java实现读取txt文件并以在每行以空格取数据

java实现读取txt文件并以在每行以空格取数据

简RLisZsvwwj单一个RLisZsvwwj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 = nullhttp://;

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

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 map = new HashMap();

/* 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);

}

}

}

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 map = new HashMap();

/* 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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