简单一个例子。其中正则是取消多余空格或者tab键
java" id="highlighter_94157">
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package test4; import java.io.bufferedreader;import java.io.filereader;import java.io.ioexception; public class explacesql { public static void main(string[] args) { 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
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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); } }} |
以上这篇java实现读取txt文件并以在每行以空格取数据就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/shunzi1046/article/details/54928238
