SpringBoot之下載excel模板

@GetMapping(value = "/downloadTemplate")
public void downloadTemplate(HttpServletRequest request, HttpServletResponse response) throws Exception {
    String templatePath = "template/aaa.xlsx";
    String fileName = "凍結名單模板" + new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()) + ".xlsx";
    fileName = new String((fileName).getBytes(), "ISO-8859-1");
    // 清除buffer緩存
    response.reset();
    response.setContentType("content-type:octet-stream;charset=UTF-8");
    response.setHeader("Content-Disposition", "attachment;fileName=" + fileName);

    //文件路徑
    ClassPathResource cpr = new ClassPathResource(templatePath);
    BufferedInputStream inputStream = new BufferedInputStream(cpr.getInputStream());

    ServletOutputStream out = response.getOutputStream();
    int b = 0;
    byte[] buffer = new byte[1024];
    while ((b = inputStream.read(buffer)) != -1) {
        //寫到輸出流(out)中
        out.write(buffer, 0, b);
    }
    inputStream.close();
    if (out != null) {
        out.flush();
        out.close();
    }
}

 

springboot打成jar包時，可能會下載失敗

在pom文件增加xlsx和xls配置

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-resources-plugin</artifactId>
    <executions>
        <execution>
            <id>default-resources</id>
            <phase>validate</phase>
            <goals>
                <goal>copy-resources</goal>
            </goals>
            <configuration>
                <outputDirectory>target/classes</outputDirectory>
                <useDefaultDelimiters>false</useDefaultDelimiters>
                <delimiters>
                    <delimiter>@</delimiter>
                </delimiters>
                <resources>
                    <resource>
                        <directory>src/main/java</directory>
                        <includes>
                            <include>**/*.xml</include>
                        </includes>
                        <filtering>true</filtering>
                    </resource>
                   <resource>
                        <directory>src/main/resources/</directory>
                        <filtering>true</filtering>
                         <excludes>
                             <exclude>**/*.xlsx</exclude>
                             <exclude>**/*.xls</exclude>
                         </excludes>
                        <includes>
                            <include>**/*.yml</include>
                            <include>**/*.xml</include>
                            <include>**/*.properties</include>
                        </includes>
                    </resource>
                    <resource>
                        <directory>src/main/resources/</directory>
                        <filtering>false</filtering>
                        <includes>
                            <include>**/*.xlsx</include>
                            <include>**/*.xls</include>
                        </includes>
                    </resource>
                </resources>
            </configuration>
        </execution>
    </executions>
</plugin>