1、使用org.springframework.beans.BeanUtils.copyProperties方法进行对象之间属性的赋值，避免通过get、set方法一个一个属性的赋值
/**
* 对象属性拷贝 <br>
* 将源对象的属性拷贝到目标对象
*
* @param source 源对象
* @param target 目标对象
*/
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集合之间的对象属性赋值
/**
* @param input 输入集合
* @param clzz 输出集合类型
* @param <E> 输入集合类型
* @param <T> 输出集合类型
* @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;
}
比如有两个类，User和Employee，将存储Employee对象的List赋给存储User对象的List。
User类：
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类：
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 + '\'' +
'}';
}
}
测试类：
@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("-------------分割线--------------");
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);
}
}
}
