Java读取txt文件内容。可以作如下理解：
首先获得一个文件句柄。File file = new File();file即为文件句柄。两人之间连通电话网络了。接下来可以开始打电话了。
通过这条线路读取甲方的信息：new FileInputStream(file)目前这个信息已经读进来内存当中了。接下来需要解读成乙方可以理解的东西
既然你使用了FileInputStream()。那么对应的需要使用InputStreamReader()这个方法进行解读刚才装进来内存当中的数据
解读完成后要输出呀。那当然要转换成IO可以识别的数据呀。那就需要调用字节码读取的方法BufferedReader()。同时使用bufferedReader()的readline(）方法读取txt文件中的每一行数据哈。
package taxidata;
import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.InputStreamReader;
public class ReadFile {
publicstatic void readTxtFile(String filePath) { InfoBean infoBean=new InfoBean(); try { String encoding = "GBK"; File file = new File(filePath); if (file.isFile() && file.exists()){ //判断文件是否存在 InputStreamReader read = new InputStreamReader( new FileInputStream(file), encoding);//考虑到编码格式 BufferedReader bufferedReader = new BufferedReader(read); String lineTxt = null; OperationDB operationDB=new OperationDB(); while ((lineTxt = bufferedReader.readLine()) != null) { String[] s=lineTxt.split(","); infoBean.setLicense_num(s[0].toString()); infoBean.setRecordtime(s[1].toString()); infoBean.setSet_num(Integer.valueOf(s[2])); infoBean.setSpeed(Integer.valueOf(s[3])); infoBean.setElevation(Double.valueOf(s[4])); String location="point"+"("+Double.valueOf(s[6])+""+Double.valueOf(s[5])+")"; infoBean.setLocation(location); operationDB.addRcorder(infoBean); System.out.println(lineTxt); } read.close(); } else { System.out.println("找不到指定的文件"); } } catch (Exception e) { System.out.println("读取文件内容出错"); e.printStackTrace(); } } }
JAVA连接数据库 类
package taxidata;
import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.util.logging.Level; import java.util.logging.Logger;
public class BeyondbConnection { public static Connection getConnection() {
Connection con = null; String url = "jdbc:beyondb://localhost:II7/store "; String user = "suo"; String password = "123456";
try {
con = DriverManager.getConnection(url, user, password); } catch (SQLException ex) { Logger.getLogger(BeyondbConnection.class.getName()).log(Level.SEVERE,null, ex); } return con;
} }
InfoBean类创建 类
package taxidata;
public class InfoBean {
String license_num; String recordtime; int set_num; int speed; Double elevation; String location;
public InfoBean() { }
public String getLicense_num() { return license_num; }
public void setLicense_num(String license_num) { this.license_num = license_num; }
public String getRecordtime() { return recordtime; }
public void setRecordtime(String recordtime) { this.recordtime = recordtime; }
public int getSet_num() { return set_num; }
public void setSet_num(int set_num) { this.set_num = set_num; }
public int getSpeed() { return speed; }
public void setSpeed(int speed) { this.speed = speed; }
public Double getElevation() { return elevation; }
public void setElevation(Double elevation) { this.elevation = elevation; }
public String getLocation() { return location; }
public void setLocation(String location) { this.location = location; } }
数据库操作（向数据库添加数据） 类
package taxidata;
import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.SQLException; import java.util.logging.Level; import java.util.logging.Logger;
public class OperationDB { private Connection con = null; public void addRcorder(InfoBean infoBean) throws SQLException{ if(con ==null){ con = BeyondbConnection.getConnection(); } String sql = "insert into taxidatavalues(?,?,?,?,?,st_geomfromtext(?))"; PreparedStatement pstmt = con.prepareStatement(sql); pstmt.setString(1, infoBean.getLicense_num()); pstmt.setString(2, infoBean.getRecordtime()); pstmt.setInt(3, infoBean.getSet_num()); pstmt.setInt(4, infoBean.getSpeed()); pstmt.setDouble(5, infoBean.getElevation()); pstmt.setString(6,infoBean.getLocation()); pstmt.executeUpdate(); } }
测试主函数 类
package taxidata;
public class Text {
publicstatic void main(String[] args) { String filePath = "C:\\GPS_2012_07_01.TXT"; ReadFile readFile=newReadFile(); readFile.readTxtFile(filePath); } }
//过滤txt中的空行等符号
BufferedReader reader = new BufferedReader( new FileReader( "test.txt" )); PrintStream writer = new PrintStream( new FileOutputStream( "test_new.txt" )); String buf; while ((buf=reader.readLine()) != null ) { if (buf.isEmpty()) { continue ;} if (buf.matches( "[/]+.*" )) { buf = buf.replaceAll( "[/]+(.*)" , "$1" ); //去掉前面的/ } buf = buf.replaceAll( "\\s+(.*)" , $ 1 ); //去掉前面的空格 writer.println(buf); } reader.close(); writer.flush(); writer.close(); 或者下面用下面的代码 if (buf.isEmpty()) { continue ;} buf = buf.replaceAll( "^\\s*([^\\s]*)" , "$1" ); //这样可能保险一些，防止注释的前面有空格 if (buf.matches( "^[/]+.*" )) { buf = buf.replaceAll( "^[/]+(.*)" , "$1" ); //去掉前面的/ } buf = buf.replaceAll( "^\\s*([^\\s]*)" , "$1" ); //去掉前面的空格
