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
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 + '\'' +
'}';
}
}
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 + '\'' +
'}';
}
}
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
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）
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。
