Spring MVC 3 实例

package com.cw.web; import java.util.ArrayList; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.validation.Valid; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.validation.BindingResult; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView; import com.cw.domain.Employee; import com.cw.domain.Upload; import com.cw.service.IEmployeeService; import com.cw.util.DownLoad; @Controller @RequestMapping("/employee") //访问这个类所需要的名称 public class EmployeeWeb { @Resource private IEmployeeService employeeServiceImpl; @RequestMapping(value="index.html") //如果要访问这个资源，那么action就需要先写上这个类的RequesMapping的值 加上这个方法的RequesMapping值，也就是employee/index.html public String goIndex(ModelMap model) { model.addAttribute("employee", new Employee()); return "index"; } @RequestMapping(value="/register.html",method = RequestMethod.POST,params="method=re") //处理employee/register.html请求 //下面的employee不需要在这里写get set 页面中只需要写username,password，跟Employee.java类中的属性名一样就可以了 //@Valid 这个注解是要绑定要验证的类，BindingResult这个类必须放在@Valid这个验证类的后面 public ModelAndView register(HttpServletRequest request,@ModelAttribute("employee") @Valid Employee employee,BindingResult vResult){ if (vResult.hasErrors()) { return new ModelAndView("index");//验证失败的时候，创建一个新的视图，跳转到WEB-INF/jsp/main.jsp } else { boolean result = employeeServiceImpl.saveEmployee(employee); if(result) { request.getSession().setAttribute("employee", employee); return new ModelAndView("main");//创建一个新的视图，跳转到WEB-INF/jsp/main.jsp }else { return new ModelAndView("login");//自己理解，跟上面一样 } } } @RequestMapping(value="/checkUsername.html",method = RequestMethod.POST)//处理employee/checkUsername.html的post请求 //@ResponseBody 这个注解的作用就是让这个方法放回的对象转换成json对象 public @ResponseBody boolean checkUsername(HttpServletRequest request,String username){ boolean result = employeeServiceImpl.findUsername(username); return result; } @RequestMapping(value="/viewFile.html") public String viewFile(HttpServletRequest request){ ArrayList<Upload> upload = employeeServiceImpl.findViewFile(); request.setAttribute("upload", upload); return "viewFile"; } //文件下载 @RequestMapping(value="/downLoad.html") public String downLoad(@RequestParam("path") String path,@RequestParam("filename") String filename, HttpServletRequest request, HttpServletResponse response) throws Exception { DownLoad.downLoadFile(path, filename, request, response); return null; } }