详解SpringBoot读取resource目录下properties文件的常见方式

server.port= 8081

# 自定义参数->都是person.变量名的形式

person.id= 1

person.name=szh

# list/set/数组->两种写法

person.hobby=play,read,write

person.family[ 0 ]=father

person.family[ 1 ]=mother

# map->两种写法

person.map.key1=value1

person.map[key2]=value2

# Entity对象->Pet实体类

person.pet.type=dog

person.pet.name=旺财

import lombok.AllArgsConstructor;

import lombok.Data;

import lombok.NoArgsConstructor;

import java.io.Serializable;

@NoArgsConstructor

@AllArgsConstructor

@Data

public class Pet implements Serializable {

  private String type;

  private String name;

}

import com.szh.test.entity.Pet;

import lombok.Data;

import org.springframework.boot.context.properties.ConfigurationProperties;

import org.springframework.stereotype.Component;

import java.util.List;

import java.util.Map;

@Component

@ConfigurationProperties (prefix = "person" )

@Data

public class PersonConfig {

  private int id;

  private String name;

  private List hobby;

  private String[] family;

  private Map map;

  private Pet pet;

}

@Autowired

  private PersonConfig personConfig;

  @RequestMapping ( "/hello1" )

  public void hello1() {

  System.out.println(personConfig.getFamily());

  System.out.println(personConfig.getHobby());

  System.out.println(personConfig.getMap());

  System.out.println(personConfig.getId());

  System.out.println(personConfig.getName());

  System.out.println(personConfig.getPet().getName());

  }

@Value ( "${person.id}" )

  private int id;

  @Value ( "${person.name}" )

  private String name;

  @Value ( "${person.hobby}" )

  private List hobby;

  @Value ( "${person.family}" )

  private String[] family;

  @Value ( "${person.map}" )

  private Map map;

  @Value ( "${person.pet}" )

  private Pet pet;

@Autowired

  private Environment env;

  @RequestMapping ( "/hello1" )

  public void hello1() throws UnsupportedEncodingException {

  String id = env.getProperty( "person.id" );

  // 中文

  String name = new String(env.getProperty( "person.name" ).getBytes( "ISO-8859-1" ), "UTF-8" );

  List hobby = new ArrayList();

  hobby.add(env.getProperty( "person.hobby[0]" ));

  hobby.add(env.getProperty( "person.hobby[1]" ));

  String[] family;

  Map<String,String> map = new HashMap<String,String>();

  map.put( "key1" , env.getProperty( "person.map.key1" ));

  map.put( "key2" , env.getProperty( "person.map.key2" ));

  Pet pet = new Pet(env.getProperty( "person.pet.type" ),env.getProperty( "person.pet.name" ));

  }

person.id= 1

person.name=szh

# list/set/数组->两种写法

person.hobby=play,read,write

person.family[ 0 ]=father

person.family[ 1 ]=mother

# map->两种写法

person.map.key1=value1

person.map[key2]=value2

# Entity对象

person.pet.type=dog

person.pet.name=旺财

@Component

@PropertySource (value = "classpath:szh.properties" )

@ConfigurationProperties (prefix = "person" )

@Data

public class PersonConfig {

  private int id;

  private String name;

  private List hobby;

  private String[] family;

  private Map map;

  private Pet pet;

}

@Component

@PropertySource (value = "classpath:szh.properties" )

@Data

public class PersonConfig {

  @Value ( "${person.id}" )

  private int id;

  @Value ( "${person.name}" )

  private String name;

  @Value ( "${person.hobby}" )

  private List hobby;

  @Value ( "${person.family}" )

  private String[] family;

  @Value ( "${person.map}" )

  private Map map;

  @Value ( "${person.pet}" )

  private Pet pet;

}

//读取资源配置文件

  InputStream is = Bean. class .getClassLoader().getResourceAsStream( "szh.properties" );

  prop = new Properties();

  String className = "person.name" ; //可以作为一个函数的变量

  try {

   prop.load(is);

   String pathName = prop.getProperty(className);

  } catch (Exception e) {

   throw new RuntimeException( "xxxx" );

  }