java beancomparator_使用xkbeancomparator对比javabean，生成操作记录
xkbeancomparator是一个 java bean 对比修改并输出差异的工具。github地址
适用场景：用户编辑提交时，需要记录修改内容，修改前后的值对比，生成操作记录；可以选择记录的字段和字段说明，自定义操作记录。
特点：
jdk 1.7+
不依赖第三方jar，大小非常小
使用反射，调用get方法对比字段值。
(1)添加pom依赖
com.github.xkzhangsan
xkbeancomparator
0.0.1
(2)java bean类 User
importjava.math.BigDecimal;public classUser {
Integer id;
String name;privateBigDecimal point;publicInteger getId() {returnid;
}public voidsetId(Integer id) {this.id =id;
}publicString getName() {returnname;
}public voidsetName(String name) {this.name =name;
}publicBigDecimal getPoint() {returnpoint;
}public voidsetPoint(BigDecimal point) {this.point =point;
}
}
(3)增加辅助日志类 UserLog
import java.util.HashMap;
import java.util.Map;
import com.xkzhangsan.xkbeancomparator.BeanComparator;
import com.xkzhangsan.xkbeancomparator.CompareResult;
public class UserLog{
private static final Map propertyTranslationMap = new HashMap<>();
static {
propertyTranslationMap.put("name", "用户名");
propertyTranslationMap.put("point", "积分");
}
public static CompareResult getCompareResult(Object source, Object target){
return BeanComparator.getCompareResult(source, target, propertyTranslationMap);
}
}
(4) 使用
@Test
public void test1() {
User u1 = new User();
u1.setId(1);
u1.setName("aa");
u1.setPoint(new BigDecimal("111111111111.12"));
User u2 = new User();
u2.setId(1);
u2.setName("aa2");
u2.setPoint(new BigDecimal("111111111111.15"));
CompareResult compareResult = UserLog.getCompareResult(u1, u2);
if (compareResult.isChanged()) {
System.out.println(compareResult.getChangeContent());
}
}
(5)输出结果
用户名:aa->aa2,积分:111111111111.12->111111111111.15,
(6)说明 instructions
上面是推荐用法，使用辅助日志类能统一维护一个java bean的注释map，简化调用。 The recommended usage, above, is to use secondary logging classes to uniformly maintain an annotated map of a Java bean, simplifying invocation.
欢迎提建议 Suggestions are welcome！