spring-boot读取props和yml配置文件的方法
最近微框架spring-boot很火，笔者也跟风学习了一下，废话不多说，现给出一个读取配置文件的例子。
首先，需要在pom文件中依赖以下jar包
org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test
其次，我们需要一个spring-boot启动类
@SpringBootApplication
@EnableConfigurationProperties({PropsConfig.class,YmlConfig.class})
publicclassReadApplication{
publicstaticvoidmain(String[]args){
SpringApplication.run(ReadApplication.class,args);
}
}
没错，@EnableConfigurationProperties注解里指出的PropsConfig.class,YmlConfig.class分别就是读取props和yml配置文件的类。接下来，我们分别进行读取properties和yml配置文件的具体实现。
1.读取properties配置文件
在类路径下放置一个application.properties文件，大致内容如下：
master.ds.driverClassName=com.mysql.jdbc.Driver master.ds.url=jdbc:mysql://localhost:3306/test master.ds.username=root master.ds.password=root master.ds.filters=stat master.ds.maxActive=20 master.ds.initialSize=1 master.ds.maxWait=60000 master.ds.minIdle=10 master.ds.timeBetweenEvictionRunsMillis=60000 master.ds.minEvictableIdleTimeMillis=300000 master.ds.validationQuery=SELECT'x' master.ds.testWhileIdle=true master.ds.testOnBorrow=false master.ds.testOnReturn=false master.ds.poolPreparedStatements=true master.ds.maxOpenPreparedStatements=100 master.ds.removeAbandoned=true master.ds.removeAbandonedTimeout=1800 master.ds.logAbandoned=true
读取props配置的类，很简单，基本就是一个pojo/vo类，在类上加载@ConfigurationProperties注解即可。
@ConfigurationProperties(prefix="master.ds",locations="classpath:application.properties")
publicclassPropsConfig{
privateStringdriverClassName;
privateStringurl;
privateStringusername;
privateStringpassword;
privateStringfilters;
privateStringmaxActive;
privateStringinitialSize;
privateStringmaxWait;
publicStringgetDriverClassName(){
returndriverClassName;
}
publicvoidsetDriverClassName(StringdriverClassName){
this.driverClassName=driverClassName;
}
publicStringgetUrl(){
returnurl;
}
publicvoidsetUrl(Stringurl){
this.url=url;
}
publicStringgetUsername(){
returnusername;
}
publicvoidsetUsername(Stringusername){
this.username=username;
}
publicStringgetPassword(){
returnpassword;
}
publicvoidsetPassword(Stringpassword){
this.password=password;
}
publicStringgetFilters(){
returnfilters;
}
publicvoidsetFilters(Stringfilters){
this.filters=filters;
}
publicStringgetMaxActive(){
returnmaxActive;
}
publicvoidsetMaxActive(StringmaxActive){
this.maxActive=maxActive;
}
publicStringgetInitialSize(){
returninitialSize;
}
publicvoidsetInitialSize(StringinitialSize){
this.initialSize=initialSize;
}
publicStringgetMaxWait(){
returnmaxWait;
}
publicvoidsetMaxWait(StringmaxWait){
this.maxWait=maxWait;
}
}
单元测试类
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes=ReadApplication.class)
publicclassReadApplicationPropsTests{
@Autowired
privatePropsConfigpropsConfig;
@Test
publicvoidtestDisplayPropsValue(){
StringdriverClassName=propsConfig.getDriverClassName();
Stringurl=propsConfig.getUrl();
Stringusername=propsConfig.getUsername();
Stringpassword=propsConfig.getPassword();
Stringfilters=propsConfig.getFilters();
StringmaxActive=propsConfig.getMaxActive();
StringinitialSize=propsConfig.getInitialSize();
StringmaxWait=propsConfig.getMaxWait();
System.out.println("driverClassName->"+driverClassName);
System.out.println("url->"+url);
System.out.println("username->"+username);
System.out.println("password->"+password);
System.out.println("initialSize->"+initialSize);
System.out.println("maxWait->"+maxWait);
}
}
可以看到在控制台输出的测试内容：
driverClassName->com.mysql.jdbc.Driver url->jdbc:mysql://localhost:3306/test username->root password->root initialSize->1 maxWait->60000
2.读取yml配置文件
在类路径下放置一个application.yml文件，大致内容如下：
myProps:#自定义的属性和值 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
读取yml配置文件的类。
@ConfigurationProperties(prefix="myProps")//application.yml中的myProps下的属性
publicclassYmlConfig{
privateStringsimpleProp;
privateString[]arrayProps;
privateList>listProp1=newArrayList<>();//接收prop1里面的属性值
privateListlistProp2=newArrayList<>();//接收prop2里面的属性值
privateMapmapProps=newHashMap<>();//接收prop1里面的属性值
publicStringgetSimpleProp(){
returnsimpleProp;
}
publicvoidsetSimpleProp(StringsimpleProp){
this.simpleProp=simpleProp;
}
publicList>getListProp1(){
returnlistProp1;
}
publicListgetListProp2(){
returnlistProp2;
}
publicString[]getArrayProps(){
returnarrayProps;
}
publicvoidsetArrayProps(String[]arrayProps){
this.arrayProps=arrayProps;
}
publicMapgetMapProps(){
returnmapProps;
}
publicvoidsetMapProps(MapmapProps){
this.mapProps=mapProps;
}
}
单元测试类
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes=ReadApplication.class)
publicclassReadApplicationYmlTests{
@Autowired
privateYmlConfigymlConfig;
@Test
publicvoidtestDisplayYmlValue()throwsJsonProcessingException{
System.out.println("simpleProp:"+ymlConfig.getSimpleProp());
ObjectMapperobjectMapper=newObjectMapper();
System.out.println("arrayProps:"+objectMapper.writeValueAsString(ymlConfig.getArrayProps()));
System.out.println("listProp1:"+objectMapper.writeValueAsString(ymlConfig.getListProp1()));
System.out.println("listProp2:"+objectMapper.writeValueAsString(ymlConfig.getListProp2()));
System.out.println("mapProps:"+objectMapper.writeValueAsString(ymlConfig.getMapProps()));
}
}
可以看到在控制台输出的测试内容：
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"}
是不是很神奇，不需要spring的applicationContext.xml文件也可以顺利运行之。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。
声明：本文内容来源于网络，版权归原作者所有，内容由互联网用户自发贡献自行上传，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任。如果您发现有涉嫌版权的内容，欢迎发送邮件至：czq8825#qq.com（发邮件时，请将#更换为@）进行举报，并提供相关证据，一经查实，本站将立刻删除涉嫌侵权内容。