前言：给大家讲解EasyUi项目《网上书城》
*权限：不同用户登录时，树形菜单会展示出不同的效果
码字不易，点个关注
转载请说明！
开发工具:eclipse，MySQL
思维导图：
目录
1、目标
1、登录、注册
2、权限树形展示（不同用户登录时，树形菜单会展示出不同的效果）
2、思路，代码以及效果展示
1、登录、注册
1、在实体类entity创建user类
2、在dao层中写好相应的方法（登录login、注册register方法）
3、然后在子控制器中写好对应的方法。
4、最后到配置文件中xml写好相应路径
user实体类
public class User {
private long id;
private String name;
private String pwd;
private int type;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
public int getType() {
return type;
}
public void setType(int type) {
this.type = type;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", pwd=" + pwd + ", type=" + type + "]";
}
}dao层
public User login(User user) throws Exception {
String sql = "select * from t_easyui_user where name = '"+user.getName()+"' and pwd = '"+user.getPwd()+"'";
return super.executeQuery(sql, User.class, null).get(0);
}
public void add(User user) throws Exception {
String sql = "insert into t_easyui_user(name,pwd) values(?,?)";
super.executeUpdate(sql, user, new String[] {"name","pwd"});
}子控制器层
public class UserAction extends ActionSupport implements ModelDriver<User> {
private User user = new User();
private UserDao userDao = new UserDao();
public User getModel() {
return user;
}
public String login(HttpServletRequest req, HttpServletResponse resp) {
try {
User u = userDao.login(user);
if(u == null) {
return "toLogin";
}
req.getSession().setAttribute("cuser", u);
} catch (Exception e) {
e.printStackTrace();
return "toLogin";
}
//只要数据库中有这个用户就跳转到主界面
return "main";
}
public String register(HttpServletRequest req, HttpServletResponse resp) {
try {
userDao.add(user);
req.setAttribute("mag", "用户名密码错误");
} catch (Exception e) {
e.printStackTrace();
return "toRegister";
}
//如果注册成功，跳转到登录界面
return "toLogin";
}
}
配置文件hpw.xml写好相应路径
<action type="com.hpw.web.UserAction" path="/user">
<forward path="/bg/mainTemp.jsp" redirect="false" name="main"/>
<forward path="/login.jsp" redirect="true" name="toLogin"/>
<forward path="/register.jsp" redirect="false" name="toRegister"/>
</action>2、权限
2.1、user表中type中1为商家，2为买家
可以根据用户的type值来登录不同的界面
2.2、实现权限登录的思路
1、将两个表关联起来，其中Permission中的id与pid行成主外键关系，RolePermission中的rid与 pid行成父子关系。
2、从两个表中得到type对应的菜单号将其显示
2.3、代码
PermissionDao:
public List<Permission> list(Permission permission, PageBean pageBean) throws Exception {
String sql = "select * from t_easyui_Permission where 1=1";
return super.executeQuery(sql, Permission.class, pageBean);
}
public List<Permission> listPlus(String ids) throws Exception {
//ids="1,2,3,4,5,6,7,8,9,14";
String sql = "select * from t_easyui_Permission where id in ("+ids+")";
return super.executeQuery(sql, Permission.class, null);
}
public List<TreeVo<Permission>> tree(Permission permission, PageBean pageBean) throws Exception {
List<Permission> list = this.list(permission, pageBean);
List<TreeVo<Permission>> listVo = new ArrayList<TreeVo<Permission>>();
for (Permission p : list) {
TreeVo<Permission> vo = new TreeVo<>();
vo.setId(p.getId() + "");
vo.setText(p.getName());
vo.setParentId(p.getPid() + "");
Map<String, Object> map = new HashMap<String, Object>();
map.put("self", p);
vo.setAttributes(map);
listVo.add(vo);
}
return BuildTree.buildList(listVo, "0");
}
public List<TreeVo<Permission>> treePuls(String ids) throws Exception {
List<Permission> list = this.listPlus(ids);
List<TreeVo<Permission>> listVo = new ArrayList<TreeVo<Permission>>();
for (Permission p : list) {
TreeVo<Permission> vo = new TreeVo<>();
vo.setId(p.getId() + "");
vo.setText(p.getName());
vo.setParentId(p.getPid() + "");
Map<String, Object> map = new HashMap<String, Object>();
map.put("self", p);
vo.setAttributes(map);
listVo.add(vo);
}
return BuildTree.buildList(listVo, "0");
}PermissionAction:
public class PermissionAction extends ActionSupport implements ModelDriver<Permission> {
Permission permission = new Permission();
PermissionDao permissionDao = new PermissionDao();
UserDao userDao = new UserDao();
RolePermissionDao rolePermissionDao = new RolePermissionDao();
public Permission getModel() {
return permission;
}
public String tree(HttpServletRequest req, HttpServletResponse resp) {
try {
User cuser = (User) req.getSession().getAttribute("cuser");
if(cuser == null) {
return "toLogin";
}
int type = cuser.getType();
List<RolePermission> findRolePermissions = rolePermissionDao.findRolePermission(type);
StringBuffer sb = new StringBuffer();
for (RolePermission rp : findRolePermissions) {
sb.append(",").append(rp.getPid());
}
//ids="1,2,3,4,5,6,7,8,9,14";
//List<Permission> listPlus = permissionDao.listPlus(sb.substring(1));
List<TreeVo<Permission>> treePuls = permissionDao.treePuls(sb.substring(1));
//List<TreeVo<Permission>> tree = permissionDao.tree(null, null);
ResponseUtil.writeJson(resp, treePuls);
} catch (Exception e) {
e.printStackTrace();
try {
ResponseUtil.writeJson(resp, "0");
} catch (IOException e1) {
e1.printStackTrace();
}
}
return null;
}
}
RolePermissionDao：
package com.zking.dao;
import java.util.List;
import com.hpw.entity.RolePermission;
import com.hpw.util.BaseDao;
public class RolePermissionDao extends BaseDao<RolePermission> {
/**
* 通过user表中的type字段进行查询，查询出商家/买家对应的菜单ID
* @param type
* @return
* @throws Exception
*/
public List<RolePermission> findRolePermission(int type) throws Exception {
String sql = "select * from t_easyui_role_Permission where rid = "+type;
return super.executeQuery(sql, RolePermission.class, null);
}
}
效果展示:
买家身份登陆
商家身份登陆
到这里就结束了，其中重点是权限登录，当中的逻辑比较复杂
欢迎大佬指点