commons-beanutil

commons-beanutil简化了内省的操作，底层使用的是内省

所需要的jar包：commons-beanutils.jar，commons-logging.jar

public class Student {
    private int id;
    private String name;
    private String password;

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "Student [id=" + id + ", name=" + name + ", password=" + password
                + "]";
    }

}

public class Demo {
    public static void main(String[] args) throws Exception {
        fun2();
    }


    public static void fun1() throws Exception {
        String className = "com.sflik.entity.Student";
        Class c = Class.forName(className);
        Object stu = c.newInstance();

        //作用一：给javabean对象属性赋值
        BeanUtils.setProperty(stu, "id", 1);
        BeanUtils.setProperty(stu, "name", "zhsangsan");
        BeanUtils.setProperty(stu, "password", "123456");

        //作用二：获取javabean对象属性值
        Object id = BeanUtils.getProperty(stu, "id");
        Object name = BeanUtils.getProperty(stu, "name");
        Object password = BeanUtils.getProperty(stu, "password");
        System.out.println(id +" "+name+" "+password);
        

    }

    public static void fun2() throws Exception {
        //作用三：把map中的数据映射到javabean中
        Map<String,Object> map  = new HashMap<String,Object>();
        map.put("id", 33);
        map.put("name", "lisi");
        map.put("password", "2222");
        Student stu = new Student();
        BeanUtils.populate(stu, map);
        System.out.println(stu);
    }
}