```bashimport java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException; /** * PCM 转 MP3 * * @author laowang * @since 2020-04-02 */public class PcmTomp3 { /** * @param src 待转换文件路径 * @param target 目标文件路径(该工具是在源文件的基础上形成另一个文件，target样例：D:/landscape/music/25745664665456.mp3,必须写完，否则报io“无法访问错误” * @throws IOException 抛出异常 */ public static String convertAudioFiles(String src, String target) throws IOException { FileInputStream fis = new FileInputStream(src); FileOutputStream fos = new FileOutputStream(target); //计算长度 byte[] buf = new byte[1024 * 4]; int size = fis.read(buf); int PCMSize = 0; while (size != -1) { PCMSize += size; size = fis.read(buf); } fis.close(); //填写参数、比特率等。这里用的是16个单声道 8000 hz WaveHeader header = new WaveHeader(); //长度字段 = 内容的大小（PCMSize) + 头部字段的大小(不包括前4字节的标识符RIFF和filelength本身的4字节) header.fileLength = PCMSize + (44 - 8); header.FmtHdrLeth = 16; header.BitsPerSample = 16; header.Channels = 1; header.FormatTag = 0x0001; header.SamplesPerSec = 16000; header.BlockAlign = (short) (header.Channels * header.BitsPerSample / 8); header.AvgBytesPerSec = header.BlockAlign * header.SamplesPerSec; header.DataHdrLeth = PCMSize; byte[] h = header.getHeader(); assert h.length == 44; ///WAV标准，头部应为44字节 //write header fos.write(h, 0, h.length); //write data stream fis = new FileInputStream(src); size = fis.read(buf); while (size != -1) { fos.write(buf, 0, size); size = fis.read(buf); } fis.close(); fos.close(); System.out.println("PCM Convert to MP3 OK!"); return "ok"; }}``````bash import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException; /** * PCM 转 WAV * * @author laowang * @since 2020-04-02 */public class PcmToWav { /** * @param src 待转换文件路径 * @param target 目标文件路径 * @throws IOException 抛出异常 */ public static void convertAudioFiles(String src, String target) throws IOException { FileInputStream fis = new FileInputStream(src); FileOutputStream fos = new FileOutputStream(target); //计算长度 byte[] buf = new byte[1024 * 4]; int size = fis.read(buf); int PCMSize = 0; while (size != -1) { PCMSize += size; size = fis.read(buf); } fis.close(); //填写参数、比特率等。这里用的是16个单声道 8000 hz WaveHeader header = new WaveHeader(); //长度字段 = 内容的大小（PCMSize) + 头部字段的大小(不包括前4字节的标识符RIFF和filelength本身的4字节) header.fileLength = PCMSize + (44 - 8); header.FmtHdrLeth = 16; header.BitsPerSample = 16; header.Channels = 2; header.FormatTag = 0x0001; header.SamplesPerSec = 8000; header.BlockAlign = (short) (header.Channels * header.BitsPerSample / 8); header.AvgBytesPerSec = header.BlockAlign * header.SamplesPerSec; header.DataHdrLeth = PCMSize; byte[] h = header.getHeader(); assert h.length == 44; ///WAV标准，头部应为44字节 // write header fos.write(h, 0, h.length); // write data stream fis = new FileInputStream(src); size = fis.read(buf); while (size != -1) { fos.write(buf, 0, size); size = fis.read(buf); } fis.close(); fos.close(); System.out.println("Convert OK!"); }}```**waveHeader处理函数**```bashpackage com.test.shell;import java.io.ByteArrayOutputStream;import java.io.IOException;public class WaveHeader { public final char fileID[] = {'R', 'I', 'F', 'F'}; public int fileLength; public char wavTag[] = {'W', 'A', 'V', 'E'};; public char FmtHdrID[] = {'f', 'm', 't', ' '}; public int FmtHdrLeth; public short FormatTag; public short Channels; public int SamplesPerSec; public int AvgBytesPerSec; public short BlockAlign; public short BitsPerSample; public char DataHdrID[] = {'d','a','t','a'}; public int DataHdrLeth; public byte[] getHeader() throws IOException { ByteArrayOutputStream bos = new ByteArrayOutputStream(); WriteChar(bos, fileID); WriteInt(bos, fileLength); WriteChar(bos, wavTag); WriteChar(bos, FmtHdrID); WriteInt(bos,FmtHdrLeth); WriteShort(bos,FormatTag); WriteShort(bos,Channels); WriteInt(bos,SamplesPerSec); WriteInt(bos,AvgBytesPerSec); WriteShort(bos,BlockAlign); WriteShort(bos,BitsPerSample); WriteChar(bos,DataHdrID); WriteInt(bos,DataHdrLeth); bos.flush(); byte[] r = bos.toByteArray(); bos.close(); return r; } private void WriteShort(ByteArrayOutputStream bos, int s) throws IOException { byte[] mybyte = new byte[2]; mybyte[1] =(byte)( (s << 16) >> 24 ); mybyte[0] =(byte)( (s << 24) >> 24 ); bos.write(mybyte); } private void WriteInt(ByteArrayOutputStream bos, int n) throws IOException { byte[] buf = new byte[4]; buf[3] =(byte)( n >> 24 ); buf[2] =(byte)( (n << 8) >> 24 ); buf[1] =(byte)( (n << 16) >> 24 ); buf[0] =(byte)( (n << 24) >> 24 ); bos.write(buf); } private void WriteChar(ByteArrayOutputStream bos, char[] id) { for (int i=0; i<id.length; i++) { char c = id[i]; bos.write(c); } }}**写博客要负责人，最好不要发没有质量保证的东西！以免耽误孩子和兄弟的时间！以免耽误孩子和兄弟的时间！**```
湘公网安备43019002002060