springboot-为内置tomcat设置虚拟目录

需求

项目使用springboot开发，以jar包方式部署。项目中文件上传均保存到D判断下的upload目录下。

在浏览器中输入http://localhost:8080/upload/logo_1.jpg能访问到D盘upload目录下的logo_1.png图片

解决方法

由于使用jar包方式，无法使用为tomcat配置虚拟目录的方式，需为springboot内置tomcat设置虚拟目录。

实现

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;


@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/upload/**").addResourceLocations("file:D:/upload/");       
    }

}

启动项目,在浏览器中输入http://localhost:8080/upload/logo_1.jpg，即可正常访问图片了。

上面的例子中拦截器拦截的请求和文件上传目录均是写死的，可将其放置application.properties配置文件 中， 便于修改。修改后代码如下所示：

application.properties

server.port=8080

#静态资源对外暴露的访问路径
file.staticAccessPath=/upload/**
#文件上传目录
file.uploadFolder=D:\\upload

FileUploadProperteis.java

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

/**
 * 文件上传相关属性
 * @create 2018-04-22 13:58
 **/
@Component
@ConfigurationProperties(prefix = "file")
public class FileUploadProperteis {

    //静态资源对外暴露的访问路径
    private String staticAccessPath;

    //文件上传目录
    private String uploadFolder ;

    public String getStaticAccessPath() {
        return staticAccessPath;
    }

    public void setStaticAccessPath(String staticAccessPath) {
        this.staticAccessPath = staticAccessPath;
    }

    public String getUploadFolder() {
        return uploadFolder;
    }

    public void setUploadFolder(String uploadFolder) {
        this.uploadFolder = uploadFolder;
    }
}

WebMvcConfig.java

import com.lnjecit.springboothelloworld.properties.FileUploadProperteis;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;


@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {

    @Autowired
    private FileUploadProperteis fileUploadProperteis;

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler(fileUploadProperteis.getStaticAccessPath()).addResourceLocations("file:" + fileUploadProperteis.getUploadFolder() + "/");       
    }

}

demo下载地址：https://github.com/linj6/springboot-learn/tree/master/springboot-helloworld

参考资料

1、https://liuyanzhao.com/7599.html