SpringMVC 传参、重定向、文件上传

阳光穿透心脏的1/2处 2024-02-18 15:39 3阅读 0赞

package com.dw.controller;
    
    import java.io.UnsupportedEncodingException;
    
    import javax.annotation.Resource;
    import javax.servlet.ServletRequest;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.springframework.http.HttpRequest;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.RequestAttribute;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.servlet.ModelAndView;
    import org.springframework.web.servlet.mvc.support.RedirectAttributes;
    
    import com.dw.entity.Person;
    import com.dw.service.PersonService;
    
    @Controller
    public class PersonController {
    	@Resource
    	private PersonService personService;
    
    	@RequestMapping("/toAdd")
    	public ModelAndView toAdd(){
    		ModelAndView modelAndView = new ModelAndView();
    		modelAndView.setViewName("toAdd");		
    		return modelAndView;
    	}
    	
    	@RequestMapping("/toUpdate")
    	public String toUpdate(){
    		return "toUpdate";
    	}
    
    	/*
    	 * 通过request来接受表单传递的参数
    	 */
    	/*
    	@RequestMapping("/doAdd")
    	public String doAdd(HttpServletRequest request,HttpServletResponse response) throws UnsupportedEncodingException{
    		request.setCharacterEncoding("utf-8");
    		String name = request.getParameter("name");
    		Person person = new Person();
    		person.setName(name);
    		personService.add(person);
    		request.setAttribute("name", name);
    		return "doAddOk";
    	}
    	*/
    	
    	/*
    	 * 当form提交参数与此不一致时，可以通过@RequestParam来设定，其中参数value和name效果相同，选择其一即可。
    	 * Model 可以设置传输数据，可以通过EL表达式取出参数值，在web.xml中配置filter过滤器解决中文乱码问题
    	 */
    	/*
    	@RequestMapping("/doAdd")
    	public String doAdd(@RequestParam(required=true,value="name") String name1,Model model){
    		Person person = new Person();
    		person.setName(name1);
    		personService.add(person);	
    		model.addAttribute("name",name1);
    		return "doAddOk";
    	}
    	*/
    	
    	
    	/*
    	 * 通过对象接受传递的参数，要求表单参数名与对象模型字段一致
    	 */
    	@RequestMapping("/doAdd")
    	public String toAdd(Person person,Model model){
    		model.addAttribute("name", person.getName());
    		return "doAddOk";
    	}
    	
    	/*
    	 * 重定向
    	 */
    	/*
    	@RequestMapping("/doAdd")
    	public String doAdd(String name,RedirectAttributes attr){
    		Person person = new Person();
    		person.setName(name);
    		personService.add(person);	
    		attr.addFlashAttribute("name", name);
    		return "redirect:toShow.do";
    	}	
    	
    	@RequestMapping("/toShow")
    	public String toShow(){
    		return "toShow";
    	}
    	*/
    }

过滤器-解决乱码问题，在web.xml中配置：

<filter>  
            <filter-name>characterEncodingFilter</filter-name>  
            <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  
            <init-param>  
                <param-name>encoding</param-name>  
                <param-value>UTF-8</param-value>  
            </init-param>
            <init-param>
                <param-name>forceEncoding</param-name>
                <param-value>true</param-value>
            </init-param>  
        </filter>  
        <filter-mapping>  
            <filter-name>characterEncodingFilter</filter-name>  
            <url-pattern>/*</url-pattern> 
        </filter-mapping>

文件上传：

controller代码：

@RequestMapping("/upFile")
    	public String upFile(@RequestParam("upfile") MultipartFile upfile,HttpServletRequest request) throws IllegalStateException, IOException{
    		String preName = upfile.getOriginalFilename();
    		String exeName = preName.substring(preName.lastIndexOf("."));
    		String newName = UUID.randomUUID().toString()+exeName;
            String path = request.getRealPath("/pic")+"/";
    		File file = new File(path+newName);
    		upfile.transferTo(file);
    		return "upFileOk";
    	}

jsp:

配置文件上传解析器：

sprinmvc.xml: