An example Analysis of the assignment order of BeanUtils.copyProperties () Parameter
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Catalogue
The assignment order of the BeanUtils.copyProperties () parameter
The first experience of BeanUtils.copyProperties and the explanation of the meaning of its parameters
Use
Case: create a source class: source
Create a target target source class
Create a test class test
IgnoreProperties parameter
Case
Case testing
The assignment order of the BeanUtils.copyProperties () parameter
BeanUtils.copyProperties has two different jar packages, introducing different packages and assigning values in a different order.
They are:
Org.springframework.beans.BeanUtilsorg.apache.commons.beanutils.BeanUtils
If you introduce 1, you will assign x to y.
If you introduce 2, you assign y to x.
The first experience of BeanUtils.copyProperties and the use of explaining the meaning of its parameters
BeanUtils.copyProperties is a property assignment between objects under the org.springframework.beans.BeanUtils; package, which avoids the routine operation of get and then set attribute values one by one, and is very easy to use.
Case: create a source class: 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 +'\'+'}' }} create a target target source class 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 +'\'+'}' }} create test class testimport 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 ("1111"); bo.setUsername ("333"); book2 bo2=new book2 () BeanUtils.copyProperties (bo,bo2); System.out.println (bo.toString ()); System.out.println (bo2.toString ());}}
The results show:
IgnoreProperties parameter
IgnoreProperties parameter means to ignore a parameter so that it is not copied, and you can write multiple ignored parameters.
Case 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 ("1111"); bo.setUsername ("333"); book2 bo2=new book2 () BeanUtils.copyProperties (bo,bo2, username, password); System.out.println (bo.toString ()); System.out.println (bo2.toString ());}
The results show:
There is also the Class editable parameter in the source code, which I don't know much about, but I can only put target (target class).
Case test public static void main (String [] args) {book bo=new book (); bo.setEmail ("1111"); bo.setPassword ("222nd"); bo.setUsername ("333"); book2 bo2=new book2 (); BeanUtils.copyProperties (bo,bo2,book2.class); System.out.println (bo.toString ()); System.out.println (bo2.toString ());}
The results are as follows:
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