import java.lang.annotation.*;@Documented
@Target(ElementType.FIELD)
@Inherited
@Retention(RetentionPolicy.RUNTIME )
public @interface MyAnno {/*** 是否能为null* @return*/boolean isCanNull() default true;/*** 是否能为空字符串* @return*/boolean isCanEmpty() default true;/*** 是否能为0* @return*/boolean isCanZero() default true;
}

public class Mouse {@MyAnno(isCanNull=true)private  String name;@MyAnno(isCanNull = false,isCanZero = false)private  int age;@MyAnno(isCanNull = false)private String address;@MyAnno(isCanZero = false)private double money;public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public double getMoney() {return money;}public void setMoney(double money) {this.money = money;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}
}

package com.vweb.util;import com.vweb.webapp.Mouse;
import com.vweb.webapp.MyAnno;
import com.vweb.webapp.TestUtil;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.List;

public class IntactCheckUtil {public static boolean check(Object obj){// list = Arrays.asList(AnnotationParsing.class.getClassLoader().loadClass(((Class)obj).getClass().getName()).getDeclaredFields());List<Field>  list = Arrays.asList(obj.getClass().getDeclaredFields());for(int i=0;i<list.size();i++){Field field = list.get(i);if(field.isAnnotationPresent(MyAnno.class)){//是否使用MyAnno注解for (Annotation anno : field.getDeclaredAnnotations()) {//获得所有的注解if(anno.annotationType().equals(MyAnno.class) ){//找到自己的注解if(!((MyAnno)anno).isCanNull()){//注解的值if(TestUtil.getFieldValueByName(field.getName(),obj)==null){throw new RuntimeException("类："+Mouse.class+"的属性："+field.getName()+"不能为空，实际的值:"+TestUtil.getFieldValueByName(field.getName(),obj)+",注解：field.getDeclaredAnnotations()");}}if(!((MyAnno)anno).isCanEmpty()){if(TestUtil.getFieldValueByName(field.getName(),obj).equals("")){throw new RuntimeException("类："+Mouse.class+"的属性："+field.getName()+"不能为空字符串，实际的值:"+TestUtil.getFieldValueByName(field.getName(),obj)+",注解：field.getDeclaredAnnotations()");}}if(!((MyAnno)anno).isCanZero()){if(TestUtil.getFieldValueByName(field.getName(),obj).toString().equals("0") || TestUtil.getFieldValueByName(field.getName(),obj).toString().equals("0.0")){throw new RuntimeException("类："+Mouse.class+"的属性："+field.getName()+"不能为空字符0，实际的值:"+TestUtil.getFieldValueByName(field.getName(),obj)+",注解：field.getDeclaredAnnotations()");}}}}}}return  true;}
}