Java join SQL命令未正确结束
我对join语句有问题Java join SQL命令未正确结束,java,javascript,sql,command,spring-jdbc,Java,Javascript,Sql,Command,Spring Jdbc,我对join语句有问题 String q1="select e.employee_id,e.manager_id,e.first_name,e.last_name,e.salary,e.commission_pct,d.manager_id,d.employee_id from employees as e ,employees as d where e.manager_id=d.employee_id and e.employee_id="+jComboBox1.getSelectedIt
String q1="select e.employee_id,e.manager_id,e.first_name,e.last_name,e.salary,e.commission_pct,d.manager_id,d.employee_id from employees as e ,employees as d where e.manager_id=d.employee_id and e.employee_id="+jComboBox1.getSelectedItem();
try{
OracleDataSource ods=new OracleDataSource();
ods.setURL("jdbc:oracle:thin:hr/hr@localhost:1521/XE");
Connection con=ods.getConnection();
Statement s=con.createStatement();
s.execute(q1);
ResultSet rs=s.getResultSet();
String x=(String)jComboBox1.getSelectedItem();
while(rs.next()){
if (x.equals(rs.getString("e.employee_id"))){
jTextField1.setText(rs.getString("e.first_name"));
jTextField2.setText(rs.getString("e.last_name"));
jTextField3.setText(rs.getString("e.salary"));
jTextField4.setText(rs.getString("e.commission_pct"));
jTextField5.setText(rs.getString("d.first_name"));
}
}
con.close();
}catch(Exception e){e.printStackTrace();}
我怎样才能解决这个问题?!
您确实应该使用prepared语句来避免SQL注入问题。无论如何,你的问题是:
select e.employee_id,e.manager_id,e.first_name,e.last_name,e.salary,e.commission_pct,d.manager_id,d.employee_id
from employees as e ,employees as d
where e.manager_id=d.employee_id
and e.employee_id="+jComboBox1.getSelectedItem();
我看到您使用rs.getString作为员工id,因此where子句中缺少e.employee_id字段的引号。到底是什么问题?员工id的类型是什么?很好。坐下来放松。很快就会有人对你的服务器进行pwn,使你的问题变得毫无意义。如果你遇到异常,你能发布堆栈跟踪吗?