inputStream 与 String 的互相转换

一. String 转换为InputStream

String str = "String 与 inputStream转换";

InputStream ins1 = new ByteArrayInputStream(str.getBytes());

InputStream ins2 = new ByteArrayInputStream(str.getBytes("UTF-8"));

二. InputStream 转为 String

方法一：利用bufferedReader

public String convertToString(InputStream is){

BufferedReader bReader = new BufferedReader(new InputStreamReader(is));

StringBuffer buffer = new StringBuffer();

String line = null;

try {

while((line = bReader.readLine())!=null){

buffer.append(line);

}

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}finally{

    try {

bReader.close();

} catch (IOException e) {

    // TODO Auto-generated catch block

    e.printStackTrace();

}

}

return buffer.toString();

}

方法二：

public String convertToString(InputStream is){

StringBuffer buffer = new StringBuffer();

byte[] b = new byte[1024];

try {

for(int n; (n = is.read(b))!=-1;)

buffer.append(new String(b,0,n));

    return buffer.toString();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}finally{

    try {

is.close();

} catch (IOException e) {

    // TODO Auto-generated catch block

    e.printStackTrace();

}

}

}

方法三：

public String convertToString(InputStream is){

ByteArrayOutputStream os = new ByteArrayOutputStream();

int i = -1;

try {

while((i = is.read())!=-1){

os.write(i);

}

return os.toString();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

return null;

}finally{

    try {

os.close();

} catch (IOException e) {

    // TODO Auto-generated catch block

    e.printStackTrace();

}

}

}