SpringBoot+Mysql+Mybatis+Mybatis通用mapper+PageHelper整合

Posted 2022-11-05 zengnansheng

pom.xml

<?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.zns</groupId>
    <artifactId>zns-project</artifactId>
    <version>1.0.0</version>
    <packaging>war</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.RELEASE</version>
        <relativePath/>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <!-- 如果使用自带tomcat请注释下面，如果使用外置tomcat不要注释下面 -->
           <!-- <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>-->
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!-- mybatis-spring-boot-starter-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
        <!-- mybatis 通用mapper -->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>2.1.4</version>
            <exclusions>
                <exclusion>
                    <artifactId>persistence-api</artifactId>
                    <groupId>javax.persistence</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <!-- mybatis pagehelper分页 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.10</version>
        </dependency>
        <!-- mysql连接驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!-- druid 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.10</version>
        </dependency>

    </dependencies>

    <build>
        <finalName>$project.artifactId</finalName>
        <plugins>
            <!-- java编译插件 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

 application.yml

server:
  port: 9001
  servlet:
    context-path: /
spring:
    application:
        name: zns-project
    jmx:
        default-domain: zns-project #指定default-domain 可以解决多个应用部署在同一个tomcat启动报错问题
        enabled: false
    servlet:
        multipart:
            enabled: true
            max-file-size: 50MB #单个文件大小上限
            max-request-size: 100MB #文件总大小上限
    jackson:
        date-format: yyyy-MM-dd HH:mm:ss
        time-zone: GMT+8
    #mysql数据源和连接池配置
    datasource:
        name: con1
        url: jdbc:mysql://localhost:3306/zns
        username: root
        password: 123456
        #使用druid数据源
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.jdbc.Driver
        filters: stat
        maxActive: 20
        initialSize: 1
        maxWait: 60000
        minIdle: 1
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: select ‘x‘
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        poolPreparedStatements: true
        maxOpenPreparedStatements: 20
#mybatis
mybatis:
  # 映射文件的路径,多个配置可以使用英文逗号隔开
  mapper-locations: classpath:mybatis/mapper/*.xml
  # 类型别名包配置，只能指定具体的包，多个配置可以使用英文逗号隔开
  #type-aliases-package: com.zns.model
  # Mybatis SQL语句控制台打印
  configuration:
      log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
#通用mapper 多个接口时逗号隔开
mapper:
  mappers: tk.mybatis.mapper.common.BaseMapper   # 是个类，不是包名
  not-empty: true   # 设置以后，会去判断 insert 和 update 中字符串类型!=‘‘
  identity: MYSQL
  enum-as-simple-type: true  #枚举按简单类型处理
#pagehelper
pagehelper:
 # 配置使用哪种数据库语言，不配置的话pageHelper也会自动检测,这里使用的mysql。
  helper-dialect: mysql
  # 分页合理化参数，默认值为false。当该参数设置为 true 时，pageNum<=0 时会查询第一页， pageNum>pages（超过总数时），会查询最后一页。默认false 时，直接根据参数进行查询
  reasonable: true
  # 支持通过 Mapper 接口参数来传递分页参数，默认值false，分页插件会从查询方法的参数值中，自动根据上面 params 配置的字段中取值，查找到合适的值时就会自动分页
  supportMethodsArguments: true
 # 为了支持startPage(Object params)方法，增加了该参数来配置参数映射，用于从对象中根据属性名取值， 可以配置 pageNum,pageSize,count,pageSizeZero,reasonable，不配置映射的用默认值，默认值为pageNum=pageNum;pageSize=pageSize;count=countSql;reasonable=reasonable;pageSizeZero=pageSizeZero。
  params: count=countSql

 

启动类加上

//mapper扫描包路径，如果集成了通用mapper MapperScan应该引用tk.mybatis.spring.annotation.MapperScan,否则org.mybatis.spring.annotation.MapperScan
@MapperScan("com.zns.project.mapper")

增加一个配置类WebConfig

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class WebConfig implements WebMvcConfigurer 
    @Override
    public void addInterceptors(InterceptorRegistry registry) 
    

DruidDataSourceConfig

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

@Configuration
public class DruidDataSourceConfig 
    /**
     * 配置DruidDataSource
     *
     * @return
     */
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource druidDataSource() 
        DruidDataSource druidDataSource = new DruidDataSource();
        return druidDataSource;
    

    /**
     * 配置transactionManager
     *
     * @return
     */
    @Bean
    public PlatformTransactionManager transactionManager() throws SQLException 
        return new DataSourceTransactionManager(druidDataSource());
    

    /**
     * 注册DruidServlet
     *
     * @return
     */
    @Bean
    public ServletRegistrationBean druidServletRegistrationBean() 
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean();
        servletRegistrationBean.setServlet(new StatViewServlet());
        servletRegistrationBean.addUrlMappings("/druid/*");
        //登录查看信息的账号密码.
        servletRegistrationBean.addInitParameter("loginUsername", "web");
        servletRegistrationBean.addInitParameter("loginPassword", "123456");
        return servletRegistrationBean;
    

    /**
     * 注册DruidFilter拦截
     *
     * @return
     */
    @Bean
    public FilterRegistrationBean duridFilterRegistrationBean() 
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());
        Map<String, String> initParams = new HashMap<String, String>();
        // 设置忽略请求
        initParams.put("exclusions", "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*");
        filterRegistrationBean.setInitParameters(initParams);
        filterRegistrationBean.addUrlPatterns("/*");
        return filterRegistrationBean;
    

 

Mapper xml

<select id="pageTest" resultType="com.zns.model.Test">
        select id,name from test
</select>

 

 

Mapper

public Page<Test> pageTest();

 

 

Service

public Page<Test> pageTest()
    PageHelper.startPage(1, 10);
    return testMapper.pageTest();

 

 

Controller

public void testPager() 
        Page<Test> pageInfo= testService.pageTest();
        List<Test> list=pageInfo.getResult();
        long totalCount=pageInfo.getTotal();
        for (Test test : list) 
            System.out.println(test.getId()+"--"+test.getName());
            
        System.out.println(totalCount);