1、对应的IP
2、将打印的文本文件
1 import java.io.ByteArrayOutputStream; 2 import java.io.File; 3 import java.io.FileInputStream; 4 import java.io.IOException; 5 import java.io.InputStream; 6 import java.io.OutputStream; 7 import java.net.InetSocketAddress; 8 import java.net.Socket; 9 10 public class PrintBySocket 11 { 12 13 private static String ip = "172.16.12.251";// 更改成网络打印机的IP 14 15 private static int port = 9100;// 更改成网络打印机的端口 16 17 private static int timeout = 1000;// 设置超时时间 18 19 public static void main(String[] args) 20 throws Exception 21 { 22 String filepath = "C:\RFID2.txt";// 指令文件存放的位置 23 File file = new File(filepath); 24 byte[] command = new byte[10]; 25 String label = null; 26 if (file.exists()) 27 {// 检查指令文件存在不存在 28 InputStream is = new FileInputStream(file); 29 ByteArrayOutputStream out = new ByteArrayOutputStream(); 30 int len = 0; 31 while ((len = is.read(command)) > 0) 32 { 33 out.write( 34 command, 0, len); 35 } 36 // label = new String(out.toByteArray(),"utf-8"); 37 label = new String(out.toByteArray(), "gbk"); 38 System.out.println(label); 39 } 40 else 41 {// 指令文件不存在则直接返回 42 System.out.println("指令文件不存在"); 43 return; 44 } 45 46 Socket s = null; 47 OutputStream writer = null; 48 try 49 { 50 s = new Socket(); 51 s.connect(new InetSocketAddress(ip, port)); 52 s.setSoTimeout(timeout); 53 writer = s.getOutputStream(); 54 byte[] bytes; 55 // bytes = label.getBytes("utf-8"); 56 bytes = label.getBytes("gbk"); 57 writer.write( 58 bytes, 0, bytes.length); 59 writer.flush(); 60 } 61 catch (IOException e) 62 { 63 throw new RuntimeException("试图连接到打印机的时候发生错误，请检查你的网络连接，并确认打印机已经开机!", e); 64 } 65 finally 66 { 67 if (writer != null) 68 { 69 try 70 { 71 writer.close(); 72 } 73 catch (Exception e) 74 { 75 } 76 } 77 if (s != null) 78 { 79 try 80 { 81 s.close(); 82 } 83 catch (Exception e) 84 { 85 } 86 } 87 } 88 } 89 }