大家好，又见面了，我是你们的朋友全栈君。
public R upLoadAccessory(@RequestParam("file")MultipartFile file){
Map<String,Object> map = new HashMap<>();
if (file.isEmpty()) {
return R.ok(map);
}else {
//保存时的文件名
DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
Calendar calendar = Calendar.getInstance();
String dateName = df.format(calendar.getTime())+file.getOriginalFilename();
System.out.println(dateName);
//保存文件的绝对路径
WebApplicationContext webApplicationContext = (WebApplicationContext)SpringContextUtils.applicationContext;
ServletContext servletContext = webApplicationContext.getServletContext();
String realPath = servletContext.getRealPath("/");
String filePath = realPath + "WEB-INF"+File.separator + "classes" + File.separator +"static" + File.separator + "resource" + File.separator+dateName;
System.out.println("绝对路径:"+filePath);
File newFile = new File(filePath);
//MultipartFile的方法直接写文件
try {
//上传文件
file.transferTo(newFile);
//数据库存储的相对路径
String projectPath = servletContext.getContextPath();
HttpServletRequest request = HttpContextUtils.getHttpServletRequest();
String contextpath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+projectPath;
String url = contextpath + "/resource/"+dateName;
System.out.println("相对路径:"+url);
//文件名与文件URL存入数据库表
....
} catch (IllegalStateException | IOException e) {
e.printStackTrace();
}
}
return R.ok(map);
}
2018.5.16 更新: 补充一下工具类
@Component
public class SpringContextUtils implements ApplicationContextAware {
public static ApplicationContext applicationContext;
@Override
public void setApplicationContext(ApplicationContext applicationContext)
throws BeansException {
SpringContextUtils.applicationContext = applicationContext;
}
public static Object getBean(String name) {
return applicationContext.getBean(name);
}
public static <T> T getBean(String name, Class<T> requiredType) {
return applicationContext.getBean(name, requiredType);
}
public static boolean containsBean(String name) {
return applicationContext.containsBean(name);
}
public static boolean isSingleton(String name) {
return applicationContext.isSingleton(name);
}
public static Class<? extends Object> getType(String name) {
return applicationContext.getType(name);
}
}
2019.8.6更新— HttpContextUtils 工具类
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
public class HttpContextUtils {
public static HttpServletRequest getHttpServletRequest() {
return ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
}
}
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