TODOLIST完整版

1.数据库的创建：

    create table todo(
 id integer primary key,
 title varchar(50),
 todoclassid integer,
 state integer,
 create_dt datetime,
 modify_dt datetime
);
create table todoclass(
 id integer primary key,
 name varchar(30),
 parentid integer
);

2.html页面代码展示：

JAVA的TODOLIST

添加同级
添加下级

• 
  {{item.todoclass.name}}

添加

已完成 未完成 删除 {{index+1}}.{{item.title}}【{{item.create_dt}}】

结果展示：

3.Java代码部分展示

Controller层:
public class TodoController {
// xxx/todo/listtodoclasses.wst
public TodoVO listtodoclasses(HttpServletRequest req, HttpServletResponse response){
TodoService todoService=new TodoServiceImpl();
List result = todoService.listTodoClasses(null);
TodoVO todoVO=new TodoVO();
todoVO.setTodoclasses(result);
return todoVO;
}

// xxx/todo/savetodoclass.wst
public Boolean savetodoclass(HttpServletRequest req, HttpServletResponse response){
    TodoService todoService=new TodoServiceImpl();
    TodoClass todoClass=new TodoClass();
    todoClass.setName(req.getParameter("todoclassname"));
    Boolean result=todoService.saveTodoClass(todoClass);
    return result;
}

// xxx/todo/savetodo.wst
public Boolean savetodo(HttpServletRequest req, HttpServletResponse response){
    TodoService todoService=new TodoServiceImpl();
    Todo todo=new Todo();
    Date date =new Date();
    todo.setCreate_dt(date);
    todo.setState(0);
    todo.setTitle(req.getParameter("title"));
    todo.setTodoclassid(Integer.parseInt(req.getParameter("todoclassid")));
    Boolean result=todoService.saveTodo(todo);
    return result;
}

// xxx/todo/updatetodo.wst
public Boolean updatetodo(HttpServletRequest req, HttpServletResponse response){
    TodoService todoService=new TodoServiceImpl();
    Boolean result=todoService.updateTodo(Integer.parseInt(req.getParameter("id")));
    return result;
}

public Boolean deletetodo(HttpServletRequest req,HttpServletResponse response ){
    TodoService todoService=new TodoServiceImpl();
    Boolean result=todoService.deletetodo(Integer.parseInt(req.getParameter("id")));
    return result;
}

}
Service层
接口：
public interface TodoService {
/**

• 获取所有的todo分类

• @return
  */
  List listTodoClasses(Integer parentid);

  /**

• 保存Todo分类
• @param todoClass

• @return
  */
  Boolean saveTodoClass(TodoClass todoClass);

  Boolean saveTodo(Todo todo);

  Boolean updateTodo(Integer todoid);

  Boolean deletetodo(Integer todoid);
  }
  实现接口
  public class TodoServiceImpl implements TodoService {

  @Override
  public List listTodoClasses(Integer parentid) {
  SqlSession sqlSession = MybatisUtil.getInstance().getSqlSessionFactory().openSession();
  TodoDAO dao=sqlSession.getMapper(TodoDAO.class);
  List result=new ArrayList<>();
  try{
  List root = dao.listTodoClassesByParentid(parentid);
  for(TodoClass tc:root){
  TodoClassVO todoClassVO=new TodoClassVO();
  todoClassVO.setTodoclass(tc);
  todoClassVO.setTodos(dao.listTodosByClassid(tc.getId()));
  todoClassVO.setTodoclassvolist(listTodoClasses(tc.getId()));
  result.add(todoClassVO);
  }
  return result;
  }finally {
  sqlSession.close();
  }

  }

  @Override
  public Boolean saveTodoClass(TodoClass todoClass) {
  SqlSession sqlSession = MybatisUtil.getInstance().getSqlSessionFactory().openSession();
  TodoDAO dao=sqlSession.getMapper(TodoDAO.class);
  int result=0;
  try {
  result=dao.saveTodoClass(todoClass);
  sqlSession.commit();
  }finally{
  sqlSession.close();
  }
  return result>0;
  }

  @Override
  public Boolean saveTodo(Todo todo) {
  SqlSession sqlSession = MybatisUtil.getInstance().getSqlSessionFactory().openSession();
  TodoDAO dao=sqlSession.getMapper(TodoDAO.class);
  int result =0;
  try {
  result= dao.saveTodo(todo);
  sqlSession.commit();
  }finally {
  sqlSession.close();
  }

  return result>0;

  }

  @Override
  public Boolean updateTodo(Integer todoid) {
  SqlSession sqlSession = MybatisUtil.getInstance().getSqlSessionFactory().openSession();
  TodoDAO dao=sqlSession.getMapper(TodoDAO.class);
  int result =0;
  try {
  result= dao.updateTodo(todoid);
  sqlSession.commit();
  }finally {
  sqlSession.close();
  }

  return result>0;

  }

  @Override
  public Boolean deletetodo(Integer todoid) {
  SqlSession sqlSession = MybatisUtil.getInstance().getSqlSessionFactory().openSession();
  TodoDAO dao=sqlSession.getMapper(TodoDAO.class);
  int result =0;
  try {
  result= dao.deletetodo(todoid);
  sqlSession.commit();
  }finally {
  sqlSession.close();
  }

  return result>0;

  }

}
DAO层
接口：
public interface TodoDAO {
List listTodosByClassid(@Param("todoclassid") Integer todoclassid);
List listTodoClassesByParentid(@Param("parentid") Integer parentid);
int saveTodoClass(TodoClass todoClass);
int saveTodo(Todo todo);
int updateTodo(Integer todoid);
int deletetodo(Integer todoid);
}
配置文件：

PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

select from todo

todoclassid=#{todoclassid}



select from todoclass


parentid is NULL


parentid=#{parentid}





select max(ifnull(id,0))+1 from todoclass

insert into todoclass(id,name) VALUES (#{id},#{name});



select max(ifnull(id,0))+1 from todo

insert into todo(id,title,todoclassid,create_dt,state) VALUES (#{id},#{title},#{todoclassid},#{create_dt},#{state});


update todo set state=1 where id=#{id}


delete from todo where id=#{id}

转载于:https://blog.51cto.com/13507330/2108565