@Controller  
public class TestController {  
     @RequestMapping(value="/user/{userId}/roles/{roleId}",method = RequestMethod.GET)  
     public String getLogin(@PathVariable("userId") String userId,  
         @PathVariable("roleId") String roleId){  
         System.out.println("User Id : " + userId);  
         System.out.println("Role Id : " + roleId);  
         return "hello";  
     }  
     @RequestMapping(value="/product/{productId}",method = RequestMethod.GET)  
     public String getProduct(@PathVariable("productId") String productId){  
           System.out.println("Product Id : " + productId);  
           return "hello";  
     }  
     @RequestMapping(value="/javabeat/{regexp1:[a-z-]+}",  
           method = RequestMethod.GET)  
     public String getRegExp(@PathVariable("regexp1") String regexp1){  
           System.out.println("URI Part 1 : " + regexp1);  
           return "hello";  
     }  
}  

@GetMapping("test1")
public void test1(@RequestParam("name") String name, @RequestParam("age") Integer age) {
}

curl http://127.0.0.1:8080/test1?name=root&age=18

@GetMapping("test2")
public void test2(String name, Integer age) throws Exception {
 
}

public static void main(String[] args) throws Exception {
	Method test1 = UserController.class.getMethod("test1", String.class, Integer.class);
	for (Parameter parameter : test1.getParameters()) {
		RequestParam requestParam = parameter.getAnnotation(RequestParam.class);
		System.err.println("test1-參數(shù)名:" + requestParam.value());
	}
}
控制臺(tái)輸出:
test1-參數(shù)名:name
test1-參數(shù)名:age

public static void main(String[] args) throws Exception {
	Method test2 = UserController.class.getMethod("test2", String.class, Integer.class);
	for (Parameter parameter : test2.getParameters()) {
		System.err.println("test2-參數(shù)名:"+parameter.getName());
	}
}

public class Demo {
 public void test(String name, Integer age) {
 }
}

javac Demo.java #默認(rèn)的編譯方式
javap -verbose Demo

javac -parameters Demo.java #加-parameters參數(shù)編譯
javap -verbose Demo

<dependency>
    <groupId>asm</groupId>
    <artifactId>asm-util</artifactId>
    <version>3.3.1</version>
</dependency>

public class Demo {
	public void test(String name, Integer age) {
	}
	/**
	 * 通過(guò)ASM來(lái)訪問(wèn)參數(shù)名
	 * @param args
	 * @throws Exception
	 */
	public static void main(String[] args) throws Exception {
		Class<Demo> clazz = Demo.class;
		Method method = clazz.getMethod("test", String.class, Integer.class);
		InputStream in = clazz.getResourceAsStream("/" + clazz.getName().replace('.', '/') + ".class");
		ClassReader cr = new ClassReader(in);
		ClassNode cn = new ClassNode();
		cr.accept(cn, ClassReader.EXPAND_FRAMES);
		List<MethodNode> methodNodes = cn.methods;
		for (MethodNode methodNode : methodNodes) {
			if (method.getName().equals(methodNode.name)) {
				System.err.println("test方法參數(shù):");
				List<LocalVariableNode> localVariables = methodNode.localVariables;
				for (LocalVariableNode localVariable : localVariables) {
					System.err.println(localVariable.name);
				}
			}
		}
	}
}