如何获取数据中现有主键ID的值?我试图选择一个数据,但是它没有在当前表中获取值。
当我尝试搜索现有记录时。它打印到文本字段。同样,当我搜索不存在的记录时,它仍会打印到文本字段。我错过了什么吗?
不存在的记录
表
CREATE TABLE allsections_list
(
SECTION_ID INT PRIMARY KEY AUTO_INCREMENT,
SECTION_NAME INT VARCHAR(50)
)
存储过程
CREATE PROCEDURE getSECTION_NAME (IN SECTION_NAME VARCHAR(50))
SELECT SECTION_NAME FROM allsections_list
数据
码
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
String searchSection = Section_SearchSection_Textfield.getText();
String searchSection_Name = Section_SectionName_TextField.getText();
int sectionId = 0;
if (searchSection.isEmpty())
{
JOptionPane.showMessageDialog(null, "Please fill up this fields");
}
else
try (Connection myConn = DBUtil.connect())
{
try (CallableStatement myFirstCs = myConn.prepareCall("{call getSECTION_NAME(?)}"))
{
myFirstCs.setString(1, searchSection);//Get value of Section_SearchSection_Textfield
myFirstCs.executeQuery();
try (ResultSet myRs = myFirstCs.executeQuery())
{
int resultsCounter = 0;
while (myRs.next())
{
String getSection_Name = myRs.getString(1);
sectionID = myRs.getInt("SECTION_ID");
Section_SectionName_TextField.setText(getSection_Name);//Set the value of text
Section_SectionName_TextField.setEnabled(true);//Set to enable
System.out.print(sectionID);
resultsCounter++;
}//end of while
}//end of resultset
}//end of callablestatement
}//end of connection
catch (SQLException e)
{
DBUtil.processException(e);
}
}
任何帮助或提示将不胜感激!谢谢!
最佳答案
您的过程定义中只有一个IN参数。您可以使用OUT参数,在过程中进行设置,然后在执行后选择SELECT以获取结果,例如:mysql manual
在第一个示例中。