Ueditor與SpringMVC整合

時間 2020-01-20

原文原文鏈接

目的

本文旨在整合百度前端富文本Ueditor與SpringMVC，使用Spring Controller做爲Ueditor的後端，提供上傳圖片等後臺相關的功能，即便用SpringMVC替換官方提供的JSP後臺方式。前端

步驟

建立web工程，本文以maven進行建立和管理，最終目錄結構以下:

建立Ueditor統一後臺Controller服務java

import org.apache.commons.io.FileUtils;
import org.springframework.stereotype.Controller;
import org.springframework.util.ResourceUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
@Controller
@RequestMapping("/ued")
public class UeditorController{
    
    @RequestMapping("/serverUrl")
    @ResponseBody
    public Object test(HttpServletRequest request,
                       @RequestParam(value = "action") String action, 
                       @RequestParam(value = "upfile", required = false) MultipartFile file) throws Exception {
       switch (action) {
           case "config": // 加載返回ueditor配置文件conf/config.json
               return getConfig();
           case "uploadimage": // 上傳圖片
               return uploadImage(request, file);
           case "uploadvideo": // 上傳視頻
               return "視頻處理方法";
           case "uploadfile": // 上傳文件
               return "文件處理方法";
           default:
               return "無效action";
        }
    }
   
    private String getConfig() throws Exception {
        File file = ResourceUtils.getFile("classpath:conf/config.json");
        String json = FileUtils.readFileToString(file, "utf-8");
        return json;
    }
    
    private Map<String, Object> uploadImage(HttpServletRequest request, MultipartFile file) {
        
        String state = "SUCCESS";
        String savedDir = request.getSession().getServletContext().getRealPath("upload");
        String filename = file.getOriginalFilename();
        File filepath = new File(savedDir,filename);
        if (!filepath.getParentFile().exists()) {
            filepath.getParentFile().mkdirs();
        }
        // 寫到服務器路徑下，可擴展，好比上傳到雲端或文件服務器
        file.transferTo(new File(savedDir + File.separator + filename));
        String uploadHttpUrl = "http://localhost:8083/upload"+ File.separator + filename;
        return resultMap(file, state, uploadHttpUrl);
    }
    
    private Map<String, Object> resultMap(MultipartFile file, String state, String uploadHttpUrl) {
        Map<String, Object> resMap = new HashMap<String, Object>();
        resMap.put("state", state);  //"SUCCESS" 表示成功
        resMap.put("title", file.getOriginalFilename());
        resMap.put("original", file.getOriginalFilename());
        resMap.put("type", file.getContentType());
        resMap.put("size", file.getSize());
        resMap.put("url", uploadHttpUrl);
        return resMap;
    }
   
}

資源加載幫助類web

import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.StringUtils;
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
 public class ResourceUtils{
     public static File getFile(String resourceLocation) throws FileNotFoundException {
         Assert.notNull(resourceLocation, "Resource location must not be null");
         if (resourceLocation.startsWith("classpath:")) {
             String path = resourceLocation.substring("classpath:".length());
             String description = "class path resource [" + path + "]";
             ClassLoader cl = ClassUtils.getDefaultClassLoader();
             URL url = cl != null ? cl.getResource(path) : ClassLoader.getSystemResource(path);
             if (url == null) {
                 throw new FileNotFoundException(description + " cannot be resolved to absolute file path because it does not exist");
                 
             }else{
                 return getFile(url, description);
             }
         }else{
             try {
                 return getFile(new URL(resourceLocation));
             }catch (MalformedURLException var5) {
                 return new File(resourceLocation);
             }
         }
     }
     public static File getFile(URL resourceUrl, String description) throws FileNotFoundException {
         Assert.notNull(resourceUrl, "Resource URL must not be null");
         if (!"file".equals(resourceUrl.getProtocol())) {
             throw new FileNotFoundException(description + " cannot be resolved to absolute file path because it does not reside in the file system: " + resourceUrl);
         }else{
             try {
                 return new File(toURI(resourceUrl).getSchemeSpecificPart());
             } catch (URISyntaxException var3) {
                 return new File(resourceUrl.getFile());
             }
         }
     }
     public static URI toURI(URL url) throws URISyntaxException {
         return toURI(url.toString());
     }
     public static URI toURI(String location) throws URISyntaxException {
         return new URI(StringUtils.replace(location, " ", "%20"));
     }
     public static File getFile(URL resourceUrl) throws FileNotFoundException {
         return getFile(resourceUrl, "URL");
     }
 }