数据持久层框架MyBatis的应用
Posted 朵渔
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1.引入依赖
1 <parent> 2 <groupId>org.springframework.boot</groupId> 3 <artifactId>spring-boot-starter-parent</artifactId> 4 <version>1.5.3.RELEASE</version> 5 </parent> 6 <dependency> 7 <groupId>org.springframework.boot</groupId> 8 <artifactId>spring-boot-starter-web</artifactId> 9 </dependency> 10 11 <dependency> 12 <groupId>io.springfox</groupId> 13 <artifactId>springfox-swagger-ui</artifactId> 14 <version>2.6.1</version> 15 </dependency> 16 17 <dependency> 18 <groupId>io.springfox</groupId> 19 <artifactId>springfox-swagger2</artifactId> 20 <version>2.6.1</version> 21 </dependency> 22 <dependency> 23 <groupId>org.projectlombok</groupId> 24 <artifactId>lombok</artifactId> 25 <version>1.16.14</version> 26 </dependency> 27 <dependency> 28 <groupId>com.alibaba</groupId> 29 <artifactId>fastjson</artifactId> 30 <version>1.2.38</version> 31 </dependency> 32 <dependency> 33 <groupId>mysql</groupId> 34 <artifactId>mysql-connector-java</artifactId> 35 </dependency> 36 <dependency> 37 <groupId>org.mybatis.spring.boot</groupId> 38 <artifactId>mybatis-spring-boot-starter</artifactId> 39 <version>1.3.0</version> 40 </dependency>
2.编写application.yml配置文件，名称必须为application
1 server: 2 port: 8888 #指定启动端口号 3 # 指定默认启动环境 4 spring: 5 application: 6 name: test_service 7 profiles: 8 active: test # 默认环境 9 datasource: 10 driver-class-name: com.mysql.jdbc.Driver 11 url: jdbc:mysql://127.0.0.1:3306/test 12 username: admin 13 password: admin123 14 15 mybatis: 16 type-aliases-package: com.test.pojo #这里是实体类的位置，多个package用逗号或分号分隔 17 mapper-locations: 18 - mapper/*
3.mybatis-config.xml配置
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE configuration 3 PUBLIC "-//mybatis.org//DTD Config 3.0//EN" 4 "http://mybatis.org/dtd/mybatis-3-com.course.config.dtd"> 5 6 <configuration> 7 <typeAliases> 8 <package name="com.test.pojo"/> 9 </typeAliases> 10 <mappers> 11 <mapper resource="mapper/PeopleMapper.xml"/> 12 </mappers> 13 </configuration>
4.logback.xml配置
1 <?xml version="1.0" encoding="UTF-8"?> 2 <configuration 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:noNamespaceSchemaLocation="http://www.padual.com/java/logback.xsd" 5 debug="false" scan="true" scanPeriod="30 second"> 6 7 <property name="PROJECT" value="iorder" /> 8 <property name="ROOT" value="logs/${PROJECT}/" /> 9 <property name="FILESIZE" value="50MB" /> 10 <property name="MAXHISTORY" value="100" /> 11 <timestamp key="DATETIME" datePattern="yyyy-MM-dd HH:mm:ss" /> 12 <!-- 控制台打印 --> 13 <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> 14 <encoder charset="utf-8"> 15 <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n 16 </pattern> 17 </encoder> 18 </appender> 19 <!-- ERROR 输入到文件，按日期和文件大小 --> 20 <appender name="ERROR" class="ch.qos.logback.core.rolling.RollingFileAppender"> 21 <encoder charset="utf-8"> 22 <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n 23 </pattern> 24 </encoder> 25 <filter class="ch.qos.logback.classic.filter.LevelFilter"> 26 <level>ERROR</level> 27 <onMatch>ACCEPT</onMatch> 28 <onMismatch>DENY</onMismatch> 29 </filter> 30 <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> 31 <fileNamePattern>${ROOT}%d/error.%i.log</fileNamePattern> 32 <maxHistory>${MAXHISTORY}</maxHistory> 33 <timeBasedFileNamingAndTriggeringPolicy 34 class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> 35 <maxFileSize>${FILESIZE}</maxFileSize> 36 </timeBasedFileNamingAndTriggeringPolicy> 37 </rollingPolicy> 38 </appender> 39 40 <!-- WARN 输入到文件，按日期和文件大小 --> 41 <appender name="WARN" class="ch.qos.logback.core.rolling.RollingFileAppender"> 42 <encoder charset="utf-8"> 43 <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n 44 </pattern> 45 </encoder> 46 <filter class="ch.qos.logback.classic.filter.LevelFilter"> 47 <level>WARN</level> 48 <onMatch>ACCEPT</onMatch> 49 <onMismatch>DENY</onMismatch> 50 </filter> 51 <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> 52 <fileNamePattern>${ROOT}%d/warn.%i.log</fileNamePattern> 53 <maxHistory>${MAXHISTORY}</maxHistory> 54 <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> 55 <maxFileSize>${FILESIZE}</maxFileSize> 56 </timeBasedFileNamingAndTriggeringPolicy> 57 </rollingPolicy> 58 </appender> 59 60 <!-- INFO 输入到文件，按日期和文件大小 --> 61 <appender name="INFO" class="ch.qos.logback.core.rolling.RollingFileAppender"> 62 <encoder charset="utf-8"> 63 <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n 64 </pattern> 65 </encoder> 66 <filter class="ch.qos.logback.classic.filter.LevelFilter"> 67 <level>INFO</level> 68 <onMatch>ACCEPT</onMatch> 69 <onMismatch>DENY</onMismatch> 70 </filter> 71 <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> 72 <fileNamePattern>${ROOT}%d/info.%i.log</fileNamePattern> 73 <maxHistory>${MAXHISTORY}</maxHistory> 74 <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> 75 <maxFileSize>${FILESIZE}</maxFileSize> 76 </timeBasedFileNamingAndTriggeringPolicy> 77 </rollingPolicy> 78 </appender> 79 <!-- DEBUG 输入到文件，按日期和文件大小 --> 80 <appender name="DEBUG" class="ch.qos.logback.core.rolling.RollingFileAppender"> 81 <encoder charset="utf-8"> 82 <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n 83 </pattern> 84 </encoder> 85 <filter class="ch.qos.logback.classic.filter.LevelFilter"> 86 <level>DEBUG</level> 87 <onMatch>ACCEPT</onMatch> 88 <onMismatch>DENY</onMismatch> 89 </filter> 90 <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> 91 <fileNamePattern>${ROOT}%d/debug.%i.log</fileNamePattern> 92 <maxHistory>${MAXHISTORY}</maxHistory> 93 <timeBasedFileNamingAndTriggeringPolicy 94 class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> 95 <maxFileSize>${FILESIZE}</maxFileSize> 96 </timeBasedFileNamingAndTriggeringPolicy> 97 </rollingPolicy> 98 </appender> 99 <!-- TRACE 输入到文件，按日期和文件大小 --> 100 <appender name="TRACE" class="ch.qos.logback.core.rolling.RollingFileAppender"> 101 <encoder charset="utf-8"> 102 <pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n 103 </pattern> 104 </encoder> 105 <filter class="ch.qos.logback.classic.filter.LevelFilter"> 106 <level>TRACE</level> 107 <onMatch>ACCEPT</onMatch> 108 <onMismatch>DENY</onMismatch> 109 </filter> 110 <rollingPolicy 111 class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> 112 <fileNamePattern>${ROOT}%d/trace.%i.log</fileNamePattern> 113 <maxHistory>${MAXHISTORY}</maxHistory> 114 <timeBasedFileNamingAndTriggeringPolicy 115 class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> 116 <maxFileSize>${FILESIZE}</maxFileSize> 117 </timeBasedFileNamingAndTriggeringPolicy> 118 </rollingPolicy> 119 </appender> 120 121 <!-- SQL相关日志输出--> 122 <logger name="org.apache.ibatis" level="INFO" additivity="false" /> 123 <logger name="org.mybatis.spring" level="INFO" additivity="false" /> 124 <logger name="com.github.miemiedev.mybatis.paginator" level="INFO" additivity="false" /> 125 126 <!-- Logger 根目录 --> 127 <root level="DEBUG"> 128 <appender-ref ref="STDOUT" /> 129 <appender-ref ref="DEBUG" /> 130 <appender-ref ref="ERROR" /> 131 <appender-ref ref="WARN" /> 132 <appender-ref ref="INFO" /> 133 <appender-ref ref="TRACE" /> 134 </root> 135 </configuration>
5.src下新建mapper包，包下新建PeopleMapper.xml
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper 3 PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" 4 "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 5 6 <mapper namespace="com.test"> 7 <select id="getPeopleCount" resultType="Integer"> 8 select count(*) from people; 9 </select> 10 </mapper>
6.新建People实体类
1 package com.test.pojo; 2 3 import lombok.Data; 4 5 @Data 6 public class People { 7 private int id; 8 private String name; 9 private int age; 10 }
7.新建com.test.controller包，包下新建Demo类，编写查询方法
1 @Log4j 2 @RestController 3 @Api(value = "v1",description = "这是我的第一个版本的demo") 4 @RequestMapping("v1") 5 public class Demo { 6 //首先获取一个执行sql语句的对象 7 8 @Autowired 9 private SqlSessionTemplate template; 10 11 @GetMapping(value = "/getPeopleCount") 12 @ApiOperation(value = "可以获取到用户数") 13 public int getUserCount(){ 14 return template.selectOne("getPeopleCount"); 15 } 16 }
8.编写springboot启动类，运行
1 package com.test; 2 3 4 import org.springframework.boot.SpringApplication; 5 import org.springframework.boot.autoconfigure.SpringBootApplication; 6 import org.springframework.context.ConfigurableApplicationContext; 7 import org.springframework.scheduling.annotation.EnableScheduling; 8 9 import javax.annotation.PreDestroy; 10 11 @EnableScheduling //开启计划任务的支持 12 @SpringBootApplication 13 public class Application { 14 15 private static ConfigurableApplicationContext context; 16 17 public static void main(String[] args) { 18 Application.context = SpringApplication.run(Application.class,args); 19 } 20 //释放资源 21 @PreDestroy 22 public void close(){ 23 Application.context.close(); 24 } 25 26 }
9.新增接口
9.1PeopleMapper.xml中配置
1 <insert id="insPeo"> 2 insert into people values(#{id},#{name},#{age}); 3 </insert>
9.2Demo中配置
1 @PostMapping("/addPeople") 2 @ApiOperation(value = "增加用户") 3 public int addPeople(@RequestBody People peo) { 4 return template.insert("insPeo",peo); 5 }
10.修改接口
10.1PeopleMapper.xml中配置
1 <update id="updPeo"> 2 update people set name=#{name},age=#{age} where id=#{id}; 3 </update>
10.2Demo中配置
1 @PostMapping("/updPeople") 2 @ApiOperation(value = "修改用户信息") 3 public int updPeople(@RequestBody People peo) { 4 return template.update("updPeo",peo); 5 }
11.删除接口
11.1PeopleMapper.xml中配置
1 <delete id="delPeo"> 2 delete from people where id =#{id}; 3 </delete>
11.2Demo中配置
1 @PostMapping("/delPeople") 2 @ApiOperation(value = "删除用户信息") 3 public int delPeople(@RequestBody People peo) { 4 return template.delete("delPeo",peo); 5 }
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