java 每日习题（六）从文件收集数据记录到mysql

1. mysql建库，建表

2. 准备数据文件cpu.txt

1447836374319,169,0,0
1447836375346,498,0,0
1447836376346,250,0,0
1447836377347,0,0,0
1447836378347,497,0,0
1447836379347,0,0,0
1447836380347,498,0,0
1447836381348,0,0,0
1447836382348,498,0,0
1447836383348,0,0,0
1447836384348,248,0,0
1447836385348,0,0,0

3. 收集数据记录到mysql

　　使用到的类说明：

　　3.1  File 获取文件句柄，File实例代表一个本地文件。

　　3.2  FileInputStream is meant for reading streams of raw bytes such as image data. 

　　3.3  An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified charset.

　　3.4  BufferedReader: Reads text from a character-input stream, buffering characters so as to provide for the efficient reading of characters, arrays, and lines.

package collect_part;

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

public class CollectData {

    public static void main(String[] args) {

        String path = "d:\logs\cpu.txt";
        CollectData data = new CollectData();
        data.readFile(path);
        
    }

    public void readFile(String filePath) {
        InfoBean infoBean = new InfoBean();
        try {
            String encodeing = "GBK";
            File file = new File(filePath);
            if (file.isFile() && file.exists()) {
                InputStreamReader isr = new InputStreamReader(new FileInputStream(file), encodeing);
                BufferedReader bufferedReader = new BufferedReader(isr);
                String lineTxt = null;
                OperationDB opdb = new OperationDB();
                while ((lineTxt = bufferedReader.readLine()) != null) {
                    String[] s = lineTxt.split(",");
                    //System.out.println(s[0].toString() + s[1].toString() + s[2].toString() + s[3].toString() );
                    infoBean.setTimeStamp(s[0].toString());
                    infoBean.setElapsed(s[1].toString());
                    infoBean.setGrpThreads(s[2].toString());
                    infoBean.setAllThreads(s[3].toString());
                    opdb.addRcorder(infoBean);
                    System.out.println(lineTxt);
                }

                isr.close();

            } else {
                System.out.println("not found specific file");
            }
        } catch (Exception e) {
            System.out.println("read file content error");
            e.printStackTrace();
        }

    }
}

创建连接

package collect_part;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;

public class MysqlConnection {
    public static Connection getConnection() {

        Connection conn = null;
        String url = "jdbc:mysql://10.1.1.148:3306/testresults";
        String user = "user";
        String password = "passwd";

        try {

            conn = DriverManager.getConnection(url, user, password);
        } catch (SQLException ex) {
            Logger.getLogger(MysqlConnection.class.getName()).log(Level.SEVERE,null, ex);
        }
        return conn;

    }
}

操作数据库

package collect_part;

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 conn = null;

    public void addRcorder(InfoBean infoBean) throws SQLException {
        if (conn == null) {
            conn = MysqlConnection.getConnection();
        }

        String sql = "INSERT INTO cpuInfo (`timeStamp`, `elapsed`, `grpThreads`, `allThreads`) VALUES (?, ?, ?, ?)";

        PreparedStatement pstmt = conn.prepareStatement(sql);
        pstmt.setLong(1, infoBean.getTimeStamp());
        pstmt.setLong(2, infoBean.getElapsed());
        pstmt.setLong(3, infoBean.getGrpThreads());
        pstmt.setLong(4, infoBean.getAllThreads());

        pstmt.executeUpdate();
    }
}

记录信息

package collect_part;

public class InfoBean {

    long timeStamp;
    long elapsed;
    long grpThreads;
    long allThreads;
    
    public long getTimeStamp() {
        return timeStamp;
    }
    public void setTimeStamp(String timeStamp) {
        this.timeStamp = Long.parseLong(timeStamp);
    }
    public long getElapsed() {
        return elapsed;
    }
    public void setElapsed(String elapsed) {
        this.elapsed = Long.parseLong(elapsed);
    }
    public long getGrpThreads() {
        return grpThreads;
    }
    public void setGrpThreads(String grpThreads) {
        this.grpThreads = Long.parseLong(grpThreads);
    }
    public long getAllThreads() {
        return allThreads;
    }
    public void setAllThreads(String allThreads) {
        this.allThreads = Long.parseLong(allThreads);
    }

    
    
}