Java基础(四）io 流之间的转化工具类

迈不过友情╰ 2022-02-17 13:22 175阅读 0赞

** 方式一：**

public class ConvertStreamUtils {
        // inputStream转outputStream
        public static ByteArrayOutputStream parse(InputStream in) throws Exception {
            ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
            int ch;
            while ((ch = in.read()) != -1) {
                swapStream.write(ch);
            }
            return swapStream;
        }
    
        // outputStream转inputStream
        public static ByteArrayInputStream parse(OutputStream out) throws Exception {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            baos = (ByteArrayOutputStream) out;
            ByteArrayInputStream swapStream = new ByteArrayInputStream(baos.toByteArray());
            return swapStream;
        }
    
        // inputStream转String
        public static String parse_String(InputStream in) throws Exception {
            ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
            int ch;
            while ((ch = in.read()) != -1) {
                swapStream.write(ch);
            }
            return swapStream.toString();
        }
    
        // OutputStream 转String
        public static String parse_String(OutputStream out) throws Exception {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            baos = (ByteArrayOutputStream) out;
            ByteArrayInputStream swapStream = new ByteArrayInputStream(baos.toByteArray());
            return swapStream.toString();
        }
    
        // String转inputStream
        public static ByteArrayInputStream parse_inputStream(String in) throws Exception {
            ByteArrayInputStream input = new ByteArrayInputStream(in.getBytes());
            return input;
        }
    
        // String 转outputStream
        public static ByteArrayOutputStream parse_outputStream(String in) throws Exception {
            return parse(parse_inputStream(in));
        }
    }

**方式二：（推荐）**

参看https://blog.csdn.net/qq\_24607837/article/details/102565728