springboot整合
文章目录
-
- 1.springboot配置数据库连接池druid
- 2.springboot整合mybatis
- 3.springboot整合pagehelper
1.springboot配置数据库连接池druid
druid学习地址:https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter
创建项目时勾选pom依赖
配置application.yml
spring:
datasource:
#1.JDBC
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/mybatis_ssm?useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
username: mybatis_ssm
password: xiaoli
druid:
#2.连接池配置
#初始化连接池的连接数量 大小，最小，最大
initial-size: 5
min-idle: 5
max-active: 20
#配置获取连接等待超时的时间
max-wait: 60000
#配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
time-between-eviction-runs-millis: 60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
min-evictable-idle-time-millis: 30000
validation-query: SELECT 1 FROM DUAL
test-while-idle: true
test-on-borrow: true
test-on-return: false
# 是否缓存preparedStatement，也就是PSCache 官方建议MySQL下建议关闭 个人建议如果想用SQL防火墙 建议打开
pool-prepared-statements: true
max-pool-prepared-statement-per-connection-size: 20
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
filter:
stat:
merge-sql: true
slow-sql-millis: 5000
#3.基础监控配置
web-stat-filter:
enabled: true
url-pattern: /*
#设置不统计哪些URL
exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"
session-stat-enable: true
session-stat-max-count: 100
stat-view-servlet:
enabled: true
url-pattern: /druid/*
reset-enable: true
#设置监控页面的登录名和密码
login-username: admin
login-password: admin
allow: 127.0.0.1
#deny: 192.168.1.100
启动SpringBoot项目访问druid， http://localhost:tomcat端口号/项目名称/druid/
HelloController.java
package com.lin.springboot02.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @authorlinfan
* @site www.linfanmage.com
* @company xxx公司
* @create 2019-11-09 11:02
*/
@RestController
@RequestMapping("/demo")
public class HelloController {
@RequestMapping("/say1")
public String say1(){
return "我会说。。";
}
@RequestMapping("/say2")
public String say2(){
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "你会说。。";
}
@RequestMapping("/say3")
public String say3() {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "他会说。。";
}
}
检测结果：
2.springboot整合mybatis
相关pom依赖
<!--更改springboot中的mysql版本，逆向生成不兼容高版本-->
<mysql.version>5.1.44</mysql.version>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${
mysql.version}</version>
<scope>runtime</scope>
</dependency>
<resources>
<!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml
src/main/resources
*.properties
*.xml
*.yml
org.mybatis.generator
mybatis-generator-maven-plugin
1.3.2
mysql
mysql-connector-java
${mysql.version}
true
逆向生成配置文件generatorConfig.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
<!-- 引入配置文件 -->
<properties resource="jdbc.properties"/>
<!--指定数据库jdbc驱动jar包的位置-->
<classPathEntry location="D:\app\maven\maven-repomts\mysql\mysql-connector-java\5.1.44\mysql-connector-java-5.1.44.jar"/>
<!-- 一个数据库一个context -->
<context id="infoGuardian">
<!-- 注释 -->
<commentGenerator>
<property name="suppressAllComments" value="true"/><!-- 是否取消注释 -->
<property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 -->
</commentGenerator>
<!-- jdbc连接 -->
<jdbcConnection driverClass="${jdbc.driver}"
connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>
<!-- 类型转换 -->
<javaTypeResolver>
<!-- 是否使用bigDecimal， false可自动转化以下类型（Long, Integer, Short, etc.） -->
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- 01 指定javaBean生成的位置 -->
<!-- targetPackage：指定生成的model生成所在的包名 -->
<!-- targetProject：指定在该项目下所在的路径 -->
<javaModelGenerator targetPackage="com.lin.springboot02.entity"
targetProject="src/main/java">
<!-- 是否允许子包，即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
<!-- 是否对model添加构造函数 -->
<property name="constructorBased" value="true"/>
<!-- 是否针对string类型的字段在set的时候进行trim调用 -->
<property name="trimStrings" value="false"/>
<!-- 建立的Model对象是否 不可改变 即生成的Model对象不会有 setter方法，只有构造方法 -->
<property name="immutable" value="false"/>
</javaModelGenerator>
<!-- 02 指定sql映射文件生成的位置 -->
<sqlMapGenerator targetPackage="com.lin.springboot02.mapper"
targetProject="src/main/java">
<!-- 是否允许子包，即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>
<!-- 03 生成XxxMapper接口 -->
<!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 -->
<!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 -->
<!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 -->
<javaClientGenerator targetPackage="com.lin.springboot02.mapper"
targetProject="src/main/java" type="XMLMAPPER">
<!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model， true:com.oop.eksp.user.model.[schemaName] -->
<property name="enableSubPackages" value="false"/>
</javaClientGenerator>
<!-- 配置表信息 -->
<!-- schema即为数据库名 -->
<!-- tableName为对应的数据库表 -->
<!-- domainObjectName是要生成的实体类 -->
<!-- enable*ByExample是否生成 example类 -->
<table schema="" tableName="t_mvc_book" domainObjectName="Book"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableUpdateByExample="false">
<property name="useActualColumnNames" value="true" />
</table>
</context>
</generatorConfiguration>
逆向生成集成到maven中的命令
mybatis-generator:generate -e
Springboot02Application.java
使用@Repository注解，在启动类中添加@MapperScan(“xxxx”)注解，用于扫描Mapper类的包。扫描多个包：@MapperScan({”com.lin.springboot02.dao”,”com.lin.springboot02.entity”})
//启用事物管理器
@EnableTransactionManagement
package com.lin.springboot02;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@MapperScan("com.lin.springboot02.mapper")
@SpringBootApplication
public class Springboot02Application {
public static void main(String[] args) {
SpringApplication.run(Springboot02Application.class, args);
}
}
测试代码
package com.lin.springboot02;
import com.lin.springboot02.entity.Book;
import com.lin.springboot02.service.BookService;
import com.lin.springboot02.util.PageBean;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@SpringBootTest
class Springboot02ApplicationTests {
@Autowired
private BookService bookService;
@Test
public void deleteByPrimaryKey() {
int book = bookService.deleteByPrimaryKey(13);
if (book>0){
System.out.println("删除成功！");
}
}
@Test
public void selectByPrimaryKey() {
Book book= bookService.selectByPrimaryKey(13);
System.out.println(book);
}
3.springboot整合pagehelper
相关pom依赖
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.2.3</version>
</dependency>
配置application.yml文件
#pagehelper分页插件配置
pagehelper:
helperDialect: mysql
reasonable: true
supportMethodsArguments: true
params: count=countSql
#显示日志
logging:
level:
com.javaxl.springboot02.mapper: debug
相关代码
BookMapper.java
List<Book> queryBooksPager(Book book);
BookMapper.xml
<select id="queryBooksPager" resultType="com.lin.springboot02.entity.Book" parameterType="com.lin.springboot02.entity.Book">
select
<include refid="Base_Column_List" />
from t_mvc_book
<where>
<if test="bname != null and bname !=''">
bname like #{
bname}
</if>
</where>
</select>
BookService.java
package com.lin.springboot02.service;
import com.lin.springboot02.entity.Book;
import com.lin.springboot02.util.PageBean;
import java.util.List;
/**
* @authorlinfan
* @site www.linfanmage.com
* @company xxx公司
* @create 2019-11-09 14:34
*/
public interface BookService {
int deleteByPrimaryKey(Integer bid);
Book selectByPrimaryKey(Integer bid);
List<Book> queryBooksPager(Book book, PageBean pageBean);
}
BookServiceImpl.java
package com.lin.springboot02.service.impl;
import com.lin.springboot02.entity.Book;
import com.lin.springboot02.mapper.BookMapper;
import com.lin.springboot02.service.BookService;
import com.lin.springboot02.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @authorlinfan
* @site www.linfanmage.com
* @company xxx公司
* @create 2019-11-09 14:36
*/
@Service
public class BookServiceImpl implements BookService {
@Autowired
private BookMapper bookMapper;
@Override
public int deleteByPrimaryKey(Integer bid) {
return bookMapper.deleteByPrimaryKey(bid);
}
@Override
public Book selectByPrimaryKey(Integer bid) {
return bookMapper.selectByPrimaryKey(bid);
}
@Override
public List<Book> queryBooksPager(Book book, PageBean pageBean) {
return bookMapper.queryBooksPager(book);
}
}
PagerAspect.java
package com.lin.springboot02.aspect;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.lin.springboot02.util.PageBean;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
@Aspect
public class PagerAspect {
@Around("execution(* *..*Service.*Pager(..))")
public Object invoke(ProceedingJoinPoint args) throws Throwable{
Object[] params = args.getArgs();
PageBean pageBean = null;
for (Object param : params) {
if(param instanceof PageBean){
pageBean = (PageBean) param;
break;
}
}
if (pageBean !=null && pageBean.isPagination())
PageHelper.startPage(pageBean.getPage(),pageBean.getRows());
Object proceed = args.proceed(params);
if (pageBean !=null && pageBean.isPagination()){
PageInfo pageInfo = new PageInfo((List) proceed);
pageBean.setTotal(pageInfo.getTotal()+"");
}
return proceed;
}
}
测试代码：
@Test
public void queryBooksPager() {
Book book =new Book();
book.getBname("圣墟");
PageBean pageBean =new PageBean();
pageBean.setPage(2);
List<Book> list =this.bookService.queryBooksPager(book,pageBean);
for(Book ls :list){
System.out.println(ls);
}
System.out.println(pageBean);
}
测试结果：
