首先，我使用mvn和正确设置的环境变量构建了hadoop-2.7.2。然后，我尝试在apache网站上运行一个简单的示例：c api libhdfs示例代码

# include "hdfs.h"

int main(int argc, char**argv) {

  hdfsFS fs = hdfsConnect("default", 0);
  const char* writePath = "/tmp/testfile.txt";
  hdfsFile writeFile = hdfsOpenFile(fs, writePath, O_WRONLY |O_CREAT, 0, 0, 0);
  if(!writeFile) {
      fprintf(stderr, "Failed to open %s for writing!\n", writePath);
      exit(-1);
  }
  char* buffer = "Hello, World!";
  tSize num_written_bytes = hdfsWrite(fs, writeFile, (void*)buffer, strlen(buffer)+1);
  if (hdfsFlush(fs, writeFile)) {
       fprintf(stderr, "Failed to 'flush' %s\n", writePath);
      exit(-1);
  }
  hdfsCloseFile(fs, writeFile);
}

然后我得到如下错误信息：
$could not find method create from class org/apache/hadoop/fs/filesystem with signature（lorg/apache/hadoop/fs/path；lorg/apache/hadoop/fs/permission/fspermission；zisjilorg/apache/hadoop/util/progressible；z） lorg/apache/hadoop/fs/fsdataoutputstream；
线程“main”java.lang.nosuchmethoderror中的$exception:创建
$call to org.apache.hadoop.conf.filesystem:：create（（lorg/apache/hadoop/fs/path；lorg/apache/hadoop/fs/permission/fspermission；zisjilorg/apache/hadoop/util/progressible；z） lorg/apache/hadoop/fs/fsdataoutputstream；）失败！
但是我确实可以在org.apache.hadoop.fs.filesystem:org.apache.hadoop.fs.filesystem函数列表中找到“create”函数
有人知道发生了什么吗？