spring+springmvc+mybatis 開發(fā)JAVA單體應(yīng)用

更新時(shí)間：2018年11月21日 11:23:38 作者：葉de第柒章

這篇文章主要介紹了spring+springmvc+mybatis 開發(fā)JAVA單體應(yīng)用的相關(guān)知識，本文通過圖文實(shí)例代碼的形式給大家介紹的非常詳細(xì) ,需要的朋友可以參考下

myshop 概述

myshop項(xiàng)目是根據(jù)視頻教程 Java 單體應(yīng)用做的一個(gè)練習(xí)項(xiàng)目，目前完成了登錄功能、用戶管理、類別管理后續(xù)有時(shí)間會(huì)繼續(xù)做其它的功能。趁著雙11花了99元一年買了臺阿里云服務(wù)器，演示地址>> myshop

項(xiàng)目地址 https://gitee.com/yehuabin/myshop

項(xiàng)目結(jié)構(gòu)

my-shop-dependencies：管理jar包的版本，所有項(xiàng)目依賴此項(xiàng)目

my-shop-commons：項(xiàng)目通用工具、實(shí)體類

my-shop-domain: POJO類，對于數(shù)據(jù)庫一張表

my-shop-web-admin：后臺管理功能

my-shop-web-api、my-shop-web-ui：商城前端展示部分，目前還沒開發(fā)

BaseDao

public interface BaseDao<T> {
 int create(T model);
 int update(T model);
 int delete(int id);
 T getById(int id);
}

BaseDao定義了通用的數(shù)據(jù)操作接口其它具體的操作接口都繼承該dao

public interface TbUserDao extends BaseDao<TbUser> {
 TbUser getByUserNameAndPasswrod(Map<String,String> param);
 List<TbUser> getByPage(PageQuery<TbUserQuery> pageQuery);
 int getCount(PageQuery<TbUserQuery> pageQuery);
}

TbUserDao繼承BaseDao并定義了自己特有的一些接口

BaseService

public interface BaseService<T extends BaseEntity> {
 BaseResult create(T model);
 T getById(int id);
 BaseResult update(T model);
 BaseResult delete(int id);
}

BaseService定義通用的服務(wù)接口，T 就是某個(gè)具體的domain對象

然后給這個(gè)通用服務(wù)接口定義一個(gè)通用的實(shí)現(xiàn) BaseServiceImpl。實(shí)現(xiàn)通用的CRUD

public abstract class BaseServiceImpl<T extends BaseEntity,D extends BaseDao<T>> implements BaseService<T> {
 @Autowired
 protected D dao;
 @Override
 public BaseResult create(T model) {
  BaseResult baseResult = EntityValidator.validate(model);
  if (!baseResult.isSuccess()) {
   return baseResult;
  }
  model.setCreated(new Date());
  model.setUpdated(new Date());
  return getBaseResult(dao.create(model),"新增失敗");
 }
 public T getById(int id) {
  return dao.getById(id);
 }
 public BaseResult update(T model)
 {
  BaseResult baseResult = EntityValidator.validate(model);
  if (!baseResult.isSuccess()) {
   return baseResult;
  }
  model.setUpdated(new Date());
  return getBaseResult(dao.update(model),"更新失敗");
 }
 public BaseResult delete(int id) {
  return getBaseResult(dao.delete(id),"刪除失敗");
 }
 private BaseResult getBaseResult(int row,String error){
  BaseResult baseResult = BaseResult.success();
  if(row<=0){
   baseResult=BaseResult.fail(error);
  }
  return baseResult;
 }
}

用戶服務(wù)繼承BaseService并擴(kuò)展了兩個(gè)方法

public interface UserService extends BaseService<TbUser> {
  PageResult<TbUser> getByPage(PageQuery<TbUserQuery> pageQuery);
  TbUser login(String userName, String password);
}

用戶服務(wù)的具體實(shí)現(xiàn)

@Service
public class UserServiceImpl extends BaseServiceImpl<TbUser,TbUserDao> implements UserService {
 @Override
 public BaseResult create(TbUser tbUser) {
  if (StringUtils.isBlank(tbUser.getPassword())) {
   return BaseResult.fail("密碼不能為空");
  }
  tbUser.setPassword(md5DigestAsHex(tbUser.getPassword()));
  return super.create(tbUser);
 }
 @Override
 public PageResult<TbUser> getByPage(PageQuery<TbUserQuery> pageQuery) {
  PageResult<TbUser> result = new PageResult<>();
  List<TbUser> list = dao.getByPage(pageQuery);
  int count=dao.getCount(pageQuery);
  result.setData(list);
  result.setRecordsTotal(count);
  result.setRecordsFiltered(count);
  return result;
 }
 @Override
 public BaseResult update(TbUser tbUser) {
  if (StringUtils.isNotBlank(tbUser.getPassword())) {
   tbUser.setPassword(md5DigestAsHex(tbUser.getPassword()));
  }
  return super.update(tbUser);
 }
 @Override
 public TbUser login(String userName, String password) {
  Map<String, String> param = new HashMap<>();
  param.put("userName", userName);
  param.put("password", md5DigestAsHex(password));
  System.out.println(param.get("password"));
  return dao.getByUserNameAndPasswrod(param);
 }
 private String md5DigestAsHex(String password){
  return DigestUtils.md5DigestAsHex(password.getBytes());
 }
}

BaseController

BaseController定義了通用的列表頁、表單頁、刪除操作的跳轉(zhuǎn)

public abstract class BaseController<T extends BaseEntity,S extends BaseService<T>> {
 @Autowired
 protected S service;
 @ModelAttribute
 public T getModel(Integer id) {
  T model=initFormEntity();
  if (id != null && id > 0) {
   model = service.getById(id);
  }
  return model;
 }
 @RequestMapping("/list")
 public String list(Model model) {
  return getJspPath()+"/list";
 }
 @RequestMapping(value = {"/create", "edit"}, method = RequestMethod.GET)
 public String form() {
  return getJspPath()+"/form";
 }
 @RequestMapping("/detail")
 public String detail() {
  return getJspPath()+"/detail";
 }
 @ResponseBody
 @RequestMapping("/delete")
 public BaseResult delete(int id) {
  return service.delete(id);
 }
 @RequestMapping(value = {"/create", "edit"}, method = RequestMethod.POST)
 public String form(T entity, Model model) {
  BaseResult baseResult;
  if (entity.getId() != null && entity.getId() > 0) {
   baseResult = service.update(entity);
  } else {
   baseResult = service.create(entity);
  }
  //新增或者修改成功返回列表頁
  if (baseResult.isSuccess()) {
   return "redirect:list";
  }
  //失敗顯示錯(cuò)誤信息
  model.addAttribute("result", baseResult);
  return getJspPath()+"/form";
 }
 protected abstract T initFormEntity();
 protected String getJspPath(){
  return getClass().getSimpleName().toLowerCase().replace("controller","");
 }
}

任何其它模塊只要繼承BaseController，就可以自動(dòng)跳轉(zhuǎn)到列表、表單、刪除等頁面，可以大大減少代碼量

具體的UserController只需要實(shí)現(xiàn)特有的業(yè)務(wù)邏輯就可以

@Controller
@RequestMapping("/user")
public class UserController extends BaseController<TbUser,UserService> {
 @ResponseBody
 @RequestMapping("/page")
 public PageResult<TbUser> page(PageQuery<TbUserQuery> pageQuery, TbUserQuery query) {
  pageQuery.setQuery(query);
  PageResult<TbUser> tbUsers = service.getByPage(pageQuery);
  return tbUsers;
 }
 @Override
 protected TbUser initFormEntity() {
  return new TbUser();
 }
}

總結(jié)

以上所述是小編給大家介紹的spring+springmvc+mybatis 開發(fā)JAVA單體應(yīng)用，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對腳本之家網(wǎng)站的支持！

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