經過springboot+mybatis+mysql+freemarker建立一個java web項目

時間 2019-11-08

標籤經過 springboot+mybatis+mysql+freemarker springboot mybatis mysql freemarker 建立一個 java web 項目欄目 Spring 简体版

原文原文鏈接

項目地址詳見：html

https://github.com/gholly/springboot-java-web-freemarker.git前端

1.File->New->Project：點擊maven構建maven項目，而後點擊next，java

進而填寫項目名稱：mysql

點擊finish便可。git

2.springboot初探,搭建一個基礎的java web項目github

pom.xml文件web

<?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>

建立applicationwenspring

Application.java文件：sql

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apache

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;
    }
}

而後運行application.java文件，運行成功後，在瀏覽器上輸入localhost:8080/

3.用springboot結合mybatis實現一個java web項目

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>

        <!--數據源-->
        <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層的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層的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層的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層的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層文件：

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

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

分割線下面是加上freeamrker後的配置：

首先要加上freemarker的依賴

<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/  #表示全部的模板文件都在該目錄下,也便是前端文件在該目錄下
    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

其中關於freemarker的配置也可放於application.properties文件中(位於resources/目錄下的application.properties和application.yml文件功能是一致的，均爲項目的配置文件，可配置端口，模板引擎如freemarker,thymedef等，以及數據源，日誌等，只是不一樣的寫法而已，yml文件的格式更易觀看)

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

controller層

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";
    }
}

前端頁面（頁面略醜，只實現freemarker的功能）index.html

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

</body>
</html>

運行結果：

此時已經完成springboot+mybatis+mysql+freemarker的基礎框架的搭建！