近日因為專案要求相容IE7， 不得不修改上傳圖片的外掛（由uploadify改為ocupload）。幾經周折終於搞定上傳功能，在chrome， ff測試都通過，偏偏在IE7會因為返回值是json， 會彈出下載框。（本機只有原生IE7, 未能測試IE8是否有該問題， 據說IE9及以上是已經支援json格式的）。當然網上還是有大把的解決方案的，個人測試後覺得最靠譜的還是：ContentType設定為text/plain。專案使用的是springMVC，具體程式碼如下：

package cn.***.saas.util;

import net.sf.json.JSONObject;

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;

import cn.***.saas.constant.ResponseCode;
import cn.***.saas.constant.ResponseStatus;

public class ResponseUtilForIe {

    public static final String RESPONSE_BODY = "body";

    public static final String RESPONSE_STATUS = "status";

    public static final String RESPONSE_ERROR = "error";

    public static final String RESPONSE_ERROR_CODE = "code";

    public static final String RESPONSE_ERROR_MSG = "msg";

    public static ResponseEntity<String> jsonSucceed(Object object, HttpStatus statusCode) {
        JSONObject jo = new JSONObject();
        Object responseBody = DataUtil.formatApiResponse(object);
        jo.accumulate(RESPONSE_BODY, responseBody);
        return wrapResponse(ResponseStatus.SUCCEED, jo, statusCode);
    }

    public static ResponseEntity<String> jsonFailed(String errorMessage, HttpStatus statusCode) {
        return jsonFailed(errorMessage, ResponseCode.SERVER_ERROR, statusCode);
    }

    public static ResponseEntity<String> jsonFailed(Object errorMessage, ResponseCode code, HttpStatus statusCode) {
        JSONObject errorObj = new JSONObject();
        errorObj.accumulate(RESPONSE_ERROR_CODE, code.getValue());
        errorObj.accumulate(RESPONSE_ERROR_MSG, errorMessage);

        JSONObject error = new JSONObject();
        error.accumulate(RESPONSE_ERROR, errorObj);

        JSONObject jo = new JSONObject();
        jo.accumulate(RESPONSE_BODY, error);
        return wrapResponse(ResponseStatus.FAILED, jo, statusCode);
    }

    private static ResponseEntity<String> wrapResponse(ResponseStatus status, JSONObject body, HttpStatus statusCode) {
        HttpHeaders headers = new HttpHeaders();
        headers.set("Content-Type", "text/plain;charset=UTF-8");
        if (ResponseStatus.SUCCEED.equals(status)) {
            body.accumulate(RESPONSE_STATUS, ResponseStatus.SUCCEED.toString());
        } else if (ResponseStatus.FAILED.equals(status)) {
            body.accumulate(RESPONSE_STATUS, ResponseStatus.FAILED.toString());
        }
        return new ResponseEntity<String>(body.toString(), headers, statusCode);
    }
}
 

此外也有說通過修改登錄檔的， 方法是： 在登錄檔中新增如下項：

[HKEY_CLASSES_ROOT\MIME\Database\Content Type\application/json]  
  
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"  
  
"Encoding"=dword:00080000  
  
  
[HKEY_CLASSES_ROOT\MIME\Database\Content Type\text/json]  
  
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"  
  
"encoding"=dword:00080000