带引号的ORMLite查询,Android

我正在使用ORMLite,使用Table RecentSearch：

@DatabaseTable(tableName = LocalStorageConfig.sql_RECENTS_TABLE_NAME)
public class RecentSearch {

    @DatabaseField
    public String search_text;
    public static String sql_SEARCH_FIELD = "search_text";

    @DatabaseField
    public String location_text;
    public static String sql_LOCATION_FIELD = "location_text";

    @DatabaseField
    public Date creation_date = new Date();
    public static String sql_CREATION_DATE_FIELD = "creation_date";

它几乎一直在工作,但当我发现包含’的字符串的情况时,它似乎是一个问题.你知道怎么解决这个问题吗？我找不到我要找的东西.

这是我删除最近的功能

public boolean deleteRecent(RecentSearch search) {
    try {
        Dao<RecentSearch,Integer> recentsDao = recentssqlManager.getRecentsDao();
        DeleteBuilder<RecentSearch,Integer> deleteBuilder = recentsDao.deleteBuilder();

        deleteBuilder.where().eq(RecentSearch.sql_SEARCH_FIELD,search.getSearch_text()).and().eq(RecentSearch.sql_LOCATION_FIELD,search.location_text);
        recentsDao.delete(deleteBuilder.prepare());
        return true;
    } catch (Exception e) {
        Log.e(TAG,"Database exception",e);
        return false;
    }
}

这是我得到的例外情况：

java.sql.sqlException: Problems executing Android statement: DELETE FROM `recent_searches` WHERE (`search_text` = '' AND `location_text` = 'Villefranche-d'Allier,Allier' ) 
    at com.j256.ormlite.misc.sqlExceptionUtil.create(sqlExceptionUtil.java:22)
    at com.j256.ormlite.android.AndroidCompiledStatement.runUpdate(AndroidCompiledStatement.java:66)
    at com.j256.ormlite.stmt.StatementExecutor.delete(StatementExecutor.java:425)
    at com.j256.ormlite.dao.BaseDaoImpl.delete(BaseDaoImpl.java:347)
...
Caused by: android.database.sqlite.sqliteException: near "Allier": Syntax error:,while compiling: DELETE FROM `recent_searches` WHERE (`search_text` = '' AND `location_text` = 'Villefranche-d'Allier,Allier' ) 
    at android.database.sqlite.sqliteCompiledsql.native_compile(Native Method)
    at android.database.sqlite.sqliteCompiledsql.compile(sqliteCompiledsql.java:92)
    at android.database.sqlite.sqliteCompiledsql.<init>(sqliteCompiledsql.java:65)
    at android.database.sqlite.sqliteProgram.<init>(sqliteProgram.java:83)
    at android.database.sqlite.sqliteStatement.<init>(sqliteStatement.java:41)
    at android.database.sqlite.sqliteDatabase.compileStatement(sqliteDatabase.java:1149)

解决方法

在 ORMLite中,当您尝试使用引号构建查询时,应该使用SelectArg功能,该功能将使用sql 生成查询？参数然后直接将字符串传递给预准备语句.这解决了转义特殊字符的任何问题,并保护您免受sql注入安全问题的影响.见 documentation on SelectArg.

使用SelectArg,您可以执行以下操作：

DeleteBuilder<RecentSearch,Integer> deleteBuilder = recentsDao.deleteBuilder();

// create our argument which uses a sql ?
SelectArg locationArg = new SelectArg(search.location_text);
deleteBuilder.where().eq(RecentSearch.sql_SEARCH_FIELD,search.getSearch_text())
    .and().eq(RecentSearch.sql_LOCATION_FIELD,locationArg);
recentsDao.delete(deleteBuilder.prepare());
...

原文链接：https://www.f2er.com/android/318302.html

带引号的ORMLite查询,Android

解决方法

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