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SpringBoot学习：获取yml和properties配置文件的内容(转)

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



@Autowired


private Environment env;


@Value("${age}")

String name;</br>


@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></br>



        //测试加载properties文件

        System.out.println(env.getProperty("name"));//孙凯

        System.out.println(env.getProperty("abc"));//null

        System.out.println(name);//26


    <span style="color: #0000ff">return</span> "Hello World!"<span style="color: #000000">;</br>
}</span></pre>