上篇演示了通過Maven構(gòu)建Spring Boot 項(xiàng)目，引用web模塊啟動(dòng)應(yīng)用滋戳，完成簡(jiǎn)單的web 應(yīng)用訪問，本章內(nèi)容在此基礎(chǔ)上面加入數(shù)據(jù)訪問與端口修改晌柬，下文代碼與演例(本用例純手工測(cè)試通過刺下，放心入坑)绑嘹。
修改默認(rèn)端口
- 在src\main\resources下加入application.properties內(nèi)容如下
server.port=8888
項(xiàng)目目錄結(jié)構(gòu)
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- 啟動(dòng)應(yīng)用,日志顯示：
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端口已經(jīng)由默認(rèn)的8080 變更為8888
JPA訪問mysql數(shù)據(jù)庫
- POM中加入
<!-- Spring Boot JPA -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>RELEASE</version>
</dependency>
<!-- MYSQL -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
- 在src\test\resources下加入application.properties內(nèi)容如下(正式應(yīng)用中請(qǐng)把配置加入至src\main\resources下application.properties中):
server.port=8888
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=dbuser
spring.datasource.password=dbpass
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.properties.hibernate.hbm2ddl.auto=create-drop
- create : 會(huì)根據(jù)你的model類來生成表,但是每次運(yùn)行都會(huì)刪除上一次的表,重新生成表,哪怕2次沒有任何改變 (生產(chǎn)禁用,不小心用了會(huì)哭的。橘茉。)
- create-drop : 根據(jù)model類生成表,但是sessionFactory一關(guān)閉,表就自動(dòng)刪除 (生產(chǎn)禁用)
- update : 最常用的屬性工腋，也根據(jù)model類生成表,即使表結(jié)構(gòu)改變了,表中的行仍然存在,不會(huì)刪除以前的行
- validate : 只會(huì)和數(shù)據(jù)庫中的表進(jìn)行比較,不會(huì)創(chuàng)建新表,但是會(huì)插入新值
- 新建實(shí)體
src\main\java\com\entity\User.java
package com.entity;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import java.io.Serializable;
@Entity
@Table(name="t_user")
public class User implements Serializable {
private static final long serialVersionUID = -3258839839160856613L;
@Id
@GeneratedValue
private Long id;
private String name;
private String moblie;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getMoblie() {
return moblie;
}
public void setMoblie(String moblie) {
this.moblie = moblie;
}
}
- 新建數(shù)據(jù)訪問接口(JPA)
src\main\java\com\dao\UserRepository .java
package com.dao;
import entity.User;
import org.springframework.data.jpa.repository.JpaRepository;
/**
* Description:
* date: 2017/3/15 16:28
*/
public interface UserRepository extends JpaRepository<User, Long> {
User findByName(String name);
}
從源碼上面可以看出，JpaRepository已經(jīng)實(shí)現(xiàn)了save(更新與保存)畅卓、delete擅腰、getOne、findAll等方法翁潘，所以對(duì)于基礎(chǔ)數(shù)據(jù)的操作趁冈，接口上不需要再定義，直接使用就好拜马。
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
package org.springframework.data.jpa.repository;
import java.io.Serializable;
import java.util.List;
import org.springframework.data.domain.Example;
import org.springframework.data.domain.Sort;
import org.springframework.data.repository.NoRepositoryBean;
import org.springframework.data.repository.PagingAndSortingRepository;
import org.springframework.data.repository.query.QueryByExampleExecutor;
@NoRepositoryBean
public interface JpaRepository<T, ID extends Serializable> extends PagingAndSortingRepository<T, ID>, QueryByExampleExecutor<T> {
List<T> findAll();
List<T> findAll(Sort var1);
List<T> findAll(Iterable<ID> var1);
<S extends T> List<S> save(Iterable<S> var1);
void flush();
<S extends T> S saveAndFlush(S var1);
void deleteInBatch(Iterable<T> var1);
void deleteAllInBatch();
T getOne(ID var1);
<S extends T> List<S> findAll(Example<S> var1);
<S extends T> List<S> findAll(Example<S> var1, Sort var2);
}
4.編寫對(duì)應(yīng)的單元測(cè)試來驗(yàn)證編寫的內(nèi)容是否正確
- POM中加入
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
- 創(chuàng)建單元測(cè)試用例
src\test\java\UserTest.java
import com.SampleController;
import com.dao.UserRepository;
import com.entity.User;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
/**
* date: 2017/3/15 17:21
*/
@RunWith(SpringRunner.class)
@SpringBootTest(classes = SampleController.class)
public class UserTest {
@Autowired
private UserRepository userRepository;
@Test
public void saveTest() {
User user = new User();
user.setName("王大錘");
user.setMoblie("13300000000");
userRepository.save(user);
Assert.assertEquals("13300000000", userRepository.findByName("王大錘").getMoblie());
}
}
運(yùn)行結(jié)果示例
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參考資料：
http://docs.spring.io/spring-boot/docs/1.5.2.RELEASE/reference/htmlsingle/
