简单的连接语句：
try{ Class.forName("org.gjt.mm.mysql.Driver"); Connection conn=DriverManager.getConnection("jdbc:mysql://localhost/test","root","zqy01"); /* 注：test为数据库名称，root为用户名，zqy01为密码 */ Statement stmt=conn.createStatement(); String sql="select * from users where username='"+username+"'"; sql+="and password='"+password+"'"; ResultSet rs=stmt.executeQuery(sql); if(rs.next()){ ........./*这部分省略了*/ }
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