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在springbooot中properties文件类型作为最常用的配置文件格式之一,常用的简单类型不用多说,主要了解下properties中的各种复杂类型(List、Map类型及所包含的复杂泛型)的配置,使得能够更加丰富我们开发中配置文件的数据结构,包括:List<实体类>、List<Map<String,Object>>、List<List<String>>、List<List<实体类>>、List<Map<String,实体类>>、Map<String,实体类>、Map<String,List<Object/String>>、Map<String,List<实体类>>
等。
本测试使用最简单的springboot web项目做测试springboot版本为2.3.4,properties配置为了方便直接放在application.properties中,测试项目结构如下图,且测试代码直接写到ApplicationRunner的实现类中,项目启动时直接执行测试类。
测试pom文件如下:
# properties中简单的map
test.coll.maps.key1=value1
test.coll.maps.key2=value2
# properties中简单的list
test.coll.list[0]=value0
test.coll.list[1]=value1
除却上面配置方式外还有本人感觉更简单且好理解的配置方式:
# properties中简单的list
test.coll.list=value0,value2
# properties中简单的map
test.coll.maps[key1]=value1
test.coll.maps[key2]=value2
@Slf4j
@Configuration
@ConfigurationProperties(prefix = "test.coll")
@Data
public class TestConf01{
private Map<String, Object> maps;
private List<String> list;
}
@Slf4j
@Order(1)
@Component
public class TestRunner01 implements ApplicationRunner {
@Autowired
private TestConf testConf;
@Override
public void run(ApplicationArguments args) {
// 测试简单map类型
val mapsJson = JSON.toJSONString(testConf.getMaps());
log.info("这是简单map类型:{}", mapsJson);
// 测试简单list类型
val listJson = JSON.toJSONString(testConf.getList());
log.info("这是简单list类型:{}", listJson);
}
}
本节主要讲解复杂性list配置,包括List<实体类>、List<Map<String,Object>>、List<List<String>>、List<List<实体类>>、List<Map<String,实体类>>
等,这些类型对list在配置文件中的应用已经够用,如需更加复杂的配置,我们按照文档中例中的简单到复杂,一维到二维的规律继续推演即可。
# properties中复杂类型list,泛型为实体类(List<Person>)
test.coll.list.list-person[0].name=tom
test.coll.list.list-person[0].age=18
test.coll.list.list-person[1].name=jerry
test.coll.list.list-person[1].age=20
# properties中复杂类型list,泛型为Map(List<Map<String,Object>>)
test.coll.list.list-map[0].key1=value1
test.coll.list.list-map[0].key2=value2
test.coll.list.list-map[1].key2=value2
test.coll.list.list-map[1].key3=value3
# properties中复杂类型list,泛型为List(List<List<String>>)
test.coll.list.list-list[0][0]=value1
test.coll.list.list-list[0][1]=value2
test.coll.list.list-list[1][0]=value3
test.coll.list.list-list[1][1]=value4
# properties中复杂list,list中为List<实体类>
test.coll.list.list-list-person[0][0].name=tom1
test.coll.list.list-list-person[0][0].age=18
test.coll.list.list-list-person[0][1].name=jerry1
test.coll.list.list-list-person[0][1].age=20
test.coll.list.list-list-person[1][0].name=tom2
test.coll.list.list-list-person[1][0].age=18
test.coll.list.list-list-person[1][1].name=jerry2
test.coll.list.list-list-person[1][1].age=20
# properties中复杂list,list中为Map<String,实体类>>
test.coll.list.list-map-person[0].person1[name]=tom1
test.coll.list.list-map-person[0].person1[age]=18
test.coll.list.list-map-person[0].person2[name]=jerry1
test.coll.list.list-map-person[0].person2[age]=20
test.coll.list.list-map-person[1].person3[name]=tom2
test.coll.list.list-map-person[1].person3[age]=18
test.coll.list.list-map-person[1].person4[name]=jerry2
test.coll.list.list-map-person[1].person4[age]=20
@Slf4j
@Configuration
@ConfigurationProperties(prefix = "test.coll.list")
@Data
public class TestConf02 {
// 复杂类型list,泛型为实体类(List<Person>)
private List<Person> listPerson;
// 复杂类型list,泛型为Map(List<Map<String,Object>>)
private List<Map<String, Object>> listMap;
// 复杂类型list,泛型为List(List<List<String>>)
private List<List<String>> listList;
// 复杂list,list中为List<实体类>
private List<List<Person>> listListPerson;
// 复杂list,list中为Map<String,实体类>>
private List<Map<String,Person>> listMapPerson;
@Data
public static class Person {
private String name;
private int age;
}
}
@Slf4j
@Order(2)
@Component
public class TestRunner02 implements ApplicationRunner {
@Autowired
private TestConf02 testConf;
@Override
public void run(ApplicationArguments args) {
// 复杂类型list,泛型为实体类(List<Person>)
val json1 = JSON.toJSONString(testConf.getListPerson());
log.info("复杂list,list中为实体类:{}", json1);
// 复杂类型list,泛型为Map(List<Map<String,Object>>)
val json2 = JSON.toJSONString(testConf.getListMap());
log.info("复杂list,list中为Map:{}", json2);
// 复杂类型list,泛型为List(List<List<String>>)
val json3 = JSON.toJSONString(testConf.getListList());
log.info("复杂list,list中为List<String>:{}", json3);
// 复杂类型list,泛型为List(List<List<Person>>)
val json4 = JSON.toJSONString(testConf.getListListPerson());
log.info("复杂list,list中为List<实体类>:{}", json4);
// 复杂类型list,泛型为List(List<Map<String,Person>>)
val json5 = JSON.toJSONString(testConf.getListMapPerson());
log.info("复杂list,list中为Map<String,实体类>:{}", json5);
}
}
本节主要讲解复杂性list配置,包括Map<String,实体类>、Map<String,List<Object/String>>、Map<String,List<实体类>>
讲解和实例
#-------------------------------------------------------Map复杂类型-----------------------------------------------------
# Map<String, 实体类>
test.coll.map.map-person.person1[name]=tom
test.coll.map.map-person.person1[age]=18
test.coll.map.map-person.person2[name]=jerry
test.coll.map.map-person.person2[age]=20
# Map<String, List<Object/String>>
test.coll.map.map-list.key1[0]=value1
test.coll.map.map-list.key1[1]=value2
test.coll.map.map-list.key2[0]=value3
test.coll.map.map-list.key2[1]=value4
# Map<String, List<实体类>>,
# test.coll.map.map-list-person.Map中的key[list类型value的下标].实体类的属性名=tom1
test.coll.map.map-list-person.person1[0].name=tom1
test.coll.map.map-list-person.person1[0].age=18
test.coll.map.map-list-person.person1[1].name=jerry1
test.coll.map.map-list-person.person1[1].age=20
test.coll.map.map-list-person.person2[0].name=tom2
test.coll.map.map-list-person.person2[0].age=18
test.coll.map.map-list-person.person2[1].name=jerry2
test.coll.map.map-list-person.person2[1].age=20
@Slf4j
@Configuration
@ConfigurationProperties(prefix = "test.coll.map")
@Data
public class TestConf03 {
// Map<String,Person>
private Map<String, TestConf02.Person> mapPerson;
// Map<String,List<Object>>
private Map<String, List<Object>> mapList;
// Map<String,List<Person>>
private Map<String, List<TestConf02.Person>> mapListPerson;
}
@Slf4j
@Order(3)
@Component
public class TestRunner03 implements ApplicationRunner {
@Autowired
private TestConf03 testConf;
@Override
public void run(ApplicationArguments args) {
// 泛型为实体类:Map<String,Person>
val json1 = JSON.toJSONString(testConf.getMapPerson());
log.info("复杂Map,Map<String,实体类>:{}", json1);
// 泛型为实体类:Map<String,List<Object>
val json2 = JSON.toJSONString(testConf.getMapList());
log.info("复杂Map,Map<String,List<Object>:{}", json2);
// 泛型为实体类:Map<String,List<Person>
val json3 = JSON.toJSONString(testConf.getMapListPerson());
log.info("复杂Map,Map<String,List<Person>:{}", json3);
}
}
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