supercsv

Is there any way to change value of a particular cell in a csv file in java?

℡╲_俬逩灬. 提交于 2019-12-04 06:38:34
问题 I have gone through other questions regarding this on StackOverflow but libraries mentioned there only allow to read or write. Some of them do allow partial read or write like SuperCSV but no library can be used for updating value of a particular cell. Is there some other library that can be used or do I need to do it manually? 回答1: Read in the CSV, modify the cell you want, then write it back to the file. 回答2: No, there is no way to directly update the cell in CSV file. You can read CSV line

How do I skip white-space only lines and lines having variable columns using supercsv

◇◆丶佛笑我妖孽 提交于 2019-12-04 05:31:58
问题 I am working on CSV parser requirement and I am using supercsv parser library. My CSV file can have 25 columns(separated by tab(|)) and up to 100k rows with additional header row. I would like to ignore white-space only lines and lines containing less than 25 columns. I am using IcvBeanReader with name mappings(to set csv values to pojo) and field processors(to handle validations) for reading a file. I am assuming that Supercsv IcvBeanReader will skip white space lines by default. But how to

Messed up CSV leads to Exception

百般思念 提交于 2019-12-03 21:19:57
问题 I think i found a bug. Or maybe it isn't, but Super CSV can't handle that well. I'm parsing a CSV file with 41 Columns with a MapReader. However, i'm getting that CSV - and the Webservice that gives me the CSV messes up one line. The "headline" line is a tab-delimited Row with 41 Cells. And the "wrong line" is a tab-delimited Row with 36 Cells and the content doesn't make any sense. This is the code i'm using: InputStream fis = new FileInputStream(pathToCsv); InputStreamReader inReader = new

Java to CSV file, SuperCSV Dozer: How to avoid looping for a nested object

空扰寡人 提交于 2019-12-02 15:01:37
问题 I have the below classes.. SurveyResponse.java import java.util.List; public class SurveyResponse { private int age; private Boolean consentGiven; private List<Answer> answers; public SurveyResponse() { } public SurveyResponse(final int age, final Boolean consentGiven, final List<Answer> answers) { this.age = age; this.consentGiven = consentGiven; this.answers = answers; } public int getAge() { return age; } public List<Answer> getAnswers() { return answers; } public Boolean getConsentGiven()

Is there any way to change value of a particular cell in a csv file in java?

走远了吗. 提交于 2019-12-02 12:31:33
I have gone through other questions regarding this on StackOverflow but libraries mentioned there only allow to read or write. Some of them do allow partial read or write like SuperCSV but no library can be used for updating value of a particular cell. Is there some other library that can be used or do I need to do it manually? Read in the CSV, modify the cell you want, then write it back to the file. No, there is no way to directly update the cell in CSV file. You can read CSV line by line and then column by column , update the cell (content) and write to a new file. And if you know the

Java to CSV file, SuperCSV Dozer: How to avoid looping for a nested object

人走茶凉 提交于 2019-12-02 10:50:50
I have the below classes.. SurveyResponse.java import java.util.List; public class SurveyResponse { private int age; private Boolean consentGiven; private List<Answer> answers; public SurveyResponse() { } public SurveyResponse(final int age, final Boolean consentGiven, final List<Answer> answers) { this.age = age; this.consentGiven = consentGiven; this.answers = answers; } public int getAge() { return age; } public List<Answer> getAnswers() { return answers; } public Boolean getConsentGiven() { return consentGiven; } public void setAge(final int age) { this.age = age; } public void setAnswers

How do I skip white-space only lines and lines having variable columns using supercsv

牧云@^-^@ 提交于 2019-12-02 04:10:42
I am working on CSV parser requirement and I am using supercsv parser library. My CSV file can have 25 columns(separated by tab(|)) and up to 100k rows with additional header row. I would like to ignore white-space only lines and lines containing less than 25 columns. I am using IcvBeanReader with name mappings(to set csv values to pojo) and field processors(to handle validations) for reading a file. I am assuming that Supercsv IcvBeanReader will skip white space lines by default. But how to handle if a row contains less than 25 column numbers? You can easily do this by writing your own

CSV parser in JAVA, double quotes in string (SuperCSV, OpenCSV)

十年热恋 提交于 2019-12-01 10:44:52
all day I've been searching how to resolve this probem and nothing... I want to write function, which convert CSV file to collection of lists (of strings). Here is this function: public Collection<? extends List<String>> parse() throws IOException { Collection<List<String>> collectionOfLists = new ArrayList<List<String>>(); CsvListReader parser = new CsvListReader(Files.newBufferedReader(pathToFile, StandardCharsets.UTF_8), CsvPreference.EXCEL_PREFERENCE); List<String> row; while( (row = parser.read()) != null) collectionOfLists.add(row); return collectionOfLists; } public static String

CSV parser in JAVA, double quotes in string (SuperCSV, OpenCSV)

ε祈祈猫儿з 提交于 2019-12-01 08:54:20
问题 all day I've been searching how to resolve this probem and nothing... I want to write function, which convert CSV file to collection of lists (of strings). Here is this function: public Collection<? extends List<String>> parse() throws IOException { Collection<List<String>> collectionOfLists = new ArrayList<List<String>>(); CsvListReader parser = new CsvListReader(Files.newBufferedReader(pathToFile, StandardCharsets.UTF_8), CsvPreference.EXCEL_PREFERENCE); List<String> row; while( (row =

Messed up CSV leads to Exception

落花浮王杯 提交于 2019-11-30 22:20:42
I think i found a bug. Or maybe it isn't, but Super CSV can't handle that well. I'm parsing a CSV file with 41 Columns with a MapReader. However, i'm getting that CSV - and the Webservice that gives me the CSV messes up one line. The "headline" line is a tab-delimited Row with 41 Cells. And the "wrong line" is a tab-delimited Row with 36 Cells and the content doesn't make any sense. This is the code i'm using: InputStream fis = new FileInputStream(pathToCsv); InputStreamReader inReader = new InputStreamReader(fis, "ISO-8859-1"); ICsvMapReader mapReader = new CsvMapReader(inReader, new