获取参数值以生成图表
用户输入两个日期 它需要单击一个按钮...
如果日期有效，则调用相同的 jsp 页面并在请求中设置一些值...在此 jsp 中，如果 setSeachDone 为 true，则会生成一个图表...
另一个为图像调用 servled 控制器...但是请求中已设置的值是空的
@Controller
@RequestMapping("/statError")
public class StatisticError {
@Autowired
private IUserService userService;
@InitBinder("statisticForm")
protected void initBinder(WebDataBinder binder) {
binder.setValidator(new StatisticErrorFormValidator());
}
@RequestMapping(method = RequestMethod.GET)
public String statistic(Model model) {
StatisticErrorForm statisticForm = new StatisticErrorForm();
model.addAttribute("statisticForm", statisticForm);
return "statisticError";
}
@RequestMapping(method = RequestMethod.POST)
public String statistiqueResult(@Valid @ModelAttribute StatisticErrorForm statisticForm, BindingResult result, ModelMap model, HttpServletRequest request,
HttpServletResponse response) {
if (!result.hasFieldErrors() && !result.hasErrors()) {
request.setAttribute("startDate", statisticForm.getStartDate());
request.setAttribute("endDate", statisticForm.getEndDate());
statisticForm.setSearchDone(true);
}
model.addAttribute(statisticForm);
return "statisticError";
}
}
servlet 控制器
@Controller
@RequestMapping("/statError.jpg")
public class ImageErrorController {
@Autowired
private IUserService userService;
@RequestMapping(method = RequestMethod.GET)
public void generateChart(HttpServletRequest request,
HttpServletResponse response) {
if (request.getAttribute("startDate") != null && request.getAttribute("endDate") != null) {
response.setContentType("image/jpg");
AxisChart axisChart = userService.generateChart();
ServletEncoderHelper.encodeJPEG(axisChart, 1.0f, response);
}
}
有没有办法将用户输入的值发送到 imageErrorController？ 将模型添加到generateChart？
user enter two date
it need to click on a button...
if the date are valid, the same jsp page is called and some value are setted in the request... in this jsp, if setSeachDone is true, a chart is generate...
another servled controller is called for the image... but the value already setted in the request are empty
@Controller
@RequestMapping("/statError")
public class StatisticError {
@Autowired
private IUserService userService;
@InitBinder("statisticForm")
protected void initBinder(WebDataBinder binder) {
binder.setValidator(new StatisticErrorFormValidator());
}
@RequestMapping(method = RequestMethod.GET)
public String statistic(Model model) {
StatisticErrorForm statisticForm = new StatisticErrorForm();
model.addAttribute("statisticForm", statisticForm);
return "statisticError";
}
@RequestMapping(method = RequestMethod.POST)
public String statistiqueResult(@Valid @ModelAttribute StatisticErrorForm statisticForm, BindingResult result, ModelMap model, HttpServletRequest request,
HttpServletResponse response) {
if (!result.hasFieldErrors() && !result.hasErrors()) {
request.setAttribute("startDate", statisticForm.getStartDate());
request.setAttribute("endDate", statisticForm.getEndDate());
statisticForm.setSearchDone(true);
}
model.addAttribute(statisticForm);
return "statisticError";
}
}
the servlet controller
@Controller
@RequestMapping("/statError.jpg")
public class ImageErrorController {
@Autowired
private IUserService userService;
@RequestMapping(method = RequestMethod.GET)
public void generateChart(HttpServletRequest request,
HttpServletResponse response) {
if (request.getAttribute("startDate") != null && request.getAttribute("endDate") != null) {
response.setContentType("image/jpg");
AxisChart axisChart = userService.generateChart();
ServletEncoderHelper.encodeJPEG(axisChart, 1.0f, response);
}
}
is there a way to send the value entered by the user to the imageErrorController?
add the model to generateChart?
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（1）
您需要将它们作为视图中图像 URL 的参数传递，如下所示：
You need to pass them as parameters of image URL in your view, like this: