BeanUtils.populate的用法

记录一个小方法，加强记忆。

其完整方法为BeanUtils.populate( Object bean, Map properties )

这个方法会遍历map<key,value>中的key，如果bean中有这个属性，就把key中对应的value值赋值给bean的属性

eg：

一个实体类：

public class User {
    private Integer id;
    private String name;
    private Integer age;
    private String address;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    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 getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", age=" + age +
                ", address='" + address + '\'' +
                '}';
    }

测试方法：

    public static void main(String[] args) throws InvocationTargetException, IllegalAccessException {
        Map<String,Object> param = new HashMap<>();
        param.put("name","张三");
        param.put("age",18);
        param.put("address","松花江");

        User user = new User();
        BeanUtils.populate(user,param);
        System.out.println(user);
    }

运行结果：

 可见，此方法会将我们map中含有user对象的属性赋值给user对象。