Use Java to write search and filter functions for form data

Use Java to write search and filtering functions for form data

With the rapid development of information technology, a large amount of data needs to be searched and filtered in order to find the required information . In web development, users often fill in forms to submit data, so it is very important to implement search and filtering functions for form data. This article will introduce how to use Java to write search and filter functions for form data, and provide code examples.

1. Implementation of search function

To implement the search function of form data, you first need to obtain the search conditions entered by the user, then traverse the form data, find data that meets the conditions and return the results. Here is a sample code:

public List<Form> searchFormData(String searchStr, List<Form> formData) {
    List<Form> resultList = new ArrayList<>();
    for (Form form : formData) {
        if (formContainsSearchStr(searchStr, form)) {
            resultList.add(form);
        }
    }
    return resultList;
}

private boolean formContainsSearchStr(String searchStr, Form form) {
    return form.getName().contains(searchStr)
            || form.getEmail().contains(searchStr)
            || form.getPhone().contains(searchStr);
}

In the above code, the searchFormData method receives a search string searchStr and a list containing the form data formData, and returns a list containing form data that meets the conditions. formContainsSearchStrThe method is used to determine whether a certain form data contains a search string.

2. Implementation of filtering function

In addition to the search function, sometimes we also need to filter form data through certain conditions. For example, only display form data submitted within a specific date. Here is a sample code:

public List<Form> filterFormData(Date startDate, Date endDate, List<Form> formData) {
    List<Form> resultList = new ArrayList<>();
    for (Form form : formData) {
        if (formIsWithinDateRange(startDate, endDate, form)) {
            resultList.add(form);
        }
    }
    return resultList;
}

private boolean formIsWithinDateRange(Date startDate, Date endDate, Form form) {
    return form.getSubmitDate().after(startDate)
            && form.getSubmitDate().before(endDate);
}

In the above code, the filterFormData method receives a start date startDate, an end date endDate and A list containing form dataformData, and returns a list containing form data that meets the date range. formIsWithinDateRangeThe method is used to determine whether a certain form data is within the date range.

3. Comprehensive application

Normally, we will use the search and filter functions at the same time to filter form data. The following is an example of a comprehensive application:

public List<Form> searchAndFilterFormData(String searchStr, Date startDate, Date endDate, List<Form> formData) {
    List<Form> resultList = new ArrayList<>();
    for (Form form : formData) {
        if (formContainsSearchStr(searchStr, form) && formIsWithinDateRange(startDate, endDate, form)) {
            resultList.add(form);
        }
    }
    return resultList;
}

In the above code, the searchAndFilterFormData method receives a search string searchStr, a start date startDate, an end date endDate and a list containing form data formData, and returns a list containing form data that satisfies the search criteria and is within the date range.

Summary:

This article introduces how to use Java to write the search and filtering functions of form data. By obtaining the search conditions and filter conditions entered by the user and traversing the form data for comparison, we can implement search and filter operations on the form data. This makes it easier to find the information you need from large amounts of data. The above code examples can be used as a reference and can be modified and expanded according to actual needs.

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