java实现读取txt文件并以在每行以空格取数据_Java

java实现读取txt文件并以在每行以空格取数据

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);
  }
 }
}

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移动技术网。