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這篇文章主要介紹“JDBC 怎么直接訪問 mysql 數(shù)據(jù)庫”,在日常操作中,相信很多人在 JDBC 怎么直接訪問 mysql 數(shù)據(jù)庫問題上存在疑惑,丸趣 TV 小編查閱了各式資料,整理出簡單好用的操作方法,希望對大家解答”JDBC 怎么直接訪問 mysql 數(shù)據(jù)庫”的疑惑有所幫助!接下來,請跟著丸趣 TV 小編一起來學(xué)習(xí)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,關(guān)于“JDBC 怎么直接訪問 mysql 數(shù)據(jù)庫”的學(xué)習(xí)就結(jié)束了,希望能夠解決大家的疑惑。理論與實(shí)踐的搭配能更好的幫助大家學(xué)習(xí),快去試試吧!若想繼續(xù)學(xué)習(xí)更多相關(guān)知識,請繼續(xù)關(guān)注丸趣 TV 網(wǎng)站,丸趣 TV 小編會繼續(xù)努力為大家?guī)砀鄬?shí)用的文章!