Maven工程搭建spring boot+spring mvc+JPA的示例

2023-09-17 13:58:05 345

本文介绍了Maven工程搭建springboot+springmvc+JPA的示例，分享给大家，具体如下：

添加Springboot支持，引入相关包：

1、maven工程，少不了pom.xml，springboot的引入可参考官网：


org.springframework.boot
spring-boot-starter-parent
1.5.9.RELEASE





javax.servlet
javax.servlet-api
provided



org.springframework
spring-webmvc



org.springframework.boot
spring-boot-starter-web




org.springframework.boot
spring-boot-starter-data-jpa



org.springframework.boot
spring-boot-starter-data-redis




mysql
mysql-connector-java


org.apache.shiro
shiro-core
1.2.2


org.apache.shiro
shiro-spring
1.2.2



org.apache.shiro
shiro-ehcache
1.2.2






org.springframework.boot
spring-boot-maven-plugin



repackage





name

2、以上代码引入了springboot。springmvc和jpa，以及mysql数据库的驱动jar；

编写启动类，并加装配置文件：

1、启动类如下：

importorg.springframework.boot.SpringApplication;
importorg.springframework.boot.autoconfigure.EnableAutoConfiguration;
importorg.springframework.boot.autoconfigure.SpringBootApplication;
importorg.springframework.data.jpa.repository.config.EnableJpaAuditing;
importjava.io.IOException;
importcom.my.config.CommonProperties;
@SpringBootApplication
@EnableAutoConfiguration
@EnableJpaAuditing
publicclassApplication{
publicstaticvoidmain(String[]args)throwsIOException{
Stringloc=CommonProperties.loadProperties2System(System.getProperty("spring.config.location"));
System.getProperties().setProperty("application.version",CommonProperties.getVersion(Application.class));
System.getProperties().setProperty("app.home",loc+"/..");
SpringApplication.run(Application.class,args);
}
}

2、配置文件的位置放到classpath外边，方便在不重新打包的情况下修改，springboot工程一般都打成jar包：

importjava.io.File;
importjava.io.FileInputStream;
importjava.io.IOException;
importjava.util.Properties;
importorg.springframework.util.StringUtils;

publicfinalclassCommonProperties{

publicstaticfinalStringPPT_KEY_APP_HOME="app.home";
publicstaticfinalStringDEFAULT_APP_HOME="./";

publicstaticfinalStringgetAppHome(){
returnSystem.getProperty("./","./");
}

publicstaticStringloadProperties2System(Stringlocation)throwsIOException{
StringconfigLocation=location;
Filecnf;
if(!StringUtils.hasLength(location)){
configLocation="./config";
cnf=newFile(configLocation);
if(!cnf.exists()||!cnf.isDirectory()){
configLocation="../config";
cnf=newFile(configLocation);
}
}else{
cnf=newFile(location);
}

File[]arg2=cnf.listFiles();
intarg3=arg2.length;

for(intarg4=0;arg4clazz){
Packagepkg=clazz.getPackage();
Stringver=pkg!=null?pkg.getImplementationVersion():"undefined";
returnver==null?"undefined":ver;
}

将配置文件放到jar包同级目录的config文件夹下，包括日志配置，application.yml文件,其他配置文件等；

编写自动配置类

用于扫描compan*,代替springmvc的spring.xml配置文件：

importorg.springframework.context.annotation.ComponentScan;
importorg.springframework.context.annotation.Configuration;

@Configuration
@ComponentScan(basePackages={
"com.my.rs",
"com.my.service",
"com.my.repository"})
publicclassAppAutoConfiguration{

}

importorg.springframework.boot.autoconfigure.web.HttpMessageConverters;
importorg.springframework.context.annotation.Bean;
importorg.springframework.context.annotation.Configuration;
importorg.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
importorg.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
*预配置
**/
@Configuration
publicclassMyConfigurationextendsWebMvcConfigurerAdapter{

@Bean
publicHttpMessageConverterscustomConverters(){
returnnewHttpMessageConverters();
}

@Override
publicvoidaddResourceHandlers(ResourceHandlerRegistryregistry){
//registry.addResourceHandler("/**")
//.addResourceLocations("classpath:/META-INF/resources/**");
}

编写rs,service,repository

packagecom.my.rs;
importjava.util.List;
importorg.springframework.web.bind.annotation.RequestBody;
importorg.springframework.web.bind.annotation.RequestMapping;
importorg.springframework.web.bind.annotation.RequestMethod;
importorg.springframework.web.bind.annotation.RequestParam;
importorg.springframework.web.bind.annotation.ResponseBody;
importcom.my.entity.User;

@RequestMapping({"/api/user"})
publicinterfaceUserRS{

@RequestMapping(value="/add",method={RequestMethod.POST})
@ResponseBody
publicUsersaveUser(@RequestBodyUseruser);

@RequestMapping(value="/update",method={RequestMethod.POST})
@ResponseBody
publicUserupdateUser(@RequestBodyUseruser);

@RequestMapping(value="/delete",method={RequestMethod.POST,RequestMethod.DELETE})
publicvoiddeleteUser(@RequestParamString[]userIds);

@RequestMapping(value="/get",method={RequestMethod.GET})
@ResponseBody
publicUsergetUser(@RequestParamStringuserId);

@RequestMapping(value="/query/all",method={RequestMethod.GET})
publicListqueryAll();

@RequestMapping(value="/query/byName",method={RequestMethod.GET})
publicListqueryByName(@RequestParamStringname);

@RequestMapping(value="/query/byParentId",method={RequestMethod.GET})
publicListqueryChildren(@RequestParamStringparentId);
//无参数分页查询
@RequestMapping(value="/query/page",method={RequestMethod.GET})
publicListqueryByPage(@RequestParamintpageNo,
@RequestParamintpageSize,
@RequestBody(required=false)Useruser);
}

packagecom.my.rs.impl;

importjava.util.List;

importorg.slf4j.Logger;
importorg.slf4j.LoggerFactory;
importorg.springframework.beans.factory.annotation.Autowired;
importorg.springframework.web.bind.annotation.RequestBody;
importorg.springframework.web.bind.annotation.RestController;

importcom.my.entity.User;
importcom.my.rs.UserRS;
importcom.my.service.UserService;

@RestController
publicclassUserRSImplimplementsUserRS{

publicstaticLoggerlogger=LoggerFactory.getLogger(UserRSImpl.class);

@Autowired
UserService_userService;

@Override
publicUsersaveUser(@RequestBodyUseruser){
try{
return_userService.save(user);
}catch(Throwablee){
logger.error(e.getMessage(),e);
throwe;
}
}

@Override
publicUserupdateUser(@RequestBodyUseruser){
return_userService.update(user);
}

@Override
publicvoiddeleteUser(String[]userIds){
for(StringuserId:userIds){
_userService.deleteById(userId);
}
}

@Override
publicListqueryAll(){
return_userService.queryAll();
}

@Override
publicListqueryByName(Stringname){
return_userService.findByName(name);
}

@Override
publicListqueryChildren(StringparentId){
return_userService.findByParentId(parentId);
}

@Override
publicUsergetUser(StringuserId){
return_userService.findById(userId);
}

@Override
publicListqueryByPage(intpageNo,intpageSize,Useruser){

returnnull;
}

}

packagecom.my.service;
importjava.util.List;
importorg.springframework.beans.factory.annotation.Autowired;
importorg.springframework.stereotype.Service;
importcom.my.entity.User;
importcom.my.repository.UserRepository;

@Service
publicclassUserServiceextendsBaseService{

@Autowired
UserRepository_userRepository;
publicListfindByName(Stringname){
return_userRepository.findByName(name);
}

publicListfindByParentId(StringparentId){
return_userRepository.findByParentId(parentId);
}
}

packagecom.my.repository;
importjava.util.List;
importcom.my.entity.User;
publicinterfaceUserRepositoryextendsBaseRepository{
ListfindByName(Stringname);
ListfindByParentId(StringparentId);
}

以上采用了分层模式，有点繁琐，但是对之后修改每层的业务逻辑比较方便

JPA相关的类如下：

packagecom.my.service;
importjava.io.Serializable;
importjavax.persistence.EntityManager;
importjavax.transaction.Transactional;
importorg.springframework.beans.factory.annotation.Autowired;
importcom.my.repository.BaseRepository;


/**
*一些共有的方法放这里
**/
@Transactional
publicclassBaseService{

@Autowired
BaseRepository_baseRepository;

@Autowired
EntityManagerem;

publicEsave(EbaseUnit){
return_baseRepository.saveAndFlush(baseUnit);
}

publicEupdate(EbaseUnit){
return_baseRepository.saveAndFlush(baseUnit);
}

publicvoiddeleteById(Stringid){
_baseRepository.delete(id);
}

publicjava.util.ListqueryAll(){
return_baseRepository.findAll();
}

publicEfindById(Stringid){
return_baseRepository.getOne(id);
}
}

packagecom.my.repository;
importjava.io.Serializable;
importorg.springframework.data.jpa.repository.JpaRepository;
importorg.springframework.data.repository.NoRepositoryBean;
@NoRepositoryBean
publicinterfaceBaseRepositoryextendsJpaRepository{
}

实体类：与数据库字段相关，需要注意下父类中的注解@MappedSuperclass

packagecom.my.entity;

importjava.util.ArrayList;
importjava.util.List;

importjavax.persistence.Entity;
importjavax.persistence.ManyToMany;

importorg.hibernate.annotations.DynamicInsert;
importorg.hibernate.annotations.DynamicUpdate;
importorg.hibernate.validator.constraints.Email;

@Entity(name="db_user")
@DynamicInsert
@DynamicUpdate
publicclassUserextendsBaseUnit{

/**
*账户状态
*/
publicstaticenumAccountStatus{
/**
*正常
*/
Enable,//
/**
*停用
*/
Disable
}

privatestaticfinallongserialVersionUID=-3101319619397064425L;
privateStringpassword;
privateStringsalt;
/**账户状态*/
privateAccountStatusstatus;

/**认证邮箱*/
@Email(message="User.email属性必须符合邮箱格式")
privateStringemail;

/**移动电话号码*/
privateStringmobileNo;


/**身份证号码*/
privateStringcardId;

@ManyToMany(targetEntity=Role.class)
privateListroleIds;

/**昵称。可选。*/
privateStringnickName;

publicStringgetCardId(){
returncardId;
}

publicStringgetEmail(){
returnemail;
}


publicStringgetMobileNo(){
returnmobileNo;
}

publicStringgetNickName(){
returnnickName;
}

publicStringgetPassword(){
returnpassword;
}

publicListgetRoleIds(){
if(roleIds==null){
roleIds=newArrayList<>();
}
returnroleIds;
}

publicStringgetSalt(){
returnsalt;
}

publicAccountStatusgetStatus(){
returnstatus;
}

publicvoidsetCardId(StringcardId){
this.cardId=cardId;
}

publicvoidsetEmail(Stringemail){
this.email=email;
}

publicvoidsetMobileNo(StringmobileNo){
this.mobileNo=mobileNo;
}

publicvoidsetNickName(StringnickName){
this.nickName=nickName;
}

publicvoidsetPassword(Stringpassword){
this.password=password;
}

publicvoidsetRoleIds(ListroleIds){
this.roleIds=roleIds;
}

publicvoidsetSalt(Stringsalt){
this.salt=salt;
}

publicvoidsetStatus(AccountStatusstatus){
this.status=status;
}
}

packagecom.my.entity;
importjava.io.Serializable;
importjava.util.Date;
importjavax.persistence.Id;
importjavax.persistence.MappedSuperclass;
importjavax.validation.constraints.NotNull;
importjavax.validation.constraints.Size;
importorg.springframework.data.annotation.CreatedBy;
importorg.springframework.data.annotation.CreatedDate;
importorg.springframework.data.annotation.LastModifiedBy;
importorg.springframework.data.annotation.LastModifiedDate;

@MappedSuperclass
publicclassBaseUnitimplementsSerializable{

@Id
@NotNull
publicStringid;
/**
*父单元ID
*/
@Size(max=32,message="BaseUnit.parentId属性长度不能大于32")
publicStringparentId;

/**父单元的类型*/
publicParentTypeparentType;

/**
*单元的名称
*/
@NotNull(message="BaseUnit.name属性不能为空")
publicStringname;

@CreatedBy
publicStringcreateBy;

@CreatedDate
publicDatecreateDate;

@LastModifiedBy
publicStringlastModifiedBy;

/**
*最后更新日期
*/
@LastModifiedDate
publicDatelastModifiedDate;

publicStringgetId(){
returnid;
}

publicvoidsetId(Stringid){
this.id=id;
}

/**
*获取单元的名称
*
*@return必填
*/
publicStringgetName(){
returnname;
}

/**
*
*
*@returnUUID，不含{}和-
*/
publicStringgetParentId(){
returnparentId;
}

publicParentTypegetParentType(){
returnparentType;
}

publicStringgetStationId(){
returnstationId;
}

publicStringgetThumbnailId(){
returnthumbnailId;
}

publicStringgetCreateBy(){
returncreateBy;
}

publicvoidsetCreateBy(StringcreateBy){
this.createBy=createBy;
}

publicDategetCreateDate(){
returncreateDate;
}

publicvoidsetCreateDate(DatecreateDate){
this.createDate=createDate;
}
/**
*设置单元的名称
*
*@paramname
*必填
*/
publicvoidsetName(Stringname){
this.name=name;
}

/**
*设置父单元ID
*
*@paramparentId
*UUID，不含{}和-
*/
publicvoidsetParentId(StringparentId){
this.parentId=parentId;
}

publicStringgetLastModifiedBy(){
returnlastModifiedBy;
}

publicvoidsetLastModifiedBy(StringlastModifiedBy){
this.lastModifiedBy=lastModifiedBy;
}

publicDategetLastModifiedDate(){
returnlastModifiedDate;
}

publicvoidsetLastModifiedDate(DatelastModifiedDate){
this.lastModifiedDate=lastModifiedDate;
}
}

配置文件：

server:
port:16800
contextPath:/

logging:
config:./config/logback.xml

spring:
http:
multipart:
enabled:false
datasource:
url:jdbc:mysql://127.0.0.1:3306/db?useUnicode=true&characterEncoding=utf-8
username:root
password:123456
driverClassName:com.mysql.jdbc.Driver
jpa:
database:MYSQL
show-sql:true
hibernate:
ddl-auto:update
jackson:
serialization:
INDENT_OUTPUT:true

#hibernate:配置了实体类维护数据库表结构的具体行为，update表示当实体类的属性发生变化时，表结构跟着更新，
这里我们也可以取值create，这个create表示启动的时候删除上一次生成的表，并根据实体类重新生成表，
这个时候之前表中的数据就会被清空；还可以取值create-drop，这个表示启动时根据实体类生成表，但是当sessionFactory关闭的时候表会被删除；
validate表示启动时验证实体类和数据表是否一致；none表示啥都不做。
#show-sql表示hibernate在操作的时候在控制台打印真实的sql语句
#jackson表示格式化输出的json字符串

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

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Maven工程搭建spring boot+spring mvc+JPA的示例

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