场景:根据方法上的注解,通过java反射方式找到需要执行的的方法。
/* *注解作用在方法上*/@Target ({ElementType.METHOD})/* *注解的生命周期一直程序运行时都存在VM运行期间保留注解,可以通过反射机制读取注解信息*/@Retention (RetentionPolicy.RUNTIME)/* *注解包含在Javadoc中*/@Documented
@ interface公共项{
字符串值();
}
公开课WorkService {
私有静态日志记录器=LoggerFactory.getLogger (WorkService.class);
@Item (“1001”)
公共int getItem1001Info (GirlVo女孩){
logger.info (“getItem1001Info输出:”);
logger.info (girl.toString ());
返回1;
}
@Item (“1002”)
公共int getItem1002Info (GirlVo女孩){
logger.info (“getItem1002Info输出:”);
logger.info (girl.toString ());
返回1;
}
@Item (“1003”)
公共int getItem1003Info (GirlVo女孩){
logger.info (“getItem1003Info输出:”);
logger.info (girl.toString ());
返回1;
}
@Item (“1004”)
公共int getItem1004Info (GirlVo女孩){
logger.info (“getItem1004Info输出:”);
logger.info (girl.toString ());
返回1;
}
@Item (“1005”)
公共int getItem1005Info (GirlVo女孩){
logger.info (“getItem1005Info输出:”);
logger.info (girl.toString ());
返回1;
}
@Item (“1006”)
公共int getItem1006Info (GirlVo女孩){
logger.info (“getItem1006Info输出:”);
logger.info (girl.toString ());
返回1;
}
}
公共类GirlVo实现Serializable {
私有静态最终长serialVersionUID=-8545755852948661858 l;/* * ID号*/私人字符串girlId;/* *姓名*/私人字符串girlName;/* *年龄*/私人长年龄;/* *身高*/私人双高度;/* *罩杯*/私人字符串cupSize;
公共字符串getGirlId () {
返回girlId;
}
公共空间setGirlId(字符串girlId) {
这一点。girlId=girlId;
}
公共字符串getGirlName () {
返回girlName;
}
公共空间setGirlName(字符串girlName) {
这一点。girlName=girlName;
}
公共长getAge () {
返回年龄;
}
公共空间setAge(长年龄){
这一点。年龄=年龄;
}
公共双获得(){
回报高;
}
公共空间setHeight(双高度){
这一点。身高=身高;
}
公共字符串getCupSize () {
返回cupSize;
}
公共空间setCupSize(字符串cupSize) {
这一点。cupSize=cupSize;
}
@Override
公共字符串toString () {
返回“GirlVo girlId=" + girlId
+”,girlName=" + girlName
+”、年龄=" +的年龄
+”,身高=" +高度
+”,cupSize=" + cupSize
+“]”;
}
}
List方法=MethodUtils.getMethodsListWithAnnotation (clazz Item.class);
(方法方法:方法){
(注释注释:method.getDeclaredAnnotations ()) {
如果(注释instanceof项){
字符串代码=((项)注释)value ();
如果对象。=(项目、代码)){
尝试{
logger.info(“注解号:“+代码+“执行开始…”);
method.invoke (clazz.newInstance (), girlVo);
logger.info(“注解号:“+代码+“执行结束…”);
}捕捉(异常e) {
e.printStackTrace ();
logger.info(“抛异常…”);
}
}
}
}
}
}
}
公开课TestAnnotation {
私有静态日志记录器=LoggerFactory.getLogger (TestAnnotation.class);
公共静态void main (String [] args)抛出ClassNotFoundException {
logger.info(“测试开始……”);
Object> HashMap<字符串;地图=(HashMap<字符串,Object>) getData ();/* *遍历hashMap */(Entry<字符串,Object>条目:map.entrySet ()) {
字符串条目=entry.getKey ();
GirlVo GirlVo=(GirlVo) entry.getValue ();
ReflectCallMethodAnnotation.annotationMethod(项目,girlVo);
}
logger.info(“测试结束……”);
}
公共静态地图getData () {
Object> HashMap<字符串;data=https://www.yisu.com/zixun/new HashMap ();
GirlVo girlVo1=new GirlVo ();
girlVo1.setGirlId (“1001”);
girlVo1.setGirlName(“张一”);
girlVo1.setAge (27);
girlVo1.setHeight (169);
girlVo1.setCupSize (“F”);
GirlVo girlVo2=new GirlVo ();
girlVo2.setGirlId (“1002”);
girlVo2.setGirlName(“王二”);
girlVo2.setAge (29);
girlVo2.setHeight (175);
girlVo2.setCupSize (" B ");
GirlVo girlVo3=new GirlVo ();
girlVo3.setGirlId (“1003”);
girlVo3.setGirlName(“刘五”);
girlVo3.setAge (24);
girlVo3.setHeight (160);
girlVo3.setCupSize (" B ");
GirlVo girlVo4=new GirlVo ();
girlVo4.setGirlId (“1004”);
girlVo4.setGirlName(“陈六”);
girlVo4.setAge (21);
girlVo4.setHeight (168);
girlVo4.setCupSize (“C”);
GirlVo girlVo5=new GirlVo ();
girlVo5.setGirlId (“1005”);
girlVo5.setGirlName(“赵七”);
girlVo5.setAge (25);
girlVo5.setHeight (169);
girlVo5.setCupSize (“C”);
GirlVo girlVo6=new GirlVo ();
girlVo6.setGirlId (“1006”);
girlVo6.setGirlName(“张八”);
girlVo6.setAge (26);
girlVo6.setHeight (165);
girlVo6.setCupSize (“A”);
数据。put (" 1001 ", girlVo1);
数据。put (" 1002 ", girlVo2);
数据。put (" 1003 ", girlVo3);
数据。put (" 1004 ", girlVo4);
数据。put (" 1005 ", girlVo5);
数据。put (" 1006 ", girlVo6);
返回数据;
}
}
