如標題所示，遍歷文件夾下的所有文件，主要功能如下：

傳入一個路徑，讀取路徑里面所有的文件
遍歷讀取的文件，判斷當前文件是文件還是文件夾
當前目錄為文件，打印出當前文件絕對路徑
當前目錄為文件夾，獲取文件夾路徑，繼續讀取路徑下文件
遍歷完目錄中的所有文件為止
代碼中用到的幾個方法

path.resolve(path)

一個路徑或路徑片段解析成一個絕對路徑，返回解析后的路徑字符串
fs.readdir(path[,option],callback)

讀取目錄下面的文件，返回目錄下的文件列表對象，如果傳入的是個文件，返回這個文件

fs.stat(path,callback)

獲取文件信息對象Stats，包括文件大小，gid等信息

stats.isFile()

文件信息對象Stats的一個方法，判斷當前文件是不是一個文件

stats.isDirectory()

文件信息對象Stats的一個方法，判斷當前文件是不是一個文件夾

代碼和注釋如下：

var fs = require('fs');var path = require('path');//解析需要遍歷的文件夾，我這以E盤根目錄為例var filePath = path.resolve('E:');//調用文件遍歷方法fileDisplay(filePath);/** * 文件遍歷方法 * @param filePath 需要遍歷的文件路徑 */function fileDisplay(filePath){  //根據文件路徑讀取文件，返回文件列表  fs.readdir(filePath,function(err,files){    if(err){      console.warn(err)    }else{      //遍歷讀取到的文件列表      files.forEach(function(filename){        //獲取當前文件的絕對路徑        var filedir = path.join(filePath,filename);        //根據文件路徑獲取文件信息，返回一個fs.Stats對象        fs.stat(filedir,function(eror,stats){          if(eror){            console.warn('獲取文件stats失敗');          }else{            var isFile = stats.isFile();//是文件            var isDir = stats.isDirectory();//是文件夾            if(isFile){              console.log(filedir);            }            if(isDir){              fileDisplay(filedir);//遞歸，如果是文件夾，就繼續遍歷該文件夾下面的文件            }          }        })      });    }  });}

運行結果為：

E:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/AbstractCacheInvoker.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/AbstractCacheResolver.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/BasicOperation.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/CacheableOperation.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/BeanFactoryCacheOperationSourceAdvisor.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/AbstractFallbackCacheOperationSource.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/CacheAspectSupport.CacheOperationContext.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/CacheAspectSupport.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/CacheAspectSupport.CacheOperationMetadata.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/CacheErrorHandler.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/CacheEvictOperation.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/CacheInterceptor.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/CacheOperation.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/CacheOperationInvocationContext.htmlE:/jars/spring-framework-4.2.9.RELEASE/docs/javadoc-api/org/springframework/cache/interceptor/CacheOperationInvoker.html············