java如何循环名称是递增的实体类的

Question

如题，实体类这边创建的参数名称是递增的，我SQL查询以后怎么在for循环中取出，我不想一个一个get

 

Answer 1

可以利用Java的反射，我写了段代码，你参考下

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Test {
    private String data_date1;
    private String data_date2;
    private String data_date3;

    public String getData_date1() {
        return data_date1;
    }

    public void setData_date1(String data_date1) {
        this.data_date1 = data_date1;
    }

    public String getData_date2() {
        return data_date2;
    }

    public void setData_date2(String data_date2) {
        this.data_date2 = data_date2;
    }

    public String getData_date3() {
        return data_date3;
    }

    public void setData_date3(String data_date3) {
        this.data_date3 = data_date3;
    }

    public static void main(String[] args) {
        Test test = new Test();
        test.setData_date1("abc");
        test.setData_date2("123");
        test.setData_date3("9999");
        Method method = null;
        try {
            for(int i=1;i<=3;i++){
                method = test.getClass().getMethod("getData_date"+i);
                String data_date = (String) method.invoke(test);
                System.out.println(data_date);
            }
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
    }
}