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：