jQuery复选框-仅获取已选中复选框的值

Question

 $(function() { $('input[type=checkbox]').change( function() { if ($(this).is(':checked')) { document.getElementById("chk_option").value += this.value + ","; alert($("#chk_option").val()); } else { document.getElementById("chk_option_remove").value += this.value + ","; } } ); }); 

 <div> <center> <form id="form_tarif" class="form-horizontal" style="padding-top:57px;" action="pricesinput" method="POST"> <input type="hidden" id="chk_option" name="chk_option"> <input type="hidden" id="chk_option_remove" name="chk_option_remove"> <c:forEach items="${option_tarif_list}" var="option_tarif" varStatus="loop"> <div class="checkbox1"> <label> <input type="checkbox" name="tarif_inclue[]" value="${option_tarif.id}" class="checkboxchk" id="option_tarif_chk_${option_tarif.id}">${option_tarif.libelle} </label> </div> </c:forEach </form> </center> </div> 

Hi,

Can you please help me with the following JS. I need to take the values of only the checked checkbox and use it in the id #chk_option. I will then use this id in my Java code for insertion into the database.

Here is part of my java code below:

String currentTypeTarifIdStr = request.getParameter("current_typetarif_id");
        Integer currentTypeTarifId = Integer.valueOf(currentTypeTarifIdStr);

        String TypeTarifIdToRemoveStr = request.getParameter("typetarif_id_to_remove");
        Integer TypeTarifIdToRemove = Integer.valueOf(TypeTarifIdToRemoveStr);

        Integer trimmedOptionSplit = 0;
        String optionChkStr = request.getParameter("chk_option");
        String[] optionSplitStrs = optionChkStr.split(",");


        String TypeTarifOptionToRemoveStr = request.getParameter("typetarif_option_to_remove");
        Integer TypeTarifOptionToRemove = Integer.valueOf(TypeTarifOptionToRemoveStr);





                        query = mEntityManager.createQuery("DELETE FROM TarifTypeOptionEntity WHERE typeTarifId=:pId");
                        int deletedCount = query.setParameter("pId", currentTypeTarifId).executeUpdate();
                        mUserTransaction.commit();


                        for (String optionSplitStr : optionSplitStrs) {
                            String trimmedOptionSplitStr = optionSplitStr.trim();
                            // do something with trimmedOptionSplitStr
                            if (!trimmedOptionSplitStr.equals("")) {
                                trimmedOptionSplit = Integer.valueOf(trimmedOptionSplitStr);
                            }

                            mUserTransaction.begin();
                            TarifTypeOptionEntity typeTarifTypeOption = new TarifTypeOptionEntity();
                            typeTarifTypeOption.setTypeTarifId(currentTypeTarifId);
                            typeTarifTypeOption.setTarifOptionId(trimmedOptionSplit);
                            mEntityManager.persist(typeTarifTypeOption);
                        mUserTransaction.commit();
                        }

                    mUserTransaction.begin();
                    }

I will first delete everything in the database, then insert only the checked checkbox in the database. To do so, i should concatenate all the checked values with a comma. Then in my java code, i will split it and remove the commas.

But it's not happening. can someone please help me with the coding and spot what i'm doing wrong.

EDITS:

No error in the console and the alert does work. Infact this code works perfectly. On clicking the checkbox the if clause is executed and each time i check another checkbox the value is added following a comma. This is those values that i will need in java. But it's not exacly what i need from this code.

Right now it adds only the value i unchecked from the checkbox into the database. But ofcourse this can't happen because this value is already present, . so i get the error Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails ( locforall_booking . t_be_tarif_type_option , CONSTRAINT fk_t_be_type_tarif_option_t_be_tarif_option1 FOREIGN KEY ( be_tarif_option_id ) REFERENCES t_be_tarif_option ( id ) ON DELETE CASCA)

Scenario of my problem: If while i have 2 values checked and i don't uncheck it but check a third value, it will delete everything in the database and only keep that third value. But what i actually need is for it to delete everything in the database and keep all values including the third one.

Any Javascript expert around who can help please?

Answer 1

You can perform this using 2D array as:

<html>

    var items = [["abc.jpg", "xyz.jpg"],["123.jpg","345.jpg"]];
    alert(items[1][1]); // 345.jpg
</script>
</html>