SQLITE_ERROR SQL錯誤或數據庫丟失（“聲明”附近：語法錯誤）

Question

我正在嘗試通過使用准備好的語句來應用注入攻擊預防。 設置代碼的方式是，我有一個DBManager類，它通過存儲負責執行sqlite語句的java方法來充當Java和sqlite之間的催化劑。 然后，我有了表類，它們自己存儲sqlite語句。 基本上，我想存儲一個執行INSERT語句的准備好的語句，並在調用open（）方法時與其建立連接。 這是有問題的兩個類的摘錄，我在其中試圖為IncomeStatementTable類中存儲的常量創建准備好的表調：

package com.anniemals.database;

//the database package is meant to be the API package which
// takes all queried values from a database and sets them to values
// in each respective class

//MAKE SURE TO ADD METHODS TO ACCESS DB METADATA, FUNCTIONS, AND VIEWS LATER!
import com.anniemals.clients.ClientInfoIncomeStatement;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;

public class DBManager {

    public static final String DB_NAME = "clients.db";
    public static final String DB_PATH = "jdbc:sqlite:C:/Users/Steven/Documents/ProjectAnnieMalsRemote/Databases/" + DB_NAME;

    //SortOrders for queries
    public static final int ORDER_BY_NONE = 1;
    public static final int ORDER_BY_ASC = 2;
    public static final int ORDER_BY_DESC = 3;

    //Sets a connection to access and utilize sqlite expressions, which are assigned to the PreparedStatement variables for later use
    private Connection conn;

//Inserts
    private PreparedStatement insertIntoIncomeStatementPStatement;
//Composition has-a relationships for Table Classes
    private ClientInfoTable clientInfoTable;
    private IncomeStatementTable incomeStatementTable;

    public DBManager() {
        //Composition has-a relationships for Table Classes
        this.clientInfoTable = new ClientInfoTable();
        this.incomeStatementTable = new IncomeStatementTable();
    }

    public static DBManager getInstance() {
        return instance;
    }

    //Open and Close DB methods

    public boolean open(){
        try{
            conn = DriverManager.getConnection(DB_PATH);
//STATEMENT WHICH CAUSED THE ERROR!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
            insertIntoIncomeStatementPStatement = conn.prepareStatement(incomeStatementTable.getInsertIncomeStatement());
            System.out.println("Database Opened");
            return true;
        } catch (SQLException e){
            System.out.println("Couldn't connect to database: " + e.getMessage());
            e.printStackTrace();
            return false;
        }
    }

    public void close(){
        try {
            if (insertIntoIncomeStatementPStatement != null){
                insertIntoIncomeStatementPStatement.close();
            }
            if(insertIntoClientInfoPStatement != null){
                insertIntoClientInfoPStatement.close();
            }
            if (conn != null){
                conn.close();
                System.out.println("Database closed");
            }
        } catch (SQLException e){
            System.out.println("Couldn't close connection: " + e.getMessage());
        }
    }


public class IncomeStatementTable {

    //Column Labels
    public static final String TABLE_INCOME = "Income Statements";
    public static final String COLUMN_INCOME_ID = "_id";
    public static final String COLUMN_CLIENT_ID = "Client ID";
    public static final String COLUMN_INCOME_DATE = "Date";
    public static final String COLUMN_INCOME_TOTAL_OPER_EXPENSES = "Total Operating Expenses";
    public static final String COLUMN_INCOME_GROSS_PROFIT = "Gross Profit";
    public static final String COLUMN_INCOME_AMORTIZATION = "Amortization";
    public static final String COLUMN_INCOME_EBITDA = "E.B.I.T.D.A.";
    public static final String COLUMN_INCOME_PROFIT_BEFORE_TAX = "Profit Before Tax";
    public static final String COLUMN_INCOME_TAX = "Tax";
    public static final String COLUMN_INCOME_NET_PROFIT = "Net Profit";
    public static final String COLUMN_INCOME_EARN_PER_SHARE = "Earnings Per Share";

    //Column Indexes
    public static final int INDEX_INCOME_ID = 1;
    public static final int INDEX_INCOME_CLIENT_ID = 2;
    public static final int INDEX_INCOME_DATE = 3;
    public static final int INDEX_INCOME_TOTAL_OPER_EXPENSES = 4;
    public static final int INDEX_INCOME_GROSS_PROFIT = 5;
    public static final int INDEX_INCOME_AMORTIZATION = 6;
    public static final int INDEX_INCOME_EBITDA = 7;
    public static final int INDEX_INCOME_PROFIT_BEFORE_TAX = 8;
    public static final int INDEX_INCOME_TAX = 9;
    public static final int INDEX_INCOME_NET_PROFIT = 10;
    public static final int INDEX_INCOME_EARN_PER_SHARE = 11;

public static final String INSERT_INCOME_STATEMENT = "INSERT INTO " + TABLE_INCOME + "(" + COLUMN_INCOME_ID +
            ", " + COLUMN_CLIENT_ID +  ", " + COLUMN_INCOME_DATE  + ", " + COLUMN_INCOME_TOTAL_OPER_EXPENSES
            + ", " + COLUMN_INCOME_GROSS_PROFIT  + ", " + COLUMN_INCOME_AMORTIZATION  + ", " + COLUMN_INCOME_EBITDA
            + ", " + COLUMN_INCOME_PROFIT_BEFORE_TAX  + ", " + COLUMN_INCOME_TAX  + ", " + COLUMN_INCOME_NET_PROFIT
            + ", " + COLUMN_INCOME_EARN_PER_SHARE + ") VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";

    public static String getInsertIncomeStatement() {
        return INSERT_INCOME_STATEMENT;
    }

我知道它與open（）方法中的變量賦值語句有關，因為當我注釋掉它時，程序運行良好，並且可以連接到數據庫。 我試圖從其他與我的問題類似的問題中尋找答案，但是我對sqlite語句本身的語法所做的任何更改仍然使我面臨相同的錯誤。 我嘗試跟蹤線程堆棧，以查看錯誤中“聲明”所指的內容，但我仍不確定。 有人可以幫助我進一步指出問題所在嗎？

這是跟蹤堆棧：

org.sqlite.SQLiteException: [SQLITE_ERROR] SQL error or missing database (near "Statements": syntax error)
    at sqlite.jdbc@3.23.1/org.sqlite.core.DB.newSQLException(DB.java:909)
    at sqlite.jdbc@3.23.1/org.sqlite.core.DB.newSQLException(DB.java:921)
    at sqlite.jdbc@3.23.1/org.sqlite.core.DB.throwex(DB.java:886)
    at sqlite.jdbc@3.23.1/org.sqlite.core.NativeDB.prepare_utf8(Native Method)
    at sqlite.jdbc@3.23.1/org.sqlite.core.NativeDB.prepare(NativeDB.java:127)
    at sqlite.jdbc@3.23.1/org.sqlite.core.DB.prepare(DB.java:227)
    at sqlite.jdbc@3.23.1/org.sqlite.core.CorePreparedStatement.<init>(CorePreparedStatement.java:45)
    at sqlite.jdbc@3.23.1/org.sqlite.jdbc3.JDBC3PreparedStatement.<init>(JDBC3PreparedStatement.java:30)
    at sqlite.jdbc@3.23.1/org.sqlite.jdbc4.JDBC4PreparedStatement.<init>(JDBC4PreparedStatement.java:19)
    at sqlite.jdbc@3.23.1/org.sqlite.jdbc4.JDBC4Connection.prepareStatement(JDBC4Connection.java:48)
    at sqlite.jdbc@3.23.1/org.sqlite.jdbc3.JDBC3Connection.prepareStatement(JDBC3Connection.java:263)
    at sqlite.jdbc@3.23.1/org.sqlite.jdbc3.JDBC3Connection.prepareStatement(JDBC3Connection.java:235)
    at sqlite.jdbc@3.23.1/org.sqlite.jdbc3.JDBC3Connection.prepareStatement(JDBC3Connection.java:242)
    at AccountingFinancialModellingAndValuationApplication/com.anniemals.database.DBManager.open(DBManager.java:60)
    at AccountingFinancialModellingAndValuationApplication/com.anniemals.Main.main(Main.java:26)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:464)
    at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)

在此先感謝可以提供幫助的人。

Answer 1

該行定義的表名：

public static final String TABLE_INCOME = "Income Statements"

包含空格，這是不允許的。
更改為此：

public static final String TABLE_INCOME = "[Income Statements]"

當表或列名稱包含空格時，必須在方括號或反引號（ASCII代碼096）中將空格括起來。
您必須對包含空格或點的列名稱執行相同的操作 ：

public static final String TABLE_INCOME = "[Income Statements]";
public static final String COLUMN_INCOME_ID = "_id";
public static final String COLUMN_CLIENT_ID = "[Client ID]";
public static final String COLUMN_INCOME_DATE = "Date";
public static final String COLUMN_INCOME_TOTAL_OPER_EXPENSES = "[Total Operating Expenses]";
public static final String COLUMN_INCOME_GROSS_PROFIT = "[Gross Profit]";
public static final String COLUMN_INCOME_AMORTIZATION = "Amortization";
public static final String COLUMN_INCOME_EBITDA = "[E.B.I.T.D.A.]";
public static final String COLUMN_INCOME_PROFIT_BEFORE_TAX = "[Profit Before Tax]";
public static final String COLUMN_INCOME_TAX = "Tax";
public static final String COLUMN_INCOME_NET_PROFIT = "[Net Profit]";
public static final String COLUMN_INCOME_EARN_PER_SHARE = "[Earnings Per Share]";

似乎很奇怪的是，由於您正在嘗試向表中插入行，這意味着您已經創建了表。
但是如何？
您為CREATE語句中的表和列使用了什么名稱？

Answer 2

我找到了解決問題的方法。 它不是最漂亮的解決方案，但它可以工作。 基本上，我按照forpas的建議向DBManager類添加了一個create方法：

 public boolean checkCreateIncomeStatementTable(){
    String sql = "CREATE TABLE IF NOT EXISTS Income_Statements(\n" +
            " _id INTEGER PRIMARY KEY,\n" +
            " Client_ID INTEGER NOT NULL,\n" +
            " Date NUMERAL,\n" +
            " Total_Operating_Expenses DOUBLE NOT NULL,\n" +
            " Gross_Profit DOUBLE NOT NULL,\n" +
            " Amortization DOUBLE NOT NULL,\n" +
            " EBITDA DOUBLE NOT NULL,\n" +
            " Profit_Before_Tax DOUBLE NOT NULL,\n" +
            " Tax DOUBLE NOT NULL,\n" +
            " Net_Profit DOUBLE NOT NULL,\n" +
            " Earnings_Per_Share DOUBLE NOT NULL\n" +
            ");";
    try{
        conn = DriverManager.getConnection(DB_PATH);
        Statement statement = conn.createStatement();
        System.out.println("Database Opened");
        statement.executeQuery(sql);
        System.out.println("Checked creation of Income Statement Table");
        return true;
    } catch (SQLException e){
        System.out.println("Couldn't connect to database: " + e.getMessage());
        e.printStackTrace();
        return false;
    }
}

然后，對於每個帶有空格的列標簽，我都使用了下划線，因為Main類出於某種原因不想讀取方括號。

public static final String TABLE_INCOME = "Income_Statements";
public static final String COLUMN_INCOME_ID = "_id";
public static final String COLUMN_CLIENT_ID = "Client_ID";
public static final String COLUMN_INCOME_DATE = "Date";
public static final String COLUMN_INCOME_TOTAL_OPER_EXPENSES = "Total_Operating_Expenses";
public static final String COLUMN_INCOME_GROSS_PROFIT = "Gross_Profit";
public static final String COLUMN_INCOME_AMORTIZATION = "Amortization";
public static final String COLUMN_INCOME_EBITDA = "EBITDA";
public static final String COLUMN_INCOME_PROFIT_BEFORE_TAX = "Profit_Before_Tax";
public static final String COLUMN_INCOME_TAX = "Tax";
public static final String COLUMN_INCOME_NET_PROFIT = "Net_Profit";
public static final String COLUMN_INCOME_EARN_PER_SHARE = "Earnings_Per_Share";

現在一切似乎都正常了