@RequestMapping(params = "method=import", method = RequestMethod.POST)
@ResponseBody
public String importConfig(HttpServletRequest request, HttpServletResponse response) throws Exception{
response.setCharacterEncoding("GBK");
String result = new String();;
try{
//获取请求中的文件
MultipartHttpServletRequest multipartHttpServletRequest = (MultipartHttpServletRequest) request;
MultipartFile contentFile = multipartHttpServletRequest.getFile(IMPORT_FILE_NAME); //IMPORT_FILE_NAME为前端中input的name
//读取请求中的excel
Workbook workbook = Workbook.getWorkbook(contentFile.getInputStream());
Sheet sheet = workbook.getSheet(0);
int rows=sheet.getRows();
int columns=sheet.getColumns();
//将excel中的内容读为ConfigInfo对象
List<ConfigInfo> listConfigInfo = new ArrayList<ConfigInfo>();
for(int i=1; i<rows; i++){
ConfigInfo configInfo = new ConfigInfo();
for(int j=0; j<columns; j++){
Cell cell = sheet.getCell(j, i);
String cellContent = cell.getContents();
switch (j){
case 0 : configInfo.setDataId(cellContent);
case 1 : configInfo.setGroup(cellContent);
case 2 : configInfo.setContent(cellContent);
}
}
listConfigInfo.add(configInfo);
}
//写入数据库
int importFailedNum = 0;
for(ConfigInfo configInfo:listConfigInfo){
ConfigInfo configInfoExist = configService.findConfigInfo(configInfo.getDataId(), configInfo.getGroup());
//写入数据库之前判断是否存在该条配置，并记录
if (null != configInfoExist){
importFailedNum++;
}else{
try{
configService.addConfigInfo(configInfo.getDataId(), configInfo.getGroup(),configInfo.getContent());
}catch(Exception operationDatabaseException){
log.error("导入配置出错"+operationDatabaseException);
return result;
}
}
}
result = String.valueOf(importFailedNum);
return result;
}catch(Exception exception){
log.error("导入配置出错"+exception);
return result;
}
}
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html; charset=GBK" pageEncoding="GBK"%>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK" />
<title>导入配置信息</title>
<script src="../../../js/jquery.js" type="text/javascript"></script>
<script src="../../../js/ajaxfileupload.js" type="text/javascript"></script>
<style type="text/css">
body td {
color: #333;
font-family: Arial, Helvetica, sans-serif;
font-size: 10pt;
}
</style>
<script type="text/javascript">
$(function () {
$(":button").click(function () {
if ($("#contentFile").val().length > 0) {
ajaxFileUpload();
}
else {
alert("请选择文件");
}
})
})
function ajaxFileUpload() {
$.ajaxFileUpload
(
{
url: '/diamond-server/admin.do?method=import', //用于文件上传的服务器端请求地址
secureuri: false, //一般设置为false
fileElementId: 'contentFile', //文件上传空间的id属性 <input type="file" id="file" name="file" />
dataType: 'JSON', //返回值类型 一般设置为json
type:'post',
success: function (data, status) //服务器成功响应处理函数
{
//判断返回的值
if (data == 0)
alert("导入配置成功");
else
alert("错误！第"+data+"条配置导入失败，请仔细对比要导入的配置，不能与已存在的配置重复");
if (typeof (data.error) != 'undefined') {
if (data.error != '') {
alert(data.error);
} else {
alert(data.msg);
}
}
window.location.href = "list.jsp";
},
error: function (data, status, e)//服务器响应失败处理函数
{
alert(e);
window.location.href = "list.jsp";
}
}
)
return false;
}
</script>
</head>
<body>
<center><h1><strong>导入配置信息</strong></h1></center>
<p align='center'>
<input type="file" id="contentFile" name="contentFile" />
<input type="button" value="上传" />
</p>
</body>
</html>
在MultipartHttpServletRequest multipartHttpServletRequest = (MultipartHttpServletRequest) request;这句代码执行强转出错。发现我的配置文件里少了对multipart解析器的配置:
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="104857600"/> <!-- 文件最大的大小 -->
<property name="maxInMemorySize" value="4096"/>
</bean>
同时需要依赖commons-fileupload-1.2.jar和commons-io-1.3.1。