SpringBoot项目实战：四种读取properties文件的方式
这里说了四种方式可以把配置文件放到外部的。
第一种是在jar包的同一目录下建一个config文件夹，然后把配置文件放到这个文件夹下；
第二种是直接把配置文件放到jar包的同级目录；
第三种在classpath下建一个config文件夹，然后把配置文件放进去；
第四种是在classpath下直接放配置文件。
这四种方式的优先级是从一到四一次降低的。
注：前三种测试配置文件为springboot默认的application.properties文件
#######################方式一 有多种数据类型，其他方式不支持list 等类型#########################
com.zyd.type3=Springboot - @ConfigurationProperties
com.zyd.title3=使用@ConfigurationProperties获取配置文件
#map
com.zyd.login[username]=zhangdeshuai
com.zyd.login[password]=zhenshuai
com.zyd.login[callback]=http://www.flyat.cc
#list
com.zyd.urls[0]=http://ztool.cc
com.zyd.urls[1]=http://ztool.cc/format/js
com.zyd.urls[2]=http://ztool.cc/str2image
com.zyd.urls[3]=http://ztool.cc/json2Entity
com.zyd.urls[4]=http://ztool.cc/ua
#######################方式二#########################
com.zyd.type=Springboot - @Value
com.zyd.title=使用@Value获取配置文件
#######################方式三#########################
com.zyd.type2=Springboot - Environment
com.zyd.title2=使用Environment获取配置文件
一、@ConfigurationProperties方式
@Component
@ConfigurationProperties(prefix = "com.zyd")
// PropertySource默认取application.properties ，包括不同环境自动取对应的application-dev.properties 或者application-pro.properties 对yml也可以， 但是指定配置文件的话对yml 不支持
// @PropertySource(value = "config.properties")
public class PropertiesConfig {
public String type3;
public String title3;
public Map
public List
public String getType3() { return type3; }
public void setType3(String type3) { this.type3 = type3; }
public String getTitle3() {
try {
return new String(title3.getBytes("ISO-8859-1"), "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return title3;
}
public void setTitle3(String title3) { this.title3 = title3; }
public Map
public void setLogin(Map
public List
public void setUrls(List
}
二、使用@Value注解方式
@RestController
public class ConfigController {
@Value("${com.zyd.type}")
private String type;
@Value("${com.zyd.title}")
private String title;
@RequestMapping("/value")
public Map
Map
map.put("type", type);
map.put("title", new String(title.getBytes("ISO-8859-1"), "UTF-8"));
return map;
}
}
或者
@Component
指定外部配置文件：
@PropertySource({"classpath:config/my.properties","classpath:config/config.properties"})
或者
@PropertySource({"file:d:/config/my.properties","file:d:/config/config.properties"})
@Value("${com.zyd.type}")
private String type;
@Value("${com.zyd.title}")
private String title;
get/set 方法
}
在controller 或者server 类中，使用
@Autowired
private ConfigProperty configProperty;
在方法中：
configProperty.getType() 获取
三、使用Environment
public class xxController {
@Autowired
private Environment env;
@RequestMapping("/env")
public Map
Map
map.put("type", env.getProperty("com.zyd.type2"));
map.put("title", new String(env.getProperty("com.zyd.title2").getBytes("ISO-8859-1"), "UTF-8"));
return map;
}
}
四、使用PropertiesLoaderUtils
其实本人写了 PropertiesUtils ，调用外部的proerty 文件。代码如下：
@Component
public class PropertiesUtils {
private static final Logger log = LoggerFactory.getLogger(PropertiesUtils.class);
private static String profilepath = "/xxxxxx-#.properties";
private static Properties props = new Properties();
private static String env = System.getProperty("spring.profiles.active","pro");
public PropertiesUtils() {
profilepath = profilepath.replace("#",env);
log.info("-----------profilepath:{}", profilepath);
InputStream is = null;
try {
if(env.equals("dev")){
is = this.getClass().getResourceAsStream(profilepath);
}else{
String filePath = System.getProperty("user.dir")+profilepath;
is = new BufferedInputStream(new FileInputStream(filePath));
}
props.load(is);
} catch (Exception e) {
log.error("PropertiesUtils--", e);
return;
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
log.error("PropertiesUtils-close-", e);
}
}
}
}
public String getKeyValue(String key) {
return props.getProperty(key);
}
/**
*
* @param keyname
* @param keyvalue
* @param isAppend ：是否追加
*/
public void writeProperties(String keyname, String keyvalue,boolean isAppend) {
OutputStream fos = null;
try {
String path = "";
if(env.equals("dev")){
path = this.getClass().getResource(profilepath).getPath();
}else{
path = System.getProperty("user.dir")+profilepath;
}
log.info("-writeProperties-path:{}",path);
File file = new File(path);
if(file.exists()){
log.info("exist:" + file.getAbsolutePath());
}else{
log.info("{} not exist", path);
}
fos = new FileOutputStream(file);
if(isAppend){
String v = props.get(keyname).toString();
keyvalue =v+","+keyvalue;
}
props.setProperty(keyname, keyvalue);
props.store(fos, "Update '" + keyname + "' value");
} catch (IOException e) {
log.error("writeProperties:",e);
} finally {
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
log.error("writeProperties:",e);
}
}
}
}
public void removeProperties(String keyname) {
OutputStream fos = null;
Properties properties = new Properties();
try {
String path = "";
if(env.equals("dev")){
path = this.getClass().getResource(profilepath).getPath();
}else{
path = System.getProperty("user.dir")+profilepath;
}
File file = new File(path);
if(file.exists()){
log.info("exist:" + file.getAbsolutePath());
}else{
log.info("{} not exist", path);
}
fos = new FileOutputStream(file);
Enumeration enumeration = props.propertyNames();
while(enumeration.hasMoreElements() ){
String key = (String)enumeration.nextElement();
if(key.equals(keyname)){
continue;
}
properties.setProperty(key,props.getProperty(keyname));
}
properties.store(fos, "Update '" + keyname + "' value");
writeProperties(keyname,"",false);
} catch (IOException e) {
log.error("writeProperties:",e);
} finally {
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
当然贴出PropertiesLoaderUtils方法：
app-config.properties
#### 通过注册监听器(`Listeners`) + `PropertiesLoaderUtils`的方式
com.zyd.type=Springboot - Listeners
com.zyd.title=使用Listeners + PropertiesLoaderUtils获取配置文件
com.zyd.name=zyd
com.zyd.address=Beijing
com.zyd.company=in
PropertiesListener.java 用来初始化加载配置文件
public class PropertiesListener implements ApplicationListener
private String propertyFileName;
public PropertiesListener(String propertyFileName) {
this.propertyFileName = propertyFileName;
}
@Override
public void onApplicationEvent(ApplicationStartedEvent event) {
PropertiesListenerConfig.loadAllProperties(propertyFileName);
}
}
public class PropertiesListenerConfig {
public static Map
private static void processProperties(Properties props) throws BeansException {
propertiesMap = new HashMap
for (Object key : props.keySet()) {
String keyStr = key.toString();
try {
// PropertiesLoaderUtils的默认编码是ISO-8859-1,在这里转码一下
propertiesMap.put(keyStr, new String(props.getProperty(keyStr).getBytes("ISO-8859-1"), "utf-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (java.lang.Exception e) {
e.printStackTrace();
}
}
}
public static void loadAllProperties(String propertyFileName) {
try {
Properties properties = PropertiesLoaderUtils.loadAllProperties(propertyFileName);
processProperties(properties);
} catch (IOException e) {
e.printStackTrace();
}
}
public static String getProperty(String name) {
return propertiesMap.get(name).toString();
}
public static Map
return propertiesMap;
}
}
@SpringBootApplication
@RestController
public class Applaction {
@RequestMapping("/listener")
public Map
Map
map.putAll(PropertiesListenerConfig.getAllProperty());
return map;
}
public static void main(String[] args) throws Exception {
SpringApplication application = new SpringApplication(Applaction.class);
// 第四种方式：注册监听器
application.addListeners(new PropertiesListener("app-config.properties"));
application.run(args);
}
}