如何在JDBC中調用存儲過程

Question

對於家庭作業，我必須創建一個pl / sql存儲過程來將一個facutly成員添加到數據庫

CREATE OR REPLACE PROCEDURE ADDFACULTYDEPTSAL
  (facid IN NUMBER,
  facname IN VARCHAR,
  depID IN NUMBER)
AS
  sal NUMBER;
BEGIN
  CALCSALDEPT(depID, sal);
  IF sal >= 50000
  THEN 
    sal := sal*.9;
  ELSE
    IF sal >= 30000
    THEN
      sal := sal*.8;
    END IF;
  END IF;

  INSERT INTO FACULTY(fid, fname, deptid, salary)
  VALUES(facid, facname, depID, sal);
END ADDFACULTYDEPTSAL;

完成后，我需要為所述程序進行java調用，我已經厭倦了：

Statement stmt = dbConnection.createStatement();
String in;
if(a == 1){
    in = "ADDFACULTYDEPTSAL("
        + fid.getText() + "','"
        + fname.getText() + "','"
        + did.getText() + "')";
} else {
    in = "ADDFACULTYUNISAL("
        + fid.getText() + "','"
        + fname.getText() + "','"
        + did.getText() + "')";
}
stmt.executeQuery(in);

我在上面的try catch塊中繼續拋出錯誤。 我根據我在其他網站上看到的字符串在“in”中嘗試了幾個變體：in =“{call ADDFACULTYDEPSAL ... in =”call ADDFACULTYDEPSAL ...

看這里： MySQL連接器指南我也嘗試將stmt更改為可調用語句：

CallableStatement stmt;
if(a == 1){
    stmt = dbConnection.prepareCall("{call ADDFACULTYDEPTSAL(?,?,?)}");
} else {
    stmt = dbConnection.prepareCall("{call ADDFACULTYUNISAL(?,?,?)}");
}

但是，嘗試這種方式似乎不起作用，因為我需要將兩個以上的變量傳遞給過程。

誰能告訴我我做錯了什么？

Answer 1

你幾乎在那里：

String call = (a == 1 ? "{call ADDFACULTYDEPTSAL(?,?,?)}"
                      : "{call ADDFACULTYUNISAL(?,?,?)}");
try (CallableStatement stmt = dbConnection.prepareCall(call)) {
    stmt.setInt(1, Integer.parseInt(fid.getText()));
    stmt.setString(2, fname.getText());
    stmt.setInt(3, Integer.parseInt(did.getText()));
    stmt.execute();
}