Java 如何为PreparedStatement动态赋值？

当前情景：

String query= "select emp_role from emp where emp_id = ?";
String query= "select address.phone_no from address, emp where address.address_id=emp.address_id and emp.emp_id = ?";

PreparedStatement prepatedStatement = connection.prepareStatement(query);
prepatedStatement.setInt(1, empId);
ResultSet rs = prepatedStatement.executeQuery();

预期情景：

String query= "select emp_role from emp where emp_id = ?";
String query= "select address.phone_no from address, emp where address.address_id=emp.address_id and emp.emp_id = ?";

PreparedStatement prepatedStatement = connection.prepareStatement(query);
prepatedStatement.setInt(1, empId);
ResultSet rs = prepatedStatement.executeQuery();

当我有多个输入的查询时，如下面提到的

String query= "select emp_role from emp where emp_id = ? and emp_plan = ?";
String query= "select emp_id,emp_name from (select emp_id,emp_name from emp_1 where emp_1_id = ?)union(select emp_id,emp_name from emp_2 where emp_2_id = ?)";

我需要一个通用的prepatedStatement逻辑来完成这项工作

看看-

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这个逻辑工作得很好，但我仍然需要设置显式映射的值

没有自动完成这些任务的方法，但您可以通过以下方式进行改进：

List<String> empParameters = getMeParameters();//may be factory here?
ResultSet rs = getResultSet(.....);
......
private ResultSet getResultSet(PreparedStatement prepatedStatement,   List<String> empParameters) {
     int i = 0;
     for (String empParameter : empParameters) {
         prepatedStatement.setInt(i++, empParameter);
     }
     return prepatedStatement.executeQuery();
}