Springboot 는 POI 를 사용 하여 Excel 파일 예제 내 보 내기
헤더 정보 만 들 기
표 두 정 보 는 표 두 구조 와 정렬 을 자동 으로 생 성 하 는 데 사용 된다.
public class ExcelHeader implements Comparable<ExcelHeader>{
/**
* excel
*/
private String title;
/**
*
*/
private int order;
/**
*
*/
private String methodName;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public int getOrder() {
return order;
}
public void setOrder(int order) {
this.order = order;
}
public String getMethodName() {
return methodName;
}
public void setMethodName(String methodName) {
this.methodName = methodName;
}
public int compareTo(ExcelHeader o) {
return order>o.order?1:(order<o.order?-1:0);
}
public ExcelHeader(String title, int order, String methodName) {
super();
this.title = title;
this.order = order;
this.methodName = methodName;
}
}
/**
* get annotation， annotation
* Created by on 2016/10/29 0:14.
*/
@Retention(RetentionPolicy.RUNTIME)
public @interface ExcelResources {
/**
*
* @return
*/
String title();
/**
* excel
* @return
*/
int order() default 9999;
}
public class WebDto {
//
private String name;
//
private String url;
//
private String username;
//
private String password;
//
private Integer readCount;
public WebDto(String name, String url, String username, String password, Integer readCount) {
this.name = name;
this.url = url;
this.username = username;
this.password = password;
this.readCount = readCount;
}
public WebDto() {}
@Override
public String toString() {
return "WebDto{" +
"name='" + name + '\'' +
", url='" + url + '\'' +
", username='" + username + '\'' +
", password='" + password + '\'' +
", readCount=" + readCount +
'}';
}
@ExcelResources(title=" ",order=1)
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@ExcelResources(title=" ",order=2)
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
@ExcelResources(title=" ",order=3)
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
@ExcelResources(title=" ",order=4)
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@ExcelResources(title=" ",order=5)
public Integer getReadCount() {
return readCount;
}
public void setReadCount(Integer readCount) {
this.readCount = readCount;
}
}
템 플 릿 파일 가 져 오 는 도구 클래스
public class TemplateFileUtil {
public static FileInputStream getTemplates(String tempName) throws FileNotFoundException {
return new FileInputStream(ResourceUtils.getFile("classpath:excel-templates/"+tempName));
}
}
템 플 릿 도구 클래스
이 를 통 해 표 스타일 등 을 자동 으로 복사 할 수 있 습 니 다.
/**
*
* ， excel sernums
* ， Map， map ， excel #
* datas
* ， styles ，
* defaultStyls ， ， defaultStyles datas
* Created by [email protected] on 2016/10/28 23:38.
*/
public class ExcelTemplate {
/**
*
*/
public final static String DATA_LINE = "datas";
/**
*
*/
public final static String DEFAULT_STYLE = "defaultStyles";
/**
*
*/
public final static String STYLE = "styles";
/**
*
*/
public final static String SER_NUM = "sernums";
private static ExcelTemplate et = new ExcelTemplate();
private Workbook wb;
private Sheet sheet;
/**
*
*/
private int initColIndex;
/**
*
*/
private int initRowIndex;
/**
*
*/
private int curColIndex;
/**
*
*/
private int curRowIndex;
/**
*
*/
private Row curRow;
/**
*
*/
private int lastRowIndex;
/**
*
*/
private CellStyle defaultStyle;
/**
*
*/
private float rowHeight;
/**
*
*/
private Map<Integer,CellStyle> styles;
/**
*
*/
private int serColIndex;
private ExcelTemplate(){
}
public static ExcelTemplate getInstance() {
return et;
}
/**
* classpath
* @param path
* @return
*/
public ExcelTemplate readTemplateByClasspath(String path) {
try {
wb = new HSSFWorkbook(TemplateFileUtil.getTemplates(path));
initTemplate();
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(" ！ ");
}
return this;
}
/**
*
* @param filepath
*/
public void writeToFile(String filepath) {
FileOutputStream fos = null;
try {
fos = new FileOutputStream(filepath);
wb.write(fos);
} catch (FileNotFoundException e) {
e.printStackTrace();
throw new RuntimeException(" ");
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(" :"+e.getMessage());
} finally {
try {
if(fos!=null) fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
*
* @param os
*/
public void wirteToStream(OutputStream os) {
try {
wb.write(os);
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(" :"+e.getMessage());
}
}
/**
*
* @param path
* @return
*/
public ExcelTemplate readTemplateByPath(String path) {
try {
wb = new HSSFWorkbook(TemplateFileUtil.getTemplates(path));
initTemplate();
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(" ！ ");
}
return this;
}
/**
* ， String
* @param value
*/
public void createCell(String value) {
Cell c = curRow.createCell(curColIndex);
setCellStyle(c);
c.setCellValue(value);
curColIndex++;
}
public void createCell(int value) {
Cell c = curRow.createCell(curColIndex);
setCellStyle(c);
c.setCellValue((int)value);
curColIndex++;
}
public void createCell(Date value) {
Cell c = curRow.createCell(curColIndex);
setCellStyle(c);
c.setCellValue(value);
curColIndex++;
}
public void createCell(double value) {
Cell c = curRow.createCell(curColIndex);
setCellStyle(c);
c.setCellValue(value);
curColIndex++;
}
public void createCell(boolean value) {
Cell c = curRow.createCell(curColIndex);
setCellStyle(c);
c.setCellValue(value);
curColIndex++;
}
public void createCell(Calendar value) {
Cell c = curRow.createCell(curColIndex);
setCellStyle(c);
c.setCellValue(value);
curColIndex++;
}
public void createCell(BigInteger value) {
Cell c = curRow.createCell(curColIndex);
setCellStyle(c);
c.setCellValue(value==null?0:value.intValue());
curColIndex++;
}
/**
*
* @param c
*/
private void setCellStyle(Cell c) {
if(styles.containsKey(curColIndex)) {
c.setCellStyle(styles.get(curColIndex));
} else {
c.setCellStyle(defaultStyle);
}
}
/**
* ， ，
*/
public void createNewRow() {
if(lastRowIndex>curRowIndex&&curRowIndex!=initRowIndex) {
sheet.shiftRows(curRowIndex, lastRowIndex, 1,true,true);
lastRowIndex++;
}
curRow = sheet.createRow(curRowIndex);
curRow.setHeightInPoints(rowHeight);
curRowIndex++;
curColIndex = initColIndex;
}
/**
* ，
*/
public void insertSer() {
int index = 1;
Row row = null;
Cell c = null;
for(int i=initRowIndex;i<curRowIndex;i++) {
row = sheet.getRow(i);
c = row.createCell(serColIndex);
setCellStyle(c);
c.setCellValue(index++);
}
}
/**
* map ， Map #
* @param datas
*/
public void replaceFinalData(Map<String,String> datas) {
if(datas==null) return;
for(Row row:sheet) {
for(Cell c:row) {
// if(c.getCellType()!=Cell.CELL_TYPE_STRING) continue;
String str = c.getStringCellValue().trim();
if(str.startsWith("#")) {
if(datas.containsKey(str.substring(1))) {
c.setCellValue(datas.get(str.substring(1)));
}
}
}
}
}
/**
* Properties ， #
* @param prop
*/
public void replaceFinalData(Properties prop) {
if(prop==null) return;
for(Row row:sheet) {
for(Cell c:row) {
// if(c.getCellType()!=Cell.CELL_TYPE_STRING) continue;
String str = c.getStringCellValue().trim();
if(str.startsWith("#")) {
if(prop.containsKey(str.substring(1))) {
c.setCellValue(prop.getProperty(str.substring(1)));
}
}
}
}
}
private void initTemplate() {
sheet = wb.getSheetAt(0);
initConfigData();
lastRowIndex = sheet.getLastRowNum();
curRow = sheet.createRow(curRowIndex);
}
/**
*
*/
private void initConfigData() {
boolean findData = false;
boolean findSer = false;
for(Row row:sheet) {
if(findData) break;
for(Cell c:row) {
// if(c.getCellType()!=Cell.CELL_TYPE_STRING) continue;
String str = c.getStringCellValue().trim();
if(str.equals(SER_NUM)) {
serColIndex = c.getColumnIndex();
findSer = true;
}
if(str.equals(DATA_LINE)) {
initColIndex = c.getColumnIndex();
initRowIndex = row.getRowNum();
curColIndex = initColIndex;
curRowIndex = initRowIndex;
findData = true;
defaultStyle = c.getCellStyle();
rowHeight = row.getHeightInPoints();
initStyles();
break;
}
}
}
if(!findSer) {
initSer();
}
}
/**
*
*/
private void initSer() {
for(Row row:sheet) {
for(Cell c:row) {
// if(c.getCellType()!=Cell.CELL_TYPE_STRING) continue;
String str = c.getStringCellValue().trim();
if(str.equals(SER_NUM)) {
serColIndex = c.getColumnIndex();
}
}
}
}
/**
*
*/
private void initStyles() {
styles = new HashMap<Integer, CellStyle>();
for(Row row:sheet) {
for(Cell c:row) {
// if(c.getCellType()!=Cell.CELL_TYPE_STRING) continue;
String str = c.getStringCellValue().trim();
if(str.equals(DEFAULT_STYLE)) {
defaultStyle = c.getCellStyle();
}
if(str.equals(STYLE)) {
styles.put(c.getColumnIndex(), c.getCellStyle());
}
}
}
}
}
/**
* Excel ， Excel List
* BeanUtils
* ， ExcelReources
* Created by [email protected] on 2016/10/29 0:15.
*/
public class ExcelUtil {
private static ExcelUtil eu = new ExcelUtil();
private ExcelUtil(){}
public static ExcelUtil getInstance() {
return eu;
}
/**
* Excel
* @param template
* @param objs
* @param clz
* @param isClasspath
* @return
*/
private ExcelTemplate handlerObj2Excel (String template, List objs, Class clz, boolean isClasspath) {
ExcelTemplate et = ExcelTemplate.getInstance();
try {
if(isClasspath) {
et.readTemplateByClasspath(template);
} else {
et.readTemplateByPath(template);
}
List<ExcelHeader> headers = getHeaderList(clz);
Collections.sort(headers);
//
et.createNewRow();
for(ExcelHeader eh:headers) {
et.createCell(eh.getTitle());
}
//
for(Object obj:objs) {
et.createNewRow();
for(ExcelHeader eh:headers) {
// Method m = clz.getDeclaredMethod(mn);
// Object rel = m.invoke(obj);
et.createCell(BeanUtils.getProperty(obj,getMethodName(eh)));
}
}
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
return et;
}
/**
*
* @param eh
* @return
*/
private String getMethodName(ExcelHeader eh) {
String mn = eh.getMethodName().substring(3);
mn = mn.substring(0,1).toLowerCase()+mn.substring(1);
return mn;
}
/**
* Excel ， ，
* @param datas
* @param template
* @param os
* @param objs
* @param clz
* @param isClasspath classPath
*/
public void exportObj2ExcelByTemplate(Map<String,String> datas, String template, OutputStream os, List objs, Class clz, boolean isClasspath) {
try {
ExcelTemplate et = handlerObj2Excel(template, objs, clz, isClasspath);
et.replaceFinalData(datas);
et.wirteToStream(os);
os.flush();
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Excel ， ，
* @param datas
* @param template
* @param outPath
* @param objs
* @param clz
* @param isClasspath classPath
*/
public void exportObj2ExcelByTemplate(Map<String,String> datas,String template,String outPath,List objs,Class clz,boolean isClasspath) {
ExcelTemplate et = handlerObj2Excel(template, objs, clz, isClasspath);
et.replaceFinalData(datas);
et.writeToFile(outPath);
}
/**
* Excel ， ， , Properties
* @param prop Properties
* @param template
* @param os
* @param objs
* @param clz
* @param isClasspath classPath
*/
public void exportObj2ExcelByTemplate(Properties prop, String template, OutputStream os, List objs, Class clz, boolean isClasspath) {
ExcelTemplate et = handlerObj2Excel(template, objs, clz, isClasspath);
et.replaceFinalData(prop);
et.wirteToStream(os);
}
/**
* Excel ， ， , Properties
* @param prop Properties
* @param template
* @param outPath
* @param objs
* @param clz
* @param isClasspath classPath
*/
public void exportObj2ExcelByTemplate(Properties prop,String template,String outPath,List objs,Class clz,boolean isClasspath) {
ExcelTemplate et = handlerObj2Excel(template, objs, clz, isClasspath);
et.replaceFinalData(prop);
et.writeToFile(outPath);
}
private Workbook handleObj2Excel(List objs, Class clz) {
Workbook wb = new HSSFWorkbook();
try {
Sheet sheet = wb.createSheet();
Row r = sheet.createRow(0);
List<ExcelHeader> headers = getHeaderList(clz);
Collections.sort(headers);
//
for(int i=0;i<headers.size();i++) {
r.createCell(i).setCellValue(headers.get(i).getTitle());
}
//
Object obj = null;
for(int i=0;i<objs.size();i++) {
r = sheet.createRow(i+1);
obj = objs.get(i);
for(int j=0;j<headers.size();j++) {
r.createCell(j).setCellValue(BeanUtils.getProperty(obj, getMethodName(headers.get(j))));
}
}
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
return wb;
}
/**
* Excel， ， Excel ，
* @param outPath
* @param objs
* @param clz
*/
public void exportObj2Excel(String outPath,List objs,Class clz) {
Workbook wb = handleObj2Excel(objs, clz);
FileOutputStream fos = null;
try {
fos = new FileOutputStream(outPath);
wb.write(fos);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if(fos!=null) fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* Excel， ， Excel ，
* @param os
* @param objs
* @param clz
*/
public void exportObj2Excel(OutputStream os,List objs,Class clz) {
try {
Workbook wb = handleObj2Excel(objs, clz);
wb.write(os);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Excel
* @param path path
* @param clz
* @param readLine ，
* @param tailLine ， ，
* @return
*/
public List<Object> readExcel2ObjsByClasspath(String path,Class clz,int readLine,int tailLine) {
Workbook wb = null;
try {
wb = new HSSFWorkbook(TemplateFileUtil.getTemplates(path));
return handlerExcel2Objs(wb, clz, readLine,tailLine);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* Excel
* @param path path
* @param clz
* @param readLine ，
* @param tailLine ， ，
* @return
*/
public List<Object> readExcel2ObjsByPath(String path,Class clz,int readLine,int tailLine) {
Workbook wb = null;
try {
wb = new HSSFWorkbook(TemplateFileUtil.getTemplates(path));
return handlerExcel2Objs(wb, clz, readLine,tailLine);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* Excel ， 0，
* @param path
* @param clz
* @return
*/
public List<Object> readExcel2ObjsByClasspath(String path,Class clz) {
return this.readExcel2ObjsByClasspath(path, clz, 0,0);
}
/**
* Excel ， 0，
* @param path
* @param clz
* @return
*/
public List<Object> readExcel2ObjsByPath(String path,Class clz) {
return this.readExcel2ObjsByPath(path, clz,0,0);
}
private String getCellValue(Cell c) {
String o = null;
switch (c.getCellType()) {
case Cell.CELL_TYPE_BLANK:
o = ""; break;
case Cell.CELL_TYPE_BOOLEAN:
o = String.valueOf(c.getBooleanCellValue()); break;
case Cell.CELL_TYPE_FORMULA:
o = String.valueOf(c.getCellFormula()); break;
case Cell.CELL_TYPE_NUMERIC:
o = String.valueOf(c.getNumericCellValue()); break;
case Cell.CELL_TYPE_STRING:
o = c.getStringCellValue(); break;
default:
o = null;
break;
}
return o;
}
private List<Object> handlerExcel2Objs(Workbook wb,Class clz,int readLine,int tailLine) {
Sheet sheet = wb.getSheetAt(0);
List<Object> objs = null;
try {
Row row = sheet.getRow(readLine);
objs = new ArrayList<Object>();
Map<Integer,String> maps = getHeaderMap(row, clz);
if(maps==null||maps.size()<=0) throw new RuntimeException(" Excel ， ");
for(int i=readLine+1;i<=sheet.getLastRowNum()-tailLine;i++) {
row = sheet.getRow(i);
Object obj = clz.newInstance();
for(Cell c:row) {
int ci = c.getColumnIndex();
String mn = maps.get(ci).substring(3);
mn = mn.substring(0,1).toLowerCase()+mn.substring(1);
BeanUtils.copyProperty(obj,mn, this.getCellValue(c));
}
objs.add(obj);
}
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
return objs;
}
private List<ExcelHeader> getHeaderList(Class clz) {
List<ExcelHeader> headers = new ArrayList<ExcelHeader>();
Method[] ms = clz.getDeclaredMethods();
for(Method m:ms) {
String mn = m.getName();
if(mn.startsWith("get")) {
if(m.isAnnotationPresent(ExcelResources.class)) {
ExcelResources er = m.getAnnotation(ExcelResources.class);
headers.add(new ExcelHeader(er.title(),er.order(),mn));
}
}
}
return headers;
}
private Map<Integer,String> getHeaderMap(Row titleRow,Class clz) {
List<ExcelHeader> headers = getHeaderList(clz);
Map<Integer,String> maps = new HashMap<Integer, String>();
for(Cell c:titleRow) {
String title = c.getStringCellValue();
for(ExcelHeader eh:headers) {
if(eh.getTitle().equals(title.trim())) {
maps.put(c.getColumnIndex(), eh.getMethodName().replace("get","set"));
break;
}
}
}
return maps;
}
}
템 플 릿 파일 을 만 듭 니 다.다음 그림:
POI 에서 Excel 템 플 릿 파일 내 보 내기
테스트 클래스
@SpringBootTest
@RunWith(SpringRunner.class)
public class ExportExcelTest {
@Test
public void test() throws Exception {
List<WebDto> list = new ArrayList<WebDto>();
list.add(new WebDto(" ", "http://www.zslin.com", "admin", "111111", 555));
list.add(new WebDto(" ", "http://basic.zslin.com", "admin", "111111", 111));
list.add(new WebDto(" ", "http://school.zslin.com", "admin", "222222", 333));
Map<String, String> map = new HashMap<String, String>();
map.put("title", " ");
map.put("total", list.size()+" ");
map.put("date", getDate());
ExcelUtil.getInstance().exportObj2ExcelByTemplate(map, "web-info-template.xls", new FileOutputStream("D:/temp/out.xls"),
list, WebDto.class, true);
}
private String getDate() {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy MM dd ");
return sdf.format(new Date());
}
}
POI Excel 결과 도 내 보 내기
다운로드 주소:Springboot_jb51.rar
이상 이 바로 본 고의 모든 내용 입 니 다.여러분 의 학습 에 도움 이 되 고 저 희 를 많이 응원 해 주 셨 으 면 좋 겠 습 니 다.
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