JDBC怎么直接访问mysql数据库
这篇文章主要介绍"JDBC怎么直接访问mysql数据库"，在日常操作中，相信很多人在JDBC怎么直接访问mysql数据库问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"JDBC怎么直接访问mysql数据库"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
import com.mysql.jdbc.Driver;
import java.sql.Connection;
import java.sql.Statement;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.io.*;
import java.sql.*;
public class Database {
privateConnection connection = null;
public boolean Init( String url, String userName, String password) throws Exception
{
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection(url, userName, password);
return true;
}
public void Test() throws Exception
{
Statement st = connection.createStatement();
//Insert
//st.execute("Insert into setup values ( '13', '22') ");
//Test Blob field
//Write Test
File file1 = new File("Database.java");
int len1 = (int) file1.length();
InputStream fis1 = new java.io.FileInputStream(file1);
PreparedStatement ps = connection.prepareStatement("INSERT INTO setup VALUES (?, ?,?)");
ps.setString(1, "250");
ps.setString(2, "250ddd");
ps.setAsciiStream(3, fis1, len1);
ps.execute();
ResultSet r = st.executeQuery("select * from setup");
if( r!= null )
{
ResultSetMetaData m = r.getMetaData();
while( r.next())
{
for( int i = 1; i<= m.getColumnCount(); i++ )
{
System.out.println( m.getColumnLabel(i) + "=" + r.getObject(i).toString() );
}
java.sql.Blob ablob = r.getBlob(3);
System.out.println( r.getString(1) + " " +r.getString(2) + " " + ablob.length());
InputStream bis = ablob.getBinaryStream() ;
OutputStream os = new FileOutputStream("test.java");
int b = bis.read();
while (b != -1 ) {
System.out.print((char)b);
os.write((char)b);
b = bis.read();
}
os.flush();
os.close();
bis.close();
}
}
else
{
System.out.println("The table is empty.");
}
//Read Test
}
public static void main( String []args)
{
Database db = new Database();
try
{
db.Init("jdbc:mysql://localhost:3306/jivejdon?useUnicode=true&characterEncoding=gbk", "root", "root");
db.Test();
}
catch ( Exception e )
{
e.printStackTrace();
}
}
}
到此，关于"JDBC怎么直接访问mysql数据库"的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注网站，小编会继续努力为大家带来更多实用的文章！
