java - 插入查询 - executeUpdate 返回 -1

Question

我正在尝试使用 jdbc conn(在 Java 中)将记录插入 SQL Server。 如果我手动将查询语句复制到 java 文件中，我就可以插入到 SQL 中。但是它不是从代码中插入的？

请帮忙，我哪里犯错了？

           PreparedStatement preparedStatement = null;

        if (conn != null) {                 
            System.out.println("Connection Successful!");             
        } 

        //Create a Statement object
        Statement sql_stmt = conn.createStatement();

         //Create a Statement object
        Statement sql_stmt_1 = conn.createStatement();

        //Result Set for Prouduct Table
        ResultSet rs  = sql_stmt.executeQuery("SELECT MAX(ID), MAX(RG_ID), MAX(WG_ID) FROM " + strDBName + ".[dbo].Product");

        if ( rs.next() ) {     
            // Retrieve the auto generated key(s).     
            intID = rs.getInt(1); 
            intRG_ID = rs.getInt(2); 
            intWG_ID = rs.getInt(3); 
        }

        for (int iCount = 0 ;iCount < arrListLevel_1_Unique.size(); iCount++)
        {

         //Result Set for Prouduct Table


        sql_stmt_1.executeUpdate("\n IF NOT EXISTS(SELECT 1 FROM " + strDBName + ".[dbo].Product WHERE [Name] NOT LIKE '" + arrListLevel_1_Unique.get(iCount) + "') "
                + "\nINSERT INTO " + strDBName + ".[dbo].Product ([Name] ,"
                + "[RG_ID],[WG_ID],[Parent_Product]) "
                + "VALUES ( '" + arrListLevel_1_Unique.get(iCount) + "',"
                + + (intWG_ID + intRowIncrement) + ", " + (intWG_ID + intRowIncrement + 1) + ", 5828)");


        intRowIncrement++ ;
        }

    rs.close();
        sql_stmt.close();
        sql_stmt_1.close();


        //Close the database connection
        conn.close();

Answer 1

第五行有两个加号+:

+ + (intWG_ID + intRowIncrement) + ...

---

否则，问题可能出在IF ... 语句上。您可以试试这个:

    sql_stmt_1.executeUpdate(
        " INSERT INTO " + strDBName + ".[dbo].Product ([Name] ,"
      + "[RG_ID],[WG_ID],[Parent_Product]) "
      + " SELECT '" + arrListLevel_1_Unique.get(iCount) + "',"
      + (intWG_ID + intRowIncrement) + ", "
      + (intWG_ID + intRowIncrement + 1) + ", 5828 "
      + " WHERE NOT EXISTS( SELECT 1 FROM " + strDBName
      + ".[dbo].Product WHERE [Name] LIKE '"
      + arrListLevel_1_Unique.get(iCount) + "') "
    ) ;