项目结构图:
![](https://images2018.cnblogs.com/blog/385984/201808/385984-20180829130449464-869760623.png)
一、 添加mysql 配置
1 在pom.xml中添加 maven依赖
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
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2 在appliation.properties 文件中添加 配置项
#DB Configuration:
spring.datasource.driverClassName = com.mysql.jdbc.Driver
spring.datasource.url = jdbc:mysql://localhost:3306/dbtest?characterEncoding=utf8&useSSL=false
spring.datasource.username = root
spring.datasource.password = 123456
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
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二 、添加 jpa maven依赖
<!--jpa--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency>
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在 appliation.properties 文件中添加 配置项
#JPA Configuration spring.jpa.database = MYSQL # Show or not log for each sql query spring.jpa.show-sql = true spring.jpa.hibernate.ddl-auto=update # Naming strategy spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy # stripped before adding them to the entity manager) spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
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三 、 新建实体类 Account
package com.example.demo.domain;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class Account {
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getLogin_name() {
return login_name;
}
public void setLogin_name(String login_name) {
this.login_name = login_name;
}
public String getLogin_pwd() {
return login_pwd;
}
public void setLogin_pwd(String login_pwd) {
this.login_pwd = login_pwd;
}
public String getReal_name() {
return real_name;
}
public void setReal_name(String real_name) {
this.real_name = real_name;
}
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
private String login_name;
private String login_pwd;
private String real_name;
}
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
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@entity 实体标记注解
@Id id主键标记注解
四、创建AccountRepository 接口 继承自JPARepository
package com.example.demo.dao;
import com.example.demo.domain.Account;
import org.springframework.data.jpa.repository.JpaRepository;
import java.util.List;
public interface AccountRepository extends JpaRepository<Account,Long> {
List<Account> findAllByOrderByIdDesc();
}
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
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JPA 会自动生成AccountRepository 的实现类
五、 创建IAccountService 服务接口及实现类
IAccountService.java 接口
package com.example.demo.service;
import com.example.demo.domain.Account;
import java.util.List;
public interface IAccountService { List<Account> findAll(); Account findAccountByName(String login_name);
void Create(Account model); }
|
AccountService 实现类 ,服务类,必须标记@Service 注解,通过@autowired 自动注入 accountRepository 接口
package com.example.demo.service.impl;
import com.example.demo.dao.AccountRepository;
import com.example.demo.domain.Account;
import com.example.demo.service.IAccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class AccountService implements IAccountService {
@Autowired
AccountRepository accountRepository ;
@Override
public List<Account> findAll() {
return this.accountRepository.findAllByOrderByIdDesc();
}
@Override
public Account findAccountByName(String login_name) {
return null;
}
@Override
public void Create(Account model) {
this.accountRepository.save(model);
}
}
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
|
六、 AccountController 类
package com.example.demo.controller;
import com.example.demo.dao.AccountRepository;
import com.example.demo.domain.Account;
import com.example.demo.service.IAccountService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
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.RestController;
import java.util.List;
@Api(value = "Account api",description ="api of account")
@RestController
@RequestMapping("/account")
public class AccountController {
@Autowired
IAccountService accountService ;
@ApiOperation(value="account index list", notes = "账户列表信息")
@RequestMapping(value = "/index",method = RequestMethod.GET)
public List<Account> index(){
return this.accountService.findAll();
}
@ApiOperation(value="create a account", notes = "a account name")
@RequestMapping(value = "/create",method = RequestMethod.POST)
public void create(
@ApiParam( name="model",value = "input a account entity") @RequestBody Account model)
{
this.accountService.Create(model);
}
}
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
|
http://localhost:8080/account/index 访问所有账号,返回结果:
[{"id":7,"login_name":"admin","login_pwd":"admin","real_name":"jack"}]
http://localhost:8080/account/create 接口post 创建账号,返回结果: (这里应该做一个统一的包装类进行返回)
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