java 项目中通过JDBC 实现sqlite数据库的增删改查操作

关于java项目中sqlite数据库的使用案例少之又少,查阅资料 最多只是怎么连接 并没有对对象的操作..实现对其数据的增删给查操作,为此,结合JDBC技术写的通过JDBC访问操作sqlite数据库.不喜勿喷!!!

转载请注明出处------------------Annhoa

 DBConnection.java

 

package com.darkblue.dynem.util.sqlitedb;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;

import com.darkblue.dynem.util.filehelp.FileBean;

/**
 * @author Annhoa
 * @date 2017/07/26
 * @since JDBC connection of sqlite 
 * @version 1.0
 * 
 */
public class DBConnection {

	private static final Logger log = Logger.getLogger(DBConnection.class.toString());
	private static Connection conn;
	private static Statement stat;
	private static PreparedStatement prep;
	private static ResultSet rst;
	/**
	 * 连接到数据库
	 * @param创建表sql
	 */
    public DBConnection(String jdbc,String sql){
        try {
            Class.forName("org.sqlite.JDBC");
            conn=DriverManager.getConnection(jdbc);
            stat=conn.createStatement();
            log.info("连接到Sqlite");
            //sql创建表语句
  	      	stat.executeUpdate(sql);
  	      	log.info("创建Sqlite表");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    /**
	 * 通用增删改
	 * */
	public static int executeUpdate(String sql,Object[] obs){
		try {
			prep=conn.prepareStatement(sql);
			if(obs!=null&&obs.length>0){
				for (int i = 0; i < obs.length; i++) {
					prep.setObject(i+1, obs[i]);
				}
			}
			
			int row=prep.executeUpdate();
			if(row>0){
			
			//	conn.commit(); //oracle数据库用到 	
				return row;
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return -1;
	}
    
	/**
	 * 通用查询
	 * */
	public static ResultSet executeQuery(String sql,Object[] obs){
		try {
			prep=conn.prepareStatement(sql);
			if(obs!=null&&obs.length>0){
				for (int i = 0; i < obs.length; i++) {
					prep.setObject(i+1, obs[i]);
				}
			}
			rst = prep.executeQuery();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return rst;
	}
    

}

 

 

FileBeanDBHelper.java

package com.darkblue.dynem.util.sqlitedb;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.darkblue.dynem.util.filehelp.FileBean;

public class FileBeanDBHelper {
private ResultSet rst=null;
private DBConnection sqliteHelper;

/**
 * @author Annhoa
 * @date 2017/07/26
 * @since fileBean数据库操作 
 * @version 1.0
 * 
 */
//关闭还未处理
public FileBeanDBHelper(){
	
	 String dbString ="jdbc:sqlite:test.db";
	 sqliteHelper = new DBConnection(dbString,"CREATE TABLE IF NOT EXISTS table0 "
    		+ "(id CHAR(20) PRIMARY KEY NOT NULL, filename CHAR(50) not null, "
    		+ "filesize LONG ,filepath CHAR(50), filesource CHAR(50))");
}

	public boolean save(FileBean fb) {
		String sql="insert into table0 values(?,?,?,?,?)";
		int row=DBConnection.executeUpdate(sql, new String[]{
			fb.getId(),
			fb.getFilename(),
			fb.getFilesize()+"",
			fb.getFilepath(),
			fb.getFilesource()
		});
		
		if(row>0){
			return true;
		}
		return false;
	}

	@SuppressWarnings("static-access")
	public boolean update(FileBean fb) {
		String sql="update table0 set id=?,filename=?,filesize=?,filepath=?,filesource=?";
		int row=sqliteHelper.executeUpdate(sql, new String[]{
				fb.getId(),
				fb.getFilename(),
				fb.getFilesize()+"",
				fb.getFilepath(),
				fb.getFilesource()
		});
		
		if(row>0){
			return true;
		}
		return false;
	}

	public boolean delById(String id) {
		String sql="delete from table0 where id=?";
		int row=sqliteHelper.executeUpdate(sql, new String[]{
				id
		});
		
		if(row>0){
			return true;
		}
		return false;
	}

	public FileBean findById(String id) {
		String sql="select * from table0 where id=?";
		rst=sqliteHelper.executeQuery(sql, new String[]{id});
		try {
			if(rst.next()){
				FileBean fb=new FileBean(rst.getString(1), rst.getString(2), rst.getLong(3), rst.getString(4), rst.getString(5));
				return fb;
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return null;
	}

	public List<FileBean> findAll(String filename) {
		String sql="select * from table0 where 1=1";
		
		if(filename!=null&&!filename.trim().equals("")){
			sql+="  and filename='"+filename+"'";
		}
		
		sql+=" order by id";
		rst=sqliteHelper.executeQuery(sql, null);
		List<FileBean> listfb=new ArrayList<FileBean>();
		try {
			while(rst.next()){
				FileBean fb=new FileBean(rst.getString(1), rst.getString(2), rst.getLong(3), rst.getString(4), rst.getString(5));
				listfb.add(fb);
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return listfb;
	}

	public static void main(String[] args) {
		FileBean fb=new FileBean();
		fb.setId("3");
    	fb.setFilename("xxxxx.txt");
    	fb.setFilepath("C:/Users/Administrator/Desktop");
    	fb.setFilesize(323);
    	fb.setFilesource("");
		boolean flag = new FileBeanDBHelper().save(fb);
		System.out.println(flag);
		List<FileBean> list = new FileBeanDBHelper().findAll(null);System.out.println(list);
	}

}

 

FileBean.java

package com.darkblue.dynem.util.filehelp;


import java.io.Serializable;

/**
 * 发送消息列表
 * Created by Administrator on 2016/8/12.
 */
public class FileBean implements Serializable {
    public String id;
    public long filesize;//文件大小
    public String filename;//文件名字
    public String filepath;//文件路径
    public String filesource;//文件分享源
    
    //添加构造方法
    public FileBean(String id,String filename,long filesize,String filepath,String filesource){
    	super();
    	this.id = id;
    	this.filename = filename;
    	this.filesize = filesize;
    	this.filepath = filepath;
    	this.filesource = filesource;
    }
    
    public String getFilesource() {
        return filesource;
    }
    public void setFilesource(String filesource) {
        this.filesource = filesource;
    }
    public long getFilesize() {
        return filesize;
    }
    public void setFilesize(long filesize) {
        this.filesize = filesize;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getFilename() {
        return filename;
    }

    public void setFilename(String filename) {
        this.filename = filename;
    }

    public String getFilepath() {
        return filepath;
    }

    public void setFilepath(String filepath) {
        this.filepath = filepath;
    }

    @Override
    public String toString() {
        return "FileBean{" +
                "id='" + id + '\'' +
                ", filesize=" + filesize +
                ", filename='" + filename + '\'' +
                ", filepath='" + filepath + '\'' +
                ", filesource='" + filesource + '\'' +
                '}';
    }

    public FileBean() {
    }


    public String toJsonString() {
        return "{\"id\":\"" + id + "\",\"filename\":\"" + filename + "\",\"filepath\":\"" + filepath + "\",\"filesize\":\"" + filesize + "\",\"filesource\":\"" + filesource + "\"}";
    }
}