jsp页面中有关向controller中请求数据路径中带..的问题

卞俊哲
2023-12-01

直接上代码以及跳转思路(不想看代码的直接看思路)

跳转思路

  1. 首页有一个按钮会访问controller中的system/login是一个get请求
  2. SystemController会将其解析views里的system/login.jsp
  3. 这个login.jsp会发送一个post的login到刚才的controller也就是(SystemController)中找
  4. 这个controller(SystemController)如果验证成功会返回一个success数据给system/login.jsp
  5. 这个jsp页面通过window.parent.location = ‘index’;又去找controller(SystemController)
  6. (SystemController)又通过视图解析器到了system.index.jsp
  7. 在这个jsp中的标签中有一个href,他是这样写的href="…/home/index",这个刚开始由于从来没有遇到过这样写的,百思不得其解,然后慢慢发现也是找controller
  8. 首先,当前jsp页面是由SystemController中的@RequestMapping(value="/index",method=RequestMethod.GET)解析来的,这里的…代表上一级RequestMapping,也就是类上的RequestMapping--------@RequestMapping("/system"),然后找与它@RequestMapping("/system")同级的Controller,也就是找@RequestMapping("/home"),然后再找这个Controlle-----r@RequestMapping("/home")下的@RequestMapping(value="/index")
  9. 通过这个案例我们发现在Controller中的RequestMapping也是可以使用相对路径的,具体可以看我的上一个帖子。

controller代码

package com.ischoolbar.programmer.controller.admin;

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
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.ischoolbar.programmer.entity.admin.Authority;
import com.ischoolbar.programmer.entity.admin.Menu;
import com.ischoolbar.programmer.entity.admin.Role;
import com.ischoolbar.programmer.entity.admin.User;
import com.ischoolbar.programmer.service.admin.AuthorityService;
import com.ischoolbar.programmer.service.admin.LogService;
import com.ischoolbar.programmer.service.admin.MenuService;
import com.ischoolbar.programmer.service.admin.RoleService;
import com.ischoolbar.programmer.service.admin.UserService;
import com.ischoolbar.programmer.util.CpachaUtil;
import com.ischoolbar.programmer.util.MenuUtil;

/**
 * 系统操作类控制器
 * @author llq
 *
 */
@Controller
@RequestMapping("/system")
public class SystemController {
	
	@Autowired
	private UserService userService;
	
	@Autowired
	private RoleService roleService;
	
	@Autowired
	private AuthorityService authorityService;
	
	@Autowired
	private MenuService menuService;
	
	@Autowired
	private LogService logService;
	
	/**
	 * 系统登录后的主页
	 * @param model
	 * @return
	 */
	@RequestMapping(value="/index",method=RequestMethod.GET)
	public ModelAndView index(ModelAndView model,HttpServletRequest request){
		List<Menu> userMenus = (List<Menu>)request.getSession().getAttribute("userMenus");
		model.addObject("topMenuList", MenuUtil.getAllTopMenu(userMenus));
		model.addObject("secondMenuList", MenuUtil.getAllSecondMenu(userMenus));
		model.setViewName("system/index");
		return model;//WEB-INF/views/+system/index+.jsp = WEB-INF/views/system/index.jsp
	}
	
	/**
	 * 系统登录后的欢迎页
	 * @param model
	 * @return
	 */
	@RequestMapping(value="/welcome",method=RequestMethod.GET)
	public ModelAndView welcome(ModelAndView model){
		model.setViewName("system/welcome");
		return model;
	}
	/**
	 * 登陆页面
	 * @param model
	 * @return
	 */
	@RequestMapping(value="/login",method=RequestMethod.GET)
	public ModelAndView login(ModelAndView model){
		model.setViewName("system/login");
		return model;
	}
	
	/**
	 * 登录表单提交处理控制器
	 * @param user
	 * @param cpacha
	 * @return
	 */
	@RequestMapping(value="/login",method=RequestMethod.POST)
	@ResponseBody
	public Map<String, String> loginAct(User user,String cpacha,HttpServletRequest request){
		Map<String, String> ret = new HashMap<String, String>();
		if(user == null){
			ret.put("type", "error");
			ret.put("msg", "请填写用户信息!");
			return ret;
		}
		if(StringUtils.isEmpty(cpacha)){
			ret.put("type", "error");
			ret.put("msg", "请填写验证码!");
			return ret;
		}
		if(StringUtils.isEmpty(user.getUsername())){
			ret.put("type", "error");
			ret.put("msg", "请填写用户名!");
			return ret;
		}
		if(StringUtils.isEmpty(user.getPassword())){
			ret.put("type", "error");
			ret.put("msg", "请填写密码!");
			return ret;
		}
		Object loginCpacha = request.getSession().getAttribute("loginCpacha");
		if(loginCpacha == null){
			ret.put("type", "error");
			ret.put("msg", "会话超时,请刷新页面!");
			return ret;
		}
		if(!cpacha.toUpperCase().equals(loginCpacha.toString().toUpperCase())){
			ret.put("type", "error");
			ret.put("msg", "验证码错误!");
			logService.add("用户名为"+user.getUsername()+"的用户登录时输入验证码错误!");
			return ret;
		}
		User findByUsername = userService.findByUsername(user.getUsername());
		if(findByUsername == null){
			ret.put("type", "error");
			ret.put("msg", "该用户名不存在!");
			logService.add("登录时,用户名为"+user.getUsername()+"的用户不存在!");
			return ret;
		}
		if(!user.getPassword().equals(findByUsername.getPassword())){
			ret.put("type", "error");
			ret.put("msg", "密码错误!");
			logService.add("用户名为"+user.getUsername()+"的用户登录时输入密码错误!");
			return ret;
		}
		//说明用户名密码及验证码都正确
		//此时需要查询用户的角色权限
		Role role = roleService.find(findByUsername.getRoleId());
		List<Authority> authorityList = authorityService.findListByRoleId(role.getId());//根据角色获取权限列表
		String menuIds = "";
		for(Authority authority:authorityList){
			menuIds += authority.getMenuId() + ",";
		}
		if(!StringUtils.isEmpty(menuIds)){
			menuIds = menuIds.substring(0,menuIds.length()-1);
		}
		List<Menu> userMenus = menuService.findListByIds(menuIds);
		//把角色信息、菜单信息放到session中
		request.getSession().setAttribute("admin", findByUsername);
		request.getSession().setAttribute("role", role);
		request.getSession().setAttribute("userMenus", userMenus);
		ret.put("type", "success");
		ret.put("msg", "登录成功!");
		logService.add("用户名为{"+user.getUsername()+"},角色为{"+role.getName()+"}的用户登录成功!");
		return ret;
	}
	
	/**
	 * 后台退出注销功能
	 * @param request
	 * @return
	 */
	@RequestMapping(value="/logout",method=RequestMethod.GET)
	public String logout(HttpServletRequest request){
		HttpSession session = request.getSession();
		session.setAttribute("admin", null);
		session.setAttribute("role", null);
		request.getSession().setAttribute("userMenus", null);
		return "redirect:login";
	}
	
	/**
	 * 修改密码页面
	 * @param model
	 * @return
	 */
	@RequestMapping(value="/edit_password",method=RequestMethod.GET)
	public ModelAndView editPassword(ModelAndView model){
		model.setViewName("system/edit_password");
		return model;
	}
	
	@RequestMapping(value="/edit_password",method=RequestMethod.POST)
	@ResponseBody
	public Map<String, String> editPasswordAct(String newpassword,String oldpassword,HttpServletRequest request){
		Map<String, String> ret = new HashMap<String, String>();
		if(StringUtils.isEmpty(newpassword)){
			ret.put("type", "error");
			ret.put("msg", "请填写新密码!");
			return ret;
		}
		User user = (User)request.getSession().getAttribute("admin");
		if(!user.getPassword().equals(oldpassword)){
			ret.put("type", "error");
			ret.put("msg", "原密码错误!");
			return ret;
		}
		user.setPassword(newpassword);
		if(userService.editPassword(user) <= 0){
			ret.put("type", "error");
			ret.put("msg", "密码修改失败,请联系管理员!");
			return ret;
		}
		ret.put("type", "success");
		ret.put("msg", "密码修改成功!");
		logService.add("用户名为{"+user.getUsername()+"},的用户成功修改密码!");
		return ret;
	} 
	
	/**
	 * 本系统所有的验证码均采用此方法
	 * @param vcodeLen
	 * @param width
	 * @param height
	 * @param cpachaType:用来区别验证码的类型,传入字符串
	 * @param request
	 * @param response
	 */
	@RequestMapping(value="/get_cpacha",method=RequestMethod.GET)
	public void generateCpacha(
			@RequestParam(name="vl",required=false,defaultValue="4") Integer vcodeLen,
			@RequestParam(name="w",required=false,defaultValue="100") Integer width,
			@RequestParam(name="h",required=false,defaultValue="30") Integer height,
			@RequestParam(name="type",required=true,defaultValue="loginCpacha") String cpachaType,
			HttpServletRequest request,
			HttpServletResponse response){
		CpachaUtil cpachaUtil = new CpachaUtil(vcodeLen, width, height);
		String generatorVCode = cpachaUtil.generatorVCode();
		request.getSession().setAttribute(cpachaType, generatorVCode);
		BufferedImage generatorRotateVCodeImage = cpachaUtil.generatorRotateVCodeImage(generatorVCode, true);
		try {
			ImageIO.write(generatorRotateVCodeImage, "gif", response.getOutputStream());
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

system/login.jsp

$.ajax({
					url:'login',
					data:{username:username,password:password,cpacha:cpacha},
					type:'post',
					dataType:'json',
					success:function(data){
						if(data.type == 'success'){
							window.parent.location = 'index';
						}else{
							removeClass(document.querySelector(".login"), "active");
							removeClass(document.querySelector(".sk-rotating-plane"), "active");
							document.querySelector(".login").style.display = "block";
							alert(data.msg);
							changeCpacha();
						}
					}
				});

system/index.jsp

<div class="wu-header" data-options="region:'north',border:false,split:true">
    	<div class="wu-header-left">
        	<h1>后台管理系统</h1>
        </div>
        <div class="wu-header-right">
        	<p><strong class="easyui-tooltip" title="0条未读消息">${role.name}:${admin.username}</strong>,欢迎您!</p>
            <p><a href="../home/index" target="_blank">网站首页</a>|<a href="#">支持论坛</a>|<a href="#">帮助中心</a>|<a href="logout">安全退出</a></p>
        </div>
    </div>
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