使用微服務的時候往往服務之間調用比較麻煩，spring cloud提供了Feign接口調用，RestTemplate調用的方式
這裡我探討下RestTemplate調用的方式：
服務A:接收三個對象參數這三個參數的是通過數據庫查詢出來的
服務B:要調用服務A 服務B提供了查詢三個參數的方法，後面要使用三個參數
對於服務A,處理的方式有兩中
1. 服務B提供一個Feign接口將查詢三個參數的方法公開，服務A直接引用Feign來查詢參數，服務B只需要將三個查詢關鍵字傳遞過去即可
服務A action
@PostMapping("/import/{busiCode}/{filePath}") public Map<String,String> importExcel(@PathVariable("filePath") String filePath,@PathVariable("busiCode") String busiCode,@RequestBody Map<String, String> params, HttpServletRequest request,HttpServletResponse response) { response.setCharacterEncoding("UTF-8"); UserInfo user = UserUtil.getUser(); return excelService.importExcel(filePath,busiCode,params,user); }服務A service
//引入Feign接口private ExcelFreign excelFreign; public Map<String,String> importExcel(String filePath, String busiCode,Map<String, String> params,UserInfo user ) { Map<String,String> result=new HashMap<String,String>(); excelFreign = SpringTool.getApplicationContext().getBean(ExcelFreign.class); CmdImportConfigDto configDto = excelFreign.getCmdImportConfigByBusiCode(busiCode); CmdImportDto importDto=new CmdImportDto(); importDto.setImportConfigId(configDto.getId()); importDto.setExcelPath(filePath); importDto.setParam(new GsonBuilder().create().toJson(params)); importDto.setLog(""); Long impId=null; try { impId= Long.valueOf(excelFreign.saveCmdImportDto(importDto)); } catch (Exception e1) { e1.printStackTrace(); result.put("error", "保存出現異常"); result.put("message", e1.getMessage()); return result; } try{ excelFreign.updateImportStatus(impId, ImportConstant.ImportStatus.SUBMIT, "提交成功"); }catch(Exception e){ e.printStackTrace(); } ValidateTask validateTask=new ValidateTask(); validateTask.init(impId,filePath, busiCode, params,user); String message; try { message = validateTask.call(); } catch (Exception e) { e.printStackTrace(); result.put("error", "驗證出現異常"); result.put("message", e.getMessage()); return result; } if(message!=null){ result.put("error", "驗證不通過"); result.put("message", message); return result; } PersistTask persistTask=new PersistTask(); persistTask.init(impId,filePath, busiCode, params,user); result.putAll(ImportQueue.submit(persistTask)); return result; }服務B 提供的B-Fegin
@FeignClient(value = "frame-service",path = "/excelApi/v1") public interface ExcelFreign extends ExcelApi { }服務B api層B-api
public interface ExcelApi { /** * 更新狀態* @param impId * @param importType * @param result */ @PostMapping("/updateImportStatus/{impId}/{importType}/{result}") void updateImportStatus(@PathVariable("impId") Long impId, @PathVariable("importType") String importType, @PathVariable("result") String result) throws Exception; /** * 獲取導入配置項* @param busiCode * @return */ @GetMapping("/getImportConfig/{busicode}") CmdImportConfigDto getCmdImportConfigByBusiCode(@PathVariable("busicode") String busiCode); /** * 保存信息* @param importDto * @return */ @PostMapping("/saveImport") String saveCmdImportDto(@RequestBody CmdImportDto importDto); }服務B 實現api接口的action
@RestController @RequestMapping("/excelApi/v1") public class ExcelFeignAction implements ExcelApi { @Autowired private CmdExportService exportService; /** * 獲取導入配置項* @param busiCode * @return */ @GetMapping("/getImportConfig/{busicode}") public CmdImportConfigDto getCmdImportConfigByBusiCode(@PathVariable("busicode") String busiCode){ return cmdImportConfigService.getCmdImportConfigByBusiCode(busiCode); } /** * 更新狀態* @param impId * @param importStatus * @param result */ @PostMapping("/updateImportStatus/{impId}/{importType}/{result}") public void updateImportStatus(@PathVariable("impId") Long impId, @PathVariable("importType") String importStatus, @PathVariable("result") String result) throws Exception{ cmdImportService.updateImportStatus(impId,importStatus,new Date() , result); } /** * 保存信息* @param importDto * @return */ @PostMapping("/saveImport") public String saveCmdImportDto(@RequestBody CmdImportDto importDto){ try{ cmdImportService.saveCmdImportDto(importDto); return importDto.getId(); }catch (Exception e){ e.printStackTrace(); throw new BusinessRuntimeException("系統出現異常"); } } }服務B 調用服務A action層
/** * * @param busicode 導出的業務編碼能確定某個模塊做導出操作* @param values 請求參數* * 通過restTemplate 傳遞複雜參數* @return * 返回文件流讓瀏覽器彈出下載*/ @PostMapping(value = "/export/v3/{busicode}") @ResponseBody public ResponseEntity<byte[]> expDownLoadV3(@PathVariable("busicode") String busicode , @RequestBody Map<String,Object> values, HttpServletRequest request)throws Exception { if(StringUtils.isBlank(busicode)){ throw new BusinessRuntimeException("參數錯誤,請檢查參數是否正確,busicode ?"); } // 獲取執行過程Map map = restTemplate.postForObject("http://" + serviceId + "/excelApi/v1/文件名"/"+busicode,values,Map.class); String path = (String)map.get("filepath"); byte[] excel = FastDFSClient.downloadToBytes(path); CmdExportConfigDto cmdExportConfig = exportService.getCmdExportConfigByBusiCode(busicode); //獲取文件名String fileName = cmdExportConfig.getReportName(); // 獲取文件後綴名String extFileName = path.substring(path.lastIndexOf('.')+1); HttpHeaders headers = new HttpHeaders(); // 獲取用戶瀏覽器的種類對不同的瀏覽器進行編碼處理final String userAgent = request.getHeader("USER-AGENT"); headers.setContentType(MediaType.APPLICATION_OCTET_STREAM); headers.setContentDispositionFormData("attachment", FrameUrlConstants.transFromFileName(userAgent,fileName) + "." + extFileName); return new ResponseEntity<byte[]>(excel,headers,HttpStatus.OK); }2.服務B將查詢出來的參數直接傳遞給服務A
服務A:
/** * 接收參數傳遞* 分別接收下面三種key value的鍵值對* cmdExportConfig:CmdExportConfigDto * exportFieldList:List<CmdExportFieldConfigDto> * params:Map * @param params * @param request * @param response * @return */ @PostMapping("/export/v2") public ResponseEntity exportExcel(@RequestBody Map<String,Object> params,HttpServletRequest request,HttpServletResponse response) { response.setCharacterEncoding("UTF-8"); try { // 將文件的路徑獲取到ObjectMapper mapper = new ObjectMapper(); LinkedHashMap requestParMap = (LinkedHashMap)params.get("cmdExportConfig"); CmdExportConfigDto cmdExportConfigDto = null; List<CmdExportFieldConfigDto> exportFieldList = null; if(requestParMap.size()>0){ cmdExportConfigDto = mapper.convertValue(requestParMap,CmdExportConfigDto.class); } ArrayList arrayList = (ArrayList)params.get("exportFieldList"); if(arrayList.size()>0){ exportFieldList = mapper.convertValue(arrayList, new TypeReference<CmdExportFieldConfigDto>() {}); } Map values = (Map)params.get("params"); String filePath = excelService.exportExcel(cmdExportConfigDto,exportFieldList,params,request.getServletContext().getRealPath("/")); Map<String,String> map = new HashMap<String, String>(); map.put("filepath", filePath); return new ResponseEntity(map,HttpStatus.OK); }catch (IOException e){ throw new RuntimeException("輸出文件出錯"); } }服務B：
/** * * @param busicode 導出的業務編碼能確定某個模塊做導出操作* @param values 請求參數* * 通過restTemplate 傳遞複雜參數* @return * 返回文件流讓瀏覽器彈出下載目前需要解決將字節流響應到瀏覽器的控制台了後面均採用url下載的方式*/ @PostMapping(value = "/export/v3/{busicode}",produces = MediaType.TEXT_PLAIN_VALUE) @ResponseBody public ResponseEntity<byte[]> expDownLoadV3(@PathVariable("busicode") String busicode , @RequestBody Map<String,Object> values, HttpServletRequest request)throws Exception { String busiCode = values.get("busiCode").toString(); if(StringUtils.isBlank(busiCode)){ throw new BusinessRuntimeException("參數錯誤,請檢查參數是否正確,busiCode ?"); } // 獲取執行過程Map map = excuteRestTemplate(busiCode,values); String path = (String)map.get("filepath"); byte[] excel = FastDFSClient.downloadToBytes(path); CmdExportConfigDto cmdExportConfig = exportService.getCmdExportConfigByBusiCode(busiCode); //獲取文件名String fileName = cmdExportConfig.getReportName(); // 獲取文件後綴名String extFileName = path.substring(path.lastIndexOf('.')+1); HttpHeaders headers = new HttpHeaders();erAgent = request.getHeader("USER-AGENT"); headers.setContentType(MediaType.APPLICATION_OCTET_STREAM); headers.setContentDispositionFormData("attachment", FrameUrlConstants.transFromFileName(userAgent,fileName) + "." + extFileName); return new ResponseEntity<byte[]>(excel,headers,HttpStatus.OK); } /** * 執行請求調用* @param busiCode * @param variables * @return */ private Map excuteRestTemplate(String busiCode,Map variables){ String serviceId=""; //查詢導出配置CmdExportConfigDto cmdExportConfig = exportService.getCmdExportConfigByBusiCode(busiCode); serviceId = cmdExportConfig.getSystemType(); if(cmdExportConfig==null){ throw new BusinessRuntimeException("沒有導出配置無法導出"); } //根據導出配置id獲取導出字段信息List<CmdExportFieldConfigDto> exportFieldList = exportService.getAllCmdExportFieldConfigDtoByConfigId(cmdExportConfig.getId()); if(StringUtils.isBlank(serviceId)){ throw new BusinessRuntimeException("未配置導出的服務"); } Map<String, Object> uriVariables = new HashMap<>(); uriVariables.put("cmdExportConfig",cmdExportConfig); uriVariables.put("exportFieldList",exportFieldList); uriVariables.put("params",variables); return restTemplate.postForObject("http://" + serviceId + "/excelService/export/v2",new HttpEntity(uriVariables),Map.class); }設置瀏覽器頭
/** * 根據不同的瀏覽器類型設置下載文件的URL編碼* @param userAgent * @param fileName * @return * @throws Exception */ public static String transFromFileName(String userAgent,String fileName) throws Exception{ String finalFileName = ""; if(StringUtils.contains(userAgent, "MSIE")){//IE瀏覽器finalFileName = URLEncoder.encode(fileName,"UTF-8"); }else if(StringUtils.contains(userAgent, "Mozilla")){//google,火狐瀏覽器finalFileName = new String(fileName.getBytes("GBK"), "ISO8859-1"); }else{ finalFileName = URLEncoder.encode(fileName,"UTF-8");//其他瀏覽器} return finalFileName; }總結
以上所述是小編給大家介紹的Spring cloud restTemplate 傳遞複雜參數的方式(多個對象)，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對武林網網站的支持！