spring+springmvc+mybatis 开发JAVA单体应用
作者：叶de第柒章
这篇文章主要介绍了spring+springmvc+mybatis 开发JAVA单体应用的相关知识，本文通过图文实例代码的形式给大家介绍的非常详细 ,需要的朋友可以参考下
myshop 概述
myshop项目是根据视频教程 Java 单体应用 做的一个练习项目，目前完成了登录功能、用户管理、类别管理后续有时间会继续做其它的功能。趁着双11花了99元一年买了台阿里云服务器，演示地址>> myshop
项目地址 https://gitee.com/yehuabin/myshop
项目结构
my-shop-dependencies：管理jar包的版本，所有项目依赖此项目
my-shop-commons：项目通用工具、实体类
my-shop-domain: POJO类，对于数据库一张表
my-shop-web-admin：后台管理功能
my-shop-web-api、my-shop-web-ui：商城前端展示部分，目前还没开发
BaseDao
public interface BaseDao<T> {
int create(T model);
int update(T model);
int delete(int id);
T getById(int id);
}
BaseDao定义了通用的数据操作接口其它具体的操作接口都继承该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继承BaseDao并定义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定义通用的服务接口，T 就是某个具体的domain对象
然后给这个通用服务接口定义一个通用的实现 BaseServiceImpl。实现通用的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),"新增失败");
}
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),"更新失败");
}
public BaseResult delete(int id) {
return getBaseResult(dao.delete(id),"删除失败");
}
private BaseResult getBaseResult(int row,String error){
BaseResult baseResult = BaseResult.success();
if(row<=0){
baseResult=BaseResult.fail(error);
}
return baseResult;
}
}
用户服务继承BaseService并扩展了两个方法
public interface UserService extends BaseService<TbUser> {
PageResult<TbUser> getByPage(PageQuery<TbUserQuery> pageQuery);
TbUser login(String userName, String password);
}
用户服务的具体实现
@Service
public class UserServiceImpl extends BaseServiceImpl<TbUser,TbUserDao> implements UserService {
@Override
public BaseResult create(TbUser tbUser) {
if (StringUtils.isBlank(tbUser.getPassword())) {
return BaseResult.fail("密码不能为空");
}
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定义了通用的列表页、表单页、删除操作的跳转
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页
if (baseResult.isSuccess()) {
return "redirect:list";
}
//失败显示错误信息
model.addAttribute("result", baseResult);
return getJspPath()+"/form";
}
protected abstract T initFormEntity();
protected String getJspPath(){
return getClass().getSimpleName().toLowerCase().replace("controller","");
}
}
任何其它模块只要继承BaseController，就可以自动跳转到列表、表单、删除等页面，可以大大减少代码量
具体的UserController只需要实现特有的业务逻辑就可以
@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();
}
}
总结
以上所述是小编给大家介绍的spring+springmvc+mybatis 开发JAVA单体应用，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！