本文转载自csdn文章：关于java中 renameTo()方法的不成功
今天为了给文件重新命名，怎么着也不能成功
[java] view plain copy if(f.renameTo(new File(path + "/" +newname))) System.out.println(path + "/" +newname + "has renamed"); 后来各种百度，有说文件名不能带变量的，有说地址不能出现“_” "-" ":"等符号的，我都试了，最后发现时因为我之前用到的BefferedReader进行读操作之后，没有关闭，导致不能重新命名，但是比较蛋疼的就是他并没有报错，就是不能重新命名，最后我把BefferedReader关了就好使了函数如下
[java] view plain copy import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; public class stringtest { public static void main(String args[]) throws IOException, FileNotFoundException{ String[] keywords={"事故","死亡","受伤","失踪","损失","伤亡","灾区","救灾","灾害","受灾","救灾","救援"}; //事故关键字 int wordCount = 0; //一共多少起带关键字的文件 String path = "D:/renminribaoData/from1to10000"; //文件夹地址 File file = new File(path); String fileNames[] = file.list(); for(int i = 0 ;i< 5;i++){ BufferedReader br = new BufferedReader(new FileReader(path + "/" + fileNames[i])); System.out.println("正在匹配" + fileNames[i]); //读取BufferedRead的内容称String型 String temp = ""; String s = ""; String newname = ""; while((temp = br.readLine()) != null) { s = s + temp; } for(int j = 0 ; j < keywords.length; j++){ if(s.contains(keywords[j])){ System.out.println(fileNames[i] + "含有关键字"); File f = new File(path + "/" + fileNames[i]); // System.out.println(path + "\\" + fileNames[i]); // if(!fileNames[i].contains("Y_")) System.out.println("exist!"); // else System.out.println("no!"); // br.close(); 就是这个地方 一定不能忘记关掉啊 if(f.exists()&& !fileNames[i].contains("Y") ) newname = "Y" + fileNames[i]; System.out.println(newname); if(f.renameTo(new File(path + "/" +newname))) System.out.println(path + "/" +newname + "has renamed"); wordCount++; break; } else{ //如果不带关键字进行的操作 } } } System.out.println("一共有" + wordCount + "个带有关键字的文件"); } }