hdfs大数据java文件

大数据|java API读取HDFS文件

第2步：创建HDFS测试类文件 image.png 第3步：copy 文件core-site.xml hdfs-site.xml到/opt/tools/workspace/hadoop-hdfs/src/main/resource/目录下第4步利用java的API创建文件系统第5步读取文件 image.png 第6步输出结果读取文件流程图

大数据|java API写入HDFS文件-put

1：创建一个可以上传到hdfs文件系统的文件（wc.input）2：编写java代码调用api完成附件的上传相当于执行-put命令 3：查看执行结果全部代码 package com.lizh.hadoop.hdfs;import java.io.File;import java.io.FileInputStream;import java...

用javaApi访问大数据hdfs文件系统被拒绝访问的问题

问题描述：hdfs文件系统通过外部ip+端口号的方式访问 hdfs:/39.105.xx.xx:8020不成功通过外部ip+端口号的方式访问hdfs:/127.0.0.1:8020 或者hdfs:/内网ip:8020 能访问尝试解决 1.阿里云安全组打开所有tcp协议的端口 2.关闭ecs 防火墙...

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