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Java操作SQLite数据库

你带来了我的快乐 2022-02-28 阅读 52


sqlite-jdbc 仓库地址:

https://bitbucket.org/xerial/sqlite-jdbc

sqlite-jdbc.jar

1、下载地址

https://bitbucket.org/xerial/sqlite-jdbc/downloads/

2、示例代码

package com.mouday;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;


public class App
{
public static void main( String[] args ) throws ClassNotFoundException, SQLException {
Class.forName("org.sqlite.JDBC");
Connection connection = DriverManager.getConnection("jdbc:sqlite:test.db");
System.out.println( "Hello World!" );
}
}

3、运行测试

javac com.mouday.App

# Mac or Linux
java -classpath ".:sqlite-jdbc-3.7.2.jar" com.mouday.App

# Windows
java -classpath ".;sqlite-jdbc-3.7.2.jar" com.mouday.App

使用Maven

依赖

<dependencies>
<dependency>
<groupId>org.xerial</groupId>
<artifactId>sqlite-jdbc</artifactId>
<version>3.7.2</version>
</dependency>
</dependencies>

SQLite的存储类


  1. NULL
  2. INTEGER 带符号的整数
  3. REAL 浮点值
  4. TEXT 文本字符串
  5. BLOB

定义数据结构

package com.mouday;

public class Person {
private int id;
private String name;

public Person(int id, String name) {
this.id = id;
this.name = name;
}

public int getId() {
return id;
}

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

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}
}

CURD

package com.mouday;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;

public class App {
public static void main(String[] args) throws ClassNotFoundException {
// 加载驱动
Class.forName("org.sqlite.JDBC");

Connection connection = null;
try {

// 获取连接
connection = DriverManager.getConnection("jdbc:sqlite:test.db");

Statement statement = connection.createStatement();

// 建表
statement.executeUpdate("drop table if exists person");
statement.executeUpdate("create table person (id integer , name text)");

// 插入数据
statement.executeUpdate("insert into person(id, name) values(1, '刘备')");
statement.executeUpdate("insert into person(id, name) values(2, '关羽')");
statement.executeUpdate("insert into person(id, name) values(3, '张飞')");

// 更新数据
statement.executeUpdate("update person set name='诸葛亮' where id = 2");

// 删除数据
statement.executeUpdate("delete from person where id = 3");


// 批处理
String sql = "insert into person(id, name) values(?, ?)";
PreparedStatement preparedStatement = connection.prepareStatement(sql);

List<Person> list = new ArrayList<>();
list.add(new Person(4, "Tom"));
list.add(new Person(5, "曹操"));
list.add(new Person(6, "刘备"));

for(Person person: list){
preparedStatement.setInt(1, person.getId());
preparedStatement.setString(2, person.getName());
preparedStatement.addBatch();
}

preparedStatement.executeBatch();
preparedStatement.close();

// 查询数据
ResultSet resultSet = statement.executeQuery("select * from person");
while (resultSet.next()){
System.out.println(resultSet.getInt("id"));
System.out.println(resultSet.getString("name"));
}

statement.close();

} catch (SQLException e) {
e.printStackTrace();
} finally {
try{
if( connection != null){
connection.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}



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