1、Excel相关操作代码
1 import java.io.File;
2 import java.io.FileInputStream;
3 import java.io.FileNotFoundException;
4 import java.io.FileOutputStream;
5 import java.io.IOException;
6 import java.lang.reflect.Field;
7 import java.lang.reflect.Method;
8 import java.util.ArrayList;
9 import java.util.List;
10
11 import org.apache.poi.hssf.usermodel.HSSFRow;
12 import org.apache.poi.hssf.usermodel.HSSFSheet;
13 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
14 import org.apache.poi.ss.usermodel.Cell;
15 import org.apache.poi.ss.usermodel.Row;
16 import org.springframework.stereotype.Component;
17
18 /**
19 * @Description:
20 * @author [email protected]
21 * @date 创建时间：2016年12月8日下午2:38:47
22 * @version 1.0
23 */
24 @Component
25 public class ExcelManage {
26 private HSSFWorkbook workbook = null;
27
28 /**
29 * 判断文件是否存在
30 * @param filePath 文件路径
31 * @return
32 */
33 public boolean fileExist(String filePath){
34 boolean flag = false;
35 File file = new File(filePath);
36 flag = file.exists();
37 return flag;
38 }
39
40 /**
41 * 判断文件的sheet是否存在
42 * @param filePath 文件路径
43 * @param sheetName 表格索引名
44 * @return
45 */
46 public boolean sheetExist(String filePath,String sheetName){
47 boolean flag = false;
48 File file = new File(filePath);
49 if(file.exists()){ //文件存在
50 //创建workbook
51 try {
52 workbook = new HSSFWorkbook(new FileInputStream(file));
53 //添加Worksheet（不添加sheet时生成的xls文件打开时会报错)
54 HSSFSheet sheet = workbook.getSheet(sheetName);
55 if(sheet!=null)
56 flag = true;
57 } catch (Exception e) {
58 e.printStackTrace();
59 }
60 }else{ //文件不存在
61 flag = false;
62 }
63 return flag;
64 }
65 /**
66 * 创建新Sheet并写入第一行数据
67 * @param filePath excel的路径
68 * @param sheetName 要创建的表格索引
69 * @param titleRow excel的第一行即表格头
70 * @throws IOException
71 * @throws FileNotFoundException
72 */
73 public void createSheet(String filePath,String sheetName,String titleRow[]) throws FileNotFoundException, IOException{
74 FileOutputStream out = null;
75 File excel = new File(filePath); // 读取文件
76 FileInputStream in = new FileInputStream(excel); // 转换为流
77 workbook = new HSSFWorkbook(in); // 加载excel的 工作目录
78
79 workbook.createSheet(sheetName); // 添加一个新的sheet
80 //添加表头
81 Row row = workbook.getSheet(sheetName).createRow(0); //创建第一行
82 try {
83 for(int i = 0;i < titleRow.length;i++){
84 Cell cell = row.createCell(i);
85 cell.setCellValue(titleRow[i]);
86 }
87 out = new FileOutputStream(filePath);
88 workbook.write(out);
89 }catch (Exception e) {
90 e.printStackTrace();
91 }finally {
92 try {
93 out.close();
94 } catch (IOException e) {
95 e.printStackTrace();
96 }
97 }
98 }
99 /**
100 * 创建新excel.
101 * @param filePath excel的路径
102 * @param sheetName 要创建的表格索引
103 * @param titleRow excel的第一行即表格头
104 */
105 public void createExcel(String filePath,String sheetName,String titleRow[]){
106 //创建workbook
107 workbook = new HSSFWorkbook();
108 //添加Worksheet（不添加sheet时生成的xls文件打开时会报错)
109 workbook.createSheet(sheetName);
110 //新建文件
111 FileOutputStream out = null;
112 try {
113 //添加表头
114 Row row = workbook.getSheet(sheetName).createRow(0); //创建第一行
115 for(int i = 0;i < titleRow.length;i++){
116 Cell cell = row.createCell(i);
117 cell.setCellValue(titleRow[i]);
118 }
119 out = new FileOutputStream(filePath);
120 workbook.write(out);
121 } catch (Exception e) {
122 e.printStackTrace();
123 } finally {
124 try {
125 out.close();
126 } catch (IOException e) {
127 e.printStackTrace();
128 }
129 }
130 }
131 /**
132 * 删除文件.
133 * @param filePath 文件路径
134 */
135 public boolean deleteExcel(String filePath){
136 boolean flag = false;
137 File file = new File(filePath);
138 // 判断目录或文件是否存在
139 if (!file.exists()) {
140 return flag;
141 } else {
142 // 判断是否为文件
143 if (file.isFile()) { // 为文件时调用删除文件方法
144 file.delete();
145 flag = true;
146 }
147 }
148 return flag;
149 }
150 /**
151 * 往excel中写入.
152 * @param filePath 文件路径
153 * @param sheetName 表格索引
154 * @param object
155 */
156 public void writeToExcel(String filePath,String sheetName, Object object,String titleRow[]){
157 //创建workbook
158 File file = new File(filePath);
159 try {
160 workbook = new HSSFWorkbook(new FileInputStream(file));
161 } catch (FileNotFoundException e) {
162 e.printStackTrace();
163 } catch (IOException e) {
164 e.printStackTrace();
165 }
166 FileOutputStream out = null;
167 HSSFSheet sheet = workbook.getSheet(sheetName);
168 // 获取表格的总行数
169 int rowCount = sheet.getLastRowNum() + 1; // 需要加一
170 try {
171 Row row = sheet.createRow(rowCount); //最新要添加的一行
172 //通过反射获得object的字段,对应表头插入
173 // 获取该对象的class对象
174 Class<? extends Object> class_ = object.getClass();
175
176 for(int i = 0;i < titleRow.length;i++){
177 String title = titleRow[i];
178 String UTitle = Character.toUpperCase(title.charAt(0))+ title.substring(1, title.length()); // 使其首字母大写;
179 String methodName = "get"+UTitle;
180 Method method = class_.getDeclaredMethod(methodName); // 设置要执行的方法
181 String data = method.invoke(object).toString(); // 执行该get方法,即要插入的数据
182 Cell cell = row.createCell(i);
183 cell.setCellValue(data);
184 }
185 out = new FileOutputStream(filePath);
186 workbook.write(out);
187 } catch (Exception e) {
188 e.printStackTrace();
189 } finally {
190 try {
191 out.close();
192 } catch (IOException e) {
193 e.printStackTrace();
194 }
195 }
196 }
197 }
2、main方法调用方式
1 public static void main(String[] args) {
2 String filePath = "result/数据汇总.xls";
3 String sheetName = "测试";
4 //Excel文件易车sheet页的第一行
5 String title[] = {"日期", "城市","新发布车源数"};
6 //Excel文件易车每一列对应的数据
7 String titleDate[] = {"date", "city","newPublish"};
8
9 ExcelManage em = new ExcelManage();
10 //判断该名称的文件是否存在
11 boolean fileFlag = em.fileExist(filePath);
12 if(!fileFlag){
13 em.createExcel(filePath,sheetName,title);
14 }
15 //判断该名称的Sheet是否存在
16 boolean sheetFlag = em.sheetExist(filePath,sheetName);
17 //如果该名称的Sheet不存在，则新建一个新的Sheet
18 if(!sheetFlag){
19 try {
20 em.createSheet(filePath,sheetName,title);
21 } catch (FileNotFoundException e) {
22 e.printStackTrace();
23 } catch (IOException e) {
24 e.printStackTrace();
25 }
26 }
27
28 YiCheData user = new YiCheData();
29 user.setDate("206-12-21");
30 user.setCity("北京");
31 user.setNewPublish("5");
32 //写入到excel
33 em.writeToExcel(filePath,sheetName,user,titleDate);
34 }
3、用于测试的bean类
1 public class YiCheData {
2 private String date;
3 private String city;
4 private String newPublish;
5
6 public String getDate() {
7 return date;
8 }
9 public void setDate(String date) {
10 this.date = date;
11 }
12 public String getCity() {
13 return city;
14 }
15 public void setCity(String city) {
16 this.city = city;
17 }
18 public String getNewPublish() {
19 return newPublish;
20 }
21 }
时间： 2024-10-09 22:25:23