1、使用org.springframework.beans.BeanUtils.copyProperties方法進行物件之間屬性的賦值，避免通過get、set方法一個一個屬性的賦值

/**
  * 物件屬性拷貝 <br>
  * 將源物件的屬性拷貝到目標物件
  *
  * @param source 源物件
  * @param target 目標物件
  */
 public static void copyProperties(Object source,Object target) {
  try {
   BeanUtils.copyProperties(source,target);
  } catch (BeansException e) {
   LOGGER.error("BeanUtil property copy failed :BeansException",e);
  } catch (Exception e) {
   LOGGER.error("BeanUtil property copy failed:Exception",e);
  }
 }

2、List集合之間的物件屬性賦值

/**
  * @param input 輸入集合
  * @param clzz 輸出集合型別
  * @param <E> 輸入集合型別
  * @param <T> 輸出集合型別
  * @return 返回集合
  */
 public static <E,T> List<T> convertList2List(List<E> input,Class<T> clzz) {
  List<T> output = Lists.newArrayList();
  if (CollectionUtils.isNotEmpty(input)) {
   for (E source : input) {
    T target = BeanUtils.instantiate(clzz);
    BeanUtil.copyProperties(source,target);
    output.add(target);
   }
  }
  return output;
 }

比如有兩個類，User和Employee，將儲存Employee物件的List賦給儲存User物件的List。

User類：

public class User {
 private String name;
 private Integer age;
 
 public String getName() {
  return name;
 }
 
 public void setName(String name) {
  this.name = name;
 }
 
 public Integer getAge() {
  return age;
 }
 
 public void setAge(Integer age) {
  this.age = age;
 }
 
 @Override
 public String toString() {
  return "User{" +
    "name='" + name + '\'' +
    ",age=" + age +
    '}';
 }
}

Employee類：

public class Employee {
 private String name;
 
 private Integer age;
 private String dept;
 
 public Employee(String name,Integer age,String dept) {
  this.name = name;
  this.age = age;
  this.dept = dept;
 }
 
 public String getName() {
  return name;
 }
 
 public void setName(String name) {
  this.name = name;
 }
 
 public Integer getAge() {
  return age;
 }
 
 public void setAge(Integer age) {
  this.age = age;
 }
 
 public String getDept() {
  return dept;
 }
 
 public void setDept(String dept) {
  this.dept = dept;
 }
 
 @Override
 public String toString() {
  return "Employee{" +
    "name='" + name + '\'' +
    ",age=" + age +
    ",dept='" + dept + '\'' +
    '}';
 }
}

測試類：

@RunWith(PowerMockRunner.class)
public class TestUtil
{
 @Test
 public void test(){
  Employee ee1=new Employee("A",21,"it");
  Employee ee2=new Employee("B",23,"account");
  User user=new User();
  BeanUtil.copyProperties(ee1,user);
  System.out.println(user);
  System.out.println("-------------分割線--------------");
  List<User> output=new ArrayList<>();
  List<Employee> source= Arrays.asList(ee1,ee2);
  output=BeanUtil.convertList2List(source,User.class);
  for (User str:output) {
   System.out.println(str);
  }
 }
}

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