需要根据自己的设置staticfinalStringUSER="root";staticfinalStringPASS="123456";publicstaticvoidmain(String[]args){Connectionconn=null;Statementstmt=null;try{//注册 JDBC 驱动Class.forName(JDBC_DRIVER);//打开链接System.out.p
// 加载JDBC驱动程序:反射,这样调用初始化com.mysql.jdbc.Driver类,即将该类加载到JVM方法区,并执行该类的静态方法块、静态属性。 Class.forName("com.mysql.jdbc.Driver");// 创建数据库连接Connection connection=DriverManager.getConnection("jdbc:mysql://localhost:3306/test?user=root&password=root&useUnicode=...
8 import java.sql.SQLException; 9 import java.sql.Statement; 10 public class jdbc { //定义一个类 11 public static void main(String[] args){ //主方法 12 try{ 13 String driver="com.mysql.jdbc.Driver"; //1.定义驱动程序名为driver内容为com.mysql.jdbc.Driver 14 String url="jdbc:mysql:/...
6.5 Java, JDBC, and MySQL Types MySQL Connector/J is flexible in the way it handles conversions between MySQL data types and Java data types. In general, any MySQL data type can be converted to a java.lang.String, and any numeric type can be converted to any of the Java numeric types...
1、在MySQL Workbench创建数据库db1,创建表test1 2、注册驱动。如果忘了驱动名,可以在libs -> mysql-connector-java.jar -> jdbc -> Driver 里面查看 Class.forName("com.mysql.cj.jdbc.Driver"); 3、获取连接 Connection com = DriverManager.getConnection("jdbc:mysql://localhost:3306/db1", "root", "...
public class DBConnectionDemo { public static void main(String[] args) { // JDBC连接URL String url = "jdbc:mysql://localhost:3306/mydatabase"; String username = "root"; String password = "password"; try { // 创建数据库连接 Connection connection = DriverManager.getConnection(url, username,...
{// JDBC连接URLString url="jdbc:mysql://localhost:3306/mydatabase";String username="root";String password="password";try{// 创建数据库连接Connection connection=DriverManager.getConnection(url,username,password);// 在此处执行数据库操作// 关闭连接connection.close();}catch(SQLException e){e.print...
public class ConnectionTest{// 方式一 @Test public void testConnection1() throws SQLException{ // 鼠标放在Driver,按Ctrl+T可查看对应的实现类 // 获取driver的实现类对象 Driver driver = new com.mysql.jdbc.Driver(); // 若使用的是mysql80后面需要加上时间戳 ?serverTimezone=UTC&characterEncoding=...
java—用jdbc和mysql解决“通信链路故障”就我而言，在上更改远程计算机mysql配置/etc/mysql/my.cnf：...
Mapping MySQL Error Numbers to JDBC SQLState Codes JDBC Concepts Connection Pooling with Connector/J Multi-Host Connections Using the X DevAPI with Connector/J: Special Topics Using the Connector/J Interceptor Classes Using Logging Frameworks with SLF4J Using Connector/J with Tomcat Using...