RestFul服务问题

Question

尝试设置更新数据库表的restful服务组件。尝试使用Spring RestTemplate以及apache commons restful impl，两者似乎都没有用。

使用
选项1：使用Spring RestTemplate：导致以下错误的结果
com.fasterxml.jackson.databind.JsonMappingException：无法从START_ARRAY标记中反序列化java.util.LinkedHashMap的实例
选项2：使用org.apache.commons.httpclient.methods.PostMethod;导致以下错误
服务器端错误：
   org.codehaus.jackson.JsonParseException：意外字符（'＆lt;'（代码60））：预期有效值（数字，字符串，数组，对象，'true'，'false'或'null'）< / strong>

客户端错误： 服务器拒绝了此请求，因为请求实体所采用的方法所请求的资源不支持该格式（）。
  我的Restful服务方法注释为“Post”并使用“JSON”。我的客户端控制器启动RestFul调用，代码

    @RequestMapping(value="/update", consumes="application/json")
public void updateMaintReport(
        @RequestBody Map<String, String> formModelData, 
        HttpServletRequest request, 
        HttpServletResponse response) 
        throws IOException,JsonMappingException {
    logger.log(LogLevel.DEBUG, "REACHED method updateMaintReport..");
    System.out.println("Reached method updateMaintReport.....");
    boolean errorEncountered = false;
    ReportingSession repSession = null;
    HttpSession session = request.getSession(false);

    if(session==null) {
        // TODO: code for handling invalid/expired session
    } else {
        repSession = (ReportingSession)session.getAttribute(ReportingWebConstants.REPORTING_SESSION);
        if(repSession==null) {
            errorEncountered = true;
        } 
    }

    if(!errorEncountered) {

        ServiceClient serviceClient = new ServiceClient();

        String servicesUrl = this.environment.getProperty("service_url_reports_data");
        String servicesName = this.environment.getProperty("service_name_reports_update_fnol");
        String serviceUrl = VIPUrlFactory.getServiceUrl(servicesUrl+servicesName);
        logger.log(LogLevel.DEBUG, "For update : serviceUrl: "+serviceUrl);

//Option 1: Using Spring RestTemplate :             
        LinkedMultiValueMap<String,String> headers = new LinkedMultiValueMap<String,String>();
        headers.add("Accept","application/json");
        headers.add("Content-type","application/json");
        List list = new ArrayList<Map<String, String>>(); list.add(formModelData);
        RestTemplate restTemplate = new RestTemplate();
        HttpEntity<List> requestEntity = new HttpEntity<List>(list, headers);

        ResponseEntity<List> fList = restTemplate.exchange(serviceUrl,
                HttpMethod.POST, 
                 requestEntity,
                List.class);


//Option 2: using org.apache.commons.httpclient.methods.PostMethod; -- Will be commented when option 1 block is uncommented     
        serviceClient.setParams(formModelData);
        serviceClient.setServiceUrl(serviceUrl);
        serviceClient.callRestServicePost();

        logger.log(LogLevel.DEBUG, "Posting data to service - to execute the update");

    }

}        

在上面的代码中，选项1和选项2块不会同时执行。

下面是接受Restful call的代码块，我的服务器端代码。

    @RequestMapping(value = "/update", method = RequestMethod.POST)
public void updateMainRptData(@RequestBody Map<String, String> formModelData) throws ReportingIntegrationException,
        IOException, JsonMappingException {
    String updateStmt = "UPDATE CL_SCRIPTS SET DELETE_IND = #{delete_ind},  SCRIPT_DESC = #{script_desc}, SCRIPT_TXT = #{script_txt}WHERE   COMPANY_CD = #{company_cd} AND SCRIPT_NAME = #{script_name}AND PROMPT_ID = #{prompt_id}";
    ParameterObjectDTO paramObjDTO = new ParameterObjectDTO();

    logger.log(LogLevel.DEBUG,"In Services Web: updateMainRptData()");

    if(!formModelData.isEmpty()) {
        Set<String> keySet = formModelData.keySet();
        StringBuilder sb = new StringBuilder();
        for (String key : keySet) {
            sb.append(key).append(" -- ").append(formModelData.get(key)).append("\n");
        }
        logger.log(LogLevel.DEBUG, sb.toString());
    }

    paramObjDTO.setModalForQuery(formModelData);
    paramObjDTO.setUpdateSqlStmt(updateStmt);
    maintReportingSvc.updateMaintReport(paramObjDTO);

}        

我在浏览器中看到的错误消息没有用，但我相信我的JSON数据是有效的。任何帮助表示赞赏。谢谢。

Answer 1

后来我更改了方法updateMainRptData的签名，并添加了返回类型和@ResponseBody来解决此问题。