簡單一個例子。其中正則是取消多餘空格或者tab鍵
package test4; import java.io.BufferedReader;import java.io.FileReader;import java.io.IOException; public class ExplaceSql {public static void main(String[] args) { String filePath = ExplaceSql.class.getResource("").getPath()+"aaa.txt"; // 文件路徑read(filePath);}/** * 讀取內容*/public static String read(String filePath){BufferedReader br = null;String line =null;//StringBuffer buf = new StringBuffer();try {//根據文件路徑創建緩衝輸入流br = new BufferedReader(new FileReader(filePath));//filePath中是aaa.txt文件String str = "";//循環讀取文件的每一行，對需要修改的行進行修改，放入緩衝對像中while ((line = br.readLine()) != null) { //設置正則將多餘空格都轉為一個空格str=line+"/r/n"; String[] dictionary = str.split("//s{2,}|/t"); for(int i=0;i<dictionary.length;i++){str = "insert into tablename values("+ dictionary[0]+",'"+dictionary[1]+"',"+dictionary[2]+"')"; } System.out.println(str); }} catch (Exception e) {e.printStackTrace();}finally { if (br != null) {// 關閉流try { br.close(); } catch (IOException e) { br = null; } }}return null;}}java逐行讀寫txt文件
package help; import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.util.HashMap;import java.util.Map; public class TXTParseUtils { private static final Integer ONE = 1; public static void main(String[] args) { Map<String, Integer> map = new HashMap<String, Integer>(); /* 讀取數據*/ try { BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(new File("D:/報銷.txt")), "UTF-8")); String lineTxt = null; while ((lineTxt = br.readLine()) != null) { String[] names = lineTxt.split(","); for (String name : names) { if (map.keySet().contains(name)) { map.put(name, (map.get(name) + ONE)); } else { map.put(name, ONE); } } } br.close(); } catch (Exception e) { System.err.println("read errors :" + e); } /* 輸出數據*/ try { BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File("D:/結果.txt")), "UTF-8")); for (String name : map.keySet()) { bw.write(name + " " + map.get(name)); bw.newLine(); } bw.close(); } catch (Exception e) { System.err.println("write errors :" + e); } }}以上這篇java實現讀取txt文件並以在每行以空格取數據就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持武林網。