java数据库sql语句报错：delete

报错信息：StatementCallback; bad SQL grammar [DELETE from graphedges where target = node20213246184944850]; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'node20213246184944850' in 'where clause'

问题代码：`

public int delete_whichTable_whichAttribute_whichParam(String tableName, String attribute, String param) {
        return jdbcTemplate.update("DELETE from "+tableName+" where "+attribute+" = "+param);
    }`

问题原因：如果直接+param，那么转换为sql语句将没有引号，需要改正为以下代码：

    @Override
    public int delete_whichTable_whichAttribute_whichParam(String tableName, String attribute, String param) {
        return jdbcTemplate.update("DELETE from "+tableName+" where "+attribute+" = ?",param);
    }

修改：" = “+param);改为” = ?",param);