java读取文件夹下所有文件并替换文件每一行中指定的字符串 (一)

[java]
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class ChangeFile {
public static void main(String[] args) {
try {
BufferedReader bufReader = new BufferedReader(new InputStreamReader(new FileInputStream(new File("D:/EntNatureDistributionDAO.txt"))));//数据流读取文件

StringBuffer strBuffer = new StringBuffer();
String empty = "";
String tihuan = "";
for (String temp = null; (temp = bufReader.readLine()) != null; temp = null) {
if(temp.indexOf("/*") != -1 && temp.indexOf("*/") != -1){ //判断当前行是否存在想要替换掉的字符 -1表示存在
tihuan = temp.substring(0, 10);
temp = temp.replace(tihuan, empty);//替换为你想要的东东
}
strBuffer.append(temp);
strBuffer.append(System.getProperty("line.separator"));//行与行之间的分割
}
bufReader.close();
PrintWriter printWriter = new PrintWriter("E:/EntNatureDistributionDAO.txt");//替换后输出的文件位置
printWriter.write(strBuffer.toString().toCharArray());
printWriter.flush();
printWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class ChangeFile {
public static void main(String[] args) {
try {
BufferedReader bufReader = new BufferedReader(new InputStreamReader(new FileInputStream(new File("D:/EntNatureDistributionDAO.txt"))));//数据流读取文件

StringBuffer strBuffer = new StringBuffer();
String empty = "";
String tihuan = "";
for (String temp = null; (temp = bufReader.readLine()) != null; temp = null) {
if(temp.indexOf("/*") != -1 && temp.indexOf("*/") != -1){ //判断当前行是否存在想要替换掉的字符 -1表示存在
tihuan = temp.substring(0, 10);
temp = temp.replace(tihuan, empty);//替换为你想要的东东
}
strBuffer.append(temp);
strBuffer.append(System.getProperty("line.separator"));//行与行之间的分割
}
bufReader.close();
PrintWriter printWriter = new PrintWriter("E:/EntNatureDistributionDAO.txt");//替换后输出的文件位置
printWriter.write(strBuffer.toString().toCharArray());
printWriter.flush();
printWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

适用：如服务器崩溃 导致文件丢失，还原后类文件在每一行的开头都加了很多注释（如下）

[java]
/* */ package com.itown.iesap.starquery.dao;
/* */
/* */ import com.itown.framework.impl.ThreadContext;
/* */ import com.itown.framework.persistence.AbstractDao;
.........很多很多.....

/* */ package com.itown.iesap.starquery.dao;
/* */
/* */ import com.itown.framework.impl.ThreadContext;
/* */ import com.itown.framework.persistence.AbstractDao;
.........很多很多.....

替换之后就是这样的：

[java]
package com.itown.iesap.starquery.dao;

import com.itown.framework.impl.ThreadContext;
import com.itown.framework.persistence.AbstractDao;
.........很多很多......

package com.itown.iesap.starquery.dao;

import com.itown.framework.impl.ThreadCont