Java连接MySql的详细介绍

　1.

　　现在工程(不是src)上右键--build path--add external archives,选择驱动下的那个jar包，这是release版本，bin目录下的是debug版本。

　　示例在docs下的connector-j.html，里面有例子（其中的test是数据库名，换位自己的）。

import java.sql.connection;
 import java.sql.drivermanager;
 import java.sql.sqlexception;
 connection conn = null;
 ...
 try {
     conn =
        drivermanager.getconnection("jdbc:mysql://localhost/test?" +
                                    "user=monty&password=greatsqldb");
     // do something with the connection
    ...
 } catch (sqlexception ex) {
     // handle any errors
     system.out.println("sqlexception: " + ex.getmessage());
     system.out.println("sqlstate: " + ex.getsqlstate());
     system.out.println("vendorerror: " + ex.geterrorcode());
 }

 　　2.可以直接在mysql控制台下创建数据库，也可以在通过执行 "\. 绝对路径名"。

　　“--”是注释符。

view code
 import java.sql.connection;
 import java.sql.drivermanager;
 import java.sql.resultset;
 import java.sql.sqlexception;
 import java.sql.statement;

 public class mysql {

     /**
      * @param args
      */
     public static void main(string[] args) {// 多个try合并到一块,然后使用source --- format
         // todo auto-generated method stub
         //若是用到finally则需要把声明放在try外边
         connection conn = null;
         statement stmt = null;
         resultset rs = null;

         try {
             class.forname("com.mysql.jdbc.driver");// 后面若是加上".newinstance"则还需要加上几个抛出异常
             conn = drivermanager.getconnection("jdbc:mysql://localhost/mydata?"
                     + "user=root&password=root");
             /*
              * java.sql.statement; 不是com.mysql这个包； 二者不可以同时存在
              */
             stmt = conn.createstatement();
             rs = stmt.executequery("select * from info");

             while (rs.next()) {
                 system.out.println(rs.getstring("name"));

             }

             // do something with the connection
         } catch (classnotfoundexception ex) {
             // handle any errors
             ex.printstacktrace();

         } catch (sqlexception ex) {
             // todo auto-generated catch block
             system.out.println("sqlexception: " + ex.getmessage());
             system.out.println("sqlstate: " + ex.getsqlstate());
             system.out.println("vendorerror: " + ex.geterrorcode());
         } finally {
             try {
                 if(null!= rs) {
                     rs.close();
                     rs = null;
                 }

                 if(null!= stmt) {
                     stmt.close();
                     stmt = null;
                 }

                 if(null!= conn) {
                     conn.close();
                     conn = null;
                 }

             } catch(sqlexception e) {
                 e.printstacktrace();
             }
         }

     }

 }