使用java存储过程错误处理

Question

如何在编写存储过程或从java访问存储过程时处理错误条件？

Answer 1

如果某些操作失败，存储过程应返回错误代码，但如果存储过程本身失败，则只能选择捕获SQLException。

Answer 2

try { 
    CallableStatement stmt=con.prepareCall("{call insertR(?,?)}"); 
    stmt.setInt(1,1011); 
    stmt.setString(2,"Amit"); 
    stmt.execute(); 
} catch(SQLException e) { 
    e.printStack(); 
} 

Answer 3

this piece of code is taken from oracle [docs][1] to answer. 

public void 
    createProcedureShowSuppliers() 
    throws SQLException { 
    String createProcedure = null; 

    String queryDrop = 
     "DROP PROCEDURE IF EXISTS SHOW_SUPPLIERS"; 

    createProcedure = 
     "create procedure SHOW_SUPPLIERS() " + 
     "begin " + 
      "select SUPPLIERS.SUP_NAME, " + 
      "COFFEES.COF_NAME " + 
      "from SUPPLIERS, COFFEES " + 
      "where SUPPLIERS.SUP_ID = " + 
      "COFFEES.SUP_ID " + 
      "order by SUP_NAME; " + 
     "end"; 
    Statement stmt = null; 
    Statement stmtDrop = null; 

    try { 
     System.out.println("Calling DROP PROCEDURE"); 
     stmtDrop = con.createStatement(); 
     stmtDrop.execute(queryDrop); 
    } catch (SQLException e) { 
     JDBCTutorialUtilities.printSQLException(e); 
    } finally { 
     if (stmtDrop != null) 
     { 
      stmtDrop.close(); 
     } 
    } 

    try { 
     stmt = con.createStatement(); 
     stmt.executeUpdate(createProcedure); 
    } catch (SQLException e) { 
     JDBCTutorialUtilities.printSQLException(e); 
    } finally { 
     if (stmt != null) { stmt.close(); } 
    } 
} 


    [1]: https://docs.oracle.com/javase/tutorial/jdbc/basics/storedprocedures.html