的Java反射-Spring如何識別參數是用戶定義的對象或原始類型

Question

我能找到的所有的方法和參數的方法需要使用反射，下面是我做的方式：

HexgenClassUtils hexgenClassUtils = new HexgenClassUtils(); 
     Class cls; 


     try { 
      List classNames = hexgenClassUtils.findMyTypes("com.hexgen.*"); 
      Iterator<Class> it = classNames.iterator(); 
      while(it.hasNext()) 
      { 

       Class obj = it.next(); 
       System.out.println("Methods available in : "+obj.getName()); 
       System.out.println("==================================="); 
       //if(obj.getName().equals("com.hexgen.api.facade.HexgenWebAPI")){ 
        cls = Class.forName(obj.getName()); 
        Method[] method = cls.getDeclaredMethods(); 
        int i=1; 

        for (Method method2 : method) { 
         PreAuthorize preAuthorizeAnnotation = method2.getAnnotation(PreAuthorize.class); 
         if(preAuthorizeAnnotation !=null){ 
          System.out.println(+i+":Method Name : "+method2.getName()); 
          RequestMapping methodRequestMappingAnnotation = method2.getAnnotation(RequestMapping.class); 
          //RequestMethod[] methods = methodRequestMappingAnnotation.method(); // to get the request method type 
          mappingValues = methodRequestMappingAnnotation.value(); // to get the url value 
          System.out.println("URL Value : "+mappingValues[0]); 
          Class[] parameterTypes = method2.getParameterTypes(); 
          for (Class class1 : parameterTypes) { 
           System.out.println("Parameter Type : "+class1.getName()); 
          } 
          i++; 
         } 

        } 
       //} 

      } 

     } catch (Exception ex) { 
      ex.printStackTrace(); 
     } 

這是實用程序類別I：

package com.hexgen.tools; 

import java.io.IOException; 
import java.util.ArrayList; 
import java.util.List; 

import org.springframework.core.io.Resource; 
import org.springframework.core.io.support.PathMatchingResourcePatternResolver; 
import org.springframework.core.io.support.ResourcePatternResolver; 
import org.springframework.core.type.classreading.CachingMetadataReaderFactory; 
import org.springframework.core.type.classreading.MetadataReader; 
import org.springframework.core.type.classreading.MetadataReaderFactory; 
import org.springframework.stereotype.Controller; 
import org.springframework.util.ClassUtils; 
import org.springframework.util.SystemPropertyUtils; 

public class HexgenClassUtils { 
    @SuppressWarnings({ "rawtypes"}) 
    public List<Class> findMyTypes(String basePackage) throws IOException, ClassNotFoundException 
    { 
     ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver(); 
     MetadataReaderFactory metadataReaderFactory = new CachingMetadataReaderFactory(resourcePatternResolver); 

     List<Class> candidates = new ArrayList<Class>(); 
     String packageSearchPath = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + 
            resolveBasePackage(basePackage) + "/" + "**/*.class"; 
     Resource[] resources = resourcePatternResolver.getResources(packageSearchPath); 
     for (Resource resource : resources) { 
      if (resource.isReadable()) { 
       MetadataReader metadataReader = metadataReaderFactory.getMetadataReader(resource); 
       if (isCandidate(metadataReader)) { 
        candidates.add(Class.forName(metadataReader.getClassMetadata().getClassName())); 
       } 
      } 
     } 
     return candidates; 
    } 
    public String resolveBasePackage(String basePackage) { 
     return ClassUtils.convertClassNameToResourcePath(SystemPropertyUtils.resolvePlaceholders(basePackage)); 
    } 

    @SuppressWarnings({ "rawtypes", "unchecked" }) 
    public boolean isCandidate(MetadataReader metadataReader) throws ClassNotFoundException 
    { 
     try { 
      Class c = Class.forName(metadataReader.getClassMetadata().getClassName()); 
      if (!c.isInterface() && c.getAnnotation(Controller.class) != null) { 
       return true; 
      } 
     } 
     catch(Throwable e){ 
     } 
     return false; 
    } 

} 

並且輸出是：

Methods available in : com.hexgen.api.facade.HexgenWebAPI 
=================================== 
1:Method Name : createRequisition 
URL Value : /trade/createrequisition 
Parameter Type : [Lcom.hexgen.ro.request.CreateRequisitionRO; 
Parameter Type : boolean 
2:Method Name : createOrder 
URL Value : /trade/createorder 
Parameter Type : com.hexgen.ro.request.CreateOrderRO 
Parameter Type : boolean 
3:Method Name : RetrieveReportFields 
URL Value : /reports/fields 
Parameter Type : java.math.BigDecimal 
4:Method Name : generateURL 
URL Value : /reports/generateurl 
Parameter Type : com.hexgen.ro.request.GenerateURLRO 

例如：

參數類型：[Lcom.hexgen.ro.request.CreateRequisitionRO; 參數類型：布爾

first one is user defined array of object and the second one is Primitive type 

如何通過反射標識該怎麼也找說法是物體或不數組。

請說明。

問候

Answer 1

您可以使用isArray()檢查參數類型爲數組或不。

在你的代碼，這將是class1.isArray()

除了元每一件事情是對象。

我不知道一個簡單的方法，但你可以檢查是否class1.getComponentType()與Integer.TYPE, Double.TYPE, Boolean.TYPE, etc.不匹配，即所有原語，那麼你有一個對象。

Answer 2

Class#isPrimitive()必須是你要找的。