java读取txt文件并以在每行以空格取数据

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简单一个例子。其中正则是取消多余空格或者tab键

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"; // 文件路径 read(filePath);}/** * 读取内容 */public static String read(String filePath){BufferedReader br = null;String line =null;//StringBuffer buf = new StringBuffer();try {//根据文件路径创建缓冲输入流br = new BufferedReader(new FileReader(filePath));//filePath中是aaa.txt文件String str = "";//循环读取文件的每一行，对需要修改的行进行修改，放入缓冲对象中 while ((line = br.readLine()) != null) { //设置正则将多余空格都转为一个空格 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) {// 关闭流               try {                   br.close();               } catch (IOException e) {                     br = null;        }     }}return null;}}

java逐行读写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>();        /* 读取数据 */        try {            BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(new File("D:/报销.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);        }        /* 输出数据 */        try {            BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File("D:/结果.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);        }    }}

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