Springboot User Crud

1. Preparation

http://start.spring.io/here address to directly generate the project information you need, how you IDE and integrated springboot so you can generate project information directly

Required Knowledge: Java,spring,springmvc,thymelafe

2 start

Based on the picture project structure information, we can infer that we need to write the following classes:

1  PackageCom.dgw.boot.dgw.domain;2 3 /**4  * @authordgw-pc5 * @data July 17, 20186  */7  Public classuser{8     9     PrivateLong ID;Ten     PrivateString name; One     PrivateString Email; A      -      PublicUser () { -          the     } -      -      PublicUser (Long ID, string name, string email) { -          This. ID =ID; +          This. Name =name; -          This. email =email; +     } A  at @Override -      PublicString toString () { -         return"User [id=" + ID + ", name=" + name + ", email=" + email + "]"; -     } -  -      PublicLong getId () { in         returnID; -     } to  +      Public voidsetId (Long id) { -          This. ID =ID; the     } *  $      PublicString GetName () {Panax Notoginseng         returnname; -     } the  +      Public voidsetName (String name) { A          This. Name =name; the     } +  -      PublicString Getemail () { $         returnemail; $     } -  -      Public voidsetemail (String email) { the          This. email =email; -     }Wuyi}

Dao Beans

 Public Interfaceuserrepository {User savaorupdateuser (user user); voidDeleteUser (LongID); User Getuserbyid (LongID); List<User>listusre (); } @Repository Public classUserrepositoryimplImplementsUserrepository {Private StaticAtomiclong count=NewAtomiclong (); PrivateConcurrentmap<long, user> usemap=NewConcurrenthashmap<>(); @Override Publicuser savaorupdateuser (user user) {Long ID=User.getid (); if(id==NULL) {ID=Count.incrementandget ();        User.setid (ID); }         This. Usemap.put (ID, user); returnuser; } @Override Public voidDeleteUser (LongID) { This. Usemap.remove (ID); } @Override PublicUser Getuserbyid (LongID) {return  This. Usemap.get (ID); } @Override PublicList<user>listusre () {return NewArraylist<> ( This. Usemap.values ()); }}

Controller:

1 /**2 * Get a list of users from the user repository3      * @return4      */5     PrivateList<user>getuserlist () {6          returnUserrepository.listuser ();7     }8 9     /**Ten * Search for users One      * @return A      */ - @GetMapping -      PublicModelandview list (model model) { theModel.addattribute ("UserList", Getuserlist ()); -Model.addattribute ("title", "User Management"); -         return NewModelandview ("Users/list", "Usermodel", model); -     } +   -     /** + * Query users by ID A      * @parammessage at      * @return -      */ -@GetMapping ("{ID}") -      PublicModelandview View (@PathVariable ("id"Long ID, model model) { -User User =Userrepository.getuserbyid (ID); -Model.addattribute ("User", user); inModel.addattribute ("title", "View User"); -         return NewModelandview ("Users/view", "Usermodel", model); to     } +  -     /** the * Get Form form page *      * @paramUser $      * @returnPanax Notoginseng      */ -@GetMapping ("/form") the      PublicModelandview CreateForm (model model) { +Model.addattribute ("User",NewUser ()); AModel.addattribute ("title", "Create user"); the         return NewModelandview ("Users/form", "Usermodel", model); +     } -  $     /** $ * New User -      * @paramUser -      * @paramresult the      * @paramredirect -      * @returnWuyi      */ the @PostMapping -      PublicModelandview Create (user user) { Wuuser =userrepository.saveorupateuser (user); -         return NewModelandview ("Redirect:/users"); About     } $  -     /** - * Delete User -      * @paramID A      * @return +      */ the@GetMapping (value = "Delete/{id}") -      PublicModelandview Delete (@PathVariable ("id"Long ID, model model) { $ Userrepository.deleteuser (ID); the   theModel.addattribute ("UserList", Getuserlist ()); theModel.addattribute ("title", "Delete user"); the         return NewModelandview ("Users/list", "Usermodel", model); -     } in  the     /** the * Modify User About      * @paramUser the      * @return the      */ the@GetMapping (value = "Modify/{id}") +      PublicModelandview Modifyform (@PathVariable ("id"Long ID, model model) { -User User =Userrepository.getuserbyid (ID); the  BayiModel.addattribute ("User", user); theModel.addattribute ("title", "Modify user"); the         return NewModelandview ("Users/form", "Usermodel", model); -}

Springboot User Crud