springboot免去了一大堆的xml配置泌绣,達到了開箱即用垦垂,springboot中的springdatajpa是完整的ORM框架沪哺,對于簡單的字段可以直接通過方法中的字段名即可,但是對于有些情況下,復雜的查詢笤喳,查詢的調優(yōu)還是用mybatis這種半自動的框架比較合適为居,mybatis也可以注解開發(fā),但是為了更加流程的開發(fā)體驗還是用xml噢誒值的方式更加讓人喜歡
整合步驟
1. 引入依賴
可以使用IDEA方便的選擇主要的start
<?xml version="1.0" encoding="UTF-8"?>
<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.marry.dezhou</groupId>
<artifactId>fg</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>fg</name>
<description></description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.7.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.7</java.version>
<commons-lang3.version>3.4</commons-lang3.version>
</properties>
<dependencies>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--引入druid的maven-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.29</version>
</dependency>
<!-- 阿里巴巴fastjson杀狡,解析json視圖 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.15</version>
</dependency>
<!--oracle數(shù)據(jù)庫-->
<dependency>
<groupId>ojdbc</groupId>
<artifactId>ojdbc14</artifactId>
<version>10.2.0.4.0</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
</dependencies>
<build>
<finalName>fgshare</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
推薦使用阿里的Druid數(shù)據(jù)庫連接池蒙畴,監(jiān)控功能可以方便得查看每個SQL的執(zhí)行時間等信息,對于調優(yōu)很方便
2.配置數(shù)據(jù)庫連接
這里使用的.yml格式的配置文件
spring:
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: oracle.jdbc.driver.OracleDriver
url: jdbc:oracle:thin:@127.0.0.1:1521:orcl
username: estate_dz
password: estate
#最大活躍數(shù)
maxActive: 50
#初始化數(shù)量
initialSize: 1
#最大連接等待超時時間
maxWait: 60000
#打開PSCache捣卤,并且指定每個連接PSCache的大小
poolPreparedStatements: true
maxPoolPreparedStatementPerConnectionSize: 20
#通過connectionProperties屬性來打開mergeSql功能忍抽;慢SQL記錄
#connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
minIdle: 1
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: select 1 from dual
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
#配置監(jiān)控統(tǒng)計攔截的filters,去掉后監(jiān)控界面sql將無法統(tǒng)計,'wall'用于防火墻
filters: stat, log4j
為了可以正確顯示監(jiān)控等信息董朝,還需要具體配置一下,springboot是java配置的形式
@Configuration
public class DruidConfiguration {
@Bean(initMethod = "init",destroyMethod = "close")
@ConfigurationProperties(prefix = "spring.datasource")
public DruidDataSource dataSource(){
return new DruidDataSource();
}
@Bean
public ServletRegistrationBean statViewServlet(){
ServletRegistrationBean servletRegistrationBean=new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
servletRegistrationBean.addInitParameter("loginUsername","malin");
servletRegistrationBean.addInitParameter("loginPassword","123456");
servletRegistrationBean.addInitParameter("resetEnable","false");
return servletRegistrationBean;
}
@Bean
public FilterRegistrationBean statFilter(){
FilterRegistrationBean filterRegistrationBean=new FilterRegistrationBean(new WebStatFilter());
filterRegistrationBean.addUrlPatterns("/*");
filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
return filterRegistrationBean;
}
}
@Bean(initMethod = "init",destroyMethod = "close")
initMethod參數(shù)不配置的話監(jiān)控頁面的數(shù)據(jù)源界面可能無法正確顯示
3.配置mybatis的配置文件及.xml等
還是application.yml
文件添加代碼
mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: com.marry.dezhou.fg.domain
config-location: classpath:mybatis-config.xml
mapper-locations 指定.xml文件所在的位置
type-aliases-package 指定別名的包 寫type時直接寫類名即可
type-aliases-package 指定mybatis其他配置文件的位置 比如可以在控制臺打印sql
4.編寫Mapper接口
import com.marry.dezhou.fg.domain.Houseroom;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
/**
* Created by ml on 2017-10-26.
*/
@Mapper
public interface StudentMapper {
/**
* 通過名字獲去學生
* @param name
* @return
*/
Student selectStudentByName(@Param("name") String name);
}
}
直接在相應的接口上寫上@Mapper注解即可
方法名即是接下來寫在.xml文件中的查詢id
@Param()注解將字段映射到.xml文件中的#{}參數(shù)中 一個參數(shù)的話可以不寫
5.編寫xml文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.marry.dezhou.fg.mapper.StudentMapper">
<select id="selectStudentByName" resultType="Student">
SELECT *
FROM STUDENT
WHERE NAME= #{name}
</select>
</mapper>
namespace 寫上需要連接到的Mapper接口的全類名
6.完工 在需要的地方將接口注入就行了
附上mybatis-config.xml的配置文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 設置運行參數(shù) -->
<settings>
<!-- 全局映射器啟用緩存 -->
<setting name="cacheEnabled" value="true" />
<!-- 查詢時,關閉關聯(lián)對象及時加載以提高性能 -->
<setting name="lazyLoadingEnabled" value="false" />
<!-- 設置關聯(lián)對象加載的形態(tài),此處為按需加載字段(加載字段由SQL指定),不會加載關聯(lián)表的所有字段,以提高性能 -->
<setting name="aggressiveLazyLoading" value="false" />
<!-- 對于位置的SQL查詢,允許返回不同的結果集以達到通用的效果 -->
<setting name="multipleResultSetsEnabled" value="true" />
<!-- 允許使用列標簽代替列明 -->
<setting name="useColumnLabel" value="true" />
<!-- 允許使用自定義的主鍵值(比如由程序生成的UUID 32位編碼作為鍵值), 數(shù)據(jù)表的pk生成策略將被覆蓋 -->
<setting name="useGeneratedKeys" value="true" />
<!-- 給予被嵌套的resultMap以字段-屬性的映射支持 -->
<setting name="autoMappingBehavior" value="PARTIAL" />
<!-- 對于批量更新操作緩存SQL以提高性能 -->
<setting name="defaultExecutorType" value="REUSE" />
<!-- 數(shù)據(jù)庫超過25000秒仍未響應則超時 -->
<setting name="defaultStatementTimeout" value="25000" />
<!-- 打印查詢語句 -->
<!--<setting name="logImpl" value="STDOUT_LOGGING" />-->
<setting name="logImpl" value="SLF4J"/>
</settings>
</configuration>