对于一个自定义的pojo User代码如下
public class User {
private String userName; public User(String userName) {
this.userName = userName;
} public String getUserName() {
return userName;
} public void setUserName(String userName) {
this.userName = userName;
}
}User user = new User("wanghaisheng");怎样通过迭代输出它的属性名=值对呢?
如打印出:userName="wanghaisheng"
假设该POJO的属性名对外界是透明的,亦或者该POJO有百个以上的属性,怎样获得该pojo实例的名值对呢?
public class User {
private String userName; public User(String userName) {
this.userName = userName;
} public String getUserName() {
return userName;
} public void setUserName(String userName) {
this.userName = userName;
}
}User user = new User("wanghaisheng");怎样通过迭代输出它的属性名=值对呢?
如打印出:userName="wanghaisheng"
假设该POJO的属性名对外界是透明的,亦或者该POJO有百个以上的属性,怎样获得该pojo实例的名值对呢?
private String userName; public User(String userName) {
this.userName = userName;
} public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public static void main(String[] args) throws IllegalArgumentException, IllegalAccessException{
User user = new User("wanghaisheng");
Field[] fields = User.class.getDeclaredFields();
for(Field f : fields){
System.out.println(f.getName()+"=\""+f.get(user)+"\"");
}
}
}