springboot读取jar包资源文件文件

先修改pom.xml文件.使打包后的jar包含你的资源文件

 

在pom.xml文件下的build选项中的src/main/resources的目录下 添加配置

<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.css</include>
                    <include>**/*.js</include>
                    <include>**/*.html</include><include>template/*.xlsx</include>                </includes><filtering>false</filtering></resource></resources></build>
2:读取资源文件到硬盘,然后使用

@javax.annotation.Resource
private ResourceLoader resourceLoader;

String rootPath = "/home";
String configFilePath = rootPath + "/template/template.xlsx";
File configFile = new File(configFilePath);
if (!configFile.exists()) {
log.info("模板文件({})不存在,开始从resources里复制." + configFilePath);
copyResourceFile("classpath:/template/template.xlsx", configFilePath);
}

public void copyResourceFile(String source, String target) throws IOException {
Resource resource = resourceLoader.getResource("classpath:" + source);
InputStream input = resource.getInputStream();
File targetFile = new File(target);
FileUtils.copyInputStreamToFile(input, targetFile);
}