A. java如何读取整个excel文件的内容
在Java中读取Excel文件的内容
在这里，我使用的是一个叫Java Excel API的东西，类似的还有的POI，不过感觉那个
太复杂了点儿。而且jxl对中文的支持相当的好，至少我在用的过程中一点问题没出。
一、下载地址
http://www.andykhan.com/jexcelapi/
二、特性
可以读取Excel 95, 97, 2000文件
可以读或写Excel 97及其以后版本的的公式（不过我发现好像有bug）
生成Excel 97格式的电子表格
支持字体、数字和日期格式化
支持单元格的颜色和阴影
可以编辑现有的文件
三、读文件
//声明一下，记得后面要关闭哦。。
Workbook workbook = null;
try {
workbook = Workbook.getWorkbook(new File("d:\temp\TestRead.xls"));
} catch (Exception e) {
throw new Exception("file to import not found!");
}
Sheet sheet = workbook.getSheet(0);
Cell cell = null;
int columnCount=3;
int rowCount=sheet.getRows();
for (int i = 0; i<rowcount; p="" {
for (int j = 0; j<columncount; p="" {
//注意，这里的两个参数，第一个是表示列的，第二才表示行
cell=sheet.getCell(j, i);
//要根据单元格的类型分别做处理，否则格式化过的内容可能会不正确
if(cell.getType()==CellType.NUMBER){
System.out.print(((NumberCell)cell).getValue());
}
else if(cell.getType()==CellType.DATE){
System.out.print(((DateCell)cell).getDate());
}
else{
System.out.print(cell.getContents());
}
//System.out.print(cell.getContents());
System.out.print("");
}
System.out.print("");
}
//关闭它，否则会有内存泄露
workbook.close();
B. java怎么读取excel文件
import java.io.BufferedInputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.text.DecimalFormat;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Arrays;import java.util.Date;import java.util.List;import org.apache.poi.hssf.usermodel.HSSFCell;import org.apache.poi.hssf.usermodel.HSSFDateUtil;import org.apache.poi.hssf.usermodel.HSSFRow;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.poifs.filesystem.POIFSFileSystem;public class ExcelHandle {public static void main(String[] args) throws Exception {File file = new File("sss.xls");String[][] result = getData(file, 1);int rowLength = result.length;for(int i=0;i<rowLength;i++) {for(int j=0;j<result[i].length;j++) {System.out.print(result[i][j]+"\t\t");}System.out.println();}}/*** 读取Excel的内容，第一维数组存储的是一行中格列的值，二维数组存储的是多少个行* @param file 读取数据的源Excel* @param ignoreRows 读取数据忽略的行数，比喻行头不需要读入 忽略的行数为1* @return 读出的Excel中数据的内容* @throws FileNotFoundException* @throws IOException*/public static String[][] getData(File file, int ignoreRows)throws FileNotFoundException, IOException {List<String[]> result = new ArrayList<String[]>();int rowSize = 0;BufferedInputStream in = new BufferedInputStream(new FileInputStream(file));// 打开HSSFWorkbookPOIFSFileSystem fs = new POIFSFileSystem(in);HSSFWorkbook wb = new HSSFWorkbook(fs);HSSFCell cell = null;for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {HSSFSheet st = wb.getSheetAt(sheetIndex);// 第一行为标题，不取for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {HSSFRow row = st.getRow(rowIndex);if (row == null) {continue;}int tempRowSize = row.getLastCellNum() + 1;if (tempRowSize > rowSize) {rowSize = tempRowSize;}String[] values = new String[rowSize];Arrays.fill(values, "");boolean hasValue = false;for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) {String value = "";cell = row.getCell(columnIndex);if (cell != null) {// 注意：一定要设成这个，否则可能会出现乱码cell.setEncoding(HSSFCell.ENCODING_UTF_16); 3.2已经自动Unicode处理了switch (cell.getCellType()) {case HSSFCell.CELL_TYPE_STRING:value = cell.getStringCellValue();break;case HSSFCell.CELL_TYPE_NUMERIC:if (HSSFDateUtil.isCellDateFormatted(cell)) {Date date = cell.getDateCellValue();if (date != null) {value = new SimpleDateFormat("yyyy-MM-dd").format(date);} else {value = "";}} else {value = new DecimalFormat("0").format(cell.getNumericCellValue());}break;case HSSFCell.CELL_TYPE_FORMULA:// 导入时如果为公式生成的数据则无值if (!cell.getStringCellValue().equals("")) {value = cell.getStringCellValue();} else {value = cell.getNumericCellValue() + "";}break;case HSSFCell.CELL_TYPE_BLANK:break;case HSSFCell.CELL_TYPE_ERROR:value = "";break;case HSSFCell.CELL_TYPE_BOOLEAN:value = (cell.getBooleanCellValue() == true ? "Y": "N");break;default:value = "";}}if (columnIndex == 0 && value.trim().equals("")) {break;}values[columnIndex] = rightTrim(value);hasValue = true;}if (hasValue) {result.add(values);}}}in.close();String[][] returnArray = new String[result.size()][rowSize];for (int i = 0; i < returnArray.length; i++) {returnArray[i] = (String[]) result.get(i);}return returnArray;}/*** 去掉字符串右边的空格* @param str 要处理的字符串* @return 处理后的字符串*/public static String rightTrim(String str) {if (str == null) {return "";}int length = str.length();for (int i = length – 1; i >= 0; i–) {if (str.charAt(i) != 0x20) {break;}length–;}return str.substring(0, length);}}给你个例子代码，应该能帮到你！
C. JAVA如何读取EXCEL文件
简要介绍了开放源码项目Java Excel API,结合示例,详细叙述了有关Excel文件的读取方法,最后给出了一个例程及其运行结果.
D. java如何直接从流中读取excel的文件内容Stream
读取excel一般使用开源工具包来读取的。因为office文件是经过处理的，用流读到的都是乱码。你可以自己从网络“java 去读excel”找些资料，一堆一堆的。而且都封装好了，用起来也方便。我这也有代码。如果你找到的代码都不可用，我再发给你。
E. 如何用JAVA读取EXCEL文件里面的数据
使用poi能解决你的问题或者是import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.IOException;import static java.lang.System.out;public class FileTest {/*** @param args* @throws IOException*/public static void main(String[] args) throws IOException {String string = "";File file = new File("c:" + File.separator + "xxx.xls");FileReader fr = new FileReader(file);BufferedReader br = new BufferedReader(fr);String str;while((str = br.readLine()) != null) {string += str;}out.println(string);}}
F. 如何使用java自动读取web项目中的excel文件
package com.bjhz.gcp.common.util;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.sql.Timestamp;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.HashMap;import java.util.List;import java.util.Locale;import java.util.Map;import org.apache.poi.hssf.usermodel.HSSFCell;import org.apache.poi.hssf.usermodel.HSSFCellStyle;import org.apache.poi.hssf.usermodel.HSSFFont;import org.apache.poi.hssf.usermodel.HSSFRichTextString;import org.apache.poi.hssf.usermodel.HSSFRow;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;/** * * 导出EXCEL * @author Herenqing * */public class WritExcel { public static final Integer WRIT_TITLE = 1; public static final Integer NO_WRIT_TITLE = 0; private static String format = "yyyy-MM-dd HH:mm:ss"; private static String nullDisplay = ""; private List<String> columnName = new ArrayList<String>(); private Map<String, String> columnObject = new HashMap<String, String>(); private String savePath; private OutputStream outputStream;/** * 构造写入EXCEL的路径 * 使用 put 方法创建导出的内容 * 使用 writ 方法将对象写入EXCEL * @param savePath * @throws FileNotFoundException */ public WritExcel(String savePath) { this.savePath = savePath; } /** * 构造写入EXCEL的路径 * 使用 put 方法创建导出的内容 * 使用 writOutputStream 方法将对象写入 HSSFWorkbook * @param savePath * @throws FileNotFoundException */ /*public WritExcel() { }*/ /** * 构建导出顺序及导出字段 * @param key 导出字段名 * @param value 表头 */ public void put(String key,String value) { this.columnName.add(key); this.columnObject.put(key, value); } /** * 写入EXCEL * @param <T> 写入EXCEL的对象类型 * @param objects 写入EXCEL的对象 * @param model 写不写表头 * @throws IOException * @throws InvocationTargetException * @throws IllegalAccessException * @throws IllegalArgumentException */ public <T> void writ(List<T> objects,Integer model) throws IOException, IllegalArgumentException, IllegalAccessException, InvocationTargetException { // 创建一个Excel HSSFWorkbook book = new HSSFWorkbook(); // 创建一个工作簿 HSSFSheet sheet = book.createSheet(); // 设置工作簿的默认列宽 sheet.setDefaultColumnWidth(30); Integer start = 0; if (model == WRIT_TITLE) { HSSFCellStyle titleStyle = buildTitleStyle(book); writExcelTitle(sheet,titleStyle); start = WRIT_TITLE; } HSSFCellStyle columnStyle = buildColumnStyle(book); writExcelColumn(objects,start,sheet,columnStyle); outputStream = new FileOutputStream(savePath); book.write(outputStream); outputStream.close(); } /** * 写入EXCEL * @param <T> 写入EXCEL的对象类型 * @param objects 写入EXCEL的对象 * @param model 写不写表头 * @throws IOException * @throws InvocationTargetException * @throws IllegalAccessException * @throws IllegalArgumentException */ /*public <T> HSSFWorkbook writOutputStream(List<T> objects,Integer model) throws IOException, IllegalArgumentException, IllegalAccessException, InvocationTargetException { // 创建一个Excel HSSFWorkbook book = new HSSFWorkbook(); // 创建一个工作簿 HSSFSheet sheet = book.createSheet(); // 设置工作簿的默认列宽 sheet.setDefaultColumnWidth((short)30); Integer start = 0; if (model == WRIT_TITLE) { HSSFCellStyle titleStyle = buildTitleStyle(book); writExcelTitle(sheet,titleStyle); start = WRIT_TITLE; } HSSFCellStyle columnStyle = buildColumnStyle(book); writExcelColumn(objects,start,sheet,columnStyle); return book; }*/ /** * 使用内容样式 * @return */ private HSSFCellStyle buildColumnStyle(HSSFWorkbook book){ // 设置样式 HSSFCellStyle columnStyle = book.createCellStyle(); //titleStyle.setFillForegroundColor(HSSFColor.SKY_BLUE.index); //titleStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); //titleStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); columnStyle.setLeftBorderColor(HSSFCellStyle.BORDER_THIN); columnStyle.setRightBorderColor(HSSFCellStyle.BORDER_THIN); columnStyle.setTopBorderColor(HSSFCellStyle.BORDER_THIN); columnStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 设置字体 HSSFFont font = book.createFont(); //font.setColor(HSSFColor.VIOLET.index); //font.setFontHeight((short)12); //font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); // 把字体应用到当前样式 columnStyle.setFont(font); return columnStyle; }/** * 使用表头样式 */ private HSSFCellStyle buildTitleStyle(HSSFWorkbook book){ // 设置样式 HSSFCellStyle titleStyle = book.createCellStyle(); //titleStyle.setFillForegroundColor(HSSFColor.SKY_BLUE.index); //titleStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); //titleStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); titleStyle.setLeftBorderColor(HSSFCellStyle.BORDER_THIN); titleStyle.setRightBorderColor(HSSFCellStyle.BORDER_THIN); titleStyle.setTopBorderColor(HSSFCellStyle.BORDER_THIN); titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 设置字体 HSSFFont font = book.createFont(); //font.setColor(HSSFColor.VIOLET.index); //font.setFontHeight((short)12); font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); // 把字体应用到当前样式 titleStyle.setFont(font); return titleStyle; } /** * 写入表头 */ private void writExcelTitle(HSSFSheet sheet,HSSFCellStyle titleStyle) throws IOException { // 表头 HSSFRow title = sheet.createRow(0); for (Integer i = 0; i < columnName.size(); i++) { HSSFCell cell = title.createCell(i); cell.setCellStyle(titleStyle); HSSFRichTextString value = new HSSFRichTextString(columnObject.get(columnName.get(i))); cell.setCellValue(value); } } /** * 写入内容 * @throws InvocationTargetException * @throws IllegalAccessException * @throws IllegalArgumentException */ private <T> void writExcelColumn(List<T> objects,Integer start,HSSFSheet sheet,HSSFCellStyle titleStyle) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException{ for (int i = 0; i < objects.size(); i++) { Object object = objects.get(i); Class<?> cls = object.getClass(); HSSFRow column = sheet.createRow(start); for (int j = 0; j < columnName.size(); j++) { try { Method method = cls.getMethod(getMethod(columnName.get(j))); Object invokeResult = method.invoke(object); String result = returnTypeResult(invokeResult); HSSFCell cell = column.createCell(j); cell.setCellStyle(titleStyle); HSSFRichTextString value = new HSSFRichTextString(result); cell.setCellValue(value); } catch (NoSuchMethodException e) { continue; } } start++; } } /** * 构建get方法 */ private static String getMethod(String fieldName){ return "get"+fieldName.substring(0,1).toUpperCase(Locale.CHINA)+fieldName.substring(1); }private static String returnTypeResult(Object object){ if (object == null) { return nullDisplay; } if (object.getClass().getName().equals("java.util.Date")) { return formatDate(object); }else if (object.getClass().getName().equals("java.sql.Timestamp")) { Timestamp timestamp = Timestamp.valueOf(object.toString()); Date date = timestamp; return formatDate(date); }else { return object.toString(); } } /** * formatDate */ private static String formatDate(Object date) { return new SimpleDateFormat(format).format(date); }}
G. java中怎么读取excel文件
package com.jqgj.test;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.text.DecimalFormat;import java.util.ArrayList;import java.util.List;import org.apache.commons.io.FilenameUtils;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.ss.usermodel.Cell;import org.apache.poi.ss.usermodel.CellValue;import org.apache.poi.ss.usermodel.DateUtil;import org.apache.poi.ss.usermodel.FormulaEvaluator;import org.apache.poi.ss.usermodel.Row;import org.apache.poi.ss.usermodel.Sheet;import org.apache.poi.ss.usermodel.Workbook;import org.apache.poi.xssf.usermodel.XSSFWorkbook;public class ImportNameTest {/*** Excel 2003*/private final static String XLS = "xls";/*** Excel 2007*/private final static String XLSX = "xlsx";/*** 分隔符*/private final static String SEPARATOR = "|";/*** 由Excel文件的Sheet导出至List* * @param file* @param sheetNum* @return*/public static List<String> exportListFromExcel(File file, int sheetNum)throws IOException {return exportListFromExcel(new FileInputStream(file),FilenameUtils.getExtension(file.getName()), sheetNum);}/*** 由Excel流的Sheet导出至List* * @param is* @param extensionName* @param sheetNum* @return* @throws IOException*/public static List<String> exportListFromExcel(InputStream is,String extensionName, int sheetNum) throws IOException {Workbook workbook = null;if (extensionName.toLowerCase().equals(XLS)) {workbook = new HSSFWorkbook(is);} else if (extensionName.toLowerCase().equals(XLSX)) {workbook = new XSSFWorkbook(is);}return exportListFromExcel(workbook, sheetNum);}/*** 由指定的Sheet导出至List* * @param workbook* @param sheetNum* @return* @throws IOException*/private static List<String> exportListFromExcel(Workbook workbook,int sheetNum) {Sheet sheet = workbook.getSheetAt(sheetNum);// 解析公式结果FormulaEvaluator evaluator = workbook.getCreationHelper().createFormulaEvaluator();List<String> list = new ArrayList<String>();int minRowIx = sheet.getFirstRowNum();int maxRowIx = sheet.getLastRowNum();for (int rowIx = minRowIx; rowIx <= maxRowIx; rowIx++) {Row row = sheet.getRow(rowIx);StringBuilder sb = new StringBuilder();short minColIx = row.getFirstCellNum();short maxColIx = row.getLastCellNum();for (short colIx = minColIx; colIx <= maxColIx; colIx++) {Cell cell = row.getCell(new Integer(colIx));CellValue cellValue = evaluator.evaluate(cell);if (cellValue == null) {continue;}// 经过公式解析，最后只存在Boolean、Numeric和String三种数据类型，此外就是Error了// 其余数据类型，根据官方文档，完全可以忽略http://poi.apache.org/spreadsheet/eval.htmlswitch (cellValue.getCellType()) {case Cell.CELL_TYPE_BOOLEAN:sb.append(SEPARATOR + cellValue.getBooleanValue());break;case Cell.CELL_TYPE_NUMERIC:// 这里的日期类型会被转换为数字类型，需要判别后区分处理if (DateUtil.isCellDateFormatted(cell)) {sb.append(SEPARATOR + cell.getDateCellValue());} else {//把手机号码转换为字符串DecimalFormat df = new DecimalFormat("#");sb.append(SEPARATOR + df.format(cellValue.getNumberValue()));}break;case Cell.CELL_TYPE_STRING:sb.append(SEPARATOR + cellValue.getStringValue());break;case Cell.CELL_TYPE_FORMULA:break;case Cell.CELL_TYPE_BLANK:break;case Cell.CELL_TYPE_ERROR:break;default:break;}}list.add(sb.toString());}return list;}/*** @param args*/public static void main(String[] args) {String path = "f:\\telName.xlsx";try {List<String> listS= exportListFromExcel(new File(path),0);for(int i=0;i<listS.size();i++){System.out.println(listS.get(i));}} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}
H. JAVA读取EXCEL文件
相关功能代码比较多 贴出来不是很方便 我跟你说一下思路吧首先是用到的工具是poi 这个你可以去官网载一个其次 你要注意区分你的excel 是旧的还是新的 office 07版之前和07版之后的 读取的类不一样把握住这2点 差不多就OK了大体的读取流程是读取workbook -> sheet -> row -> col
I. Java中如何读取excel文件内容并且将内容以表格的形式显示在窗体里
这个设计的内容如下：
PoI技术，将表格数据解析存储到数据库
数据显示，jqGrid这些专业的图表数据显示插件可以完成，当然也可以在JSP页面用普通的<table>标签实现
未经允许不得转载：山九号 » javaexcel文件读取|java如何读取整个excel文件的内容
