java普通类调用mapper或者service方法详解_Java

java普通类调用mapper或者service

第一种

@component
public class test {
    @resource
    securityusermapper securityusermapper;
    public static test test;
    @postconstruct
    public void init(){
        test=this;
        test.securityusermapper=securityusermapper;
    }
    public static securityuserentity select(int id){
        return test.securityusermapper.selectbyid(id);
    }

}

直接 test.select(1);即可

第二种

创建一个srpingutil工具类

package com.helei.util;

import org.springframework.beans.beansexception;
import org.springframework.context.applicationcontext;
import org.springframework.context.applicationcontextaware;
import org.springframework.stereotype.component;

@component
public class springutil implements applicationcontextaware {
    private static applicationcontext applicationcontext = null;

    @override
    public void setapplicationcontext(applicationcontext applicationcontext) throws beansexception {
        // todo auto-generated method stub
        if (springutil.applicationcontext == null) {
            springutil.applicationcontext = applicationcontext;
            system.out.println(
                    "========applicationcontext配置成功,在普通类可以通过调用toolspring.getappcontext()获取applicationcontext对象,applicationcontext="
                            + applicationcontext + "========");
        }
    }

    public static applicationcontext getapplicationcontext() {
        return applicationcontext;
    }

    //通过
    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);
    }

}

package com.helei.util;

import com.helei.mapper.securityusermapper;
import org.junit.test;
import org.junit.runner.runwith;
import org.mybatis.spring.annotation.mapperscan;
import org.springframework.boot.test.context.springboottest;
import org.springframework.test.context.junit4.springrunner;

@runwith(springrunner.class)
@springboottest
public class jzshopapplicationtests {
	

	@test
	public void contextloads() {
		//goodsserviceimpl为我想要获取的service层中的类
		securityusermapper securityusermapper = (securityusermapper)springutil.getbean(securityusermapper.class);
		system.out.println(securityusermapper.selectbyid(1));
	}
}