一、springboot中的main方法注入service

在springboot中使用main方法常规无法注入service,因为以后也可能会有这种情况,所以采取工具类的方式进行,该工具类为固定写法,直接复制就行

@component
public class springcontextutil implements applicationcontextaware {
    private static applicationcontext applicationcontext = null;
 
    @override
    public void setapplicationcontext(applicationcontext applicationcontext) throws beansexception {
        if (springcontextutil.applicationcontext == null) {
            springcontextutil.applicationcontext = applicationcontext;
        }
    }
 
    public static applicationcontext getapplicationcontext() {
        return applicationcontext;
    }
 
    public static object getbean(string name) {
        return getapplicationcontext().getbean(name);
    }
 
    public static <t> t getbean(class<t> clazz) {
        return getapplicationcontext().getbean(clazz);
    }
 
    public static <t> t getbean(string name, class<t> clazz) {
        return getapplicationcontext().getbean(name, clazz);
    }
 
}

然后在需要注入的地方,创建静态service

 private static service service;

然后在需要使用的main方法中:

  public static void main(string[] args) {
        springapplication.run(**application.class,args);
        applicationcontext applicationcontext = springcontextutil.getapplicationcontext();
        service = applicationcontext.getbean(**service.class);
    }

二、springboot 通过main方法调用service或dao

大多数情况下,我们使用springboot是创建一个web项目,然后通过接口访问,但是也有特殊情况,比如线上跑着的web项目,有一些特殊的数据,需要经过计算导入到数据库,这个时候,我们可能需要原来的web项目中的一些service,dao才辅助操作,但是又不能在服务端新开接口。

我们通过springboot的main方法执行这些操作。

此时,service和到需要通过上下文获得。

创建类,并复制下面代码

import org.springframework.beans.beansexception;
import org.springframework.context.applicationcontext;
import org.springframework.context.applicationcontextaware;
import org.springframework.stereotype.component;
/**
 * 普通类调用spring bean对象:
 * 注意:此类需要放到app.java同包或者子包下才能被扫描,否则失效。
 */
@component
public class springutil implements applicationcontextaware{
    private static applicationcontext applicationcontext = null;
    @override
    public void setapplicationcontext(applicationcontext applicationcontext) throws beansexception {
        if(springutil.applicationcontext == null){
            springutil.applicationcontext  = applicationcontext;
        }
    }
    //获取applicationcontext
    public static applicationcontext getapplicationcontext() {
        return applicationcontext;
    }
    //通过name获取 bean.
    public static object getbean(string name){
        return getapplicationcontext().getbean(name);
    }
    //通过class获取bean.
    public static <t> t getbean(class<t> clazz){
        return getapplicationcontext().getbean(clazz);
    }
    //通过name,以及clazz返回指定的bean
    public static <t> t getbean(string name,class<t> clazz){
        return getapplicationcontext().getbean(name, clazz);
    }
}

再创建testapp方法,必须跟springutilfa放到同一目录下

package com.example.demo.test2;
import com.example.demo.controller.aqjg_theperiodcontroller;
import com.example.demo.mapper.appaqjgtaskmapper;
import org.mybatis.spring.annotation.mapperscan;
import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;
import org.springframework.context.applicationcontext;
import java.util.list;
import java.util.map;
@springbootapplication
@mapperscan(basepackages = {"com.example.demo.mapper"})
public class testapp {
    public static void main(string[] args) {
        springapplication.run(testapp.class, args);
        applicationcontext context = springutil.getapplicationcontext();
        aqjg_theperiodcontroller aqjg_theperiodcontroller = new aqjg_theperiodcontroller();
        appaqjgtaskmapper appaqjgtaskmapper = context.getbean(appaqjgtaskmapper.class); //你的dao或service
        list<map<string,object>> list = appaqjgtaskmapper.gettestsmsdata();
        system.out.println("完成");
    }
}

以上为个人经验,希望能给大家一个参考,也希望大家多多支持www.887551.com。