如何使用存储过程选择后获取主键值?

时间:2016-03-23 06:24:16

标签: java mysql stored-procedures jdbc

如何获取数据中现有主键ID的值?我试图选择一个数据,但它没有得到我当前表中的值。 当我尝试搜索现有记录时。它打印到文本字段。此外,当我搜索不存在的记录时,它仍然会打印到文本字段。我错过了什么吗?

非现有记录

enter image description here

表格

CREATE TABLE allsections_list
(
 SECTION_ID INT PRIMARY KEY AUTO_INCREMENT,
 SECTION_NAME INT VARCHAR(50)
)

已存储的程序

CREATE PROCEDURE getSECTION_NAME (IN SECTION_NAME VARCHAR(50))
SELECT SECTION_NAME FROM allsections_list

数据

enter image description here

CODE

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!

1 个答案:

答案 0 :(得分:0)

您的过程定义中只有一个IN参数。您可以使用OUT参数,在过程中设置它并在执行后选择它以获得结果,如下所示:mysql manual

在第一个例子中。