 02:01:54]被删除
「价格」被添加成[50.852236]
也可以使用AbstractObjectDiff+DiffWapper扩展自己的格式输出.
public class ChineseObjectDiff extends AbstractObjectDiff {
@Override
protected String genDiffStr(Object sourceObject, Object targetObject) throws Exception {
List diffWappers = generateDiff(sourceObject, targetObject);
return DiffUtils.genDiffStr(diffWappers);
}
}