正文
SpringBoot学习：获取yml和properties配置文件的内容（转）
提示：扫一扫查出行【扫一扫了解最新限行尾号】
复制提示
项目下载地址：http://download.csdn.net/detail/aqsunkai/9805821
（一）yml配置文件：
pom.xml加入依赖：
<!-- 支持 @ConfigurationProperties 注解 -->
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-configuration-processor -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<version>${spring-boot.version}</version>
</dependency>
在application.yml文件中加上：
#自定义的属性和值
myYml:
simpleProp: simplePropValue
arrayProps: 1,2,3,4,5
listProp1:
- name: abc
value: abcValue
- name: efg
value: efgValue
listProp2:
- config2Value1
- config2Vavlue2
mapProps:
key1: value1
key2: value2
使用一个java类获取yml文件的内容：
package com.sun.configuration; import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component; import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map; /**
- 加载yaml配置文件的方法
- Created by sun on 2017-1-15.
- spring-boot更新到1.5.2版本后locations属性无法使用
- @PropertySource注解只可以加载proprties文件,无法加载yaml文件
-
故现在把数据放到application.yml文件中,spring-boot启动时会加载
*/
@Component
//@ConfigurationProperties(locations = {"classpath:config/myProps.yml"},prefix = "myProps")
@ConfigurationProperties(prefix = "myYml")
public class YmlConfig { String simpleProp;
private String[] arrayProps;
private List<Map<String, String>> listProp1 = new ArrayList<>(); //接收prop1里面的属性值
private List<String> listProp2 = new ArrayList<>(); //接收prop2里面的属性值
private Map<String, String> mapProps = new HashMap<>(); //接收prop1里面的属性值 public String getSimpleProp() {
return simpleProp;
} //String类型的一定需要setter来接收属性值；maps, collections, 和 arrays 不需要
public void setSimpleProp(String simpleProp) {
this.simpleProp = simpleProp;
}
public String[] getArrayProps() {
return arrayProps;
} public void setArrayProps(String[] arrayProps) {
this.arrayProps = arrayProps;
}
public List<Map<String, String>> getListProp1() {
return listProp1;
}
public void setListProp1(List<Map<String, String>> listProp1) {
this.listProp1 = listProp1;
} public List<String> getListProp2() {
return listProp2;
} public void setListProp2(List<String> listProp2) {
this.listProp2 = listProp2;
} public Map<String, String> getMapProps() {
return mapProps;
} public void setMapProps(Map<String, String> mapProps) {
this.mapProps = mapProps;
}
}
通过依赖注入就可以获取该对象：
@Autowired
private YmlConfig config;
方法内获取值：
ObjectMapper objectMapper = new ObjectMapper();
//测试加载yml文件
System.out.println("simpleProp: " + config.getSimpleProp());
System.out.println("arrayProps: " + objectMapper.writeValueAsString(config.getArrayProps()));
System.out.println("listProp1: " + objectMapper.writeValueAsString(config.getListProp1()));
System.out.println("listProp2: " + objectMapper.writeValueAsString(config.getListProp2()));
System.out.println("mapProps: " + objectMapper.writeValueAsString(config.getMapProps()));
（二）properties配置文件：
使用@PropertySource注解加载配置文件，该注解无法加载yml配置文件。使用@Value注解获得文件中的参数值
package com.sun.configuration; import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer; /**
- 加载properties配置文件,在方法中可以获取
- abc.properties文件不存在,验证ignoreResourceNotFound属性
- 加上encoding = "utf-8"属性防止中文乱码,不能为大写的"UTF-8"
-
Created by sun on 2017-3-30.
*/
@Configuration
@PropertySource(value = {"classpath:/config/propConfigs.properties","classpath:/config/abc.properties"},
ignoreResourceNotFound = true,encoding = "utf-8")
public class PropConfig { // PropertySourcesPlaceholderConfigurer这个bean，
// 这个bean主要用于解决@value中使用的${…}占位符。
// 假如你不使用${…}占位符的话，可以不使用这个bean。
@Bean
public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
return new PropertySourcesPlaceholderConfigurer();
}
}
获取properties文件参数值有两种方法，一种获得Environment 的对象，第二种就是@Value注解
private Environment env;
@Value("${age}")
String name;
@RequestMapping(</span>"/"<span style="color: #000000">)</br>
@ResponseBody</br>
String home(HttpServletRequest req) </span><span style="color: #0000ff">throws</span><span style="color: #000000"> JsonProcessingException, UnsupportedEncodingException {</br>
logger.info(</span>"测试通过！！！"<span style="color: #000000">);</br>
ObjectMapper objectMapper </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> ObjectMapper();</br>
</span><span style="color: #008000">//</span><span style="color: #008000">测试加载yml文件</span></br>
System.out.println("simpleProp: " +<span style="color: #000000"> config.getSimpleProp());</br>
System.out.println(</span>"arrayProps: " +<span style="color: #000000"> objectMapper.writeValueAsString(config.getArrayProps()));</br>
System.out.println(</span>"listProp1: " +<span style="color: #000000"> objectMapper.writeValueAsString(config.getListProp1()));</br>
System.out.println(</span>"listProp2: " +<span style="color: #000000"> objectMapper.writeValueAsString(config.getListProp2()));</br>
System.out.println(</span>"mapProps: " +<span style="color: #000000"> objectMapper.writeValueAsString(config.getMapProps()));</br></br>
</span><span style="color: #008000">//</span><span style="color: #008000">测试加载properties文件</span></br>
System.out.println(env.getProperty("name"));<span style="color: #008000">//</span><span style="color: #008000">孙凯</span></br>
System.out.println(env.getProperty("abc"));<span style="color: #008000">//</span><span style="color: #008000">null</span></br>
System.out.println(name);<span style="color: #008000">//</span><span style="color: #008000">26</span></br>
<span style="color: #0000ff">return</span> "Hello World!"<span style="color: #000000">;</br>
}</span></pre>
