标签：return String 自定义 type 树形 mvc import com public
一、登录注册
1.根据MySQL中的表写实体类
package com.sjy.entity;
public class User {
private long id;
private String name;
private String pwd;
private int type;
public long getId() {
return id;
}
public void setId(int 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 User() {
super();
// TODO Auto-generated constructor stub
}
public User(long id, String name, String pwd, int type) {
super();
this.id = id;
this.name = name;
this.pwd = pwd;
this.type = type;
}
public int getType() {
return type;
}
public void setType(int type) {
this.type = type;
}
}
2.写登录和注册的dao方法
注册及增加一个用户
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"});
}
3.子控制器内调用dao方法
package com.sjy.web;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.sjy.dao.UserDao;
import com.sjy.entity.User;
import com.zking.framework.ActionSupport;
import com.zking.framework.ModelDriver;
public class UserAction extends ActionSupport implements ModelDriver<User>{
public User user=new User();
public UserDao userDao=new UserDao();
@Override
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("user", u);
} catch (Exception e) {
e.printStackTrace();
return "toLogin";
}
return "main";
}
public String register(HttpServletRequest req, HttpServletResponse resp){
try {
userDao.add(user);
req.setAttribute("msg", "用户名密码错误");
} catch (Exception e) {
e.printStackTrace();
return "Register";
}
return "toLogin";
}
}
u为null时即登录失败，重新跳到登录界面
登录成功后将用户放入session里面，方便之后用到
4.配置mvc文件
<action path="/user" type="com.sjy.web.UserAction">
<forward name="toLogin" path="/login.jsp" redirect="false" />
<forward name="Register" path="/register.jsp" redirect="true" />
<forward name="main" path="/bg/mainTemp.jsp" redirect="false" />
</action>
二、树形权限展示
1.卖家和买家需要展示不同的功能，根据表关系可分析到
type为1是管理员，2为普通用户
2.t_easyui_role_permission表中有1和2对应的功能id
3.先建立实体类 roleprimission
package com.sjy.entity;
public class RolePermission {
public RolePermission() {
super();
}
private long rid;
private long pid;
public long getRid() {
return rid;
}
public void setRid(long rid) {
this.rid = rid;
}
public long getPid() {
return pid;
}
public void setPid(long pid) {
this.pid = pid;
}
@Override
public String toString() {
return "RolePermission [rid=" + rid + ", pid=" + pid + "]";
}
}
4.根据rid查询pid
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);
}
type为之前session里面的type
5.用，将rid拼接起来
int type = user.getType();
List<RolePermission> findRolePermission = rolepd.findRolePermission(type);
StringBuffer s=new StringBuffer();
for (RolePermission f : findRolePermission) {
s.append(",").append(f.getPid());
}
String substring = s.substring(1);
s.substring(1)是将第一个，去掉
6.通过帮助类将平级数据变成有阶级关系的数据
public List<TreeVo<Permission>> tree(String ids) throws Exception {
List<Permission> list = this.listPulas(ids);
List<TreeVo<Permission>> listT=new ArrayList<TreeVo<Permission>>();
for (Permission p : list) {
TreeVo<Permission> vo=new TreeVo<Permission>();
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);
listT.add(vo);
}
return BuildTree.buildList(listT, "0");
}7.转化成json字符串
package com.sjy.web;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.sjy.dao.PermissionDao;
import com.sjy.dao.RolePermissionDao;
import com.sjy.entity.Permission;
import com.sjy.entity.RolePermission;
import com.sjy.entity.User;
import com.zking.framework.ActionSupport;
import com.zking.framework.ModelDriver;
import com.zking.util.ResponseUtil;
import com.zking.util.TreeVo;
public class PermissionAction extends ActionSupport implements ModelDriver<Permission>{
public Permission permission=new Permission();
public PermissionDao permissionDao=new PermissionDao();
RolePermissionDao rolepd=new RolePermissionDao();
@Override
public Permission getModel() {
return permission;
}
public String tree(HttpServletRequest req, HttpServletResponse resp) {
try {
User user =(User)req.getSession().getAttribute("user");
if(user==null) {
return "toLogin";
}
int type = user.getType();
List<RolePermission> findRolePermission = rolepd.findRolePermission(type);
StringBuffer s=new StringBuffer();
for (RolePermission f : findRolePermission) {
s.append(",").append(f.getPid());
}
String substring = s.substring(1);
List<TreeVo<Permission>> tree = permissionDao.tree(substring);
//List<TreeVo<Permission>> tree = permissionDao.tree(permission);
ResponseUtil.writeJson(resp, tree);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
8.配置mvc文件
<action path="/permission" type="com.sjy.web.PermissionAction">
<forward name="toLogin" path="/login.jsp" redirect="false" />
</action>9.js内配置路径
$(function(){
$("#bookMenus").tree({
url:$("#ctx").val()+"/permission.action?methodName=tree",
}）
})
就可以实现啦！！
标签：return,String,自定义,type,树形,mvc,import,com,public 来源： https://blog.csdn.net/weixin_52639224/article/details/120428254
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