import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;
import java.util.Map;
import com.bjsxt.test.bean.User;
/**
* 通过反射获取泛型信息
* @author dell
*
*/
public class Demo04 {
public void test01(Map<String,User> map,List<User> list){
System.out.println("Demo04.test01()");
}
public Map<Integer,User> test02(){
System.out.println("Demo04.test02()");
return null;
}
public static void main(String[] args) {
try {
//获得指定方法参数泛型信息
Method m = Demo04.class.getMethod("test01", Map.class,List.class);
Type[] t = m.getGenericParameterTypes();
for (Type paramType : t) {
System.out.println("#"+paramType);
if(paramType instanceof ParameterizedType){
Type[] genericTypes = ((ParameterizedType) paramType).getActualTypeArguments();
for (Type genericType : genericTypes) {
System.out.println("泛型类型:"+genericType);
}
}
}
//获得指定方法返回值泛型信息
Method m2 = Demo04.class.getMethod("test02", null);
Type returnType = m2.getGenericReturnType();
if(returnType instanceof ParameterizedType){
Type[] genericTypes = ((ParameterizedType) returnType).getActualTypeArguments();
for (Type genericType : genericTypes) {
System.out.println("返回值,泛型类型:"+genericType);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;
import java.util.Map;
import com.bjsxt.test.bean.User;
/**
* 通过反射获取泛型信息
* @author dell
*
*/
public class Demo04 {
public void test01(Map<String,User> map,List<User> list){
System.out.println("Demo04.test01()");
}
public Map<Integer,User> test02(){
System.out.println("Demo04.test02()");
return null;
}
public static void main(String[] args) {
try {
//获得指定方法参数泛型信息
Method m = Demo04.class.getMethod("test01", Map.class,List.class);
Type[] t = m.getGenericParameterTypes();
for (Type paramType : t) {
System.out.println("#"+paramType);
if(paramType instanceof ParameterizedType){
Type[] genericTypes = ((ParameterizedType) paramType).getActualTypeArguments();
for (Type genericType : genericTypes) {
System.out.println("泛型类型:"+genericType);
}
}
}
//获得指定方法返回值泛型信息
Method m2 = Demo04.class.getMethod("test02", null);
Type returnType = m2.getGenericReturnType();
if(returnType instanceof ParameterizedType){
Type[] genericTypes = ((ParameterizedType) returnType).getActualTypeArguments();
for (Type genericType : genericTypes) {
System.out.println("返回值,泛型类型:"+genericType);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}