JarCastingxkbeancomparator是一个java bean对比修改并输出差异的工具。
xkbeancomparator is a Java bean contrast modification and outputs the difference.
0.依赖 dependency：
<dependency>
<groupId>com.github.xkzhangsan</groupId>
<artifactId>xkbeancomparator</artifactId>
<version>0.0.3</version>
</dependency>
1.常见用处 Common use：
（1）对修改过的对象进行对比生成修改日志The modified objects are compared to generate a change log ；
（2）对比部分字段修改，根据字段注释输出日志Compare partial field modifications and output the log based on field comments 。
2.主要功能类和用法 Main function classes and usage：
主要类名称 Class：BeanComparator.java
主要方法为 Method ：
public static String compareBean(Object source, Object target)
public static CompareResult getCompareResult(Object source, Object target)
3 实例 xkbeancomparator-samples （ https://github.com/xkzhangsan/xkbeancomparator-samples ）
（1）添加pom依赖
<dependency>
<groupId>com.github.xkzhangsan</groupId>
<artifactId>xkbeancomparator</artifactId>
<version>0.0.2</version>
</dependency>
（2）java bean类 User
import java.math.BigDecimal;
public class User {
Integer id;
String name;
private BigDecimal point;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public BigDecimal getPoint() {
return point;
}
public void setPoint(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<String, String> 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.
（7）目前只支持基本类型的对比，不支持集合等复杂类型对比。
欢迎提建议 Suggestions are welcome！