springboot学习笔记(三)使用JDBC以及整合spring data jpa

spring boot JDBC的使用：

1.引入依赖 <dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>2.数据库连接配置
编辑 application.properties

加入spring.datasource.url=jdbc:mysql://192.9.8.144:3306/eym_lib?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull
spring.datasource.name=eym_lib
spring.datasource.username=xxxxx
spring.datasource.password=xxxx
spring.datasource.max-wait=10000
spring.datasource.max-active=50
spring.datasource.min-idle=2

ok  现在可以使用jdbc了：

@RequestMapping("/jdbc")
public void testJDBC(){

String sql = "SELECT t.approvalBy,t.approvalDate,t.id,t.keywords FROM ym_manuscript t ";

List<Map<String, Object>> list= jdbcTemplate.queryForList(sql);
System.out.println(list.size());
}输出60  与测试库一致。

spring boot 整合spring data jap

1.引入依赖：

完整pom文件如下：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>

<groupId>com.springboot</groupId>
<artifactId>Test_myspringboot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>Test_myspringboot</name>
<url>http://maven.apache.org</url>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.3.RELEASE</version>
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
</dependency>

<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
</dependency>

<!--data source spring data jpa 需要用c3p0 连接池-->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>

</dependencies>

</project>


配置spring data jpa 连接池：
application.properties

完整资源文件如下：

logging.file=log.log
logging.level.com.xiaofangtech.sunt.controller = debug
logging.level.com.xiaofangtech.sunt.helper = warn

spring.datasource.url=jdbc:mysql://192.9.8.144:3306/eym_lib?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull
spring.datasource.name=eym_lib
spring.datasource.username=root
spring.datasource.password=
spring.datasource.max-wait=10000
spring.datasource.max-active=50
spring.datasource.min-idle=2

spring.data.jpa.repositories.enabled=true
spring.jpa.database-platform=org.hibernate.dialect.MySQL5Dialect
spring.jpa.hibernate.naming-strategy=org.hibernate.cfg.DefaultNamingStrategy
spring.jpa.generate-ddl=false
spring.jpa.show-sql=true
spring.jpa.hibernate.naming_strategy=org.hibernate.cfg.DefaultNamingStrategy
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
编写与数据库对应的实体:

代码如下：

package com.springboot.Test_myspringboot;

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Table;

/**
* 投诉实体
*
* @author xuchuang
* @version 1.0
* @created 2017-10-10 16:28:32
*/
@Entity
@Table(name = "ym_complaint")
public class Complaint extends BaseEntity {

private static final long serialVersionUID = -5244547508593077581L;

@Column(name = "title", nullable = false)
private String title;

@Column(name = "qq")
private String qq;

@Column(name = "mobile")
private String mobile;

@Column(name = "email")
private String email;

@Column(name = "link")
private String link;

@Column(name = "details", nullable = false)
private String details;

@Column(name = "fileId")
private String fileId;

@Column(name = "createdDate")
private Date createdDate;

@Column(name = "handledBy")
private String handledBy;

@Column(name = "handledDate")
private Date handledDate;

@Column(name = "handledDetails")
private String handledDetails;

@Column(name = "status")
private String status;

public Complaint() {

}

public String getHandledDetails() {
return handledDetails;
}

public void setHandledDetails(String handledDetails) {
this.handledDetails = handledDetails;
}

public String getFileId() {
return fileId;
}

public void setFileId(String fileId) {
this.fileId = fileId;
}

public String getTitle() {
return title;
}

public void setTitle(String title) {
this.title = title;
}

public String getQq() {
return qq;
}

public void setQq(String qq) {
this.qq = qq;
}

public String getMobile() {
return mobile;
}

public void setMobile(String mobile) {
this.mobile = mobile;
}

public String getEmail() {
return email;
}

public void setEmail(String email) {
this.email = email;
}

public String getLink() {
return link;
}

public void setLink(String link) {
this.link = link;
}

public String getDetails() {
return details;
}

public void setDetails(String details) {
this.details = details;
}

public Date getCreatedDate() {
return createdDate;
}

public void setCreatedDate(Date createdDate) {
this.createdDate = createdDate;
}

public String getHandledBy() {
return handledBy;
}

public void setHandledBy(String handledBy) {
this.handledBy = handledBy;
}

public Date getHandledDate() {
return handledDate;
}

public void setHandledDate(Date handledDate) {
this.handledDate = handledDate;
}

public String getStatus() {
return status;
}

public void setStatus(String status) {
this.status = status;
}

}

编写对应试题的核心仓储类：如下：
/**
* Test_myspringboot
* JpaTest.java
*/
package com.springboot.Test_myspringboot;

import java.io.Serializable;

import org.springframework.data.jpa.repository.JpaRepository;

/**
* @author xuchuang
* @updateTime 2017年12月20日 下午5:25:41
*/
public interface JpaTest extends JpaRepository<Complaint,Serializable>{

}


ok，基本配置完毕，来测是一发：

@RequestMapping("/jpa")
public void testJpa(){
List<Complaint> list= jpatest.findAll();
System.out.println(list.size());

}

访问 localhost:6366/jpa



成功拿到数据！ 及此 jdbc与springdatajpa的helloword 测试完毕!