String与InputStream相互转换-蒲公英云

String与InputStream相互转换

1.String to InputStream

String str = “String与InputStream相互转换”;

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

InputStream in = new ByteArrayInputStream(str.getBytes(“UTF-8”));

建议使用这种方式，指定编码后不易乱码。

2.InputStream to String

这里提供几个方法。

方法1：

public String convertStreamToString(InputStream is) {

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

    StringBuilder sb = new StringBuilder();   
    String line = null;   
    try \{   
        while ((line = reader.readLine()) != null) \{   
            sb.append(line + "/n");   
        \}   
    \} catch (IOException e) \{   
        e.printStackTrace();   
    \} finally \{   
        try \{   
            is.close();   
        \} catch (IOException e) \{   
            e.printStackTrace();   
        \}   
    \}   
    return sb.toString();   
\}

方法2：

public String inputStream2String (InputStream in) throws IOException {
StringBuffer out = new StringBuffer();
byte[] b = new byte[4096];
for (int n; (n = in.read(b)) != -1;) {
out.append(new String(b, 0, n));
}
return out.toString();
}

方法3：
public static String inputStream2String(InputStream is) throws IOException{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int i=-1;
while((i=is.read())!=-1){
baos.write(i);
}
return baos.toString();
}