java读取excel文件(.xls,xlsx,csv)
前提,maven工程通过poi读写excel文件,需要在pom.xml中配置依赖关系:
在<dependencies>中添加如下代码
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.9</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.9</version>
</dependency>
1,页面标签及属性
input[type="button"]{background-color: #71BCF3;color: white;}
<form name="form" id="form" method="post" enctype="multipart/form-data">
<input type="file" name="upload" id="upload"style="display: none;"
onchange="document.form.path.value=this.value" multiple="multiple" accept=".xls,.xlsx,.csv" />
<input name="path" id="path" readonly>
<input type="button" value="医路通数据文件上传" onclick="document.form.upload.click()">
</form>
<input type="button" value="确定" onclick="readFile()">
function readFile(){ var f = document.getElementById("form");
f.action = "<%=request.getContextPath()%>/mcp/MedicalDate/readExls.action?";
f.submit();
}
特别注意 : (一),提交文件标签的数据,一定要用form的action提交,否则有数据缺失 (二),form标签中,必须要有 enctype="multipart/form-data"
2,后台用@RequestParam(value = "upload") MultipartFile upload接文件数据
@RequestMapping("/readExls")
public ModelAndView readExls(HttpServletRequest request, HttpServletResponse response,
@RequestParam(value = "upload") MultipartFile upload) throws IOException
{ String oldFile = upload.getOriginalFilename();
String suffix = oldFile.substring(oldFile.lastIndexOf(".")); log.info("oldFile:"+oldFile);//文件名
log.info("suffix:"+suffix);//文件后缀 InputStream inStream = upload.getInputStream();//文件流,可直接用
}
3,解析xls后缀文件将数据转换成为List<MedicalWhiteListVO>,以便对数据操作
public List<MedicalWhiteListVO> readXls(InputStream inStream) throws IOException
{ InputStream is = inStream;
HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is); List<MedicalWhiteListVO> medicalWhiteListVOs = new ArrayList<MedicalWhiteListVO>();
MedicalWhiteListVO medicalvo = null; // Read the Sheet
HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(0); if (hssfSheet == null) {
//continue;
return medicalWhiteListVOs;
} int lastRowNum = hssfSheet.getLastRowNum(); // Read the Row
for (int rowNum = 1; rowNum <= lastRowNum; rowNum++) { HSSFRow hssfRow = hssfSheet.getRow(rowNum); if (hssfRow != null) {
medicalvo = new MedicalWhiteListVO(); HSSFCell holderMobile = hssfRow.getCell(0);
HSSFCell holderRealName = hssfRow.getCell(1); HSSFCell holderBirthday = hssfRow.getCell(2);
HSSFCell policyApplyDate = hssfRow.getCell(3); medicalvo.setHolderMobile(getValue(holderMobile));
medicalvo.setHolderRealName(getValue(holderRealName)); try
{
medicalvo.setHolderBirthday(getDate(getValue(holderBirthday)));
medicalvo.setPolicyApplyDate(getDate(getValue(policyApplyDate)));
} catch (Exception e)
{
e.printStackTrace();
log.info("**日期格式转换异常*2222***");
} medicalWhiteListVOs.add(medicalvo);
}
}
return medicalWhiteListVOs;
}
public static Date getDate(String date) throws Exception{ Pattern pattern = Pattern.compile("^[0-9]*$");
Matcher matcher = pattern.matcher(date);
//判断是否可以转换成日期
if(StringUtils.isNullOrEmpty(date) || !matcher.matches()){
Date defaultDate = DateUtils.parse("1900-01-01");
System.out.println(DateUtils.format(defaultDate));
return defaultDate;
} Double str = Double.valueOf(date); int numday = (int) Math.round(str); Calendar d = Calendar.getInstance();
d.set(1900, 0, 1);
d.add(Calendar.DAY_OF_MONTH,numday); int year = d.get(Calendar.YEAR);
int month = d.get(Calendar.MONTH) + 1;
int day = d.get(Calendar.DAY_OF_MONTH)-2; String dateStr = year+"-"+month+"-"+day; Date newDate = DateUtils.parse(dateStr); System.out.println(DateUtils.format(newDate)); return newDate;
}
private static String getValue(HSSFCell hssfCell) { if(hssfCell==null){
return "";
} if (hssfCell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
return String.valueOf(hssfCell.getBooleanCellValue());
} else if (hssfCell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
return String.valueOf((int)hssfCell.getNumericCellValue());
}else {
return String.valueOf(hssfCell.getStringCellValue()==null?"":hssfCell.getStringCellValue());
}
}
4,解析xlsx后缀文件将数据转换成功List<MedicalWhiteListVO>,以便对数据操作
public static List<MedicalWhiteListVO> readXlsx(InputStream inStream) throws IOException
{
//InputStream is = new FileInputStream(path); InputStream is = inStream; XSSFWorkbook xssfWorkbook = new XSSFWorkbook(is); List<MedicalWhiteListVO> medicalWhiteListVOs = new ArrayList<MedicalWhiteListVO>();
MedicalWhiteListVO medicalvo = null; // Read the Sheet
XSSFSheet xssfSheet = xssfWorkbook.getSheetAt(0); if (xssfSheet == null) {
return medicalWhiteListVOs;
} // Read the Row
for (int rowNum = 1; rowNum <= xssfSheet.getLastRowNum(); rowNum++) { XSSFRow xssfRow = xssfSheet.getRow(rowNum); if (xssfRow != null) {
medicalvo = new MedicalWhiteListVO(); XSSFCell holderMobile = xssfRow.getCell(0);
XSSFCell holderRealName = xssfRow.getCell(1);
XSSFCell holderBirthday = xssfRow.getCell(2);
XSSFCell policyApplyDate = xssfRow.getCell(3); medicalvo.setHolderMobile(getValue(holderMobile));
medicalvo.setHolderRealName(getValue(holderRealName)); try
{
medicalvo.setHolderBirthday(getDate(getValue(holderBirthday)));
medicalvo.setPolicyApplyDate(getDate(getValue(policyApplyDate)));
} catch (Exception e)
{
e.printStackTrace();
log.info("**日期格式转换异常*2***");
}
medicalWhiteListVOs.add(medicalvo);
}
} return medicalWhiteListVOs;
}
private static String getValue(XSSFCell xssfRow) {
if(xssfRow==null){
return "";
}
if (xssfRow.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
return String.valueOf(xssfRow.getBooleanCellValue());
} else if (xssfRow.getCellType() == Cell.CELL_TYPE_NUMERIC) {
return String.valueOf((int)xssfRow.getNumericCellValue());
}else {
return String.valueOf(xssfRow.getStringCellValue()==null?"":xssfRow.getStringCellValue());
}
}
public static Date getDate(String date) throws Exception{ Pattern pattern = Pattern.compile("^[0-9]*$");
Matcher matcher = pattern.matcher(date);
//判断是否可以转换成日期
if(StringUtils.isNullOrEmpty(date) || !matcher.matches()){
Date defaultDate = DateUtils.parse("1900-01-01");
System.out.println(DateUtils.format(defaultDate));
return defaultDate;
} Double str = Double.valueOf(date); int numday = (int) Math.round(str); Calendar d = Calendar.getInstance();
d.set(1900, 0, 1);
d.add(Calendar.DAY_OF_MONTH,numday); int year = d.get(Calendar.YEAR);
int month = d.get(Calendar.MONTH) + 1;
int day = d.get(Calendar.DAY_OF_MONTH)-2; String dateStr = year+"-"+month+"-"+day; Date newDate = DateUtils.parse(dateStr); System.out.println(DateUtils.format(newDate)); return newDate;
}
4,解析csv后缀文件将数据转换成功List<MedicalWhiteListVO>,以便对数据操作
public static List<MedicalWhiteListVO> readCsv(InputStream inStream) throws IOException
{
List<MedicalWhiteListVO> medicalWhiteListVOs = new ArrayList<MedicalWhiteListVO>();
MedicalWhiteListVO medicalvo = null; try {
//BufferedReader reader=new BufferedReader(new InputStreamReader(new FileInputStream(path),"GBK")); BufferedReader reader=new BufferedReader(new InputStreamReader(inStream,"GBK"));
//换成你的文件名 reader.readLine();//第一行信息,为标题信息,不用,如果需要,注释掉
String line = null;
int num = 0;
while((line=reader.readLine())!=null){
num ++;
String item[] = line.split(",");//CSV格式文件为逗号分隔符文件,这里根据逗号切分 medicalvo = new MedicalWhiteListVO(); medicalvo.setHolderMobile(getValue(item,0));
medicalvo.setHolderRealName(getValue(item,1));
medicalvo.setHolderBirthday(getCsvDate(getValue(item,2)));
medicalvo.setPolicyApplyDate(getCsvDate(getValue(item,3)));
medicalWhiteListVOs.add(medicalvo); } Log.info("**一共行数**:"+num); } catch (Exception e) {
e.printStackTrace();
} return medicalWhiteListVOs;
}
public static String getValue(String[] item,int index){ if(item.length > index){
String value = item[index];
return value;
}
return "";
}
public static Date getCsvDate(String item) throws Exception{ if(item.indexOf("/") > 0){
item = item.replaceAll("/", "-");
}else if(item.indexOf("年") > 0){
item = item.replaceAll("年", "-").replaceAll("月", "-").replaceAll("日","");
} Date birth = DateUtils.parse(item);
Date defaultDate = DateUtils.parse("1900-01-01"); if(birth.getTime() <= defaultDate.getTime()){
return defaultDate;
}
return birth;
}
注意java通过poi编写excel文件,需要工程共引入的jar有:
dom4j-1.6.1.jar
poi-3.9.jar
poi-ooxml-3.9.jar
poi-ooxml-schemas-3.9.jar
xmlbeans-2.3.0.jar
xml-resolver-1.2.jar
xmlschema-core-2.0.2.jar
xstream-1.3.1.jar
this is all over,i hope it helpful for you ,3q~
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