POI 单元格类型CellType

1. 单元格类型

单元格的内容决定了单元格的类型，POI中定义的7种单元格类型：   

1. 日期数据对应的单元格类型是CellType.NUMERIC，默认以浮点型数显示，显示为日期格式需要设置单元格样式DataFormat
2. 字符型单元格内容也可以为富文本RichTextString，可以对文本多部分设置字体Font

2. 错误单元格

Excel中存在错误单元格，在POI中是怎么表现的呢

org.apache.poi.ss.usermodel.FormulaError

• 1

package org.apache.poi.ss.usermodel;

import java.util.Map;

import org.apache.poi.util.Internal;

import java.util.HashMap;

/**

• Enumerates error values in SpreadsheetML formula calculations.

• See also OOO's excelfileformat.pdf (2.5.6) */
  public enum FormulaError {
  @Internal
  _NO_ERROR(-1, "(no error)"),

  /**

  • Intended to indicate when two areas are required to intersect, but do not.

    * `<p>` Example: 

• In the case of SUM(B1 C1), the space between B1 and C1 is treated as the binary
• intersection operator, when a comma was intended. end example]

    * `</p>`  

*/
NULL(0x00, "#NULL!"),

/**

• Intended to indicate when any number, including zero, is divided by zero.
• Note: However, any error code divided by zero results in that error code. */
  DIV0(0x07, "#DIV/0!"),

/**

• Intended to indicate when an incompatible type argument is passed to a function, or
• an incompatible type operand is used with an operator.

    * `<p>` Example: 

• In the case of a function argument, text was expected, but a number was provided

    * `</p>`  

*/
VALUE(0x0F, "#VALUE!"),

/**

• Intended to indicate when a cell reference is invalid.

    * `<p>` Example: 

• If a formula contains a reference to a cell, and then the row or column containing that cell is deleted,
• a #REF! error results. If a worksheet does not support 20,001 columns,
• OFFSET(A1,0,20000) will result in a #REF! error.

    * `</p>`  

*/
REF(0x17, "#REF!"),

/**

• Intended to indicate when what looks like a name is used, but no such name has been defined.

    * `<p>` Example: 

• XYZ/3, where XYZ is not a defined name. Total is & A10,
• where neither Total nor is is a defined name. Presumably, "Total is " & A10
• was intended. SUM(A1C10), where the range A1:C10 was intended.

    * `</p>`  

*/
NAME(0x1D, "#NAME?"),

/**

• Intended to indicate when an argument to a function has a compatible type, but has a
• value that is outside the domain over which that function is defined. (This is known as
• a domain error.)

    * `<p>` Example: 

• Certain calls to ASIN, ATANH, FACT, and SQRT might result in domain errors.

    * `</p>`  

• Intended to indicate that the result of a function cannot be represented in a value of
• the specified type, typically due to extreme magnitude. (This is known as a range
• error.)

    * `<p>` Example: FACT(1000) might result in a range error. `</p>`  

*/
NUM(0x24, "#NUM!"),

/**

• Intended to indicate when a designated value is not available.

    * `<p>` Example: 

• Some functions, such as SUMX2MY2, perform a series of operations on corresponding
• elements in two arrays. If those arrays do not have the same number of elements, then
• for some elements in the longer array, there are no corresponding elements in the
• shorter one; that is, one or more values in the shorter array are not available.

    * `</p>`  

• This error value can be produced by calling the function NA */
  NA(0x2A, "#N/A"),

// These are POI-specific error codes
// It is desirable to make these (arbitrary) strings look clearly different from any other
// value expression that might appear in a formula. In addition these error strings should
// look unlike the standard Excel errors. Hence tilde ('~') was used.

/**

• POI specific code to indicate that there is a circular reference
• in the formula /
  CIRCULAR_REF(0xFFFFFFC4, "CIRCULARREF~"),
  /*
• POI specific code to indicate that the funcition required is
• not implemented in POI */
  FUNCTION_NOT_IMPLEMENTED(0xFFFFFFE2, "FUNCTIONNOTIMPLEMENTED");

private final byte type;
private final int longType;
private final String repr;

private FormulaError(int type, String repr) {
this.type = (byte)type;
this.longType = type;
this.repr = repr;
}

/**

• @return numeric code of the error /
  public byte getCode() {
  return type;
  }
  /*
• @return long (internal) numeric code of the error */
  public int getLongCode() {
  return longType;
  }

/**

• @return string representation of the error */
  public String getString() {
  return repr;
  }

private static final Map<String, FormulaError> smap = new HashMap<String, FormulaError> ();
private static final Map<Byte, FormulaError> bmap = new HashMap<Byte, FormulaError> ();
private static final Map<Integer, FormulaError> imap = new HashMap<Integer, FormulaError> ();
static{
for (FormulaError error : values()) {
bmap.put(error.getCode(), error);
imap.put(error.getLongCode(), error);
smap.put(error.getString(), error);
}
}

public static final boolean isValidCode(int errorCode) {
for (FormulaError error : values()) {
if (error.getCode() == errorCode) return true;
if (error.getLongCode() == errorCode) return true;
}
return false;
}

public static FormulaError forInt(byte type) throws IllegalArgumentException {
FormulaError err = bmap.get(type);
if(err == null) throw new IllegalArgumentException("Unknown error type: " + type);
return err;
}
public static FormulaError forInt(int type) throws IllegalArgumentException {
FormulaError err = imap.get(type);
if(err == null) err = bmap.get((byte)type);
if(err == null) throw new IllegalArgumentException("Unknown error type: " + type);
return err;
}

public static FormulaError forString(String code) throws IllegalArgumentException {
FormulaError err = smap.get(code);
if(err == null) throw new IllegalArgumentException("Unknown error code: " + code);
return err;
}
}

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• 51
• 52
• 53
• 54
• 55
• 56
• 57
• 58
• 59
• 60
• 61
• 62
• 63
• 64
• 65
• 66
• 67
• 68
• 69
• 70
• 71
• 72
• 73
• 74
• 75
• 76
• 77
• 78
• 79
• 80
• 81
• 82
• 83
• 84
• 85
• 86
• 87
• 88
• 89
• 90
• 91
• 92
• 93
• 94
• 95
• 96
• 97
• 98
• 99
• 100
• 101
• 102
• 103
• 104
• 105
• 106
• 107
• 108
• 109
• 110
• 111
• 112
• 113
• 114
• 115
• 116
• 117
• 118
• 119
• 120
• 121
• 122
• 123
• 124
• 125
• 126
• 127
• 128
• 129
• 130
• 131
• 132
• 133
• 134
• 135
• 136
• 137
• 138
• 139
• 140
• 141
• 142
• 143
• 144
• 145
• 146
• 147
• 148
• 149
• 150
• 151
• 152
• 153
• 154
• 155
• 156
• 157
• 158
• 159
• 160
• 161
• 162
• 163
• 164
• 165
• 166
• 167
• 168
• 169
• 170

3. 实例

package hssf.sheet.cell;

import java.io.BufferedOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.util.Calendar; import java.util.Date;

import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.CellType; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook;

public class ExportDataCell {

public static void main(String[] args) throws Exception { File file = new File("C:\Users\Administrator\Desktop\test.xls"); if (file.exists()) { file.delete(); } BufferedOutputStream out = null; try { out = new BufferedOutputStream(new FileOutputStream("C:\Users\Administrator\Desktop\test.xls")); exportExcel(out); } finally { out.close(); } }

private static void exportExcel(BufferedOutputStream out) throws IOException { Workbook wb = new HSSFWorkbook(); //Workbook wb = new XSSFWorkbook(); Sheet sheet = wb.createSheet("各种类型单元格");

  sheet.createRow(0).createCell(0).setCellValue(1.1);
  sheet.createRow(1).createCell(0).setCellValue(new Date());
  sheet.createRow(2).createCell(0).setCellValue(Calendar.getInstance());
  sheet.createRow(3).createCell(0).setCellValue("字符串");
  sheet.createRow(4).createCell(0).setCellValue(true);
  sheet.createRow(5).createCell(0).setCellType(CellType.ERROR);

  wb.write(out);

} }

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45