Java Object Clone
User user = new User();
user.setName("tom");
User user1 = new User();
user1.setName("jerry");
Listlist = new ArrayList<>();
list.add(user1);
user.setChildren(list);
user.setUser(user1);
System.out.println(user);
User2 user2 = new User2();
BeanUtils.copyProperties(user2,user);
System.out.println(user2);
Listchildren = user2.getChildren(); // 此处会出现错误
for (User2 user21 :children ) {
System.out.println(user21);
}
User user3 = (User) BeanUtils.cloneBean(user);
System.out.println(user3);user:
package com.test;import java.util.List;public class User { private String name; private List children; private User user; public User getUser() { return user;
} public void setUser(User user) { this.user = user;
}
@Override public String toString() { return "User{" +
"name='" + name + '\'' +
", children=" + children +
", user=" + user +
'}';
} public String getName() { return name;
} public void setName(String name) { this.name = name;
} public List getChildren() { return children;
} public void setChildren(List children) { this.children = children;
}
}user2:
package com.test;import java.util.List;public class User2 { private String name; private List children; private User2 user2; public User2 getUser2() { return user2;
} public void setUser2(User2 user2) { this.user2 = user2;
}
@Override public String toString() { return "User2{" +
"name='" + name + '\'' +
", children=" + children +
", user2=" + user2 +
'}';
} public String getName() { return name;
} public void setName(String name) { this.name = name;
} public List getChildren() { return children;
} public void setChildren(List children) { this.children = children;
}
}pom:
https://mvnrepository.com/artifact/commons-beanutils/commons-beanutils --><dependency> <groupId>commons-beanutilsgroupId> <artifactId>commons-beanutilsartifactId> <version>1.9.3version>dependency>
注意和spring beanutils的区别：
https://blog.csdn.net/langqiao123/article/details/72961383/
传说spring Beanutils的性能要更好一些；
