微服务，微架构[二]之springboot集成jdbc

一、在配置连接数据源连接池springboot支持多种方式C3P0，DruidDataSource，c3p0，proxool等等，Druid连接池是采用java编写，在国内使用比较多，同时也经历了很多项目的实战，所以本次演示采用Druid连接池来处理数据源的连接

二、在连接数据源中，一般我们会采用两种方式处理

         1、DataSource方式

         2、Jndi方式

         本文重点采用DataSource方式进行配置，完成本文实例，由于需要对数据操作，本文演示接口采用html方式进行增删改查页面操作

三、关键性：相关参数数据源配置说明

         #1.基础配置

         数据库连接池配置

         spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
         spring.datasource.url=jdbc:mysql://localhost:3306/boot
         spring.datasource.username=root
         spring.datasource.password=123456
         spring.datasource.driver-class-name=com.mysql.jdbc.Driver

         #2.扩展配置

         初始化连接数量

         spring.datasource.initialSize=5

         最小空闲连接数

         spring.datasource.minIdle=5

         最大空闲连接数

         spring.datasource.maxActive=20

         最大等待毫秒时间

         spring.datasource.maxWait=60000
         spring.datasource.timeBetweenEvictionRunsMillis=60000
         spring.datasource.minEvictableIdleTimeMillis=300000
         spring.datasource.validationQuery=SELECT 1 FROM DUAL
         spring.datasource.testWhileIdle=true
         spring.datasource.testOnBorrow=false
         spring.datasource.testOnReturn=false
         spring.datasource.poolPreparedStatements=true
         spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
         spring.datasource.filters=stat,wall,log4j

         spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

四、服务器tomcat配置说明

         # tomcat端口号
         server.port=80

         # tomcat项目名称定义

         server.context-path=/eshengtai

五、java代码展示

        1、初始化脚本

DROP TABLE IF EXISTS `eshengtai`;
CREATE TABLE `eshengtai` (
`id` int(11) NOT NULL,
`name` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

[/code]         2、java实体类

/**
* @Title: Demo.java
* @Package com.didispace.bean
* Copyright: Copyright (c) 2015
* @author: abc
* @date: 2017年1月16日 上午11:15:05
*
*/
package com.didispace.bean;

public class eshengtai {

private Integer id;
private String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}

}

[/code]
3、service接口和实现类

package com.didispace.service;

import java.util.List;

import com.didispace.bean.eshengtai;

/**
* @author e生态
* @version 1.0.0
* @date 16/3/17 下午7:04.
* @blog http://blog.csdn.net/ysl_228
*/
public interface UserService {

/**
* 新增一个用户
* @param name
* @param age
*/
void create(String name, Integer age);

/**
* 根据name删除一个用户高
* @param name
*/
void deleteByName(String name);

/**
* 获取用户总量
*/
Integer getAllUsers();

/**
* 删除所有用户
*/
void deleteAllUsers();

/**
* 获取所有数据
* @Title: selectAll
* @return
*
*/
public List<eshengtai> selectAll();

}

[/code]

package com.didispace.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Service;

import com.didispace.bean.eshengtai;

/**
* @author e生态
* @version 1.0.0
* @date 16/3/17 下午6:44.
* @blog http://blog.csdn.net/ysl_228
*/
@Service
public class UserServiceImpl implements UserService {

@Autowired
private JdbcTemplate jdbcTemplate;

@Override
public void create(String name, Integer id) {
jdbcTemplate.update("insert into eshengtai(id, name) values(?, ?)", id , name);
}

@Override
public void deleteByName(String name) {
jdbcTemplate.update("delete from eshengtai where NAME = ?", name);
}

@Override
public Integer getAllUsers() {
return jdbcTemplate.queryForObject("select count(1) from eshengtai", Integer.class);
}

@Override
public void deleteAllUsers() {
jdbcTemplate.update("delete from eshengtai");
}

@Override
public List<eshengtai> selectAll() {
return jdbcTemplate.query("select id,name from eshengtai", new Object[]{}, new BeanPropertyRowMapper<eshengtai>(eshengtai.class));
}
}

[/code]

4、控制层代码结构

package com.didispace.web;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.didispace.bean.eshengtai;
import com.didispace.service.UserService;

/**
*
* @author e生态
* @version 1.0.0
* @blog http://blog.csdn.net/ysl_228
*
*/
@Controller
public class HelloController {

@Autowired
private UserService userService;

/**
* 添加数据
* @Title: add
* @param map
* @return
*
*/
@RequestMapping("/add")
public String add(eshengtai demo ,ModelMap map){
userService.create(demo.getName(), demo.getId());
map.addAttribute("list",userService.selectAll());
return "index";
}

@RequestMapping("/list")
public String add(ModelMap map){
map.addAttribute("list",userService.selectAll());
return "index";
}

@RequestMapping("/")
public String index(ModelMap map) {
map.addAttribute("host", "http://blog.csdn.net/ysl_228");
return "index";
}

}

[/code]
5、项目启动类

package com.didispace;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
*
* @author e生态
* @version 1.0.0
* @blog http://blog.csdn.net/ysl_228
*
*/
@SpringBootApplication
public class Application {

public static void main(String[] args) {

SpringApplication.run(Application.class, args);

}

}

[/code]
6、配置参数文件application.properties

#tomcat port , project Name
server.port=80
server.context-path=/eshengtai

#1.jdbc config
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url=jdbc:mysql://localhost:3306/boot
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

#2.extend config
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
spring.datasource.maxWait=60000
spring.datasource.timeBetweenEvictionRunsMillis=60000
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
spring.datasource.filters=stat,wall,log4j
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

[/code]
7、静态pom.xml文件

<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>spring-boot-properties</groupId>
<artifactId>spring-boot-properties</artifactId>
<version>0.0.1-SNAPSHOT</version>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.2.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>

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

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

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

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

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>

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

</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>

[/code]
8、操作增、删、改、查页面代码

<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8" />
<title></title>
</head>
<body>
<h1 th:text="${host}">数据列表</h1>
<form action="http://localhost/boot/add" method="post">
ID:<input type="text" name="id" />
NAME:<input type="text" name="name" />

<input type="submit"  value="提交" />
</form>
<hr/>
<div th:each="demo,iterStat : ${list}">
<span th:text="${demo.id}">id</span>
<span th:text="${demo.name}">name</span>
<br/>
</div>
</body>
</html>

[/code]
项目结构及演示图

以上就是所有springboot集成jdbc整体演示截图与代码，如果各位有好的想法与建议，还清大家在下面评论，本人非常愿意进行测试，会将测试结果反馈给各位。

 

转载于:https://my.oschina.net/u/1041709/blog/897811

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