java 读取文件内容
String与InputStream互转的几种方法
package com.circle.core.util;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
public class FileReader {
/**
* 利用BufferedReader实现Inputstream转换成String <功能详细描述>
*
* @param in
* @return String
*/
public static String Inputstr2Str_Reader(InputStream in, String encode) {
String str = "";
try {
if (encode == null || encode.equals("")) {
// 默认以utf-8形式
encode = "utf-8";
}
BufferedReader reader = new BufferedReader(new InputStreamReader(in, encode));
StringBuffer sb = new StringBuffer();
while ((str = reader.readLine()) != null) {
sb.append(str).append("\n");
}
return sb.toString();
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return str;
}
/**
* 利用byte数组转换InputStream------->String <功能详细描述>
*
* @param in
* @return
* @see [类、类#方法、类#成员]
*/
public static String Inputstr2Str_byteArr(InputStream in, String encode) {
StringBuffer sb = new StringBuffer();
byte[] b = new byte[1024];
int len = 0;
try {
if (encode == null || encode.equals("")) {
// 默认以utf-8形式
encode = "utf-8";
}
while ((len = in.read(b)) != -1) {
sb.append(new String(b, 0, len, encode));
}
return sb.toString();
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
/**
* 利用ByteArrayOutputStream：Inputstream------------>String <功能详细描述>
*
* @param in
* @return
* @see [类、类#方法、类#成员]
*/
public static String Inputstr2Str_ByteArrayOutputStream(InputStream in, String encode) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] b = new byte[1024];
int len = 0;
try {
if (encode == null || encode.equals("")) {
// 默认以utf-8形式
encode = "utf-8";
}
while ((len = in.read(b)) > 0) {
out.write(b, 0, len);
}
return out.toString(encode);
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
/**
* 利用ByteArrayInputStream：String------------------>InputStream <功能详细描述>
*
* @param inStr
* @return
* @see [类、类#方法、类#成员]
*/
public static InputStream Str2Inputstr(String inStr) {
try {
// return new ByteArrayInputStream(inStr.getBytes());
return new ByteArrayInputStream(inStr.getBytes("UTF-8"));
//return new StringBufferInputStream(inStr);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}