使用篇-springboot+mybatis+freemarker使用实例分享

• 导入项目依赖

<dependencies>
        <dependency>
            <groupId>tk.mybatisgroupId>
            <artifactId>mapper-spring-boot-starterartifactId>
            <version>2.1.5version>
        dependency>
        <dependency>
            <groupId>ch.qos.logbackgroupId>
            <artifactId>logback-classicartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-freemarkerartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-devtoolsartifactId>
            <scope>runtimescope>
            <optional>trueoptional>
        dependency>
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <scope>runtimescope>
        dependency>
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <optional>trueoptional>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintagegroupId>
                    <artifactId>junit-vintage-engineartifactId>
                exclusion>
            exclusions>
        dependency>
    dependencies>

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

• 加logback日志

<configuration>
    
    <statusListener class="ch.qos.logback.core.status.NopStatusListener" />
    
    <property name="CONSOLE_LOG_PATTERN"
              value="时间:%date{yyyy-MM-dd HH:mm:ss} 级别: %highlight(%-5level) 进程: %boldYellow(%thread) 类: %boldGreen(%logger) 信息: %msg%n"/>
    
    <property name="ERRINFOFILE_LOG_PATTERN" value="时间:%date{yyyy-MM-dd HH:mm:ss} 级别: %-5level 进程: %thread 类: %logger 信息: %msg%n"/>

    <appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>
                ${CONSOLE_LOG_PATTERN}
            pattern>
        layout>
    appender>

    <root level="info">
        <appender-ref ref="consoleLog" />
    root>
configuration>

• 代码分层

  • bean

    • 数据库表（t_user）

    

    • JavaBean

      @Data
      @Table(name = "t_user")
      public class User implements Serializable {
                 
          @Column(name = "u_id")
          private Integer id;
          @Column(name = "u_name")
          private String name;
          @Column(name = "u_password")
          private String password;
      }
      

  • mapper

    public interface UserMapper extends Mapper<User> {
             
    }
    

  • service

    public interface UserService {
             
        List<User> listAll();
    }
    
    //实现类
    @Service
    public class UserServiceImpl implements UserService {
             
    
        @Autowired
        private UserMapper userMapper;
    
        @Override
        public List<User> listAll() {
             
            return userMapper.selectAll();
        }
    }
    

  • controller

    @Controller
    public class UserController {
             
        @Autowired
        private UserService userService;
        
        @RequestMapping("/list")
        public String listAll(Model model){
             
            List<User> userList = userService.listAll();
            model.addAttribute("list",userList);
            return "list";
        }
    }
    

• 配置文件

  • application.yml

    spring:
      datasource:
        type: com.zaxxer.hikari.HikariDataSource
        url: jdbc:mysql:///db4?serverTimezone=GMT%2B8
        username: root
        password: root
      mvc:
        view:
          prefix: /
          suffix: .ftl
      freemarker:
        suffix: .ftl
        content-type: text/html
        charset: UTF-8
    
    mybatis:
      mapper-locations: classpath:mappers/*.xml
      type-aliases-package: com.ujiuye.bean
    

• 模板引擎页面

  list.ftl

  DOCTYPE html>
  <html lang="zh-CN">
  <head>
      <meta charset="UTF-8">
      <title>Titletitle>
  head>
  <body>
      <h2>用户列表h2>
      <#list list as user>
          <ul>
              <li>${user.id}li>
              <li>${user.name}li>
              <li>${user.password}li>
          ul>
      #list>
  body>
  html>
  

• 测试