String mysql="select name,password from emp where name=? and password=?";
PreparedStatement stmt=conn.prepareStatement(mysql);
stmt.setString(1,"tom");
stmt.setString(2,"1234");
ResultSet rs=stmt.getResultSet();
rs.next();
System.out.println(rs.getString(1));
数据库里是 name=‘tom’,password=‘1234’
怎么包空指针啊?求指点
PreparedStatement stmt=conn.prepareStatement(mysql);
stmt.setString(1,"tom");
stmt.setString(2,"1234");
ResultSet rs=stmt.getResultSet();
rs.next();
System.out.println(rs.getString(1));
数据库里是 name=‘tom’,password=‘1234’
怎么包空指针啊?求指点
解决方案 »
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