项目介绍
管理员角色包含以下功能：
进货信息管理,员工信息管理,库存信息管理,销售信息管理,客户信息管理,供应商信息管理,系统信息管理,管理员登录等功能。
由于本程序规模不大，可供课程设计，毕业设计学习演示之用
环境需要
1.运行环境：最好是java jdk 1.8，我们在这个平台上运行的。其他版本理论上也可以。
2.IDE环境：IDEA，Eclipse,Myeclipse都可以。推荐IDEA;
3.tomcat环境：Tomcat 7.x,8.x,9.x版本均可
4.硬件环境：windows 7/8/10 1G内存以上；或者 Mac OS；
5.数据库：MySql 5.7版本；
技术栈
HTML+CSS+JavaScript+jsp+mysql
使用说明
1. 使用Navicat或者其它工具，在mysql中创建对应名称的数据库，并导入项目的sql文件；
2. 使用IDEA/Eclipse/MyEclipse导入项目，Eclipse/MyEclipse导入时，若为maven项目请选择maven;若为maven项目，导入成功后请执行maven clean;maven install命令，然后运行；
3. 将项目中application.yml配置文件中的数据库配置改为自己的配置;
4. 运行项目，输入localhost:8080/login.jsp 登录
运行截图
相关代码
客户关系控制器
@RequestMapping(value = "/**/customerManage")
@Controller
public class CustomerManageHandler {
@Autowired
private CustomerManageService customerManageService;
private static final String SEARCH_BY_ID = "searchByID";
private static final String SEARCH_BY_NAME = "searchByName";
private static final String SEARCH_ALL = "searchAll";
/**
* 通用的结果查询方法
*
* @param searchType 查询方式
* @param keyWord 查询关键字
* @param offset 分页偏移值
* @param limit 分页大小
* @return 返回指定条件查询的结果
*/
private Map<String, Object> query(String searchType, String keyWord, int offset, int limit) throws CustomerManageServiceException {
Map<String, Object> queryResult = null;
switch (searchType) {
case SEARCH_BY_ID:
if (StringUtils.isNumeric(keyWord))
queryResult = customerManageService.selectById(Integer.valueOf(keyWord));
break;
case SEARCH_BY_NAME:
queryResult = customerManageService.selectByName(offset, limit, keyWord);
break;
case SEARCH_ALL:
queryResult = customerManageService.selectAll(offset, limit);
break;
default:
// do other thing
break;
}
return queryResult;
}
/**
* 搜索客户信息
*
* @param searchType 搜索类型
* @param offset 如有多条记录时分页的偏移值
* @param limit 如有多条记录时分页的大小
* @param keyWord 搜索的关键字
* @return 返回查询的结果，其中键值为 rows 的代表查询到的每一记录，若有分页则为分页大小的记录；键值为 total 代表查询到的符合要求的记录总条数
*/
@SuppressWarnings("unchecked")
@RequestMapping(value = "getCustomerList", method = RequestMethod.GET)
public
@ResponseBody
Map<String, Object> getCustomerList(@RequestParam("searchType") String searchType,
@RequestParam("offset") int offset,
@RequestParam("limit") int limit,
@RequestParam("keyWord") String keyWord) throws CustomerManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
List<Supplier> rows = null;
long total = 0;
Map<String, Object> queryResult = query(searchType, keyWord, offset, limit);
if (queryResult != null) {
rows = (List<Supplier>) queryResult.get("data");
total = (long) queryResult.get("total");
}
// 设置 Response
responseContent.setCustomerInfo("rows", rows);
responseContent.setResponseTotal(total);
responseContent.setResponseResult(Response.RESPONSE_RESULT_SUCCESS);
return responseContent.generateResponse();
}
/**
* 添加一条客户信息
*
* @param customer 客户信息
* @return 返回一个map，其中：key 为 result表示操作的结果，包括：success 与 error
*/
@RequestMapping(value = "addCustomer", method = RequestMethod.POST)
public
@ResponseBody
Map<String, Object> addCustomer(@RequestBody Customer customer) throws CustomerManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
// 添加记录
String result = customerManageService.addCustomer(customer) ? Response.RESPONSE_RESULT_SUCCESS : Response.RESPONSE_RESULT_ERROR;
responseContent.setResponseResult(result);
return responseContent.generateResponse();
}
/**
* 查询指定 customer ID 客户的信息
*
* @param customerID 客户ID
* @return 返回一个map，其中：key 为 result 的值为操作的结果，包括：success 与 error；key 为 data
* 的值为客户信息
*/
@RequestMapping(value = "getCustomerInfo", method = RequestMethod.GET)
public
@ResponseBody
Map<String, Object> getCustomerInfo(@RequestParam("customerID") String customerID) throws CustomerManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
String result = Response.RESPONSE_RESULT_ERROR;
// 获取客户信息
Customer customer = null;
Map<String, Object> queryResult = query(SEARCH_BY_ID, customerID, -1, -1);
if (queryResult != null) {
customer = (Customer) queryResult.get("data");
if (customer != null) {
result = Response.RESPONSE_RESULT_SUCCESS;
}
}
// 设置 Response
responseContent.setResponseResult(result);
responseContent.setResponseData(customer);
return responseContent.generateResponse();
}
/**
* 更新客户信息
*
* @param customer 客户信息
* @return 返回一个map，其中：key 为 result表示操作的结果，包括：success 与 error
*/
@RequestMapping(value = "updateCustomer", method = RequestMethod.POST)
public
@ResponseBody
Map<String, Object> updateCustomer(@RequestBody Customer customer) throws CustomerManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
// 更新
String result = customerManageService.updateCustomer(customer) ? Response.RESPONSE_RESULT_SUCCESS : Response.RESPONSE_RESULT_ERROR;
responseContent.setResponseResult(result);
return responseContent.generateResponse();
}
/**
* 删除客户记录
*
* @param customerIDStr 客户ID
* @return 返回一个map，其中：key 为 result表示操作的结果，包括：success 与 error
*/
@RequestMapping(value = "deleteCustomer", method = RequestMethod.GET)
public
@ResponseBody
Map<String, Object> deleteCustomer(@RequestParam("customerID") String customerIDStr) throws CustomerManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
// 参数检查
if (StringUtils.isNumeric(customerIDStr)) {
// 转换为 Integer
Integer customerID = Integer.valueOf(customerIDStr);
// 刪除
String result = customerManageService.deleteCustomer(customerID) ? Response.RESPONSE_RESULT_SUCCESS : Response.RESPONSE_RESULT_ERROR;
responseContent.setResponseResult(result);
} else
responseContent.setResponseResult(Response.RESPONSE_RESULT_ERROR);
return responseContent.generateResponse();
}
/**
* 导入客户信息
*
* @param file 保存有客户信息的文件
* @return 返回一个map，其中：key 为 result表示操作的结果，包括：success 与
* error；key为total表示导入的总条数；key为available表示有效的条数
*/
@RequestMapping(value = "importCustomer", method = RequestMethod.POST)
public
@ResponseBody
Map<String, Object> importCustomer(@RequestParam("file") MultipartFile file) throws CustomerManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
String result = Response.RESPONSE_RESULT_SUCCESS;
// 读取文件内容
int total = 0;
int available = 0;
if (file == null)
result = Response.RESPONSE_RESULT_ERROR;
Map<String, Object> importInfo = customerManageService.importCustomer(file);
if (importInfo != null) {
total = (int) importInfo.get("total");
available = (int) importInfo.get("available");
}
responseContent.setResponseResult(result);
responseContent.setResponseTotal(total);
responseContent.setCustomerInfo("available", available);
return responseContent.generateResponse();
}
/**
* 导出客户信息
*
* @param searchType 查找类型
* @param keyWord 查找关键字
* @param response HttpServletResponse
*/
@SuppressWarnings("unchecked")
@RequestMapping(value = "exportCustomer", method = RequestMethod.GET)
public void exportCustomer(@RequestParam("searchType") String searchType, @RequestParam("keyWord") String keyWord,
HttpServletResponse response) throws CustomerManageServiceException, IOException {
String fileName = "customerInfo.xlsx";
List<Customer> customers = null;
Map<String, Object> queryResult = query(searchType, keyWord, -1, -1);
if (queryResult != null) {
customers = (List<Customer>) queryResult.get("data");
}
// 获取生成的文件
File file = customerManageService.exportCustomer(customers);
// 写出文件
if (file != null) {
// 设置响应头
response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
FileInputStream inputStream = new FileInputStream(file);
OutputStream outputStream = response.getOutputStream();
byte[] buffer = new byte[8192];
int len;
while ((len = inputStream.read(buffer, 0, buffer.length)) > 0) {
outputStream.write(buffer, 0, len);
outputStream.flush();
}
inputStream.close();
outputStream.close();
}
}
}货物信息管理控制器
@RequestMapping(value = "/**/goodsManage")
@Controller
public class GoodsManageHandler {
@Autowired
private GoodsManageService goodsManageService;
private static final String SEARCH_BY_ID = "searchByID";
private static final String SEARCH_BY_NAME = "searchByName";
private static final String SEARCH_ALL = "searchAll";
/**
* 通用的记录查询
*
* @param searchType 查询类型
* @param keyWord 查询关键字
* @param offset 分页偏移值
* @param limit 分页大小
* @return 返回一个 Map ，包含所有符合要求的查询结果，以及记录的条数
*/
private Map<String, Object> query(String searchType, String keyWord, int offset, int limit) throws GoodsManageServiceException {
Map<String, Object> queryResult = null;
switch (searchType) {
case SEARCH_BY_ID:
if (StringUtils.isNumeric(keyWord))
queryResult = goodsManageService.selectById(Integer.valueOf(keyWord));
break;
case SEARCH_BY_NAME:
queryResult = goodsManageService.selectByName(keyWord);
break;
case SEARCH_ALL:
queryResult = goodsManageService.selectAll(offset, limit);
break;
default:
// do other thing
break;
}
return queryResult;
}
/**
* 搜索货物信息
*
* @param searchType 搜索类型
* @param offset 如有多条记录时分页的偏移值
* @param limit 如有多条记录时分页的大小
* @param keyWord 搜索的关键字
* @return 返回所有符合要求的记录
*/
@SuppressWarnings("unchecked")
@RequestMapping(value = "getGoodsList", method = RequestMethod.GET)
public
@ResponseBody
Map<String, Object> getGoodsList(@RequestParam("searchType") String searchType,
@RequestParam("offset") int offset, @RequestParam("limit") int limit,
@RequestParam("keyWord") String keyWord) throws GoodsManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
List<Supplier> rows = null;
long total = 0;
// 查询
Map<String, Object> queryResult = query(searchType, keyWord, offset, limit);
if (queryResult != null) {
rows = (List<Supplier>) queryResult.get("data");
total = (long) queryResult.get("total");
}
// 设置 Response
responseContent.setCustomerInfo("rows", rows);
responseContent.setResponseTotal(total);
return responseContent.generateResponse();
}
/**
* 添加一条货物信息
*
* @param goods 货物信息
* @return 返回一个map，其中：key 为 result表示操作的结果，包括：success 与 error
*/
@RequestMapping(value = "addGoods", method = RequestMethod.POST)
public
@ResponseBody
Map<String, Object> addGoods(@RequestBody Goods goods) throws GoodsManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
// 添加记录
String result = goodsManageService.addGoods(goods) ? Response.RESPONSE_RESULT_SUCCESS : Response.RESPONSE_RESULT_ERROR;
// 设置 Response
responseContent.setResponseResult(result);
return responseContent.generateResponse();
}
/**
* 查询指定 goods ID 货物的信息
*
* @param goodsID 货物ID
* @return 返回一个map，其中：key 为 result 的值为操作的结果，包括：success 与 error；key 为 data
* 的值为货物信息
*/
@RequestMapping(value = "getGoodsInfo", method = RequestMethod.GET)
public
@ResponseBody
Map<String, Object> getGoodsInfo(@RequestParam("goodsID") Integer goodsID) throws GoodsManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
String result = Response.RESPONSE_RESULT_ERROR;
// 获取货物信息
Goods goods = null;
Map<String, Object> queryResult = goodsManageService.selectById(goodsID);
if (queryResult != null) {
goods = (Goods) queryResult.get("data");
if (goods != null) {
result = Response.RESPONSE_RESULT_SUCCESS;
}
}
// 设置 Response
responseContent.setResponseResult(result);
responseContent.setResponseData(goods);
return responseContent.generateResponse();
}
/**
* 更新货物信息
*
* @param goods 货物信息
* @return 返回一个map，其中：key 为 result表示操作的结果，包括：success 与 error
*/
@RequestMapping(value = "updateGoods", method = RequestMethod.POST)
public
@ResponseBody
Map<String, Object> updateGoods(@RequestBody Goods goods) throws GoodsManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
// 更新
String result = goodsManageService.updateGoods(goods) ? Response.RESPONSE_RESULT_SUCCESS : Response.RESPONSE_RESULT_ERROR;
// 设置 Response
responseContent.setResponseResult(result);
return responseContent.generateResponse();
}
/**
* 删除货物记录
*
* @param goodsID 货物ID
* @return 返回一个map，其中：key 为 result表示操作的结果，包括：success 与 error
*/
@RequestMapping(value = "deleteGoods", method = RequestMethod.GET)
public
@ResponseBody
Map<String, Object> deleteGoods(@RequestParam("goodsID") Integer goodsID) throws GoodsManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
// 删除
String result = goodsManageService.deleteGoods(goodsID) ? Response.RESPONSE_RESULT_SUCCESS : Response.RESPONSE_RESULT_ERROR;
// 设置 Response
responseContent.setResponseResult(result);
return responseContent.generateResponse();
}
/**
* 导入货物信息
*
* @param file 保存有货物信息的文件
* @return 返回一个map，其中：key 为 result表示操作的结果，包括：success 与
* error；key为total表示导入的总条数；key为available表示有效的条数
*/
@RequestMapping(value = "importGoods", method = RequestMethod.POST)
public
@ResponseBody
Map<String, Object> importGoods(@RequestParam("file") MultipartFile file) throws GoodsManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
String result = Response.RESPONSE_RESULT_ERROR;
// 读取文件内容
int total = 0;
int available = 0;
if (file != null) {
Map<String, Object> importInfo = goodsManageService.importGoods(file);
if (importInfo != null) {
total = (int) importInfo.get("total");
available = (int) importInfo.get("available");
result = Response.RESPONSE_RESULT_SUCCESS;
}
}
// 设置 Response
responseContent.setResponseResult(result);
responseContent.setResponseTotal(total);
responseContent.setCustomerInfo("available", available);
return responseContent.generateResponse();
}
/**
* 导出货物信息
*
* @param searchType 查找类型
* @param keyWord 查找关键字
* @param response HttpServletResponse
*/
@SuppressWarnings("unchecked")
@RequestMapping(value = "exportGoods", method = RequestMethod.GET)
public void exportGoods(@RequestParam("searchType") String searchType, @RequestParam("keyWord") String keyWord,
HttpServletResponse response) throws GoodsManageServiceException, IOException {
String fileName = "goodsInfo.xlsx";
List<Goods> goodsList = null;
Map<String, Object> queryResult = query(searchType, keyWord, -1, -1);
if (queryResult != null) {
goodsList = (List<Goods>) queryResult.get("data");
}
// 获取生成的文件
File file = goodsManageService.exportGoods(goodsList);
// 写出文件
if (file != null) {
// 设置响应头
response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
FileInputStream inputStream = new FileInputStream(file);
OutputStream outputStream = response.getOutputStream();
byte[] buffer = new byte[8192];
int len;
while ((len = inputStream.read(buffer, 0, buffer.length)) > 0) {
outputStream.write(buffer, 0, len);
outputStream.flush();
}
inputStream.close();
outputStream.close();
}
}
}仓库管理控制器
@Controller
@RequestMapping(value = "/**/repositoryManage")
public class RepositoryManageHandler {
@Autowired
private RepositoryService repositoryService;
private static final String SEARCH_BY_ID = "searchByID";
private static final String SEARCH_BY_ADDRESS = "searchByAddress";
private static final String SEARCH_ALL = "searchAll";
/**
* 通用的记录查询
*
* @param searchType 查询方式
* @param keyword 查询关键字
* @param offset 分页偏移值
* @param limit 分页大小
* @return 返回所有符合条件的查询结果
*/
private Map<String, Object> query(String searchType, String keyword, int offset, int limit) throws RepositoryManageServiceException {
Map<String, Object> queryResult = null;
switch (searchType) {
case SEARCH_BY_ID:
if (StringUtils.isNumeric(keyword)) {
queryResult = repositoryService.selectById(Integer.valueOf(keyword));
}
break;
case SEARCH_BY_ADDRESS:
queryResult = repositoryService.selectByAddress(offset, limit, keyword);
break;
case SEARCH_ALL:
queryResult = repositoryService.selectAll(offset, limit);
break;
default:
// do other thing
break;
}
return queryResult;
}
/**
* 查询仓库信息
*
* @param searchType 查询类型
* @param offset 分页偏移值
* @param limit 分页大小
* @param keyWord 查询关键字
* @return 返回一个Map，其中key=rows，表示查询出来的记录；key=total，表示记录的总条数
*/
@SuppressWarnings("unchecked")
@RequestMapping(value = "getRepositoryList", method = RequestMethod.GET)
public
@ResponseBody
Map<String, Object> getRepositoryList(@RequestParam("searchType") String searchType,
@RequestParam("offset") int offset, @RequestParam("limit") int limit,
@RequestParam("keyWord") String keyWord) throws RepositoryManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
List<Repository> rows = null;
long total = 0;
// 查询
Map<String, Object> queryResult = query(searchType, keyWord, offset, limit);
if (queryResult != null) {
rows = (List<Repository>) queryResult.get("data");
total = (long) queryResult.get("total");
}
// 设置 Response
responseContent.setCustomerInfo("rows", rows);
responseContent.setResponseTotal(total);
return responseContent.generateResponse();
}
/**
* 查询所有未指派管理员的仓库
*
* @return 返回一个 map，其中key=data表示查询的记录，key=total表示记录的条数
*/
@SuppressWarnings("unchecked")
@RequestMapping(value = "getUnassignRepository", method = RequestMethod.GET)
public
@ResponseBody
Map<String, Object> getUnassignRepository() throws RepositoryManageServiceException {
// 初始化结果集
Map<String, Object> resultSet = new HashMap<>();
List<Repository> data;
long total = 0;
// 查询
Map<String, Object> queryResult = repositoryService.selectUnassign();
if (queryResult != null) {
data = (List<Repository>) queryResult.get("data");
total = (long) queryResult.get("total");
} else
data = new ArrayList<>();
resultSet.put("data", data);
resultSet.put("total", total);
return resultSet;
}
/**
* 添加一条仓库信息
*
* @param repository 仓库信息
* @return 返回一个map，其中：key 为 result表示操作的结果，包括：success 与 error
*/
@RequestMapping(value = "addRepository", method = RequestMethod.POST)
public
@ResponseBody
Map<String, Object> addRepository(@RequestBody Repository repository) throws RepositoryManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
// 添加记录
String result = repositoryService.addRepository(repository) ? Response.RESPONSE_RESULT_SUCCESS : Response.RESPONSE_RESULT_ERROR;
// 设置 Response
responseContent.setResponseResult(result);
return responseContent.generateResponse();
}
/**
* 查询指定 ID 的仓库信息
*
* @param repositoryID 仓库ID
* @return 返回一个map，其中：key 为 result 的值为操作的结果，包括：success 与 error；key 为 data
* 的值为仓库信息
*/
@RequestMapping(value = "getRepositoryInfo", method = RequestMethod.GET)
public
@ResponseBody
Map<String, Object> getRepositoryInfo(@RequestParam("repositoryID") Integer repositoryID) throws RepositoryManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
String result = Response.RESPONSE_RESULT_ERROR;
// 查询
Repository repository = null;
Map<String, Object> queryResult = repositoryService.selectById(repositoryID);
if (queryResult != null) {
repository = (Repository) queryResult.get("data");
if (repository != null)
result = Response.RESPONSE_RESULT_SUCCESS;
}
// 设置 Response
responseContent.setResponseResult(result);
responseContent.setResponseData(repository);
return responseContent.generateResponse();
}
/**
* 更新仓库信息
*
* @param repository 仓库信息
* @return 返回一个map，其中：key 为 result 的值为操作的结果，包括：success 与 error；key 为 data
* 的值为仓库信息
*/
@RequestMapping(value = "updateRepository", method = RequestMethod.POST)
public
@ResponseBody
Map<String, Object> updateRepository(@RequestBody Repository repository) throws RepositoryManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
// 更新
String result = repositoryService.updateRepository(repository) ? Response.RESPONSE_RESULT_SUCCESS : Response.RESPONSE_RESULT_ERROR;
// 设置 Response
responseContent.setResponseResult(result);
return responseContent.generateResponse();
}
/**
* 删除指定 ID 的仓库信息
*
* @param repositoryID 仓库ID
* @return 返回一个map，其中：key 为 result 的值为操作的结果，包括：success 与 error；key 为 data
* 的值为仓库信息
*/
@RequestMapping(value = "deleteRepository", method = RequestMethod.GET)
public
@ResponseBody
Map<String, Object> deleteRepository(@RequestParam("repositoryID") Integer repositoryID) throws RepositoryManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
// 删除记录
String result = repositoryService.deleteRepository(repositoryID) ? Response.RESPONSE_RESULT_SUCCESS : Response.RESPONSE_RESULT_ERROR;
// 设置 Response
responseContent.setResponseResult(result);
return responseContent.generateResponse();
}
/**
* 从文件中导入仓库信息
*
* @param file 保存有仓库信息的文件
* @return 返回一个map，其中：key 为 result表示操作的结果，包括：success 与
* error；key为total表示导入的总条数；key为available表示有效的条数
*/
@RequestMapping(value = "importRepository", method = RequestMethod.POST)
public
@ResponseBody
Map<String, Object> importRepository(MultipartFile file) throws RepositoryManageServiceException {
// 初始化 Response
Response responseContent = ResponseFactory.newInstance();
String result = Response.RESPONSE_RESULT_ERROR;
// 读取文件
int total = 0;
int available = 0;
if (file != null) {
Map<String, Object> importInfo = repositoryService.importRepository(file);
if (importInfo != null) {
total = (int) importInfo.get("total");
available = (int) importInfo.get("available");
result = Response.RESPONSE_RESULT_SUCCESS;
}
}
// 设置 Response
responseContent.setResponseResult(result);
responseContent.setResponseTotal(total);
responseContent.setCustomerInfo("available", available);
return responseContent.generateResponse();
}
/**
* 导出仓库信息到文件中
*
* @param searchType 查询类型
* @param keyWord 查询关键字
* @param response HttpServletResponse
*/
@SuppressWarnings("unchecked")
@RequestMapping(value = "exportRepository", method = RequestMethod.GET)
public void exportRepository(@RequestParam("searchType") String searchType, @RequestParam("keyWord") String keyWord,
HttpServletResponse response) throws RepositoryManageServiceException, IOException {
// 导出文件名
String fileName = "repositoryInfo.xlsx";
// 查询
List<Repository> repositories;
Map<String, Object> queryResult = query(searchType, keyWord, -1, -1);
if (queryResult != null)
repositories = (List<Repository>) queryResult.get("data");
else
repositories = new ArrayList<>();
// 生成文件
File file = repositoryService.exportRepository(repositories);
// 输出文件
if (file != null) {
// 设置响应头
response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
FileInputStream inputStream = new FileInputStream(file);
OutputStream outputStream = response.getOutputStream();
byte[] buffer = new byte[8192];
int len;
while ((len = inputStream.read(buffer, 0, buffer.length)) > 0) {
outputStream.write(buffer, 0, len);
outputStream.flush();
}
inputStream.close();
outputStream.close();
}
}
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