zookeeper javaapi 的使用测试

http://search.maven.org/中查询到zookeeper的依赖

在pom.xml中加入

  <dependency>      <groupId>org.apache.zookeeper</groupId>      <artifactId>zookeeper</artifactId>      <version>3.4.5</version>  </dependency>

创建测试类并加入代码

package com.unique.hadoop;import junit.framework.TestCase;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.fs.*;import org.apache.hadoop.hdfs.DistributedFileSystem;import org.apache.hadoop.hdfs.server.common.JspHelper;import org.apache.hadoop.io.IOUtils;import org.apache.hadoop.util.Options;import org.apache.hadoop.util.Progressable;import org.junit.After;import org.junit.Before;import org.junit.Test;import java.io.BufferedInputStream;import java.io.FileInputStream;import java.io.InputStream;import java.net.URI;import java.net.URL;public class HdfsApp {    public  static final String HDFS_PATH = "hdfs://hadoop0:8020";    FileSystem fileSystem = null;    Configuration configuration = null;    @Test    public void urlCat() throws Exception{        URL.setURLStreamHandlerFactory(new FsUrlStreamHandlerFactory());        URL url = new URL("hdfs://hadoop0:8020/tmp/urltest.txt");        InputStream in = url.openStream();        IOUtils.copyBytes(in,System.out,4096,false);        IOUtils.closeStream(in);    }    public void mkdir() throws Exception{        fileSystem.mkdirs(new Path("/hdfsapi/test"));    }    @Test    public void createFile()throws Exception{        FSDataOutputStream outputStream = fileSystem.create(new Path("/hdfsapi/test/aaa.txt"));        outputStream.write("hello hadoop".getBytes());        outputStream.flush();        outputStream.close();    }    @Test    public void cat()throws Exception{        FSDataInputStream inputStream = fileSystem.open(new Path("/tmp/urltest.txt"));        IOUtils.copyBytes(inputStream,System.out,1024);        inputStream.close();    }    /**     *     * 重命名     */    @Test    public void copyFromLocalFile()throws Exception{        Path localPath = new Path("D:/c.txt");        Path hdfsPath = new Path("/hdfsapi/test/");        fileSystem.copyFromLocalFile(localPath,hdfsPath);    }    @Test    public void copyFromLocalFileWithProgress()throws Exception{        InputStream in = new BufferedInputStream(                new FileInputStream("D:/programmer/java/maven/apache-maven-3.5.0-bin.zip"));        FSDataOutputStream outputStream =  fileSystem.create(new Path("/hdfsapi/test/maven.zip"), new Progressable() {            public void progress() {                System.out.println(".");            }        });        IOUtils.copyBytes(in,outputStream,4096);    }    @Test    public void copyToLocalFile() throws Exception{        Path localPath = new Path("D:/c.txt");        Path hdfsPath = new Path("/hdfsapi/test/cc.txt");        fileSystem.copyToLocalFile(false,hdfsPath,localPath,true);    }    @Test    public void delete()throws  Exception{        fileSystem.delete(new Path("/tmp/10000_access.log"),true);    }    @Test    public void listFile()throws Exception{        FileStatus[] fileStatuses = fileSystem.listStatus(new Path("/hdfsapi/"));        for(FileStatus fileStatus : fileStatuses){            String isDir = fileStatus.isDirectory() ? "directory":"file";            short replication  = fileStatus.getReplication();            long len = fileStatus.getLen();            String path = fileStatus.getPath().getName();            System.out.println(isDir+"\t"+replication+"\t"+len+"\t"+path);        }    }    @Test    public void rename() throws Exception{        Path oldPath = new Path("/hdfsapi/test/aaa.txt");        Path newPath = new Path("/hdfsapi/test/bbbb.txt");        fileSystem.rename(oldPath,newPath);    }    @Before    public void setUp() throws Exception{        System.out.println("setUp");        configuration = new Configuration();        configuration.addResource("core-site.xml");        configuration.addResource("hdfs-site.xml");        fileSystem = FileSystem.get(new URI(HDFS_PATH),configuration,"hadoop");    }    @After    public void tearDown()throws Exception{        System.out.println("teatDown");        configuration = null;        fileSystem = null;    }}