Spring cloud restTemplate 传递复杂参数的方式(多个对象)

使用微服务的时候往往服务之间调用比较麻烦，spring cloud提供了Feign接口调用，RestTemplate调用的方式

这里我探讨下RestTemplate调用的方式：

服务A:接收三个对象参数这三个参数的是通过数据库查询出来的

服务B:要调用服务A 服务B提供了查询三个参数的方法，后面要使用三个参数

对于服务A,处理的方式有两中

1. 服务B提供一个Feign接口将查询三个参数的方法公开，服务A直接引用Feign来查询参数，服务B只需要将三个查询关键字传递过去即可

服务A action

 @PostMapping("/import/{busiCode}/{filePath}") 
 public Map importExcel(@PathVariable("filePath") String filePath,@PathVariable("busiCode") String busiCode,@RequestBody Map params, 
      HttpServletRequest request,HttpServletResponse response) { 
   response.setCharacterEncoding("UTF-8"); 
   UserInfo user = UserUtil.getUser(); 
   return excelService.importExcel(filePath,busiCode,params,user); 
 }

服务A service

//引入Feign接口 
private ExcelFreign excelFreign; 
public Map importExcel(String filePath, String busiCode,Map params,UserInfo user ) { 
    Map result=new HashMap(); 
    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", "保存出现异常"); 
      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", "验证出现异常"); 
      result.put("message", e.getMessage()); 
      return result; 
    } 
    if(message!=null){ 
      result.put("error", "验证不通过"); 
      result.put("message", message); 
      return result; 
    } 
    PersistTask persistTask=new PersistTask(); 
    persistTask.init(impId,filePath, busiCode, params,user); 
    result.putAll(importQueue.submit(persistTask)); 
    return result; 
  }

服务B 提供的B-Fegin

@FeignClient(value = "frame-service",path = "/excelApi/v1") 
public interface ExcelFreign extends ExcelApi { 
}

服务B api层 B-api

public interface ExcelApi { 
 
  @PostMapping("/updateimportStatus/{impId}/{importType}/{result}") 
  void updateimportStatus(@PathVariable("impId") Long impId, @PathVariable("importType") String importType, @PathVariable("result") String result) throws Exception; 
 
  @GetMapping("/getimportConfig/{busicode}") 
  CmdimportConfigDto getCmdimportConfigByBusiCode(@PathVariable("busicode") String busiCode); 
   
  @PostMapping("/saveimport") 
  String saveCmdimportDto(@RequestBody CmdimportDto importDto); 
}

服务B 实现api接口的action

@RestController 
@RequestMapping("/excelApi/v1") 
public class ExcelFeignAction implements ExcelApi { 
@Autowired 
  private CmdExportService exportService; 
  
  @GetMapping("/getimportConfig/{busicode}") 
  public CmdimportConfigDto getCmdimportConfigByBusiCode(@PathVariable("busicode") String busiCode){ 
    return cmdimportConfigService.getCmdimportConfigByBusiCode(busiCode); 
  } 
  
  @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); 
  } 
 
  @PostMapping("/saveimport") 
  public String saveCmdimportDto(@RequestBody CmdimportDto importDto){ 
    try{ 
      cmdimportService.saveCmdimportDto(importDto); 
      return importDto.getId(); 
    }catch (Exception e){ 
      e.printStackTrace(); 
      throw new BusinessRuntimeException("系统出现异常"); 
    } 
  } 
}

服务B 调用服务A action层

 
  @PostMapping(value = "/export/v3/{busicode}") 
  @ResponseBody 
  public ResponseEntity expDownLoadV3(@PathVariable("busicode") String busicode , @RequestBody Map values, HttpServletRequest request)throws Exception { 
   if(StringUtils.isBlank(busicode)){ 
      throw new BusinessRuntimeException("参数错误,请检查参数是否正确,busicode ?"); 
    } 
    // 获取执行过程 
    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); 
    //获取文件名 
    String fileName = cmdExportConfig.getReportName(); 
    // 获取文件后缀名 
    String extFileName = path.substring(path.lastIndexOf('.')+1); 
    HttpHeaders headers = new HttpHeaders(); 
    // 获取用户浏览器的种类 对不同的浏览器进行编码处理 
    final String userAgent = request.getHeader("USER-AGENT"); 
    headers.setContentType(MediaType.APPLICATION_OCTET_STREAM); 
    headers.setContentDispositionFormData("attachment", frameUrlConstants.transFromFileName(userAgent,fileName) + "." + extFileName); 
    return new ResponseEntity(excel,headers,HttpStatus.OK); 
  }

2.服务B将查询出来的参数直接传递给服务A

服务A:

 
  @PostMapping("/export/v2") 
  public ResponseEntity exportExcel(@RequestBody Map params,HttpServletRequest request,HttpServletResponse response) { 
    response.setCharacterEncoding("UTF-8"); 
    try { 
      // 将文件的路径获取到 
      ObjectMapper mapper = new ObjectMapper(); 
      linkedHashMap requestParMap = (linkedHashMap)params.get("cmdExportConfig"); 
      CmdExportConfigDto cmdExportConfigDto = null; 
      List 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() {}); 
      } 
      Map values = (Map)params.get("params"); 
      String filePath = excelService.exportExcel(cmdExportConfigDto,exportFieldList,params,request.getServletContext().getRealPath("/")); 
      Map map = new HashMap(); 
      map.put("filepath", filePath); 
      return new ResponseEntity(map,HttpStatus.OK); 
    }catch (IOException e){ 
      throw new RuntimeException("输出文件出错"); 
    } 
  }

服务B：

 
  @PostMapping(value = "/export/v3/{busicode}",produces = MediaType.TEXT_PLAIN_VALUE) 
  @ResponseBody 
  public ResponseEntity expDownLoadV3(@PathVariable("busicode") String busicode , @RequestBody Map values, HttpServletRequest request)throws Exception { 
    String busiCode = values.get("busiCode").toString(); 
    if(StringUtils.isBlank(busiCode)){ 
      throw new BusinessRuntimeException("参数错误,请检查参数是否正确,busiCode ?"); 
    } 
    // 获取执行过程 
    Map map = excuteRestTemplate(busiCode,values); 
    String path = (String)map.get("filepath"); 
    byte[] excel = FastDFSClient.downloadToBytes(path); 
    CmdExportConfigDto cmdExportConfig = exportService.getCmdExportConfigByBusiCode(busiCode); 
    //获取文件名 
    String fileName = cmdExportConfig.getReportName(); 
    // 获取文件后缀名 
    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(excel,headers,HttpStatus.OK); 
  } 
   
   private Map excuteRestTemplate(String busiCode,Map variables){ 
     String serviceId=""; 
     //查询导出配置 
     CmdExportConfigDto cmdExportConfig = exportService.getCmdExportConfigByBusiCode(busiCode); 
     serviceId = cmdExportConfig.getSystemType(); 
     if(cmdExportConfig==null){ 
throw new BusinessRuntimeException("没有导出配置无法导出"); 
     } 
     //根据导出配置id获取导出字段信息 
     List exportFieldList = exportService.getAllCmdExportFieldConfigDtoByConfigId(cmdExportConfig.getId()); 
     if(StringUtils.isBlank(serviceId)){ 
throw new BusinessRuntimeException("未配置导出的服务"); 
     } 
     Map 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); 
   }

设置浏览器头

 
  public static String transFromFileName(String userAgent,String fileName) throws Exception{ 
    String finalFileName = ""; 
    if(StringUtils.contains(userAgent, "MSIE")){//IE浏览器 
      finalFileName = URLEncoder.encode(fileName,"UTF-8"); 
    }else if(StringUtils.contains(userAgent, "Mozilla")){//google,火狐浏览器 
      finalFileName = new String(fileName.getBytes("GBK"), "ISO8859-1"); 
    }else{ 
      finalFileName = URLEncoder.encode(fileName,"UTF-8");//其他浏览器 
    } 
    return finalFileName; 
  }

总结

以上所述是小编给大家介绍的Spring cloud restTemplate 传递复杂参数的方式(多个对象)，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对考高分网网站的支持！

Spring cloud restTemplate 传递复杂参数的方式(多个对象)

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