Write corpus text to database 20231104

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class BaseDao {
    
    public Connection conn = null;
    public PreparedStatement ps = null;
    public ResultSet rs = null;

    public void getConnection() throws Exception {
        Class.forName("com.mysql.cj.jdbc.Driver");
        conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/languages_material_database?serverTimezone=Asia/Shanghai & amp; & amp;useTimezone=true", "root", "123456");
    }

    public ResultSet executeQuery(String sql, Object[] param) throws Exception {
        this.getConnection();
        ps = conn.prepareStatement(sql);
        if (param != null) {
            for (int i = 0; i < param.length; i + + ) {
                ps.setObject(i + 1, param[i]);
            }
        }
        rs = ps.executeQuery();
        return rs;
    }

    public int executeUpdate(String sql, Object[] param) throws Exception {
        this.getConnection();
        ps = conn.prepareStatement(sql);
        if (param != null) {
            for (int i = 0; i < param.length; i + + ) {
                ps.setObject(i + 1, param[i]);
            }
        }
        int rows = ps.executeUpdate();
        return rows;
    }
}

import java.sql.ResultSet;

public class LanguagesBaseDao extends BaseDao {

    public void saveToDatabase(LanguagesBaseEntity entity) throws Exception {
        String sql = "insert into languages_material_base values("
                 + entity.getCid()
                 + ","
                 + "'" + entity.getTitle().replaceAll("'", "''") + "',"
                 + "'" + entity.getContent().replaceAll("'", "''") + "',"
                 + "sysdate(),"
                 + "sysdate()"
                 + ")";
        System.out.println(sql);
        executeUpdate(sql, null);
    }
    
    public Long getMaxCid() throws Exception {
        Long cid = null;
        String sql = "select max(cid) count from languages_material_base";
        ResultSet rs = executeQuery(sql, null);
        if(rs.next()) {
            cid = rs.getLong("count");
        }
        return cid;
    }
    
}

import java.sql.Date;

public class LanguagesBaseEntity {

    private long cid;
    
    private String title;
    
    private String content;
    
    private Date createTime;
    
    private Date udpateTime;

    public Long getCid() {
        return cid;
    }

    public void setCid(Long cid) {
        this.cid = cid;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    public Date getCreateTime() {
        return createTime;
    }

    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }

    public Date getUdpateTime() {
        return udpateTime;
    }

    public void setUdpateTime(Date udpateTime) {
        this.udpateTime = udpateTime;
    }
    
}

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

public class SaveTxtFileToDatabase {

    public static final String ROOT_PATH = "material/";
    
    public static LanguagesBaseDao languagesBaseDao = new LanguagesBaseDao();
    
    public static void main(String[] args) {
        String root = ROOT_PATH;
        readAllFilesAndSaveToDatabase(root);
    }

    public static void readAllFilesAndSaveToDatabase(String root) {
        try {
            File dir = new File(root);
            if(dir != null & amp; & amp; dir.isDirectory()) {
                File[] files = dir.listFiles();
                for(File file : files) {
                    if(file != null & amp; & amp; file.isFile()) {
                        Long cid = languagesBaseDao.getMaxCid();
                        if(cid == null) {
                            cid=1L;
                        } else {
                            cid + = 1;
                        }
                        LanguagesBaseEntity entity = readFile(file.getAbsolutePath());
                        entity.setCid(cid);
                        languagesBaseDao.saveToDatabase(entity);
                    }
                }
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
    
    public static void readFileAndSaveToDatabase(String filePath) {
        try {
            File file = new File(filePath);
            if(file != null & amp; & amp; file.isFile()) {
                Long cid = languagesBaseDao.getMaxCid();
                if(cid == null) {
                cid=1L;
                } else {
                cid + = 1;
                }
                LanguagesBaseEntity entity = readFile(file.getAbsolutePath());
                languagesBaseDao.saveToDatabase(entity);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
    
    public static LanguagesBaseEntity readFile(String filePath) {
        LanguagesBaseEntity entity = new LanguagesBaseEntity();
        try {
            String text = "";
            File file = new File(filePath);
            if(file != null & amp; & amp; file.isFile()) {
                entity.setTitle(file.getName());
                FileInputStream fis = new FileInputStream(file.getAbsolutePath());
                BufferedReader br = new BufferedReader(new InputStreamReader(fis, "utf-8"));
                String line = null;
                while((line = br.readLine()) != null) {
                    text + = line;
                }
                entity.setContent(text);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
        return entity;
    }
    
}