我的环境:MySQL:mysql-essential-5.1.51-win32
安装之前的准备工作:
jdbc驱动
Eclipse:任意版本,免费的,可以百度的到。
1.MySQL安装
下面来创建一个数据:
mysql>CREATE DATABASE test; //创建一个数据库 mysql>use test; //指定test为当前要操作的数据库 mysql>CREATE TABLE user (name VARCHAR(20),password VARCHAR(20)); //创建一个表user,设置两个字段。 mysql>INSERT INTO user VALUES('huzhiheng','123456'); //插入一条数据到表中
2.打开Eclipse,创建一个项目(my),
操作:右键点击my--->build Path--->add external Archiver...选择jdbc驱动,点击确定。
我的项目列表:
3.驱动已经导入,下面我们来写一个程序验证一下
import java.sql.*; public class MysqlJdbc { public static void main(String args[]) { try { Class.forName("com.mysql.jdbc.Driver"); //加载MYSQL JDBC驱动程序 //Class.forName("org.gjt.mm.mysql.Driver"); System.out.println("Success loading Mysql Driver!"); } catch (Exception e) { System.out.print("Error loading Mysql Driver!"); e.printStackTrace(); } try { Connection connect = DriverManager.getConnection( "jdbc:mysql://localhost:3306/test","root","198876"); //连接URL为 jdbc:mysql//服务器地址/数据库名 ,后面的2个参数分别是登陆用户名和密码 System.out.println("Success connect Mysql server!"); Statement stmt = connect.createStatement(); ResultSet rs = stmt.executeQuery("select * from user"); //user 为你表的名称 while (rs.next()) { System.out.println(rs.getString("name")); } } catch (Exception e) { System.out.print("get data error!"); e.printStackTrace(); } } }
点击运行程序:
Success loading Mysql Driver! Success connect Mysql server!
出现上面结果,说明你连接数据库成功。
4.可以查看到MySQL里面的内容,那我们是不是想往MySQL中插入数据呢。
下面的例子,往MySQL的user表中插入100条数据
import java.sql.*; public class Myjproject { public static void main(String args[]) { try { Class.forName("com.mysql.jdbc.Driver"); //加载MYSQL JDBC驱动程序 //Class.forName("org.gjt.mm.mysql.Driver"); System.out.println("Success loading Mysql Driver!"); } catch (Exception e) { System.out.print("Error loading Mysql Driver!"); e.printStackTrace(); } try { Connection connect = DriverManager.getConnection( "jdbc:mysql://localhost:3306/test","root","198876"); int num=100; PreparedStatement Statement=connect.prepareStatement("INSERT INTO user VALUES(?,?)"); for(int i=0;i<num;i++) //定义个100次的循环,往表里插入一百条信息。 { Statement.setString(1,"chongshi"+i); Statement.setString(2,"bo"+i); Statement.executeUpdate(); } // } catch (ClassNotFoundException e) { // TODO Auto-generated catch block // System.out.println("An error has occurred:"+e.toString()); // e.printStackTrace(); }catch(SQLException e) { } } }
5.下面我们打开MySQL数据库进行查看
mysql> show tatabases; //查看所数据库 mysql> use test; //使test为当前要操作的数据库 mysql> show tables; //查看当前数据库的所有表 view sourceprint? mysql> select *from user; //查看当前表(user)的所有信息
注意:如果不能正常连接你的数据库,请检查你代码中,驱动、用户名、密码、表等信息是否对应无误,不要把别人的代码直接复制过来,看也不看就用。
以上就是用Eclipse连接MySQL数据库的全部过程,希望对大家的学习有所帮助。

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MySQL is suitable for small and large enterprises. 1) Small businesses can use MySQL for basic data management, such as storing customer information. 2) Large enterprises can use MySQL to process massive data and complex business logic to optimize query performance and transaction processing.

InnoDB effectively prevents phantom reading through Next-KeyLocking mechanism. 1) Next-KeyLocking combines row lock and gap lock to lock records and their gaps to prevent new records from being inserted. 2) In practical applications, by optimizing query and adjusting isolation levels, lock competition can be reduced and concurrency performance can be improved.

MySQL is not a programming language, but its query language SQL has the characteristics of a programming language: 1. SQL supports conditional judgment, loops and variable operations; 2. Through stored procedures, triggers and functions, users can perform complex logical operations in the database.

MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

MySQL is an open source relational database management system suitable for data storage, management, query and security. 1. It supports a variety of operating systems and is widely used in Web applications and other fields. 2. Through the client-server architecture and different storage engines, MySQL processes data efficiently. 3. Basic usage includes creating databases and tables, inserting, querying and updating data. 4. Advanced usage involves complex queries and stored procedures. 5. Common errors can be debugged through the EXPLAIN statement. 6. Performance optimization includes the rational use of indexes and optimized query statements.

MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.

InnoDB's lock mechanisms include shared locks, exclusive locks, intention locks, record locks, gap locks and next key locks. 1. Shared lock allows transactions to read data without preventing other transactions from reading. 2. Exclusive lock prevents other transactions from reading and modifying data. 3. Intention lock optimizes lock efficiency. 4. Record lock lock index record. 5. Gap lock locks index recording gap. 6. The next key lock is a combination of record lock and gap lock to ensure data consistency.


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