java 读取本地文件实例
例1
读取本地例子，出现错误自己去寻找相应的jar包！
<table width="620" align="center" border="0" cellpadding="1" cellspacing="1" style="background:#FB7"> <tr> <td width="464" height="27" bgcolor="#FFE7CE"> 代码如下</td> <td width="109" align="center" bgcolor="#FFE7CE" style="cursor:pointer;" onclick="doCopy('copy5764')">复制代码</td> </tr> <tr> <td height="auto" colspan="2" valign="top" bgcolor="#FFFFFF" style="padding:10px;" class="copyclass" id=copy5764>package loginQQ;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
public class LoadingRead {
/**
* 读取配置文件
*/
public static void main(String[] args) {
String endcode = "GBK";
File file = new File("D:/Java/YT/src/com/YT/auto/word.ini");
InputStreamReader in = null;
StringBuffer pzFile = new StringBuffer();
try{
if(file.isFile() && file.exists()){//判断是否有文件
//避免汉字编码问题
in = new InputStreamReader(new FileInputStream(file) , endcode);
BufferedReader buffer = new BufferedReader(in);
String lineText = null;
while((lineText = buffer.readLine()) != null){
pzFile.append(lineText);
}
System.out.println(pzFile);
}else{
System.out.println("抱歉哦，没有找到ini文件");
}
}catch (Exception e) {
e.printStackTrace();
}
}
}
例2
<table width="620" align="center" border="0" cellpadding="1" cellspacing="1" style="background:#FB7"> <tr> <td width="464" height="27" bgcolor="#FFE7CE"> 代码如下</td> <td width="109" align="center" bgcolor="#FFE7CE" style="cursor:pointer;" onclick="doCopy('copy7530')">复制代码</td> </tr> <tr> <td height="auto" colspan="2" valign="top" bgcolor="#FFFFFF" style="padding:10px;" class="copyclass" id=copy7530>package my.test;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
/**
*
* @author zhouhh
* @date 2013.3.14
* merge files to hdfs
*/
public class testhdfspaths {
public static void main(String[] args) throws IOException {
String sourceFile = "";
String targetFile = "";
if (args.length < 2) {
sourceFile = "/home/zhouhh/test";
targetFile = "hdfs://hadoop48:54310/user/zhouhh";
} else {
sourceFile = args[0];
targetFile = args[1];
}
Configuration conf = new Configuration();
FileSystem hdfs = FileSystem.get(conf);
FileSystem local = FileSystem.getLocal(conf);
try {
visitPath(local,sourceFile);
visitPath(hdfs,targetFile);
} catch (IOException e) {
e.printStackTrace();
}
}
public static void visitPath(FileSystem fs,String path) throws IOException
{
Path inputDir = new Path(path);
FileStatus[] inputFiles = fs.listStatus(inputDir);
if(inputFiles==null)
{
throw new IOException(" the path is not correct:" path);
}
System.out.println("----------------path:" path "----------------");
for (int i = 0; i < inputFiles.length; i ) {
if(inputFiles[i].isDir())
{
System.out.println(inputFiles[i].getPath().getName() " -dir-");
visitPath(fs,inputFiles[i].getPath().toString());
}
else
{
System.out.println(inputFiles[i].getPath().getName() ",len:" inputFiles[i].getLen());
}
}
}
}
输出：
----------------path:/home/zhouhh/test----------------
HelloWorldApp.class,len:432
a.scm,len:99
jar -dir-
----------------path:file:/home/zhouhh/test/jar----------------
Test.jar,len:1040
name.txt,len:389211
jdk-6u38-linux-amd64.rpm,len:58727459
hbase_thrift.tar.gz,len:770987
src -dir-
...
----------------path:hdfs://hadoop48:54310/user/zhouhh----------------
README.txt,len:1399
a,len:0
fsimage,len:9358
gz -dir-
----------------path:hdfs://hadoop48:54310/user/zhouhh/gz----------------
abs.gz,len:309589
mytest.txt,len:20
output -dir-
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