java对象值比较

1. 依赖包

<dependency>
    <groupId>de.danielbechler</groupId>
    <artifactId>java-object-diff</artifactId>
    <version>0.95</version>
</dependency>

2. 测试

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang3.StringUtils;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import com.alibaba.fastjson2.JSON;

import de.danielbechler.diff.ObjectDifferBuilder;
import de.danielbechler.diff.node.DiffNode;

// @RunWith(SpringRunner.class)
// @SpringBootTest(classes = SsmpScaffoldApplication.class)
public class TestObject {

    @BeforeEach
    public void setUp() {
    }

    @Test
    public void compareObj() {
       try {
          SaveSysAdminUserRequest request1 = new SaveSysAdminUserRequest();
          request1.setId(null);
          request1.setUserName("admin");
          request1.setPassword("888888");
          request1.setEmail("admimn@163.com");
          request1.setMobile("13599991123");
          request1.setNickName("管理员");
          request1.setGender(1);
          request1.setStatus(1);
          request1.setSort(1);

          SaveSysAdminUserRequest request2 = new SaveSysAdminUserRequest();
          request2.setId(11L);
          request2.setUserName("system");
          request2.setGender(2);
          request2.setStatus(0);
          request2.setSort(3);

          DiffNode diffNode = ObjectDifferBuilder.buildDefault().compare(request1, request2);

          List<ObjCompareResult> diffList = new ArrayList<>();

          diffNode.visit((node, visit) -> {
             final Object baseValue = node.canonicalGet(request1);
             final Object workingValue = node.canonicalGet(request2);
//           final String message = node.getPath() + " changed from " + baseValue + " to " + workingValue;
//           System.out.println(message);

             if (!"/".equals(node.getPath().toString())) {
                // 属性
                String field = node.getPath().toString();

                if (StringUtils.isNotBlank(field) && field.startsWith("/")) {
                   field = field.substring(1);
                }
                ObjCompareResult result = new ObjCompareResult();
                result.setObj("com.wjh.ssmpscaffold.ssmp.request.SaveSysAdminUserRequest");
                result.setObjDesc("保存管理端用户 请求参数");
                result.setField(field);
                result.setOldValue(baseValue == null ? "" : baseValue.toString());
                result.setNewValue(workingValue == null ? "" : workingValue.toString());
                result.setModule("ssmp");

                diffList.add(result);
             }
          });

          System.out.println(JSON.toJSONString(diffList));

       } catch (Exception e) {
          e.printStackTrace();
       }
    }
}

3. 要测试的 JavaBean

import java.io.Serial;
import java.io.Serializable;

import io.swagger.v3.oas.annotations.media.Schema;
import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.NotNull;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.ToString;

@Data
@EqualsAndHashCode(callSuper = false)
@ToString(callSuper = true)
public class SaveSysAdminUserRequest implements Serializable {
    @Serial
    private static final long serialVersionUID = 1375192067610030189L;

    @Schema(description = "用户id")
    private Long id;

    /** 登录账号 */
    @Schema(description = "登录账号")
    @NotBlank(message = "账号不能为空")
    private String userName;

    /** 密码 */
    @Schema(description = "密码")
    private String password;

    /** 邮箱 */
    @Schema(description = "邮箱")
    private String email;

    /** 手机号 */
    @Schema(description = "手机号")
    private String mobile;

    /** 用户昵称 */
    @Schema(description = "用户昵称")
    @NotBlank(message = "昵称不能为空")
    private String nickName;

    /** 性别（0:所有, 1:男, 2:女） */
    @Schema(description = "性别（0:所有, 1:男, 2:女）", example = "1")
    @NotNull(message = "性别不能为空")
    private Integer gender;

    /** 头像地址 */
    @Schema(description = "头像地址")
    private String avatar;

    /** 状态（0->禁用；1->启用） */
    @Schema(description = "状态（0->禁用；1->启用）", example = "1")
    private Integer status;

    /** 排序 */
    @Schema(description = "排序", example = "1")
    private Integer sort;
}

4. 对象比较结果类

import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.ToString;

/**
 * 对象值比较结果
 * 
 * @author wenjianhai
 * @date 2024/5/8
 * @since JDK 17
 */
@Data
@EqualsAndHashCode(callSuper = false)
@ToString(callSuper = true)
public class ObjCompareResult {
    /** 对象 */
    private String obj;
    /** 对象描述 */
    private String objDesc;
    /** 对象属性 */
    private String field;
    /** 对象属性旧值 */
    private String oldValue;
    /** 对象属性新值 */
    private String newValue;
    /** 所属模块 */
    private String module;
}