使用springboot配置和占位符获取配置文件中的值

package com.example.springbootdemo.pojo; 
import com.alibaba.fastJSON.jsON;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;
 

 

 
@Component

@ConfigurationProperties(prefix = "persion")
public class Persion {  
    private String name;
    private Integer id;
    private Boolean bool;  
    public Persion() {
    }  
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public Integer getId() {
        return id;
    }
 
    public void setId(Integer id) {
        this.id = id;
    }
 
    public Boolean getBool() {
        return bool;
    }
 
    public void setBool(Boolean bool) {
        this.bool = bool;
    }
 
    @Override
    public String toString() {
        return JSON.toJSONString( this );
    }
}

package com.example.springbootdemo.configration;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.Redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;

@Configuration
public class DataConfig { 
 
    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory factory) {
        RedisTemplate template = new RedisTemplate();
        template.setConnectionFactory(factory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility( PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping( ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();
        return template;
    } 
}

 
#通过使用占位符赋值
persion.name=张三${random.value}
persion.bool=false
persion.id=12${random.int}
 
person.last‐name=张三${random.uuid}
person.age=${random.int} 
person.birth=2017/12/15 person.boss=false 
person.maps.k1=v1 person.maps.k2=14 person.lists=a,b,c 
person.dog.name=${person.hello:hello}_dog 
person.dog.age=15

package com.example.springdemo.entity;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;
import org.springframework.validation.annotation.Validated; 
import java.util.List;
 
@Component//把User加到容器中
@Data

@ConfigurationProperties(prefix = "com")
public class User {
    private Long id;
    private String name;
    private Integer age;
    private List<Object>list;
    public Long getId() {
        return id;
    }
 
    public void setId(Long id) {
        this.id = id;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public Integer getAge(int i) {
        return age;
    }
 
    public void setAge(Integer age) {
        this.age = age;
    }
 
    public String getEmail() {
        return email;
    }
 
    public void setEmail(String email) {
        this.email = email;
    }
 
    private String email;
 
    public Integer getAge() {
        return age;
    }
 
    public List<Object> getList() {
        return list;
    }
 
    public void setList(List<Object> list) {
        this.list = list;
    }
}

com.email=99@dfp.com
com.name=newDFP${com.cc:不存在给默认值}
com.age=${random.int}

package com.example.springdemo; 
import com.example.springdemo.entity.User;
import com.example.springdemo.mapper.UserMapper;
import com.example.springdemo.properties.Myproperties;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ApplicationContext;
import org.springframework.test.context.junit4.SpringRunner;
 
import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.List;
 
@SpringBootTest
@RunWith(SpringRunner.class)
class SpringdemoApplicationTests {
 
//如果测试类与启动入口类包名不一致，必须加该注解属性classes指定启动入口类，否则无法启动SpringBoot
        @Autowired
        private DataSource dataSource;
 
        @Test
        public void dataSource() {
            try {
                System.out.println(dataSource.getConnection());
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    @Autowired
    Myproperties myproperties;
    @Test
    void test(){
        System.out.println("------------------------");
        System.out.println(myproperties.getMes());
    }
 
    @Autowired
    UserMapper userMapper;
    @Test
    void testmybatisPlus(){
        List<User> users=userMapper.selectList(null);
        for (User user:users){
            System.out.println(user);
        }
        System.out.println("查询成功！");
        User aduuser=new User();
//        aduuser.setName("DFP");
//        aduuser.setAge(18);
//        aduuser.setEmail("DFP19053025@qq.com");
//        aduuser.setId(19053065L);
        int i=userMapper.insert(aduuser);
        if (i>0){
            System.out.println("成功加入记录！");
        }else{ System.out.println("失败加入记录！");}
        for (User user:users){
            System.out.println(user);
        } 
    }
 
    @Autowired
    User user;
    @Test
    public void contextlodes(){
        System.out.println("测试结果输出："+user);
    }
}

com.email=99@dfp.com
com.name=newDFP+++${com.email:不存在给默认值}
com.age=${random.int}