您的位置：首页 > Web前端 > HTML

Excel转Html

2015-10-29 11:53 831 查看

原文链接：https://www.geek-share.com/detail/2657090781.html

项目结构：

这是一个maven项目，主函数在Client类里面

当运行程序的后，控制台情况：

当我们刷新了test.html文件后，用浏览器打开效果：

说一下这个过程的设计思路：

1.读取excel文件

2.利用velocity模板工具把读取的内容渲染到html里面

整个过程就两个步骤，是不是非常简单。

当我们在把这两个过程再细化一下，思路就更加清晰明了了。

1.1.怎样读取或者写入Excel文件呢？

java的poi技术读，写Excel[2003-2007,2010]

2.1.怎样使用velocity模板工具呢？

apache的开源项目-模板引擎(Velocity)_学习了两天就上手啦_源码下载

有了上面1.1和2.1的基础，现在我们要做的工作，就是把他们串起来，就实现了Excel转Html

为了自己以后一看源码就知道怎样做，我习惯贴源码出来。当然还会有源码下载的（在文章末尾）。

===============================================

源码部分：

===============================================

/excel2html/src/main/java/com/b510/excel/client/Client.java

1 package com.b510.excel.client;
2
3 import java.util.List;
4
5 import com.b510.excel.common.Common;
6 import com.b510.excel.reader.ReadExcel;
7 import com.b510.excel.vo.Student;
8 import com.b510.excel.writer.WriteHtml;
9
10 public class Client {
11
12     public static void main(String[] args) throws Exception {
13         String excel2010 = Common.STUDENT_INFO_XLSX_PATH;
14         // read the 2010 excel
15         List<Student> list1 = new ReadExcel().readExcel(excel2010);
16         if (list1 != null && list1.size() > 0) {
17             for (Student student : list1) {
18                 System.out.println("No. : " + student.getNo() + ", name : " + student.getName() + ", age : " + student.getAge() + ", score : " + student.getScore());
19             }
20             System.out.println("begin to write into html file");
21             WriteHtml.write(list1);
22         }
23
24     }
25 }

/excel2html/src/main/java/com/b510/excel/common/Common.java

1 package com.b510.excel.common;
2
3 public class Common {
4
5     public static final String OFFICE_EXCEL_2010_POSTFIX = "xlsx";
6
7     public static final String EMPTY = "";
8     public static final String POINT = ".";
9     public static final String STUDENT_INFO_XLSX_PATH = "/student_info" + POINT + OFFICE_EXCEL_2010_POSTFIX;
10     public static final String NOT_EXCEL_FILE = " : Not the Excel file!";
11     public static final String PROCESSING = "Processing...";
12
13     public static final String HTML_FILE = "test.html";
14     public static final String TEST_HTML_FILE = "./test.html";
15

3ff7
16 }

/excel2html/src/main/java/com/b510/excel/reader/ReadExcel.java

1 package com.b510.excel.reader;
2
3 import java.io.IOException;
4 import java.io.InputStream;
5 import java.util.ArrayList;
6 import java.util.List;
7
8 import org.apache.poi.hssf.usermodel.HSSFCell;
9 import org.apache.poi.hssf.usermodel.HSSFRow;
10 import org.apache.poi.hssf.usermodel.HSSFSheet;
11 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
12 import org.apache.poi.xssf.usermodel.XSSFCell;
13 import org.apache.poi.xssf.usermodel.XSSFRow;
14 import org.apache.poi.xssf.usermodel.XSSFSheet;
15 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
16
17 import com.b510.excel.common.Common;
18 import com.b510.excel.util.Util;
19 import com.b510.excel.vo.Student;
20
21 public class ReadExcel {
22
23     /**
24      * read the Excel file
25      * @param path  the path of the Excel file
26      * @return
27      * @throws IOException
28      */
29     public List<Student> readExcel(String path) throws IOException {
30         if (path == null || Common.EMPTY.equals(path)) {
31             return null;
32         } else {
33             String postfix = Util.getPostfix(path);
34             if (!Common.EMPTY.equals(postfix)) {
35                 if (Common.OFFICE_EXCEL_2010_POSTFIX.equals(postfix)) {
36                     return readXlsx(path);
37                 }
38             } else {
39                 System.out.println(path + Common.NOT_EXCEL_FILE);
40             }
41         }
42         return null;
43     }
44
45     /**
46      * Read the Excel 2010
47      * @param path the path of the excel file
48      * @return
49      * @throws IOException
50      */
51     @SuppressWarnings("resource")
52     public List<Student> readXlsx(String path) throws IOException {
53         System.out.println(Common.PROCESSING + path);
54         InputStream is = this.getClass().getResourceAsStream(path);
55         XSSFWorkbook xssfWorkbook = new XSSFWorkbook(is);
56         Student student = null;
57         List<Student> list = new ArrayList<Student>();
58         // Read the Sheet
59         for (int numSheet = 0; numSheet < xssfWorkbook.getNumberOfSheets(); numSheet++) {
60             XSSFSheet xssfSheet = xssfWorkbook.getSheetAt(numSheet);
61             if (xssfSheet == null) {
62                 continue;
63             }
64             // Read the Row
65             for (int rowNum = 1; rowNum <= xssfSheet.getLastRowNum(); rowNum++) {
66                 XSSFRow xssfRow = xssfSheet.getRow(rowNum);
67                 if (xssfRow != null) {
68                     student = new Student();
69                     XSSFCell no = xssfRow.getCell(0);
70                     XSSFCell name = xssfRow.getCell(1);
71                     XSSFCell age = xssfRow.getCell(2);
72                     XSSFCell score = xssfRow.getCell(3);
73                     student.setNo(getValue(no));
74                     student.setName(getValue(name));
75                     student.setAge(getValue(age));
76                     student.setScore(Float.valueOf(getValue(score)));
77                     list.add(student);
78                 }
79             }
80         }
81         return list;
82     }
83
84     /**
85      * Read the Excel 2003-2007
86      * @param path the path of the Excel
87      * @return
88      * @throws IOException
89      */
90     @SuppressWarnings("resource")
91     public List<Student> readXls(String path) throws IOException {
92         System.out.println(Common.PROCESSING + path);
93         InputStream is = this.getClass().getResourceAsStream(path);
94         HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
95         Student student = null;
96         List<Student> list = new ArrayList<Student>();
97         // Read the Sheet
98         for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) {
99             HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
100             if (hssfSheet == null) {
101                 continue;
102             }
103             // Read the Row
104             for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
105                 HSSFRow hssfRow = hssfSheet.getRow(rowNum);
106                 if (hssfRow != null) {
107                     student = new Student();
108                     HSSFCell no = hssfRow.getCell(0);
109                     HSSFCell name = hssfRow.getCell(1);
110                     HSSFCell age = hssfRow.getCell(2);
111                     HSSFCell score = hssfRow.getCell(3);
112                     student.setNo(getValue(no));
113                     student.setName(getValue(name));
114                     student.setAge(getValue(age));
115                     student.setScore(Float.valueOf(getValue(score)));
116                     list.add(student);
117                 }
118             }
119         }
120         return list;
121     }
122
123     @SuppressWarnings("static-access")
124     private String getValue(XSSFCell xssfRow) {
125         if (xssfRow.getCellType() == xssfRow.CELL_TYPE_BOOLEAN) {
126             return String.valueOf(xssfRow.getBooleanCellValue());
127         } else if (xssfRow.getCellType() == xssfRow.CELL_TYPE_NUMERIC) {
128             return String.valueOf(xssfRow.getNumericCellValue());
129         } else {
130             return String.valueOf(xssfRow.getStringCellValue());
131         }
132     }
133
134     @SuppressWarnings("static-access")
135     private String getValue(HSSFCell hssfCell) {
136         if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
137             return String.valueOf(hssfCell.getBooleanCellValue());
138         } else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
139             return String.valueOf(hssfCell.getNumericCellValue());
140         } else {
141             return String.valueOf(hssfCell.getStringCellValue());
142         }
143     }
144 }

/excel2html/src/main/java/com/b510/excel/util/Util.java

1 package com.b510.excel.util;
2
3 import com.b510.excel.common.Common;
4
5 public class Util {
6
7     /**
8      * get postfix of the path
9      * @param path
10      * @return
11      */
12     public static String getPostfix(String path) {
13         if (path == null || Common.EMPTY.equals(path.trim())) {
14             return Common.EMPTY;
15         }
16         if (path.contains(Common.POINT)) {
17             return path.substring(path.lastIndexOf(Common.POINT) + 1, path.length());
18         }
19         return Common.EMPTY;
20     }
21 }

/excel2html/src/main/java/com/b510/excel/vm/student.vm

1 <!DOCTYPE html>
2 <html>
3 <title>HTML Tutorial</title>
4 <style>
5 table {
6     width:100%;
7 }
8 table, th, td {
9     border: 1px solid black;
10     border-collapse: collapse;
11 }
12 th, td {
13     padding: 5px;
14     text-align: left;
15 }
16 table#t01 tr:nth-child(even) {
17     background-color: #eee;
18 }
19 table#t01 tr:nth-child(odd) {
20    background-color:#fff;
21 }
22 table#t01 th    {
23     background-color: black;
24     color: white;
25 }
26 </style>
27 <body>
28
29   <table id="t01">
30   <tr>
31     <th>S/N</th>
32     <th>ID</th>
33     <th>Name</th>
34     <th>Age</th>
35     <th>Score</th>
36   </tr>
37 #set( $count = 1 )
38 #foreach( $student in $students)
39      <tr>
40         <td>$count</td>
41         <td>$student.no</td>
42         <td>$student.name</td>
43         <td>$student.age</td>
44         <td>$student.score</td>
45       </tr>
46     #set( $count = $count + 1 )
47 #end
48 </table>
49 </body>
50 </html>

/excel2html/src/main/java/com/b510/excel/vo/Student.java

1 package com.b510.excel.vo;
2
3 public class Student {
4
5     private Integer id;
6     private String no;
7     private String name;
8     private String age;
9     private float score;
10
11     public Integer getId() {
12         return id;
13     }
14
15     public void setId(Integer id) {
16         this.id = id;
17     }
18
19     public String getNo() {
20         return no;
21     }
22
23     public void setNo(String no) {
24         this.no = no;
25     }
26
27     public String getName() {
28         return name;
29     }
30
31     public void setName(String name) {
32         this.name = name;
33     }
34
35     public String getAge() {
36         return age;
37     }
38
39     public void setAge(String age) {
40         this.age = age;
41     }
42
43     public float getScore() {
44         return score;
45     }
46
47     public void setScore(float score) {
48         this.score = score;
49     }
50
51 }

/excel2html/src/main/java/com/b510/excel/writer/WriteHtml.java

1 package com.b510.excel.writer;
2
3 import java.io.File;
4 import java.io.FileWriter;
5 import java.io.StringWriter;
6 import java.util.List;
7
8 import org.apache.velocity.Template;
9 import org.apache.velocity.VelocityContext;
10 import org.apache.velocity.app.VelocityEngine;
11
12 import com.b510.excel.common.Common;
13 import com.b510.excel.vo.Student;
14
15 public class WriteHtml {
16
17     private static String createCode(String fileVMPath, List<Student> students) throws Exception {
18         VelocityEngine velocityEngine = new VelocityEngine();
19         velocityEngine.setProperty("input.encoding", "UTF-8");
20         velocityEngine.setProperty("output.encoding", "UTF-8");
21         velocityEngine.init();
22         Template template = velocityEngine.getTemplate(fileVMPath);
23         VelocityContext velocityContext = new VelocityContext();
24         velocityContext.put("students", students);
25         StringWriter stringWriter = new StringWriter();
26         template.merge(velocityContext, stringWriter);
27         return stringWriter.toString();
28     }
29
30     public static void write(List<Student> students) throws Exception {
31         System.out.println("write begin");
32         File file = new File(Common.TEST_HTML_FILE);
33         FileWriter fw = new FileWriter(file);
34         fw.write(createCode("./src/main/java/com/b510/excel/vm/student.vm", students));
35         fw.flush();
36         fw.close();
37         System.out.println("write end. Refresh the project before seeing the excel2html/" + Common.HTML_FILE);
38     }
39 }

/excel2html/pom.xml

1 <?xml version="1.0"?>
2 <project
3     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
4     xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
5     <modelVersion>4.0.0</modelVersion>
6
7     <groupId>hongten.exl2html</groupId>
8     <artifactId>excel2html</artifactId>
9     <version>0.0.1</version>
10
11     <name>excel2html</name>
12     <url>http://maven.apache.org</url>
13
14     <properties>
15         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
16     </properties>
17
18     <dependencies>
19         <dependency>
20             <groupId>junit</groupId>
21             <artifactId>junit</artifactId>
22             <version>3.8.1</version>
23             <scope>test</scope>
24         </dependency>
25
26         <dependency>
27             <groupId>org.apache.poi</groupId>
28             <artifactId>poi</artifactId>
29             <version>3.12</version>
30         </dependency>
31
32         <dependency>
33             <groupId>org.apache.poi</groupId>
34             <artifactId>poi-ooxml</artifactId>
35             <version>3.12</version>
36         </dependency>
37
38         <dependency>
39             <groupId>org.apache.poi</groupId>
40             <artifactId>poi-ooxml-schemas</artifactId>
41             <version>3.12</version>
42         </dependency>
43
44         <dependency>
45             <groupId>velocity</groupId>
46             <artifactId>velocity</artifactId>
47             <version>1.5</version>
48         </dependency>
49
50         <dependency>
51             <groupId>dom4j</groupId>
52             <artifactId>dom4j</artifactId>
53             <version>1.5</version>
54         </dependency>
55
56         <dependency>
57             <groupId>org.apache.xmlbeans</groupId>
58             <artifactId>xmlbeans</artifactId>
59             <version>2.6.0</version>
60         </dependency>
61
62     </dependencies>
63 </project>

源码下载：http://files.cnblogs.com/files/hongten/excel2html.zip

========================================================