BeanUtils.copyProperties()参数的赋值顺序
BeanUtils.copyProperties(x,y)有两个不同的jar包,引入不同的包,赋值的顺序不一样。
分别是:
org.springframework.beans.BeanUtils
org.apache.commons.beanutils.BeanUtils
引入 1 的话,是将 x 赋值给 y
引入 2 的话,是将 y 赋值给 x
BeanUtils.copyProperties初体验,及其参数含义解释
用处
BeanUtils.copyProperties是org.springframework.beans.BeanUtils;包下得一个用于对象间得属性赋值,避免了常规操作得一个个get再set属性值,非常好用
案例: 创建一个源类:source
private String username; private String password; private String email; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } @Override public String toString() { return "book{" + "username="" + username + """ + ", password="" + password + """ + ", email="" + email + """ + "}"; } }
创建一个目标target源类
private String username; private String password; private String email; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } @Override public String toString() { return "book{" + "username="" + username + """ + ", password="" + password + """ + ", email="" + email + """ + "}"; } }
创建测试类test
import com.sdqj.system_integration.domain.book; import com.sdqj.system_integration.domain.book2; import org.springframework.beans.BeanUtils; public class test { public static void main(String[] args) { book bo=new book(); bo.setEmail("1111"); bo.setPassword("222"); bo.setUsername("333"); book2 bo2=new book2(); BeanUtils.copyProperties(bo,bo2); System.out.println(bo.toString()); System.out.println(bo2.toString()); } }
结果展示:
ignoreProperties参数
ignoreProperties参数意思是忽略某个参数,使其不被复制,可写多个被忽略得参数
案例
import com.sdqj.system_integration.domain.book; import com.sdqj.system_integration.domain.book2; import org.springframework.beans.BeanUtils; public class test { public static void main(String[] args) { book bo=new book(); bo.setEmail("1111"); bo.setPassword("222"); bo.setUsername("333"); book2 bo2=new book2(); BeanUtils.copyProperties(bo,bo2,"username","password"); System.out.println(bo.toString()); System.out.println(bo2.toString()); }
结果展示:
还有源代码中得Class<?> editable参数,不太了解其中得含义,但只能放target(目标类)
案例测试
public static void main(String[] args) { book bo=new book(); bo.setEmail("1111"); bo.setPassword("222"); bo.setUsername("333"); book2 bo2=new book2(); BeanUtils.copyProperties(bo,bo2,book2.class); System.out.println(bo.toString()); System.out.println(bo2.toString()); }
结果如下:
以上为个人经验,希望能给大家一个参考,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/qiangzai725/article/details/91981960