我正在尝试通过具有超链接字段的java编写Excel文件。
我是从对象列表中编写它的。请检查我的代码。
当我给出对象列表时它正在工作。它正在写入 xls 文件。
但我也想在其中写入超链接。我应该在以下代码中更改什么？
只需从 exportToExcel 方法开始。
package com.ksh;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import com.ksh.Final.Link;
public class OwnClass {
private static SimpleDateFormat dateTimeFormatter = new SimpleDateFormat("yyyyMMddHHmmss");
@SuppressWarnings({ "unchecked", "rawtypes" })
private static Map<Class<?>, Class<?>> javaBasicObjectTypeMap = new HashMap();
@SuppressWarnings({ "unchecked", "rawtypes" })
private static Map<Class<?>, Class<?>> floatingPointTypeMap = new HashMap();
static
{
javaBasicObjectTypeMap.put(Integer.class, Integer.class);
javaBasicObjectTypeMap.put(Long.class, Long.class);
javaBasicObjectTypeMap.put(Float.class, Float.class);
javaBasicObjectTypeMap.put(Double.class, Double.class);
javaBasicObjectTypeMap.put(BigDecimal.class, BigDecimal.class);
javaBasicObjectTypeMap.put(Character.class, Character.class);
javaBasicObjectTypeMap.put(String.class, String.class);
javaBasicObjectTypeMap.put(Date.class, Date.class);
floatingPointTypeMap.put(Float.class, Float.class);
floatingPointTypeMap.put(Double.class, Double.class);
floatingPointTypeMap.put(BigDecimal.class, BigDecimal.class);
}
@SuppressWarnings("rawtypes")
public static String exportToExcel(List<?> objectList,
ExcelFileParameter config,
Map<String, String> fieldNameTitleMap)throws Exception
{
String filePath = config.getExcelFileAbsolutePath();
if (filePath.isEmpty())
{
filePath = dateTimeFormatter.format(new Date()) + ".xlsx";
}
File excelFile = new File(filePath);
FileOutputStream fos = null;
XSSFWorkbook workBook = new XSSFWorkbook();
XSSFSheet sheet = workBook.createSheet();
List rowlist = convertObjectToRowList(objectList, config, fieldNameTitleMap);
System.out.println("Kshitij : "+rowlist.size()+"Type : ===="+rowlist.get(0).getClass().getName());
for (int i = 0; (rowlist != null) && (i < rowlist.size()); i++)
{
List row = (List)rowlist.get(i);
XSSFRow excelRow = sheet.createRow(i);
for (int j = 0; (row != null) && (j < row.size()); j++)
{
XSSFCell cell = excelRow.createCell(j);
cell.setCellValue((String)row.get(j));
}
}
ByteArrayOutputStream bos = new ByteArrayOutputStream();
workBook.write(bos);
try
{
fos = new FileOutputStream(excelFile);
fos.write(bos.toByteArray());
}
catch (Exception ex)
{
throw ex;
}
finally
{
fos.flush();
fos.close();
}
return excelFile.getAbsolutePath();
}
@SuppressWarnings({ "rawtypes", "unchecked" })
private static List<List<String>> convertObjectToRowList(List<?> objectList,
ExcelFileParameter config,
Map<String, String> fieldNameTitleMap) throws Exception
{
if (objectList == null)
{
throw new Exception("objectList is null!");
}
if (objectList.size() == 0)
{
throw new Exception("objectList is empty!");
}
List rowList = new ArrayList();
Class itemClass = objectList.get(0).getClass();
System.out.println("Object List Type is : "+itemClass.getName());
if (javaBasicObjectTypeMap.containsKey(itemClass))
{
System.out.println("Non Primitive Type From Java Library");
for (Iterator localIterator = objectList.iterator(); localIterator.hasNext(); )
{
Object obj = localIterator.next();
String value = convertFieldValueToString(itemClass, obj, config);
List row = new ArrayList();
row.add(value);
rowList.add(row);
}
}
else
{
System.out.println("User Defined Class Type just got");
List allFields = getFields(itemClass);
Object excelFields = new ArrayList();
List header = new ArrayList();
String fieldName = null;
for (int i = 0; (allFields != null) && (i < allFields.size()); i++)
{
fieldName = ((Field)allFields.get(i)).getName();
if ((fieldNameTitleMap != null) && (fieldNameTitleMap.keySet().size() > 0))
{
if (fieldNameTitleMap.containsKey(fieldName))
{
((List)excelFields).add((Field)allFields.get(i));
header.add((String)fieldNameTitleMap.get(fieldName));
}
}
else
{
((List)excelFields).add((Field)allFields.get(i));
header.add(fieldName);
}
}
rowList.add(header);
for(Object object : objectList)
{
List row = convertToRow(object, config, (List)excelFields);
rowList.add(row);
}
}
return rowList;
}
private static String convertFieldValueToString(Class<?> fieldType,
Object fieldValue,
ExcelFileParameter config) throws Exception
{
if (fieldValue == null)
{
return config.getNullValueStrig();
}
if (fieldType.isAssignableFrom(Date.class))
{
SimpleDateFormat dateTimeFormat = config.getDateTimeFormat();
if (dateTimeFormat == null)
{
return fieldValue.toString();
}
dateTimeFormat.format(fieldValue);
}
if ((fieldType == Float.TYPE) ||
(fieldType == Double.TYPE) ||
(floatingPointTypeMap.containsKey(fieldType)))
{
DecimalFormat decimalFormat = config.getDecimalFormat();
if (decimalFormat == null)
{
return fieldValue.toString();
}
decimalFormat.format(fieldValue);
}
System.out.println("99999999999999999999999999999999999999999 : "+fieldType);
if(fieldType == Link.class)
{
System.out.println("Link Value is Found...");
System.out.println("Field Value : "+fieldValue.toString());
}
return fieldValue.toString();
}
@SuppressWarnings({ "rawtypes", "unchecked" })
private static List<Field> getFields(Class<?> clazz)
{
List list = new ArrayList();
Field[] fieldlist = clazz.getDeclaredFields();
for (int i = 0; (fieldlist != null) && (i < fieldlist.length); i++)
{
Field field = fieldlist[i];
Class type = fieldlist[i].getType();
System.out.println("Type :" +type);
int mod = fieldlist[i].getModifiers();
System.out.println("Mode :" +mod);
if ((!Modifier.isFinal(mod)) && (!Modifier.isStatic(mod)))
{
if (type.isPrimitive())
{
list.add(field);
}
else if (javaBasicObjectTypeMap.containsKey(type))
{
list.add(field);
}
}
}
for(Object object : list)
{
Field field = (Field) object;
System.out.println(field.getName());
}
return list;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
private static List<String> convertToRow( Object object,
ExcelFileParameter config,
List<Field> fieldList )
{
List row = new ArrayList();
for (int i = 0; (fieldList != null) && (i < fieldList.size()); i++)
{
try
{
Field field = (Field)fieldList.get(i);
field.setAccessible(true);
Class fieldType = field.getType();
Object fieldValue = field.get(object);
// System.out.println("Field Type : "+fieldType +"FieldValue : "+fieldValue);
String value = convertFieldValueToString(fieldType, fieldValue, config);
System.out.println("--------------------------------------------------"+value);
row.add(value);
}
catch (Exception ex)
{
row.add("ERROR:" + ex.toString());
}
}
System.out.println("kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk"+row.size());
return row;
}
}
表示将把对象链接写入到excel文件中。它正在工作，但需要编写超链接字段。
最佳答案
基本上，此代码将在单元格中生成超链接:
Workbook wb = new XSSFWorkbook();
CreationHelper createHelper = wb.getCreationHelper();
Sheet sheet = wb.createSheet("AHyperLink");
Cell cell = sheet.createRow(0).createCell(0);
cell.setCellValue("Google");
Hyperlink link = createHelper.createHyperlink(Hyperlink.LINK_URL);
link.setAddress("http://www.google.com/");
cell.setHyperlink(link);
将其放入代码中的一个简单方法是将 URL 模式与在以下位置获取的字段值进行匹配:
XSSFCell cell = excelRow.createCell(j);
cell.setCellValue((String)row.get(j)); // match the result of row.get(j)
如果是 URL，请使用上面的代码添加超链接，如果不是，则只需使用您的代码
*编辑:
使用您的 Link 可能会更好对象来识别链接，您必须以可以使用 Link 的方式重写代码。或String在创建 Cell 时。
关于java - 需要帮助在java中使用超链接字段文件来编写excel，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13230767/