我有一个带有(jsp)视图解析器的基于spring java配置的web应用程序。现在,当用户单击应用程序中的 excel 图标时,我想显示一个带有一些数据的 excel 表。在整个互联网上,我只找到了我不熟悉的 excel 视图的基于 xml 的 spring 配置。我在某种程度上进行了解码,并且非常接近完成我的任务。下面是我得到的。
我有类似的控制器和主页下面的链接:
http://static.springsource.org/spring/docs/3.0.0.M3/reference/html/ch17s06.html
控制代码:
@Controller
public class ExcelController extends AbstractController {
@Override
@RequestMapping(value = "/Excel", method = RequestMethod.POST)
protected ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response) throws Exception {
BufferedReader in = null;
try {
URL oracle = new URL("example.com");
URLConnection yc =null;
yc = oracle.openConnection();
in = new BufferedReader(
new InputStreamReader(
yc.getInputStream()));
}
catch(Exception e){
System.err.println(e);
}
Map map = new HashMap();
map.put("input", in);
return new ModelAndView("xl", map);
}
}
查看代码:
public class ExcelReportView extends AbstractExcelView{
@Override
protected void buildExcelDocument(Map model, HSSFWorkbook workbook,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
HSSFSheet sheet;
HSSFRow row;
HSSFCell cell;
try {
BufferedReader in = (BufferedReader) model.get("input");
sheet=workbook.createSheet("spring");
String inputLine;
int rowNum =0;
while ((inputLine = in.readLine()) != null) {
row = sheet.createRow(rowNum++);
String[] coloumns = inputLine.split("\t");
int cellNum =0;
for(String coloumn: coloumns){
cell = row.createCell(cellNum++);
cell.setCellValue(coloumn);
}
System.out.println(inputLine);
}
in.close();
System.out.println("Excel written successfully..");
} catch (IOException e) {
e.printStackTrace();
}
} }
视图.properties
xl.class=package.ExcelReportView
WebAppConfig.java
@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "package")
public class WebAppContextConfig extends WebMvcConfigurerAdapter {
// Resolve logical view names to .jsp resources in /WEB-INF/views directory
@Bean
public InternalResourceViewResolver configureInternalResourceViewResolver() {
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/jsp/");
resolver.setSuffix(".jsp");
return resolver;
}
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/scripts/**").addResourceLocations(
"/scripts/");
registry.addResourceHandler("/css/**").addResourceLocations("/css/");
registry.addResourceHandler("/img/**").addResourceLocations("/img/");
}
}
前端代码:
function AjaxCallForExcel(){
$.ajax({
type: 'POST',
url: location.href + '/Excel',
data: ({name:name })
});
}
以下是我在日志中看到的内容:
DispatcherServlet with name 'appServlet' processing POST request for [/App/Excel]
Looking up handler method for path /App/Excel
Returning handler method [protected org.springframework.web.servlet.ModelAndView package.ExcelController.handleRequestInternal(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) throws java.lang.Exception]
Returning cached instance of singleton bean 'excelController'
Invoking afterPropertiesSet() on bean with name 'xl'
Rendering view [org.springframework.web.servlet.view.JstlView: name 'xl'; URL [**/WEB-INF/jsp/xl.jsp**]] in DispatcherServlet with name 'appServlet'
Added model object 'org.springframework.validation.BindingResult.input' of type [org.springframework.validation.BeanPropertyBindingResult] to request in view with name 'xl'
Added model object 'input' of type [java.io.BufferedReader] to request in view with name 'xl'
Forwarding to resource [/WEB-INF/jsp/xl.jsp] in InternalResourceView 'xl'
Successfully completed request
我不知道如何避免它转发到 xl.jsp。我确信视图解析器正在将其放入 jsp 视图中。有人可以指出我该如何解决它。
编辑
我在网上看到了这个 xml 等效配置。不知道如何使它成为java配置:
<bean id="excelViewResolver" class="org.springframework.web.servlet.view.XmlViewResolver">
<property name="order" value="1"/>
<property name="location" value="/WEB-INF/views.xml"/>
</bean>
我尝试通过以下方式转换它:
@Bean
public XmlViewResolver configureXmlViewResolver(){
XmlViewResolver resolver = new XmlViewResolver();
resolver.setOrder(1);
resolver.setLocation(**WHAT SHOULD BE HERE**);
}
我不知道该放什么位置。我不能给字符串。我没有views.xml,因为我使用的是java configs
编辑(这是我在按照您所说的进行更改后的代码)
public class ExcelReportView extends AbstractExcelView{
BufferedReader in;
ExcelReportView(BufferedReader in){
this.in = in;
}
@Override
protected void buildExcelDocument(Map model, HSSFWorkbook workbook,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
HSSFSheet sheet;
HSSFRow row;
HSSFCell cell;
response.setHeader("Content-Type", "application/octet-stream");
response.setHeader("Content-Disposition", "attachment; filename=MyExcelSpreadsheet.xls");
try {
//BufferedReader in = (BufferedReader) model.get("input");
sheet=workbook.createSheet("spring");
String inputLine;
int rowNum =0;
while ((inputLine = in.readLine()) != null) {
row = sheet.createRow(rowNum++);
String[] coloumns = inputLine.split("\t");
int cellNum =0;
for(String coloumn: coloumns){
cell = row.createCell(cellNum++);
cell.setCellValue(coloumn);
}
System.out.println(inputLine);
}
in.close();
System.out.println("Excel written successfully..");
} catch (IOException e) {
e.printStackTrace();
}
OutputStream outStream = null;
try {
outStream = response.getOutputStream();
workbook.write(outStream);
outStream.flush();
} finally {
outStream.close();
}
}
}
控制器代码:
@Controller
public class ExcelController {
@RequestMapping(value = "/Excel", method = RequestMethod.POST)
protected ModelAndView generateCSV(HttpServletRequest request,
HttpServletResponse response) throws Exception {
BufferedReader in = null;
try {
URL oracle = new URL("http://service.com");
URLConnection yc =null;
yc = oracle.openConnection();
in = new BufferedReader(
new InputStreamReader(
yc.getInputStream()));
}
catch(Exception e){
System.err.println(e);
}
ModelAndView mav = new ModelAndView();
mav.setView(new ExcelReportView( in));
return mav;
}
}
日志输出:
DispatcherServlet with name 'appServlet' processing POST request for [/App/Excel]
Looking up handler method for path /App/Excel
Returning handler method [protected org.springframework.web.servlet.ModelAndView com.package.ExcelController.generateCSV(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) throws java.lang.Exception]
Returning cached instance of singleton bean 'excelController'
Rendering view [com.package.controllers.ExcelReportView: unnamed] in DispatcherServlet with name 'appServlet'
Created Excel Workbook from scratch
Title Id required
Excel written successfully..
Successfully completed request
编辑:
响应标头:
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Pragma: private
Cache-Control: private, must-revalidate
Content-Disposition: attachment; filename=MyExcelSpreadsheet.xls
Content-Type: application/octet-stream;charset=ISO-8859-1
Content-Language: en-US
Transfer-Encoding: chunked
Date: Tue, 12 Mar 2013 16:36:52 GMT