一：

公司主營業(yè)務(wù)：網(wǎng)站設(shè)計制作、做網(wǎng)站、移動網(wǎng)站開發(fā)等業(yè)務(wù)。幫助企業(yè)客戶真正實現(xiàn)互聯(lián)網(wǎng)宣傳，提高企業(yè)的競爭能力。創(chuàng)新互聯(lián)公司是一支青春激揚、勤奮敬業(yè)、活力青春激揚、勤奮敬業(yè)、活力澎湃、和諧高效的團隊。公司秉承以“開放、自由、嚴謹、自律”為核心的企業(yè)文化，感謝他們對我們的高要求，感謝他們從不同領(lǐng)域給我們帶來的挑戰(zhàn)，讓我們激情的團隊有機會用頭腦與智慧不斷的給客戶帶來驚喜。創(chuàng)新互聯(lián)公司推出魯?shù)槊赓M做網(wǎng)站回饋大家。

package com.zcp.springstart2;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.context.ConfigurableApplicationContext;

@SpringBootApplication

public class App {

public static void main(String[] args) {

ConfigurableApplicationContext context = SpringApplication.run(App.class, args);

System.out.println(System.getProperty("file.encoding"));

System.out.println(context.getBeansOfType(EncodingConvert.class));

System.out.println(">>>>>>>>>>>>>start>>>>>>>>>>>>");

System.out.println(context.getBeansOfType(Runnable.class));

System.out.println(">>>>>>>>>>>>>end>>>>>>>>>>>>");

context.close();

}

}

接口：

package com.zcp.springstart2;

public interface EncodingConvert {

}

接口的實現(xiàn):

package com.zcp.springstart2;

public class UTF8EncodingConvert implements EncodingConvert {

}

package com.zcp.springstart2;

public class GBKEncodingConvert implements EncodingConvert {

}

package com.zcp.springstart2;

import org.springframework.context.annotation.Condition;

import org.springframework.context.annotation.ConditionContext;

import org.springframework.core.type.AnnotatedTypeMetadata;

public class GBKCondition implements Condition {

@Override

public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {

String encoding = System.getProperty("file.encoding");

if(null != encoding){

return "gbk".equals(encoding.toLowerCase());

}

return false;

}

}

package com.zcp.springstart2;

import org.springframework.context.annotation.Condition;

import org.springframework.context.annotation.ConditionContext;

import org.springframework.core.type.AnnotatedTypeMetadata;

public class UTF8Condition implements Condition {

@Override

public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {

String encoding  = System.getProperty("file.encoding");

if(null != encoding){

return "utf-8".equals(encoding.toLowerCase());

}

return false;

}

}

常用的conditional的使用:

package com.zcp.springstart2;

import org.springframework.boot.SpringBootConfiguration;

import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;

import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;

import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;

import org.springframework.context.annotation.Bean;

@SpringBootConfiguration

public class UserConfig {

@Bean

@ConditionalOnProperty(name="runnable.enabled",havingValue="true",matchIfMissing=true)

public Runnable createRunnable(){

return new Runnable() {

@Override

public void run() {

System.out.println("UserConfig中的Runnable");

}

};

}

@Bean

@ConditionalOnClass(name="com.zcp.springstart2.User")

public Runnable createRunnableOnClass(){

return new Runnable() {

@Override

public void run() {

System.out.println("UserConfig中的createRunnableOnBean");

}

};

}

@Bean

@ConditionalOnBean(name="user")

public Runnable createRunnableOnBean(){

return new Runnable() {

@Override

public void run() {

System.out.println("UserConfig中的createRunnableOnBean");

}

};

}

}