通过springboot+mybatis+mysql+freemarker创建一个java web项目

项目地址详见：
https://github.com/gholly/springboot-java-web-freemarker.git
1.File->New->Project：点击maven构建maven项目，然后点击next，



进而填写项目名称：



点击finish即可。

2.springboot初探,搭建一个基础的java web项目

pom.xml文件

<?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.test</groupId>
<artifactId>blue</artifactId>
<version>1.0-SNAPSHOT</version>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.5.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>

</project>

创建applicationwen



Application.java文件：

package com.test.blue;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
* Created by guanguan on 17/1/17.
*/
@SpringBootApplication
public class Application {

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

controller.java文件

package com.test.blue;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
* Created by guanguan on 17/1/17.
*/
@Controller
public class controller {

@RequestMapping("/")
@ResponseBody
public String index(){
String index="jjj";
return index;
}
}

然后运行application.java文件，运行成功后，在浏览器上输入localhost:8080/



3.用springboot结合mybatis实现一个java web项目



pom.xml文件：

<?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.test</groupId>
<artifactId>blue</artifactId>
<version>1.0-SNAPSHOT</version>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.5.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.8</version>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>

<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>

<!--数据源-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.21</version>
</dependency>

<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.43</version>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>utf-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-release-plugin</artifactId>
<version>2.0</version>
</plugin>
</plugins>
</build>

</project>

Application.java

package com.test.blue;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
* Created by guanguan on 17/1/17.
*/
@SpringBootApplication
@ComponentScan("com.test.blue")
public class Application extends WebMvcConfigurerAdapter {

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

MybatisConfig.java

package com.test.blue.config;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import javax.sql.DataSource;

/**
* Created by guanguan on 17/1/17.
*/
@Configuration
@MapperScan("com.test.blue.dao")
public class MybatisConfig {
@Autowired
DataSource dataSource;

@Bean(name = "sqlSessionFactory")
public SqlSessionFactory sqlSessionFactory() throws Exception {
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource);
PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath:/mybatis/*.xml"));
return sqlSessionFactoryBean.getObject();

}
}

Model层的User.java

package com.test.blue.model;

/**
* Created by guanguan on 17/1/17.
*/
public class User {

private Integer id;
private String username;

public Integer getId() {
return id;
}

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

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

}

Dao层的UserMapper.java

package com.test.blue.dao;

import com.test.blue.model.User;

import java.util.HashMap;
import java.util.List;

/**
* Created by guanguan on 17/1/17.
*/
public interface UserMapper {

List<User> findBy(HashMap<?,?> params);

}

Service层的UserService.java

package com.test.blue.service;

import com.test.blue.model.User;

import java.util.HashMap;
import java.util.List;

/**
* Created by guanguan on 17/1/17.
*/
public interface UserService {

List<User> findBy(HashMap<?,?> params);

}

Service层的UserServiceImpl.java

package com.test.blue.service;

import com.test.blue.dao.UserMapper;
import com.test.blue.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.List;

/**
* Created by guanguan on 17/1/17.
*/
@Service
public class UserServiceImpl implements  UserService{
@Autowired
UserMapper userMapper;

public List<User> findBy(HashMap<?,?> params){
return userMapper.findBy(params);
}

}

Myatis下的UserMapper.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.test.blue.dao.UserMapper">
<resultMap type="com.test.blue.model.User" id="userResultMap">
<id property="id" column="id"/>
<result property="username" column="username"/>
</resultMap>

<select id="findBy" resultMap="userResultMap" parameterType="HashMap">
SELECT * FROM `user`;
</select>

</mapper>

controller层文件：

package com.test.blue.controller;

import com.alibaba.fastjson.JSON;
import com.test.blue.model.User;
import com.test.blue.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.HashMap;
import java.util.List;

/**
* Created by guanguan on 17/1/17.
*/
@Controller
public class controller {
@Autowired
UserService userService;

@RequestMapping("/hh")
@ResponseBody
public String hh(){
List<User> userList =userService.findBy(new HashMap<>());
return JSON.toJSONString(userList);
}

}

application.yml文件

server:
port: 8383

spring:
datasource:
url: jdbc:mysql://127.0.0.1/blue?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&autoReconnect=true
username: upgrade
password: upgrade
driverClassName: com.mysql.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource

freemarker:
suffix: .jsp

logging:
level.com.test.blue: debug

------------------------------------------------------------------------

分割线下面是加上freeamrker后的配置：

首先要加上freemarker的依赖

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>

其次yml配置：

server:
port: 8383

spring:
datasource:
url: jdbc:mysql://127.0.0.1/test?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&autoReconnect=true
username: upgrade
password: upgrade
driverClassName: com.mysql.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource

freemarker:
cache: false
templateEncoding: UTF-8
templateLoaderPath: classpath:/templates/  #表示所有的模板文件都在该目录下,也即是前端文件在该目录下
suffix: .html
settings:
locale: zh_CN
date_format: yyyy-MM-dd
time_format: HH:mm:ss
datetime_format: yyyy-MM-dd HH:mm:ss

logging:
level.com.test.data: debug

其中关于freemarker的配置也可放于application.properties文件中(位于resources/目录下的application.properties和application.yml文件功能是一致的，均为项目的配置文件，可配置端口，模板引擎如freemarker,thymedef等，以及数据源，日志等，只是不同的写法而已，yml文件的格式更易观看)

spring.freemarker.suffix=.html
spring.freemarker.template-loader-path=classpath:/templates/
spring.freemarker.charset=UTF-8
spring.freemarker.cache = false

controller层

package com.test.data.controller;

import com.test.data.model.User;
import com.test.data.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.HashMap;
import java.util.List;

/**
* Created by guanguan on 2017/7/20.
*/
@Controller
public class controller {
@Autowired
UserService userService;

@RequestMapping("/")
public String index(ModelMap model){
HashMap<String,Object> params= new HashMap<String, Object>();
List<User> userList= userService.findBy(params);
model.addAttribute("user",userList.get(0));
return "index";
}
}

前端页面（页面略丑，只实现freemarker的功能）index.html

<!DOCTYPE html>
<html lang="zh-cn">
<head>
<title>
freemarker简单练习
</title>
</head>
<body>
<div>
<span>ID:</span>
<button>${user.getId()}</button>
</div>
<div>
<span>姓名:</span>
<button>${user.getUserName()}</button>
</div>

</body>
</html>

运行结果：



此时已经完成springboot+mybatis+mysql+freemarker的基础框架的搭建！