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

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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：

<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;@RequestMapping("/") @ResponseBody String home(HttpServletRequest req) throws JsonProcessingException, UnsupportedEncodingException { logger.info("测试通过！！！"); 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()));

//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

return "Hello World!"; }</pre>