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

本文介绍了maven工程搭建spring boot+spring mvc+jpa的示例，分享给大家，具体如下：

添加spring boot支持，引入相关包：

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

 <parent>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-starter-parent</artifactid>
 <version>1.5.9.release</version>
 </parent>
 
 <dependencies>
 
 <dependency> 
 <groupid>javax.servlet</groupid> 
 <artifactid>javax.servlet-api</artifactid> 
 <scope>provided</scope><!-- 编译需要而发布不需要的jar包 --> 
 </dependency> 
 
 <dependency> 
 <groupid>org.springframework</groupid> 
 <artifactid>spring-webmvc</artifactid> 
 </dependency> 
 
 <dependency>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-starter-web</artifactid>
 </dependency>

 <!--jpa的jar包 ，操作数据库的-->
 <dependency>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-starter-data-jpa</artifactid>
 </dependency>
 
 <dependency>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-starter-data-redis</artifactid>
 </dependency>
 
 <!--mysql驱动-->
 <dependency>
 <groupid>mysql</groupid>
 <artifactid>mysql-connector-java</artifactid>
 </dependency>
 <dependency> 
 <groupid>org.apache.shiro</groupid> 
 <artifactid>shiro-core</artifactid> 
 <version>1.2.2</version> 
 </dependency> 
 <dependency>
 <groupid>org.apache.shiro</groupid>
 <artifactid>shiro-spring</artifactid>
 <version>1.2.2</version>
 </dependency>
 <!-- shiro ehcache -->
 <dependency>
 <groupid>org.apache.shiro</groupid>
 <artifactid>shiro-ehcache</artifactid>
 <version>1.2.2</version>
 </dependency>
 </dependencies>
 <build>
 
 <plugins>
 <plugin>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-maven-plugin</artifactid>
 <executions>
 <execution>
 <goals>
 <goal>repackage</goal>
 </goals>
 </execution>
 </executions>
 </plugin>
 </plugins>
 <finalname>name</finalname>
 </build>

2、以上代码引入了spring boot。spring mvc 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：

import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.enableautoconfiguration;
import org.springframework.boot.autoconfigure.springbootapplication;
import org.springframework.data.jpa.repository.config.enablejpaauditing;
import java.io.ioexception;
import com.my.config.commonproperties;
@springbootapplication
@enableautoconfiguration
@enablejpaauditing
public class application {
 public static void main(string[] args) throws ioexception{ 
 string loc = 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，spring boot工程一般都打成jar包：

import java.io.file;
import java.io.fileinputstream;
import java.io.ioexception;
import java.util.properties;
import org.springframework.util.stringutils;

public final class commonproperties {
 
 public static final string ppt_key_app_home = "app.home";
 public static final string default_app_home = "./";

 public static final string getapphome() {
 return system.getproperty("./", "./");
 }

 public static string loadproperties2system(string location) throws ioexception {
 string configlocation = location;
 file cnf;
 if (!stringutils.haslength(location)) {
 configlocation = "./config";
 cnf = new file(configlocation);
 if (!cnf.exists() || !cnf.isdirectory()) {
 configlocation = "../config";
 cnf = new file(configlocation);
 }
 } else {
 cnf = new file(location);
 }

 file[] arg2 = cnf.listfiles();
 int arg3 = arg2.length;

 for (int arg4 = 0; arg4 < arg3; ++arg4) {
 file file = arg2[arg4];
 if (file.isfile() && file.getname().endswith(".properties")) {
 properties ppt = new properties();
 fileinputstream fi = new fileinputstream(file);
 throwable arg8 = null;

 try {
  ppt.load(fi);
  system.getproperties().putall(ppt);
 } catch (throwable arg17) {
  arg8 = arg17;
  throw arg17;
 } finally {
  if (fi != null) {
  if (arg8 != null) {
  try {
  fi.close();
  } catch (throwable arg16) {
  arg8.addsuppressed(arg16);
  }
  } else {
  fi.close();
  }
  }

 }
 }
 }

 return configlocation;
 }

 public static string getversion(class<?> clazz) {
 package pkg = clazz.getpackage();
 string ver = pkg != null ? pkg.getimplementationversion() : "undefined";
 return ver == 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spring mvc的spring.xml配置文件：

import org.springframework.context.annotation.componentscan;
import org.springframework.context.annotation.configuration;

@configuration
@componentscan(basepackages = {
 "com.my.rs",
 "com.my.service",
 "com.my.repository"})
public class appautoconfiguration {

}

import org.springframework.boot.autoconfigure.web.httpmessageconverters;
import org.springframework.context.annotation.bean;
import org.springframework.context.annotation.configuration;
import org.springframework.web.servlet.config.annotation.resourcehandlerregistry;
import org.springframework.web.servlet.config.annotation.webmvcconfigureradapter;

/**
 * 预配置
 * */
@configuration
public class myconfiguration extends webmvcconfigureradapter{

 @bean
 public httpmessageconverters customconverters() {
 return new httpmessageconverters();
 }

 @override
 public void addresourcehandlers(resourcehandlerregistry registry) {
 //registry.addresourcehandler("/**")
 // .addresourcelocations("classpath:/meta-inf/resources/**");
 }

编写rs,service,repository

package com.my.rs;
import java.util.list;
import org.springframework.web.bind.annotation.requestbody;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestmethod;
import org.springframework.web.bind.annotation.requestparam;
import org.springframework.web.bind.annotation.responsebody;
import com.my.entity.user;

@requestmapping({"/api/user"})
public interface userrs {
 
 @requestmapping(value="/add",method={requestmethod.post})
 @responsebody
 public user saveuser(@requestbody user user);
 
 @requestmapping(value="/update",method={requestmethod.post})
 @responsebody
 public user updateuser(@requestbody user user);
 
 @requestmapping(value="/delete",method={requestmethod.post,requestmethod.delete})
 public void deleteuser(@requestparam string[] userids);
 
 @requestmapping(value="/get",method={requestmethod.get})
 @responsebody
 public user getuser(@requestparam string userid);
 
 @requestmapping(value="/query/all",method={requestmethod.get})
 public list<user> queryall();
 
 @requestmapping(value="/query/byname",method={requestmethod.get})
 public list<user> querybyname(@requestparam string name);
 
 @requestmapping(value="/query/byparentid",method={requestmethod.get})
 public list<user> querychildren(@requestparam string parentid);
 //无参数分页查询
 @requestmapping(value="/query/page",method={requestmethod.get})
 public list<user> querybypage(@requestparam int pageno,
 @requestparam int pagesize,
 @requestbody(required=false) user user);
}

package com.my.rs.impl;

import java.util.list;

import org.slf4j.logger;
import org.slf4j.loggerfactory;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.web.bind.annotation.requestbody;
import org.springframework.web.bind.annotation.restcontroller;

import com.my.entity.user;
import com.my.rs.userrs;
import com.my.service.userservice;

@restcontroller
public class userrsimpl implements userrs{

 public static logger logger = loggerfactory.getlogger(userrsimpl.class);
 
 @autowired
 userservice _userservice;
 
 @override
 public user saveuser(@requestbody user user){
 try {
 return _userservice.save(user);
 } catch (throwable e) {
 logger.error(e.getmessage(),e);
 throw e;
 }
 }

 @override
 public user updateuser(@requestbody user user) {
 return _userservice.update(user);
 }

 @override
 public void deleteuser(string[] userids) {
 for (string userid : userids) {
 _userservice.deletebyid(userid);
 }
 }

 @override
 public list<user> queryall() {
 return _userservice.queryall();
 }

 @override
 public list<user> querybyname(string name) {
 return _userservice.findbyname(name);
 }

 @override
 public list<user> querychildren(string parentid) {
 return _userservice.findbyparentid(parentid);
 }

 @override
 public user getuser(string userid) {
 return _userservice.findbyid(userid);
 }

 @override
 public list<user> querybypage(int pageno, int pagesize, user user) {
 
 return null;
 }
 
}

package com.my.service;
import java.util.list;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.service;
import com.my.entity.user;
import com.my.repository.userrepository;

@service
public class userservice extends baseservice<user>{

 @autowired
 userrepository _userrepository;
 public list<user> findbyname(string name){
 return _userrepository.findbyname(name);
 }
 
 public list<user> findbyparentid(string parentid){
 return _userrepository.findbyparentid(parentid);
 } 
}

package com.my.repository;
import java.util.list;
import com.my.entity.user;
public interface userrepository extends baserepository<user>{ 
 list<user> findbyname(string name);
 list<user> findbyparentid(string parentid);
}

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：

package com.my.service;
import java.io.serializable;
import javax.persistence.entitymanager;
import javax.transaction.transactional;
import org.springframework.beans.factory.annotation.autowired;
import com.my.repository.baserepository;


/**
 * 一些共有的方法放这里
 * */
@transactional
public class baseservice<e extends serializable> {

 @autowired
 baserepository<e> _baserepository;
 
 @autowired
 entitymanager em;

 public e save(e baseunit){
 return _baserepository.saveandflush(baseunit);
 }
 
 public e update(e baseunit){
 return _baserepository.saveandflush(baseunit);
 }
 
 public void deletebyid(string id) {
 _baserepository.delete(id);
 }
 
 public java.util.list<e> queryall(){
 return _baserepository.findall();
 }
 
 public e findbyid(string id){
 return _baserepository.getone(id);
 }
}

package com.my.repository;
import java.io.serializable;
import org.springframework.data.jpa.repository.jparepository;
import org.springframework.data.repository.norepositorybean;
@norepositorybean
public interface baserepository<e> extends jparepository<e, serializable>{
}

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

package com.my.entity;

import java.util.arraylist;
import java.util.list;

import javax.persistence.entity;
import javax.persistence.manytomany;

import org.hibernate.annotations.dynamicinsert;
import org.hibernate.annotations.dynamicupdate;
import org.hibernate.validator.constraints.email;

@entity(name = "db_user")
@dynamicinsert
@dynamicupdate
public class user extends baseunit {

 /**
 * 账户状态
 */
 public static enum accountstatus {
 /**
 * 正常
 */
 enable, //
 /**
 * 停用
 */
 disable
 }

 private static final long serialversionuid = -3101319619397064425l;
 private string password;
 private string salt;
 /** 账户状态 */
 private accountstatus status;

 /** 认证邮箱 */
 @email(message = "user.email属性必须符合邮箱格式")
 private string email;

 /** 移动电话号码 */
 private string mobileno;


 /** 身份证号码 */
 private string cardid;
 
 @manytomany(targetentity=role.class)
 private list<string> roleids;

 /** 昵称。可选。 */
 private string nickname;

 public string getcardid() {
 return cardid;
 }

 public string getemail() {
 return email;
 }


 public string getmobileno() {
 return mobileno;
 }

 public string getnickname() {
 return nickname;
 }

 public string getpassword() {
 return password;
 }

 public list<string> getroleids() {
 if (roleids == null) {
 roleids = new arraylist<>();
 }
 return roleids;
 }

 public string getsalt() {
 return salt;
 }

 public accountstatus getstatus() {
 return status;
 }

 public void setcardid(string cardid) {
 this.cardid = cardid;
 }

 public void setemail(string email) {
 this.email = email;
 }

 public void setmobileno(string mobileno) {
 this.mobileno = mobileno;
 }

 public void setnickname(string nickname) {
 this.nickname = nickname;
 }

 public void setpassword(string password) {
 this.password = password;
 }

 public void setroleids(list<string> roleids) {
 this.roleids = roleids;
 }

 public void setsalt(string salt) {
 this.salt = salt;
 }

 public void setstatus(accountstatus status) {
 this.status = status;
 }
}

package com.my.entity;
import java.io.serializable;
import java.util.date;
import javax.persistence.id;
import javax.persistence.mappedsuperclass;
import javax.validation.constraints.notnull;
import javax.validation.constraints.size;
import org.springframework.data.annotation.createdby;
import org.springframework.data.annotation.createddate;
import org.springframework.data.annotation.lastmodifiedby;
import org.springframework.data.annotation.lastmodifieddate;

@mappedsuperclass
public class baseunit implements serializable {

 @id
 @notnull
 public string id;
 /**
  * 父单元id
  */
 @size(max = 32, message = "baseunit.parentid属性长度不能大于32")
 public string parentid;

 /** 父单元的类型 */
 public parenttype parenttype;

 /**
  * 单元的名称
  */
 @notnull(message = "baseunit.name属性不能为空")
 public string name;

 @createdby
 public string createby;
 
 @createddate
 public date createdate;
 
 @lastmodifiedby
 public string lastmodifiedby;  
 
 /**
  * 最后更新日期
  */
 @lastmodifieddate
 public date lastmodifieddate;

 public string getid() {
  return id;
 }
 
 public void setid(string id) {
  this.id = id;
 }

 /**
  * 获取单元的名称
  * 
  * @return 必填
  */
 public string getname() {
  return name;
 }

 /**
  * 
  * 
  * @return uuid，不含{}和-
  */
 public string getparentid() {
  return parentid;
 }

 public parenttype getparenttype() {
  return parenttype;
 }

 public string getstationid() {
  return stationid;
 }

 public string getthumbnailid() {
  return thumbnailid;
 }

 public string getcreateby() {
  return createby;
 }

 public void setcreateby(string createby) {
  this.createby = createby;
 }

 public date getcreatedate() {
  return createdate;
 }

 public void setcreatedate(date createdate) {
  this.createdate = createdate;
 }
 /**
  * 设置单元的名称
  * 
  * @param name
  *   必填
  */
 public void setname(string name) {
  this.name = name;
 }

 /**
  * 设置父单元id
  * 
  * @param parentid
  *   uuid，不含{}和-
  */
 public void setparentid(string parentid) {
  this.parentid = parentid;
 }

 public string getlastmodifiedby() {
  return lastmodifiedby;
 }

 public void setlastmodifiedby(string lastmodifiedby) {
  this.lastmodifiedby = lastmodifiedby;
 }

 public date getlastmodifieddate() {
  return lastmodifieddate;
 }

 public void setlastmodifieddate(date lastmodifieddate) {
  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。