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我正在尝试将 xls-parser 中的所有行添加到我的 sqlite 数据库中。它适用于表的前半部分，但其余未添加的所有行都会向我发送此错误：

10-22 20:43:32.453  17882-17882/? E/Database﹕ Error inserting null= diameter= category=Постное Меню price=180.0 weight=220.0 subcategory=Салаты name=Микс овощной composition=микс из листьев салата, черри, болгпрский перец, авокадо, кедроаые орешки, пармезан, зелень, ореховая заправка type=Уно Моменто url=http://epongorod.ru/images/stories/virtuemart/product/uno-miks-ovoshchnoj.jpg
android.database.sqlite.SQLiteException: near "null": syntax error: , while compiling: INSERT INTO menuTable(null, diameter, category, price, weight, subcategory, name, composition, type, url) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?);
        at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
        at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91)
        at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64)
        at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:80)
        at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:36)
        at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1145)
        at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1536)
        at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1410)
        at com.epon.MainActivity.MainActivity.onCreate(MainActivity.java:158)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
        at android.app.ActivityThread.access$2300(ActivityThread.java:125)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:123)
        at android.app.ActivityThread.main(ActivityThread.java:4627)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:521)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
        at dalvik.system.NativeStart.main(Native Method)

解析示例：

if (wb != null) {
        SQLiteDatabase db = dbHelper.getWritableDatabase();
        ContentValues cv = new ContentValues();
        Sheet sheet = wb.getSheetAt(0);

        for (int i = 1; i < sheet.getLastRowNum(); i++) {
            Row row = sheet.getRow(i);

            for (int cn=row.getFirstCellNum(); cn<row.getLastCellNum(); cn++) {
                Cell cell = row.getCell(cn, Row.CREATE_NULL_AS_BLANK);
                String result = cell.toString();

                String name = null;
                switch (cn) {
                    case 0:
                        name = "type";
                        break;
                    case 1:
                        name = "category";
                        break;
                    case 2:
                        name = "subcategory";
                        break;
                    case 3:
                        name = "name";
                        break;
                    case 4:
                        name = "composition";
                        break;

                    case 5:
                        name = "weight";
                        break;

                    case 6:
                        name = "diameter";
                        break;
                    case 7:
                        name = "price";
                        break;

                    case 8:
                        name = "url";
                        break;
                }
                cv.put(name, result);
            }

            db.insert("menuTable", null, cv);
        }

这是创建表的代码：

@Override
    public void onCreate(SQLiteDatabase db) {
        String query = "CREATE TABLE " + "menuTable" + " (" +
                "_id" + "INTEGER PRIMARY KEY AUTOINCREMENT, " +
                "type" + "TEXT," +
                "category" + "TEXT," +
                "subcategory" + "TEXT," +
                "name" + "TEXT," +
                "composition" + "TEXT," +
                "weight" + "TEXT," +
                "diameter" + "TEXT," +
                "price" + "TEXT," +
                "url" + "TEXT);";
        db.execSQL(query);
    }

所以，我只有半桌。

4

1 回答 1

2

例外是 Java 告诉您 SQLite 不会接受SQLite 关键字 null作为代码生成的 INSERT 语句中的列名的方式：

INSERT INTO menuTable(null, diameter, category, price, weight, subcategory, name, composition, type, url) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?);

仅凭您在此处共享的内容很难猜测，但也许像这样完成您的代码：

                case 8:
                    name = "url";
                    break;

                default:
                    //name = "_id";
                    break;
            }

            if(name != null && !name.isEmpty()) {
                cv.put(name, result);
            }

        }

        db.insert("menuTable", null, cv);
    }
}

会更完整地涵盖所有开关“可能性”和名称变量“未知数”吗？

于 2013-10-23T15:11:00.187 回答