java读取文件

import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


public class FileRead {
static Logger log=LoggerFactory.getLogger(FileRead.class);
public void readFile(String path){
File file=new File(path);
if(!file.exists()){
log.error("文件"+path+"不存在");
}

try {
InputStream in=new FileInputStream(file);
String content=getFullContent(in,"UTF-8");
System.out.println("content:sys:"+content);
log.debug("content:"+content);


//System.out.println("content:sys:"+getFullContent4(in,"UTF-8"));
} catch (FileNotFoundException e) {
log.error("文件"+path+"不存在");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public static String getFullContent(InputStream in,String charset){

StringBuffer sb=new StringBuffer();
InputStreamReader inr = null;
try {
inr=new InputStreamReader(in,charset);
char[] ch=new char[1024];
int readCount=0;
while((readCount=inr.read(ch))!=-1){
sb.append(ch, 0, readCount);
}
} catch (UnsupportedEncodingException e) {
log.error("流数据编码失败");
} catch (IOException e) {
log.error("读取IO流失败",e);
}finally{
try {
inr.close();
in.close();
} catch (IOException e) {

e.printStackTrace();
}
}
return sb.toString();
}

public static byte[] readBytes(InputStream in){

BufferedInputStream bi=new BufferedInputStream(in);
ByteArrayOutputStream ba=new ByteArrayOutputStream(1024);

byte[] b=new byte[1024];
int size=0;
try {
while((size=bi.read(b))!=-1){
ba.write(b, 0, size); 
}
} catch (IOException e) {

e.printStackTrace();
}finally{
try {
bi.close();
in.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
byte[] content=ba.toByteArray();

        try {
        ba.flush(); 
ba.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} 
return content;
}

public static String getFullContent4(InputStream in, String charset) throws UnsupportedEncodingException { 
        byte[]bytes=readBytes(in); 
        return new String(bytes,charset); 
    }
/**
* @param args
*/
public static void main(String[] args) {
FileRead fileRead=new FileRead();
fileRead.readFile("D://qnproc.sql");


}

}