閒來沒事，中午學了spring boot 感覺還不錯，避免了繁瑣的配置檔案，提高開發效率還不錯。個人認為spring boot也就簡化配置而已。在學習中也遇到一些問題，@Autowired無法自動裝入bean,是由於對spring boot 不夠了解，先上程式碼吧

專案結構

專案說名，spring boot jdbcTemplate自定義sql 查詢mysql 資料庫資料
maven結構
基本的controller service serviceimpl 就不用說了
Data 是自己的工具類，

建好專案後先搞pom.xml，用到什麼加什麼依賴，倉庫沒有的話，下載慢的話可以配置阿里的映象maven倉庫，速度不錯，比國外的塊多了，方法：maven 的setting.xml 只需加入

pom.xml
我的pom.xml 是用到什麼引入什麼。大家不一定和我的一樣，有些是必須的，

<dependencies>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
     <dependency>  
        <groupId>org.springframework.boot</groupId>  
        <artifactId>spring-boot-starter-web</artifactId>  
    </dependency>

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

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

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

    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.21</version>
    </dependency>

</dependencies>

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

屬性配置檔案applocations.properties

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/zanghan
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=5
spring.datasource.initial-size=5

server.port=8080
server.session.timeout=10
server.tomcat.uri-encoding=UTF-8

Application為程式入口

package com.zanghan.myProject;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {

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

}

UserService 介面

package com.zanghan.myProject.service;

import org.springframework.stereotype.Component;

import com.zanghan.myProject.Data.IDataset;

@Component //這個不加的話，@Autowired將找不到bean
public interface UserService {

public IDataset queryUserList();

}

UserserviceImpl 實現類

package com.zanghan.myProject.serviceImpl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.zanghan.myProject.Data.BaseDAO;
import com.zanghan.myProject.Data.IDataset;
import com.zanghan.myProject.service.UserService;

@Service
public class UserServiceImpl implements UserService {

@Autowired
private BaseDAO baseDAO;

@Override
public IDataset queryUserList() {
    String sql = "select * from user";
    return baseDAO.query(sql,null);
}

}

UserController控制器

package com.zanghan.myProject.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.zanghan.myProject.Data.IDataset;
import com.zanghan.myProject.service.UserService;

@RestController
@RequestMapping(“/user”)
public class UserController {
@Autowired
private UserService userService;

@RequestMapping("/getUsers")
public IDataset getUserList(){
    IDataset userList=userService.queryUserList();
    return userList;
}

}
執行直接訪問
localhost:8080/user/getUsers/
可根據你傳的sql得到資料庫的資料，

不使用我的工具類，同樣實現方式*
工具類為讀寫分離實現，BaseDao封裝jdbcTemplate處理,IDataset 是對json資料的處理接收，當然也可以不用工具類，sql ,jdbcTemplate處理.也就是修改接收查到的資料格式而已

service 層

@Component //這個不加的話，@Autowired將找不到bean
public interface UserService {

public List<Map<String, Object>> queryUserList();

}

serviceImpl實現層

public class UserServiceImpl implements UserService {

@Autowired
private JdbcTemplate jdbcTemplate;
public List<Map<String, Object>> queryUserList(){
    String sql = "select * from appuser";
    List<Map<String, Object>> list =  jdbcTemplate.queryForList(sql);
    return list;
}

}
控制層便不寫了，同樣呼叫service ，資料接收不同而已