IDEA 构建简单spring boot的web项目（springmvc+mybatis[mysql]+freemaker）

记录一下IDEA 构建简单spring boot的web项目（springmvc+mybatis[mysql]+freemaker）的过程

1、项目整体目录 

2、pom.xml 添加依赖

   4.0.0
   com.example
   my-ssm-web
   0.0.1-SNAPSHOT
   jar

   my-ssm-web
   Demo project for Spring Boot
   
      org.springframework.boot
      spring-boot-starter-parent
      2.0.6.RELEASE
      
   
   
      UTF-8
      UTF-8
      1.8
   
   
      
         org.springframework.boot
         spring-boot-starter-web
      
      
      
         org.mybatis.spring.boot
         mybatis-spring-boot-starter
         1.3.2
      
      
      
         mysql
         mysql-connector-java
         runtime
      
      
      
         com.alibaba
         druid
         1.0.18
      
      
      
         org.springframework.boot
         spring-boot-starter-freemarker
      
   
   
      
         
            org.springframework.boot
            spring-boot-maven-plugin
         
      
   

3、application.properties配置

#数据源配置
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

# Mybatis 映射配置
mybatis.typeAliasesPackage=com.example.demo.Domain
mybatis.mapperLocations=classpath:mapper/*.xml

#freemarker配置
spring.freemarker.allow-request-override=false
spring.freemarker.cache=true
spring.freemarker.check-template-location=true
spring.freemarker.charset=UTF-8
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=false
spring.freemarker.expose-session-attributes=false
spring.freemarker.expose-spring-macro-helpers=false
spring.freemarker.prefix=/
spring.freemarker.suffix=.html
spring.freemarker.template-loader-path=classpath:/templates/

4、实体类

package com.example.demo.Domain;

import org.springframework.stereotype.Component;

@Component
public class Student {
    private int id;
    private String name;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

5、Dao

package com.example.demo.Dao;

import com.example.demo.Domain.Student;

public interface StudentMapper {
    int insert(Student record);
    Student selectById(Integer id);
}

6、mybatis映射文件

    
        
        
    
    
        insert into user (username,id)
        values (#{username,jdbcType=VARCHAR}, #{id,jdbcType=INTEGER})
    
    
        select * from student where id = #{id,jdbcType=INTEGER}
    

7、service

package com.example.demo.Service;

import com.example.demo.Domain.Student;

public interface StudentService {
    int insert(Student record);
    Student selectById(Integer id);
}

8、serviceImpl

package com.example.demo.Service.Impl;

import com.example.demo.Dao.StudentMapper;
import com.example.demo.Domain.Student;
import com.example.demo.Service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class StudentServiceImpl implements StudentService {
    @Autowired
    private StudentMapper studentMapper;
    @Override
    public int insert(Student record) {
        return studentMapper.insert(record);
    }
    @Override
    public Student selectById(Integer id) {
        return studentMapper.selectById(id);
    }
}

9、启动类，添加扫描dao包

package com.example.demo;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.example.demo.Dao")
//此次若不定义MapperScan,也可以在dao类添加@Component和@Mapper两个注解
public class MySsmWebApplication {

   public static void main(String[] args) {
      SpringApplication.run(MySsmWebApplication.class, args);
   }
}

10、index页面简单的展示，因为使用了freemaker，所以能用freemaker表达式获取后端ModelAndView传递的参数

    
    


hi ${name}