SpringMVC配置太多?试试SpringBoot

Java基础

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2020-5-30

SpringMVC相信大家已经不再陌生了,大家可能对于Spring的各种XML配置已经产生了厌恶的感觉,Spring官方发布的Springboot 已经很长时间了,Springboot是一款“约定优于配置”的轻量级框架;Springboot首先解决的就是各种繁琐的XML配置,你可以不用任何XML配置,进行web服务的搭建,其次是Springboot本身就继承了web服务器,如果说前端开发人员想在本地启动后端服务不需要进行各种配置,几乎可以做到一键启动。

再有就是目前大热的微服务,而Springboot恰恰满足了快速开发微服务的开发场景;对于目前主流的框架Spring+MyBatis+redis的集成,好吧直接看代码…

以下代码是整个开发框架集成完之后的,关于Spring官方那一套如何编写启动类,如何配置端口这些随便google一大把的我就不再本文说明了。下面的代码,mybatis mapper我就不贴了,平常怎么写现在也一样,还有redis存数据取数据什么的。本文给的都是划的重点啊!

1.数据源以及其他的配置文件(PS:说好了不配置,怎么刚开始就上配置? 答:不配置也可以,如果你想把数据源硬编码写死的话。^_^)

下面给的是YML的配置文件方式,YML被各种主流的开发语言所支持,相当于常见的.properties文件。

jedis : 
  pool : 
    host : 127.0.0.1 
    port : 6379 
    config : 
      maxTotal: 100 
      maxIdle: 10 
      maxWaitMillis : 100000
server : 
  port :  8080
   
jdbc:
    datasource:
        name: test
        url: jdbc:mysql://127.0.0.1:3306/test
        username: root
        password: 123456
        # 使用druid数据源
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.jdbc.Driver
        filters: stat
        maxActive: 20
        initialSize: 1
        maxWait: 60000
        minIdle: 1
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: select 'x'
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        poolPreparedStatements: true
        maxOpenPreparedStatements: 20
     
# LOGGING
logging:
    level:
       com.ibatis:DEBUG

 2.Springboot启动类

package com.tony.spring.boot;
import org.mybatis.spring.annotation.MapperScan;
import org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer;
import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.boot.web.support.SpringBootServletInitializer;
/**
 * Created by zhang.tao on 2017/4/19.
 */
@SpringBootApplication(exclude = MybatisAutoConfiguration.class)
@ServletComponentScan
@EnableAutoConfiguration
@MapperScan("com.tony.spring.boot.mapper")
public class Application  extends SpringBootServletInitializer implements EmbeddedServletContainerCustomizer {
    @Value("${server.port}")
    private int port;//应用的端口
    /**
     * 启动入口
     * @param args
     */
    public static void main(String ... args){
        SpringApplication.run(Application.class, args);
    }
    /**
     * 自定义端口
     */
    @Override
    public void customize(ConfigurableEmbeddedServletContainer container) {
        container.setPort(port);       
    }
}

3.配置Mysql数据源 

import java.sql.SQLException;
import javax.sql.DataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.bind.RelaxedPropertyResolver;
import org.springframework.context.EnvironmentAware;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import com.alibaba.druid.pool.DruidDataSource;
@Configuration
@EnableTransactionManagement
public class DataBaseConfiguration implements EnvironmentAware {
    private RelaxedPropertyResolver propertyResolver;
    private static Logger log = LoggerFactory.getLogger(DataBaseConfiguration.class);
    private Environment env;
    @Override
    public void setEnvironment(Environment env) {
        this.env = env;
        this.propertyResolver = new RelaxedPropertyResolver(env, "jdbc.datasource.");
    }
    /**
     * 配置数据源
     * @Description TODO
     * @return
     */
    @Bean(name = "dataSource",destroyMethod = "close")
    public DataSource dataSource() {
        log.debug(env.getActiveProfiles().toString()); 
          
         DruidDataSource dataSource = new DruidDataSource(); 
         dataSource.setUrl(propertyResolver.getProperty("url")); 
         dataSource.setUsername(propertyResolver.getProperty("username"));//用户名 
         dataSource.setPassword(propertyResolver.getProperty("password"));//密码 
         dataSource.setDriverClassName(propertyResolver.getProperty("driver-class-name"));
         dataSource.setInitialSize(Integer.parseInt(propertyResolver.getProperty("initialSize"))); 
         dataSource.setMaxActive(Integer.parseInt(propertyResolver.getProperty("maxActive"))); 
         dataSource.setMinIdle(Integer.parseInt(propertyResolver.getProperty("minIdle"))); 
         dataSource.setMaxWait(Integer.parseInt(propertyResolver.getProperty("maxWait"))); 
         dataSource.setTimeBetweenEvictionRunsMillis(Integer.parseInt(propertyResolver.getProperty("timeBetweenEvictionRunsMillis"))); 
         dataSource.setMinEvictableIdleTimeMillis(Integer.parseInt(propertyResolver.getProperty("minEvictableIdleTimeMillis"))); 
         dataSource.setValidationQuery(propertyResolver.getProperty("validationQuery")); 
         dataSource.setTestOnBorrow(Boolean.getBoolean(propertyResolver.getProperty("testOnBorrow"))); 
         dataSource.setTestWhileIdle(Boolean.getBoolean(propertyResolver.getProperty("testWhileIdle"))); 
         dataSource.setTestOnReturn(Boolean.getBoolean(propertyResolver.getProperty("testOnReturn"))); 
         dataSource.setPoolPreparedStatements(Boolean.getBoolean(propertyResolver.getProperty("poolPreparedStatements"))); 
         dataSource.setMaxPoolPreparedStatementPerConnectionSize(Integer.parseInt(propertyResolver.getProperty("maxOpenPreparedStatements"))); 
         try {
            dataSource.init();
        } catch (SQLException e) {
             
        }
         return dataSource;
    }
}

4.Redis数据源配置.

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
/**
 * 配置redis数据源
 *
 * @ClassName RedisConfig
 * @author Zhang.Tao
 * @Date 2017年4月24日 下午5:25:30
 * @version V2.0.0
 */
@Configuration
public class RedisConfig {
      
     
  @Bean(name= "jedis.pool") 
  @Autowired 
  public JedisPool jedisPool(@Qualifier("jedis.pool.config") JedisPoolConfig config,  
              @Value("${jedis.pool.host}")String host,  
              @Value("${jedis.pool.port}")int port) { 
      return new JedisPool(config, host, port); 
  } 
     
  @Bean(name= "jedis.pool.config") 
  public JedisPoolConfig jedisPoolConfig (@Value("${jedis.pool.config.maxTotal}")int maxTotal, 
                              @Value("${jedis.pool.config.maxIdle}")int maxIdle, 
                              @Value("${jedis.pool.config.maxWaitMillis}")int maxWaitMillis) { 
      JedisPoolConfig config = new JedisPoolConfig(); 
      config.setMaxTotal(maxTotal); 
      config.setMaxIdle(maxIdle); 
      config.setMaxWaitMillis(maxWaitMillis); 
      return config; 
  }
}

 

5.API接口代码(是不是很6,想不想赞一下?)

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.tony.spring.boot.entity.UserInfo;
import com.tony.spring.boot.mapper.UserInfoMapper;
import com.tony.spring.boot.utils.JsonUtil;
import com.tony.spring.boot.utils.RedisUtil;
/**
 * Created by Administrator on 2017/4/19.
 */
@RestController
@RequestMapping(value="/test")
public class TestCtrl {
     
    @Autowired
    private RedisUtil redisUtil;
     
    @Autowired 
    private UserInfoMapper userInfoMapper; 
    @RequestMapping(value="/index")
    public String index(){
        return "hello world";
    }
     
    /**
     * 向redis存储值
     * @param key
     * @param value
     * @return
     * @throws Exception
     */
    @RequestMapping("/set") 
    public String set(String key, String value) throws Exception{ 
        redisUtil.set(key, value); 
        return "success"; 
    } 
     
    /**
     * 获取redis中的值
     * @param key
     * @return
     */
    @RequestMapping("/get") 
    public String get(String key){ 
        try {
            return redisUtil.get(key);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ""; 
    } 
     
    /**
     * 获取数据库中的用户
     * @Description TODO
     * @param id
     * @return
     */
    @RequestMapping("/getUser/{id}") 
    public String get(@PathVariable("id")int id){ 
        try {
            System.err.println(id);
            UserInfo user= userInfoMapper.selectByPrimaryKey(id);
            return JsonUtil.getJsonString(user);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ""; 
    } 
}

6.到这里基本上核心的东西差不多了,去Application.java启动就能用了。赶快试试吧

感谢各位开发者在评论中对错误冗余的配置加以指正,本人亲测后已将错误或者多余的部分代码移除了。

最新代码欢迎star https://github.com/xiaour/SpringBootDemo

作者:xiaour