Question

如果字符串包含双引号（"）字符，如何在SQLite中搜索？

当我尝试搜索这些应用程序崩溃时。

我的代码

public Boolean readbookname(String bookname) {

    bookname=bookname.replace("\"", "\"'");

    Cursor cursor = myDataBase.rawQuery("select book_name From book_data WHERE book_name=\"" + bookname + "\"", null);

    if (cursor.moveToFirst()) {
        return true;
    } else {
        return false;
    }
}

错误日志

android.database.sqlite.SQLiteException: unrecognized token: "'"" (code 1): , while compiling: select book_name From book_data WHERE book_name="'"'"
    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:893)
    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:504)
    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
    at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
    at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
    at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1341)
    at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1280)
    at ktech4.brilliantinnovator.com.k4tech.DBManager.readbookname(DBManager.java:355)
    at ktech4.brilliantinnovator.com.k4tech.CustomDialogClass.onClick(CustomDialogClass.java:74)
    at android.view.View.performClick(View.java:4803)
    at android.view.View$PerformClick.run(View.java:20102)
    at android.os.Handler.handleCallback(Handler.java:810)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:189)
    at android.app.ActivityThread.main(ActivityThread.java:5532)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)

Answer 1

删除bookname=bookname.replace("\"", "\"'");并更改

 Cursor cursor = myDataBase.rawQuery("select book_name From book_data WHERE book_name=\"" + bookname + "\"", null);

要

 Cursor cursor = myDataBase.rawQuery("select book_name From book_data WHERE book_name='" + bookname + "'", null);

Answer 2

"select book_name From book_data WHERE book_name='" + bookname + "'"

尝试将您的查询设为这样

如果字符串包含双引号，则搜索SQLite表

2 个答案: