Excel转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）。
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源码部分：
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/excel2html/src/main/java/com/b510/excel/client/Client.java
package com.b510.excel.client; import java.util.List; import com.b510.excel.common.Common;
import com.b510.excel.reader.ReadExcel;
import com.b510.excel.vo.Student;
import com.b510.excel.writer.WriteHtml; public class Client { public static void main(String[] args) throws Exception {
String excel2010 = Common.STUDENT_INFO_XLSX_PATH;
// read the 2010 excel
List<Student> list1 = new ReadExcel().readExcel(excel2010);
if (list1 != null && list1.size() > 0) {
for (Student student : list1) {
System.out.println("No. : " + student.getNo() + ", name : " + student.getName() + ", age : " + student.getAge() + ", score : " + student.getScore());
}
System.out.println("begin to write into html file");
WriteHtml.write(list1);
} }
}
/excel2html/src/main/java/com/b510/excel/common/Common.java
package com.b510.excel.common;
public class Common {
public static final String OFFICE_EXCEL_2010_POSTFIX = "xlsx";
public static final String EMPTY = "";
public static final String POINT = ".";
public static final String STUDENT_INFO_XLSX_PATH = "/student_info" + POINT + OFFICE_EXCEL_2010_POSTFIX;
public static final String NOT_EXCEL_FILE = " : Not the Excel file!";
public static final String PROCESSING = "Processing...";
public static final String HTML_FILE = "test.html";
public static final String TEST_HTML_FILE = "./test.html";
}
/excel2html/src/main/java/com/b510/excel/reader/ReadExcel.java
package com.b510.excel.reader; import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List; import org.apache.poi.hssf.usermodel.HSSFCell;
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.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook; import com.b510.excel.common.Common;
import com.b510.excel.util.Util;
import com.b510.excel.vo.Student; public class ReadExcel { /**
* read the Excel file
* @param path the path of the Excel file
* @return
* @throws IOException
*/
public List<Student> readExcel(String path) throws IOException {
if (path == null || Common.EMPTY.equals(path)) {
return null;
} else {
String postfix = Util.getPostfix(path);
if (!Common.EMPTY.equals(postfix)) {
if (Common.OFFICE_EXCEL_2010_POSTFIX.equals(postfix)) {
return readXlsx(path);
}
} else {
System.out.println(path + Common.NOT_EXCEL_FILE);
}
}
return null;
} /**
* Read the Excel 2010
* @param path the path of the excel file
* @return
* @throws IOException
*/
@SuppressWarnings("resource")
public List<Student> readXlsx(String path) throws IOException {
System.out.println(Common.PROCESSING + path);
InputStream is = this.getClass().getResourceAsStream(path);
XSSFWorkbook xssfWorkbook = new XSSFWorkbook(is);
Student student = null;
List<Student> list = new ArrayList<Student>();
// Read the Sheet
for (int numSheet = 0; numSheet < xssfWorkbook.getNumberOfSheets(); numSheet++) {
XSSFSheet xssfSheet = xssfWorkbook.getSheetAt(numSheet);
if (xssfSheet == null) {
continue;
}
// Read the Row
for (int rowNum = 1; rowNum <= xssfSheet.getLastRowNum(); rowNum++) {
XSSFRow xssfRow = xssfSheet.getRow(rowNum);
if (xssfRow != null) {
student = new Student();
XSSFCell no = xssfRow.getCell(0);
XSSFCell name = xssfRow.getCell(1);
XSSFCell age = xssfRow.getCell(2);
XSSFCell score = xssfRow.getCell(3);
student.setNo(getValue(no));
student.setName(getValue(name));
student.setAge(getValue(age));
student.setScore(Float.valueOf(getValue(score)));
list.add(student);
}
}
}
return list;
} /**
* Read the Excel 2003-2007
* @param path the path of the Excel
* @return
* @throws IOException
*/
@SuppressWarnings("resource")
public List<Student> readXls(String path) throws IOException {
System.out.println(Common.PROCESSING + path);
InputStream is = this.getClass().getResourceAsStream(path);
HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
Student student = null;
List<Student> list = new ArrayList<Student>();
// Read the Sheet
for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) {
HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
if (hssfSheet == null) {
continue;
}
// Read the Row
for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
HSSFRow hssfRow = hssfSheet.getRow(rowNum);
if (hssfRow != null) {
student = new Student();
HSSFCell no = hssfRow.getCell(0);
HSSFCell name = hssfRow.getCell(1);
HSSFCell age = hssfRow.getCell(2);
HSSFCell score = hssfRow.getCell(3);
student.setNo(getValue(no));
student.setName(getValue(name));
student.setAge(getValue(age));
student.setScore(Float.valueOf(getValue(score)));
list.add(student);
}
}
}
return list;
} @SuppressWarnings("static-access")
private String getValue(XSSFCell xssfRow) {
if (xssfRow.getCellType() == xssfRow.CELL_TYPE_BOOLEAN) {
return String.valueOf(xssfRow.getBooleanCellValue());
} else if (xssfRow.getCellType() == xssfRow.CELL_TYPE_NUMERIC) {
return String.valueOf(xssfRow.getNumericCellValue());
} else {
return String.valueOf(xssfRow.getStringCellValue());
}
} @SuppressWarnings("static-access")
private String getValue(HSSFCell hssfCell) {
if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
return String.valueOf(hssfCell.getBooleanCellValue());
} else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
return String.valueOf(hssfCell.getNumericCellValue());
} else {
return String.valueOf(hssfCell.getStringCellValue());
}
}
}
/excel2html/src/main/java/com/b510/excel/util/Util.java
package com.b510.excel.util;
import com.b510.excel.common.Common;
public class Util {
/**
* get postfix of the path
* @param path
* @return
*/
public static String getPostfix(String path) {
if (path == null || Common.EMPTY.equals(path.trim())) {
return Common.EMPTY;
}
if (path.contains(Common.POINT)) {
return path.substring(path.lastIndexOf(Common.POINT) + 1, path.length());
}
return Common.EMPTY;
}
}
/excel2html/src/main/java/com/b510/excel/vm/student.vm
<!DOCTYPE html>
<html>
<title>HTML Tutorial</title>
<style>
table {
width:100%;
}
table, th, td {
border: 1px solid black;
border-collapse: collapse;
}
th, td {
padding: 5px;
text-align: left;
}
table#t01 tr:nth-child(even) {
background-color: #eee;
}
table#t01 tr:nth-child(odd) {
background-color:#fff;
}
table#t01 th {
background-color: black;
color: white;
}
</style>
<body> <table id="t01">
<tr>
<th>S/N</th>
<th>ID</th>
<th>Name</th>
<th>Age</th>
<th>Score</th>
</tr>
#set( $count = 1 )
#foreach( $student in $students)
<tr>
<td>$count</td>
<td>$student.no</td>
<td>$student.name</td>
<td>$student.age</td>
<td>$student.score</td>
</tr>
#set( $count = $count + 1 )
#end
</table>
</body>
</html>
/excel2html/src/main/java/com/b510/excel/vo/Student.java
package com.b510.excel.vo;
public class Student {
private Integer id;
private String no;
private String name;
private String age;
private float score;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public float getScore() {
return score;
}
public void setScore(float score) {
this.score = score;
}
}
/excel2html/src/main/java/com/b510/excel/writer/WriteHtml.java
package com.b510.excel.writer; import java.io.File;
import java.io.FileWriter;
import java.io.StringWriter;
import java.util.List; import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine; import com.b510.excel.common.Common;
import com.b510.excel.vo.Student; public class WriteHtml { private static String createCode(String fileVMPath, List<Student> students) throws Exception {
VelocityEngine velocityEngine = new VelocityEngine();
velocityEngine.setProperty("input.encoding", "UTF-8");
velocityEngine.setProperty("output.encoding", "UTF-8");
velocityEngine.init();
Template template = velocityEngine.getTemplate(fileVMPath);
VelocityContext velocityContext = new VelocityContext();
velocityContext.put("students", students);
StringWriter stringWriter = new StringWriter();
template.merge(velocityContext, stringWriter);
return stringWriter.toString();
} public static void write(List<Student> students) throws Exception {
System.out.println("write begin");
File file = new File(Common.TEST_HTML_FILE);
FileWriter fw = new FileWriter(file);
fw.write(createCode("./src/main/java/com/b510/excel/vm/student.vm", students));
fw.flush();
fw.close();
System.out.println("write end. Refresh the project before seeing the excel2html/" + Common.HTML_FILE);
}
}
/excel2html/pom.xml
<?xml version="1.0"?>
<project
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion> <groupId>hongten.exl2html</groupId>
<artifactId>excel2html</artifactId>
<version>0.0.1</version> <name>excel2html</name>
<url>http://maven.apache.org</url> <properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties> <dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency> <dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.12</version>
</dependency> <dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.12</version>
</dependency> <dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>3.12</version>
</dependency> <dependency>
<groupId>velocity</groupId>
<artifactId>velocity</artifactId>
<version>1.5</version>
</dependency> <dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.5</version>
</dependency> <dependency>
<groupId>org.apache.xmlbeans</groupId>
<artifactId>xmlbeans</artifactId>
<version>2.6.0</version>
</dependency> </dependencies>
</project>
源码下载：http://files.cnblogs.com/files/hongten/excel2html.zip
========================================================
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========================================================
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