这个报错明显是连接数据库的url没有写对,但是,我要说的是但是,同样的代码生产没有问题,而测试环境报错了。最终哥找到那个错误,jdbc连接数据库时,有ResultSet,PreparedStatement,Connection,结果代码里面只关掉了后面两个,ResultSet没有关掉,按理说只需关掉Connection就可以全部关掉的。不管怎样,这个事实就是,我把ResultS...
具体代码如下所示：import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;public class BASEUtils {private static String DBDRIVERURL = "com.mysql.jdbc.Driver";private static String DBURL = "jdbc:mysql://localhost:3306/test";private static ...
1.jdbc连接数据库,就这样子 Class.forName("com.mysql.jdbc.Driver"); java.sql.Connection conn = DriverManager.getConnection(jdbcUrl); 2.通过传入jdbc url用Drivermanager.getConnection(jdbcurl)连接数据库, 注意:一次Drivermanager.getConnection(jdbcurl)获得只是一个connection,并不能满足高并发情况。因为connection...
jdbc:sqlserver://(Required) - Is known as the subprotocol and is constant. serverName(Optional) - Is the address of the server to connect to. This address can be a DNS or IP address, or it can belocalhostor127.0.0.1for the local computer. If not specified in the connection URL, the...
Thehostspart is written in the format ofhost:port. This is an example of a simple single-host connection URL: jdbc:mysql://host1:33060/sakila hostcan be an IPv4 or an IPv6 host name string, and in the latter case it must be put inside square brackets, for example“[1000:2000::abcd...
importjava.sql.Connection;importjava.sql.DriverManager;importjava.sql.ResultSet;importjava.sql.SQLException;importjava.sql.Statement;publicclassConnectURL{publicstaticvoidmain(String[] args){// Create a variable for the connection string.String connectionUrl ="jdbc:sqlserver://<server>:<port>;encrypt=...
<connection-url>jdbc:oracle:thin:@MyServerName:1521/IGDB</connection-url> <driver-class>oracle.jdbc.OracleDriver</driver-class> <user-name>WPDS</user-name> <password>system</password> b) if do you see something like this : 06:59:57,887 WARN [org.hibernate.cfg.SettingsFactory] (main)...
jdbc.databaseurl=jdbc:mysql://localhost:3306/test I want to try to put the JAVA program on another computer. I changed the db connection url by using the computer (with MySQL 5.5) name like the following, but the JAVA program got the “Connection refused” exception. ...
初学JDBC的时候,每个同学首先都会接触以下的代码,步骤很简单,就是先注册相应数据库的JDBC Driver,然后通过JDBC DriverManager获取数据库连接,之后从连接中执行SQ语句。 Class.forName("com.mysql.jdbc.Driver");Connectionconn=DriverManager.getConnection(DB_URL,USER,PASS);Statementstmt=conn.createStatement();Stringsql...
下载JDBC 驱动程序 无论最新连接尝试成功还是失败,都获取该尝试的连接 ID。 语法 public Java.util.UUID SQLServerConnection.getClientConnectionID(); 返回值 表示最新连接尝试的连接 ID 的 16 字节的 GUID。 或者为 NULL(如果在启动连接请求和预登录握手后失败)。