org.ttzero.excel.util

类 CSVUtil

java.lang.Object

org.ttzero.excel.util.CSVUtil

public class CSVUtil
extends Object

Comma-Separated Values

RFC 4180 standard Reliance on the standard documented by RFC 4180 can simplify CSV exchange. However, this standard only specifies handling of text-based fields. Interpretation of the text of each field is still application-specific.

RFC 4180 formalized CSV. It defines the MIME type "text/csv", and CSV files that follow its rules should be very widely portable. Among its requirements:

• MS-DOS-style lines that end with (CR/LF) characters (optional for the last line).
• An optional header record (there is no sure way to detect whether it is present, so care is required when importing).
• Each record "should" contain the same number of comma-separated fields.
• Any field may be quoted (with double quotes).
• Fields containing a line-break, double-quote or commas should be quoted. (If they are not, the file will likely be impossible to process correctly).
• A (double) quote character in a field must be represented by two (double) quote characters.

作者:

guanquan.wang at 2019-02-12 17:27

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	CSVUtil.Reader A CSV format file reader.
static class	CSVUtil.RowsIterator Rows iterator
static class	CSVUtil.SharedRowsIterator Shared Row iterator
static class	CSVUtil.Writer A CSV format file writer.

方法概要

限定符和类型	方法和说明
static CSVUtil.Reader	newReader(Path path) Create a CSV reader.
static CSVUtil.Reader	newReader(Path path, char separator) Create a CSV reader.
static CSVUtil.Reader	newReader(Path path, char separator, Charset charset) Create a CSV reader.
static CSVUtil.Reader	newReader(Path path, Charset charset) Create a CSV reader.
static CSVUtil.Writer	newWriter(BufferedWriter writer) Create a CSV writer
static CSVUtil.Writer	newWriter(OutputStream os) Create a CSV writer
static CSVUtil.Writer	newWriter(Path path) Create a CSV writer
static CSVUtil.Writer	newWriter(Path path, char separator) Create a CSV writer
static CSVUtil.Writer	newWriter(Path path, char separator, Charset charset) Create a CSV writer
static CSVUtil.Writer	newWriter(Path path, Charset charset) Create a CSV writer
static List<String[]>	read(Path path) Read csv format file by UTF-8 charset.
static List<String[]>	read(Path path, char separator) Read csv format file by UTF-8 charset.
static List<String[]>	read(Path path, char separator, Charset charset) Read csv format file.
static List<String[]>	read(Path path, Charset charset) Read csv format file.
static <T> List<T>	read(Path path, Class<T> clazz) Read csv format file by UTF-8 charset.
static <T> List<T>	read(Path path, Class<T> clazz, Charset charset) Read csv format file.
static void	writeTo(List<?> data, Path path) Save vector object as csv format file

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

read

public static <T> List<T> read(Path path,
                               Class<T> clazz)
                        throws IOException

Read csv format file by UTF-8 charset.

类型参数:

T - the result type

参数:

path - the csv file path

clazz - the class convert to

返回:

ArrayList of clazz

抛出:

IOException - if I/O error occur

read

public static List<String[]> read(Path path)
                           throws IOException

Read csv format file by UTF-8 charset.

参数:

path - the csv file path

返回:

ArrayList of string

抛出:

IOException - if I/O error occur

read

public static List<String[]> read(Path path,
                                  char separator)
                           throws IOException

Read csv format file by UTF-8 charset.

参数:

path - the csv file path

separator - the separator character

返回:

ArrayList of string

抛出:

IOException - if I/O error occur

read

public static <T> List<T> read(Path path,
                               Class<T> clazz,
                               Charset charset)
                        throws IOException

Read csv format file.

类型参数:

T - the result type

参数:

path - the csv file path

clazz - the class convert to

charset - the charset to use for encoding

返回:

ArrayList of clazz

抛出:

IOException - if I/O error occur

read

public static List<String[]> read(Path path,
                                  Charset charset)
                           throws IOException

Read csv format file.

参数:

path - the csv file path

charset - the charset to use for encoding

返回:

ArrayList of string

抛出:

IOException - if I/O error occur

read

public static List<String[]> read(Path path,
                                  char separator,
                                  Charset charset)
                           throws IOException

Read csv format file.

参数:

path - the csv file path

separator - the separator character

charset - the charset to use for encoding

返回:

ArrayList of string

抛出:

IOException - if I/O error occur

newReader

public static CSVUtil.Reader newReader(Path path)

Create a CSV reader.

参数:

path - the csv file path

返回:

a stream CSV format reader

newReader

public static CSVUtil.Reader newReader(Path path,
                                       Charset charset)

Create a CSV reader.

参数:

path - the csv file path

charset - the charset to use for encoding

返回:

a stream CSV format reader

newReader

public static CSVUtil.Reader newReader(Path path,
                                       char separator)

Create a CSV reader.

参数:

path - the csv file path

separator - the separator character

返回:

a stream CSV format reader

newReader

public static CSVUtil.Reader newReader(Path path,
                                       char separator,
                                       Charset charset)

Create a CSV reader.

参数:

path - the csv file path

separator - the separator character

charset - the charset to use for encoding

返回:

a stream CSV format reader

writeTo

public static void writeTo(List<?> data,
                           Path path)
                    throws IOException

Save vector object as csv format file

参数:

data - the vector object to be save

path - the save path

抛出:

IOException - if I/O error occur

newWriter

public static CSVUtil.Writer newWriter(Path path)
                                throws IOException

Create a CSV writer

参数:

path - the storage path

返回:

a CSV format writer

抛出:

IOException - no permission or other I/O error occur

newWriter

public static CSVUtil.Writer newWriter(Path path,
                                       Charset charset)
                                throws IOException

Create a CSV writer

参数:

path - the storage path

charset - the charset to use for encoding

返回:

a CSV format writer

抛出:

IOException - no permission or other I/O error occur

newWriter

public static CSVUtil.Writer newWriter(Path path,
                                       char separator)
                                throws IOException

Create a CSV writer

参数:

path - the storage path

separator - the separator character

返回:

a CSV format writer

抛出:

IOException - no permission or other I/O error occur

newWriter

public static CSVUtil.Writer newWriter(Path path,
                                       char separator,
                                       Charset charset)
                                throws IOException

Create a CSV writer

参数:

path - the storage path

separator - the separator character

charset - the charset to use for encoding

返回:

a CSV format writer

抛出:

IOException - no permission or other I/O error occur

newWriter

public static CSVUtil.Writer newWriter(BufferedWriter writer)

Create a CSV writer

参数:

writer - the BufferedWriter

返回:

a CSV format writer

newWriter

public static CSVUtil.Writer newWriter(OutputStream os)

Create a CSV writer

参数:

os - the OutputStream

返回:

a CSV format writer