CsvReader (appframework 2.2.0 API)

java.lang.Object
- org.jiucai.appframework.common.csv.CsvReader

```
public class CsvReader
extends Object
```
A stream based parser for parsing delimited text data from a file or a stream.

字段概要

字段
限定符和类型	字段和说明
`static int`	`ESCAPE_MODE_BACKSLASH` Use a backslash character before the text qualifier to represent an occurance of the text qualifier.
`static int`	`ESCAPE_MODE_DOUBLED` Double up the text qualifier to represent an occurance of the text qualifier.

构造器概要

构造器
构造器和说明
`CsvReader(InputStream inputStream, char delimiter, Charset charset)` Constructs a `CsvReader` object using an `InputStream` object as the data source.
`CsvReader(InputStream inputStream, Charset charset)` Constructs a `CsvReader` object using an `InputStream` object as the data source.
`CsvReader(Reader inputStream)` Constructs a `CsvReader` object using a `Reader` object as the data source.
`CsvReader(Reader inputStream, char delimiter)` Constructs a `CsvReader` object using a `Reader` object as the data source.
`CsvReader(String fileName)` Creates a `CsvReader` object using a file as the data source.
`CsvReader(String fileName, char delimiter)` Creates a `CsvReader` object using a file as the data source.
`CsvReader(String fileName, char delimiter, Charset charset)` Creates a `CsvReader` object using a file as the data source.

方法概要

方法
限定符和类型	方法和说明
`void`	`close()` Closes and releases all related resources.
`protected void`	`finalize()`
`String`	`get(int columnIndex)` Returns the current column value for a given column index.
`String`	`get(String headerName)` Returns the current column value for a given column header name.
`boolean`	`getCaptureRawRecord()`
`int`	`getColumnCount()` Gets the count of columns found in this record.
`char`	`getComment()` Gets the character being used as a comment signal.
`long`	`getCurrentRecord()` Gets the index of the current record.
`char`	`getDelimiter()` Gets the character being used as the column delimiter.
`int`	`getEscapeMode()` Gets the current way to escape an occurance of the text qualifier inside qualified data.
`String`	`getHeader(int columnIndex)` Returns the column header value for a given column index.
`int`	`getHeaderCount()` Gets the count of headers read in by a previous call to `readHeaders()`.
`String[]`	`getHeaders()` Returns the header values as a string array.
`int`	`getIndex(String headerName)` Gets the corresponding column index for a given column header name.
`String`	`getRawRecord()`
`char`	`getRecordDelimiter()`
`boolean`	`getSafetySwitch()` Safety caution to prevent the parser from using large amounts of memory in the case where parsing settings like file encodings don't end up matching the actual format of a file.
`boolean`	`getSkipEmptyRecords()`
`char`	`getTextQualifier()` Gets the character to use as a text qualifier in the data.
`boolean`	`getTrimWhitespace()` Gets whether leading and trailing whitespace characters are being trimmed from non-textqualified column data.
`boolean`	`getUseComments()` Gets whether comments are being looked for while parsing or not.
`boolean`	`getUseTextQualifier()` Whether text qualifiers will be used while parsing or not.
`String[]`	`getValues()`
`boolean`	`isQualified(int columnIndex)`
`static CsvReader`	`parse(String data)` Creates a `CsvReader` object using a string of data as the source.
`boolean`	`readHeaders()` Read the first record of data as column headers.
`boolean`	`readRecord()` Reads another record.
`void`	`setCaptureRawRecord(boolean captureRawRecord)`
`void`	`setComment(char comment)` Sets the character to use as a comment signal.
`void`	`setDelimiter(char delimiter)` Sets the character to use as the column delimiter.
`void`	`setEscapeMode(int escapeMode)` Sets the current way to escape an occurance of the text qualifier inside qualified data.
`void`	`setHeaders(String[] headers)`
`void`	`setRecordDelimiter(char recordDelimiter)` Sets the character to use as the record delimiter.
`void`	`setSafetySwitch(boolean safetySwitch)` Safety caution to prevent the parser from using large amounts of memory in the case where parsing settings like file encodings don't end up matching the actual format of a file.
`void`	`setSkipEmptyRecords(boolean skipEmptyRecords)`
`void`	`setTextQualifier(char textQualifier)` Sets the character to use as a text qualifier in the data.
`void`	`setTrimWhitespace(boolean trimWhitespace)` Sets whether leading and trailing whitespace characters should be trimmed from non-textqualified column data or not.
`void`	`setUseComments(boolean useComments)` Sets whether comments are being looked for while parsing or not.
`void`	`setUseTextQualifier(boolean useTextQualifier)` Sets whether text qualifiers will be used while parsing or not.
`boolean`	`skipLine()` Skips the next line of data using the standard end of line characters and does not do any column delimited parsing.
`boolean`	`skipRecord()` Skips the next record of data by parsing each column.

从类继承的方法 java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - ESCAPE_MODE_DOUBLED
```
public static final int ESCAPE_MODE_DOUBLED
```
    Double up the text qualifier to represent an occurance of the text qualifier.
    
    另请参阅:
    常量字段值
  - ESCAPE_MODE_BACKSLASH
```
public static final int ESCAPE_MODE_BACKSLASH
```
    Use a backslash character before the text qualifier to represent an occurance of the text qualifier.
    
    另请参阅:
    常量字段值
- 构造器详细资料
  - CsvReader
```
public CsvReader(InputStream inputStream,
         char delimiter,
         Charset charset)
```
    Constructs a CsvReader object using an InputStream object as the data source.
    
    参数:
    inputStream - The stream to use as the data source.
    delimiter - The character to use as the column delimiter.
    charset - The Charset to use while parsing the data.
  - CsvReader
```
public CsvReader(InputStream inputStream,
         Charset charset)
```
    Constructs a CsvReader object using an InputStream object as the data source. Uses a comma as the column delimiter.
    
    参数:
    inputStream - The stream to use as the data source.
    charset - The Charset to use while parsing the data.
  - CsvReader
```
public CsvReader(Reader inputStream)
```
    Constructs a CsvReader object using a Reader object as the data source. Uses a comma as the column delimiter.
    
    参数:
    inputStream - The stream to use as the data source.
  - CsvReader
```
public CsvReader(Reader inputStream,
         char delimiter)
```
    Constructs a CsvReader object using a Reader object as the data source.
    
    参数:
    inputStream - The stream to use as the data source.
    delimiter - The character to use as the column delimiter.
  - CsvReader
```
public CsvReader(String fileName)
          throws FileNotFoundException
```
    Creates a CsvReader object using a file as the data source. Uses a comma as the column delimiter and ISO-8859-1 as the Charset.
    
    参数:
    fileName - The path to the file to use as the data source.
    
    抛出:
    
    FileNotFoundException - FileNotFoundException
  - CsvReader
```
public CsvReader(String fileName,
         char delimiter)
          throws FileNotFoundException
```
    Creates a CsvReader object using a file as the data source. Uses ISO-8859-1 as the Charset.
    
    参数:
    fileName - The path to the file to use as the data source.
    delimiter - The character to use as the column delimiter.
    
    抛出:
    
    FileNotFoundException - FileNotFoundException
  - CsvReader
```
public CsvReader(String fileName,
         char delimiter,
         Charset charset)
          throws FileNotFoundException
```
    Creates a CsvReader object using a file as the data source.
    
    参数:
    fileName - The path to the file to use as the data source.
    delimiter - The character to use as the column delimiter.
    charset - The Charset to use while parsing the data.
    
    抛出:
    
    FileNotFoundException - FileNotFoundException
- 方法详细资料
  - parse
```
public static CsvReader parse(String data)
```
    Creates a CsvReader object using a string of data as the source. Uses ISO-8859-1 as the Charset.
    
    参数:
    data - The String of data to use as the source.
    
    返回:
    A CsvReader object using the String of data as the source.
  - close
```
public void close()
```
    Closes and releases all related resources.
  - get
```
public String get(int columnIndex)
           throws IOException
```
    Returns the current column value for a given column index.
    
    参数:
    columnIndex - The index of the column.
    
    返回:
    The current column value.
    
    抛出:
    
    IOException - Thrown if this object has already been closed.
  - get
```
public String get(String headerName)
           throws IOException
```
    Returns the current column value for a given column header name.
    
    参数:
    headerName - The header name of the column.
    
    返回:
    The current column value.
    
    抛出:
    
    IOException - Thrown if this object has already been closed.
  - getCaptureRawRecord
```
public boolean getCaptureRawRecord()
```
  - getColumnCount
```
public int getColumnCount()
```
    Gets the count of columns found in this record.
    
    返回:
    The count of columns found in this record.
  - getComment
```
public char getComment()
```
    Gets the character being used as a comment signal.
    
    返回:
    The character being used as a comment signal.
  - getCurrentRecord
```
public long getCurrentRecord()
```
    Gets the index of the current record.
    
    返回:
    The index of the current record.
  - getDelimiter
```
public char getDelimiter()
```
    Gets the character being used as the column delimiter. Default is comma, ','.
    
    返回:
    The character being used as the column delimiter.
  - getEscapeMode
```
public int getEscapeMode()
```
    Gets the current way to escape an occurance of the text qualifier inside qualified data.
    
    返回:
    The current way to escape an occurance of the text qualifier inside qualified data.
  - getHeader
```
public String getHeader(int columnIndex)
                 throws IOException
```
    Returns the column header value for a given column index.
    
    参数:
    columnIndex - The index of the header column being requested.
    
    返回:
    The value of the column header at the given column index.
    
    抛出:
    
    IOException - Thrown if this object has already been closed.
  - getHeaderCount
```
public int getHeaderCount()
```
    Gets the count of headers read in by a previous call to readHeaders().
    
    返回:
    The count of headers read in by a previous call to readHeaders().
  - getHeaders
```
public String[] getHeaders()
                    throws IOException
```
    Returns the header values as a string array.
    
    返回:
    The header values as a String array.
    
    抛出:
    
    IOException - Thrown if this object has already been closed.
  - getIndex
```
public int getIndex(String headerName)
             throws IOException
```
    Gets the corresponding column index for a given column header name.
    
    参数:
    headerName - The header name of the column.
    
    返回:
    The column index for the given column header name. Returns -1 if not found.
    
    抛出:
    
    IOException - Thrown if this object has already been closed.
  - getRawRecord
```
public String getRawRecord()
```
  - getRecordDelimiter
```
public char getRecordDelimiter()
```
  - getSafetySwitch
```
public boolean getSafetySwitch()
```
    Safety caution to prevent the parser from using large amounts of memory in the case where parsing settings like file encodings don't end up matching the actual format of a file. This switch can be turned off if the file format is known and tested. With the switch off, the max column lengths and max column count per record supported by the parser will greatly increase. Default is true.
    
    返回:
    The current setting of the safety switch.
  - getSkipEmptyRecords
```
public boolean getSkipEmptyRecords()
```
  - getTextQualifier
```
public char getTextQualifier()
```
    Gets the character to use as a text qualifier in the data.
    
    返回:
    The character to use as a text qualifier in the data.
  - getTrimWhitespace
```
public boolean getTrimWhitespace()
```
    Gets whether leading and trailing whitespace characters are being trimmed from non-textqualified column data. Default is true.
    
    返回:
    Whether leading and trailing whitespace characters are being trimmed from non-textqualified column data.
  - getUseComments
```
public boolean getUseComments()
```
    Gets whether comments are being looked for while parsing or not.
    
    返回:
    Whether comments are being looked for while parsing or not.
  - getUseTextQualifier
```
public boolean getUseTextQualifier()
```
    Whether text qualifiers will be used while parsing or not.
    
    返回:
    Whether text qualifiers will be used while parsing or not.
  - getValues
```
public String[] getValues()
                   throws IOException
```
    抛出:
    
    IOException
  - isQualified
```
public boolean isQualified(int columnIndex)
                    throws IOException
```
    抛出:
    
    IOException
  - readHeaders
```
public boolean readHeaders()
                    throws IOException
```
    Read the first record of data as column headers.
    
    返回:
    Whether the header record was successfully read or not.
    
    抛出:
    
    IOException - Thrown if an error occurs while reading data from the source stream.
  - readRecord
```
public boolean readRecord()
                   throws IOException
```
    Reads another record.
    
    返回:
    Whether another record was successfully read or not.
    
    抛出:
    
    IOException - Thrown if an error occurs while reading data from the source stream.
  - setCaptureRawRecord
```
public void setCaptureRawRecord(boolean captureRawRecord)
```
  - setComment
```
public void setComment(char comment)
```
    Sets the character to use as a comment signal.
    
    参数:
    comment - The character to use as a comment signal.
  - setDelimiter
```
public void setDelimiter(char delimiter)
```
    Sets the character to use as the column delimiter. Default is comma, ','.
    
    参数:
    delimiter - The character to use as the column delimiter.
  - setEscapeMode
```
public void setEscapeMode(int escapeMode)
                   throws IllegalArgumentException
```
    Sets the current way to escape an occurance of the text qualifier inside qualified data.
    
    参数:
    escapeMode - The way to escape an occurance of the text qualifier inside qualified data.
    
    抛出:
    
    IllegalArgumentException - When an illegal value is specified for escapeMode.
  - setHeaders
```
public void setHeaders(String[] headers)
```
  - setRecordDelimiter
```
public void setRecordDelimiter(char recordDelimiter)
```
    Sets the character to use as the record delimiter.
    
    参数:
    recordDelimiter - The character to use as the record delimiter. Default is combination of standard end of line characters for Windows, Unix, or Mac.
  - setSafetySwitch
```
public void setSafetySwitch(boolean safetySwitch)
```
    Safety caution to prevent the parser from using large amounts of memory in the case where parsing settings like file encodings don't end up matching the actual format of a file. This switch can be turned off if the file format is known and tested. With the switch off, the max column lengths and max column count per record supported by the parser will greatly increase. Default is true.
    
    参数:
    safetySwitch - safetySwitch
  - setSkipEmptyRecords
```
public void setSkipEmptyRecords(boolean skipEmptyRecords)
```
  - setTextQualifier
```
public void setTextQualifier(char textQualifier)
```
    Sets the character to use as a text qualifier in the data.
    
    参数:
    textQualifier - The character to use as a text qualifier in the data.
  - setTrimWhitespace
```
public void setTrimWhitespace(boolean trimWhitespace)
```
    Sets whether leading and trailing whitespace characters should be trimmed from non-textqualified column data or not. Default is true.
    
    参数:
    trimWhitespace - Whether leading and trailing whitespace characters should be trimmed from non-textqualified column data or not.
  - setUseComments
```
public void setUseComments(boolean useComments)
```
    Sets whether comments are being looked for while parsing or not.
    
    参数:
    useComments - Whether comments are being looked for while parsing or not.
  - setUseTextQualifier
```
public void setUseTextQualifier(boolean useTextQualifier)
```
    Sets whether text qualifiers will be used while parsing or not.
    
    参数:
    useTextQualifier - Whether to use a text qualifier while parsing or not.
  - skipLine
```
public boolean skipLine()
                 throws IOException
```
    Skips the next line of data using the standard end of line characters and does not do any column delimited parsing.
    
    返回:
    Whether a line was successfully skipped or not.
    
    抛出:
    
    IOException - Thrown if an error occurs while reading data from the source stream.
  - skipRecord
```
public boolean skipRecord()
                   throws IOException
```
    Skips the next record of data by parsing each column. Does not increment getCurrentRecord().
    
    返回:
    Whether another record was successfully skipped or not.
    
    抛出:
    
    IOException - Thrown if an error occurs while reading data from the source stream.
  - finalize
```
protected void finalize()
```
    覆盖:
    
    finalize 在类中 Object

类 CsvReader

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

ESCAPE_MODE_DOUBLED

ESCAPE_MODE_BACKSLASH

构造器详细资料

CsvReader

CsvReader

CsvReader

CsvReader

CsvReader

CsvReader

CsvReader

方法详细资料

parse

close

get

get

getCaptureRawRecord

getColumnCount

getComment

getCurrentRecord

getDelimiter

getEscapeMode

getHeader

getHeaderCount

getHeaders

getIndex

getRawRecord

getRecordDelimiter

getSafetySwitch

getSkipEmptyRecords

getTextQualifier

getTrimWhitespace

getUseComments

getUseTextQualifier

getValues

isQualified

readHeaders

readRecord

setCaptureRawRecord

setComment

setDelimiter

setEscapeMode

setHeaders

setRecordDelimiter

setSafetySwitch

setSkipEmptyRecords

setTextQualifier

setTrimWhitespace

setUseComments

setUseTextQualifier

skipLine

skipRecord

finalize