spring项目读取配置的demo

背景

读取配置是基础能力，研发这个模式不错，可以从不同配置中读取数据，如下图：



可以根据不同分类的文件来管理配置，然后统一在conf中配置哪些文件

package com.jwen.platform.config;import com.jwen.platform.exception.AppConfigurationException;import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;public enum Configurations {
INSTANCE; private final static String KEY_VALUE_SEPARATOR = "=";
private final static String CONFIGURATION_FILE = "application.conf";
private final static String OTHER_CONFIGURATION_FILE_KEY = "app_include_file"; private List<String> otherConfigurationFiles = new ArrayList<>();
private Map<String, String> configurations = new HashMap<>(); Configurations() {
try {
init();
} catch (IOException | URISyntaxException e) {
throw new AppConfigurationException("has error in your application.conf", e);
}
} private void init() throws IOException, URISyntaxException { InputStream resourceAsStream = this.getClass().getClassLoader().getResourceAsStream(CONFIGURATION_FILE);
BufferedReader br = new BufferedReader(new InputStreamReader(resourceAsStream)); String s = "";
List<String> lines = new ArrayList<String>(); while ((s = br.readLine()) != null) {
lines.add(s);
} // 关闭流
resourceAsStream.close();
br.close(); initConfigurations(lines);
initOtherConfigurations(); } private void initOtherConfigurations() throws URISyntaxException, IOException {
for (String fileName : otherConfigurationFiles) {
InputStream resourceAsStream = this.getClass().getClassLoader().getResourceAsStream(fileName);
BufferedReader br = new BufferedReader(new InputStreamReader(resourceAsStream)); String s = "";
List<String> lines = new ArrayList<String>(); while ((s = br.readLine()) != null) {
lines.add(s);
} // 关闭流
resourceAsStream.close();
br.close(); initConfigurations(lines);
} otherConfigurationFiles = null;
} private boolean isOtherConfigurationKey(String key) {
return OTHER_CONFIGURATION_FILE_KEY.equalsIgnoreCase(key);
} private void initConfigurations(List<String> lines) throws URISyntaxException, IOException {
lines.stream().forEach(line -> {
int keyValueSeparatorIndex = line.indexOf(KEY_VALUE_SEPARATOR);
if (isLegalConfigurationLine(line)) {
String key = line.substring(0, keyValueSeparatorIndex).trim();
String value = line.substring(keyValueSeparatorIndex + 1, line.length()).trim();
if (isOtherConfigurationKey(key)) {
otherConfigurationFiles.add(value);
} else {
configurations.put(key, value);
}
}
});
} private boolean isLegalConfigurationLine(String line) {
Pattern pattern = Pattern.compile("^[a-zA-Z](.*?)=(.*?)");
return pattern.matcher(line).matches();
} public String get(String key) {
return configurations.get(key);
} public static void main(String[] args) { System.out.println(Configurations.INSTANCE.get("test.on"));
}
}