方法总结

1. 加载配置文件

public static String getConfig(String fileName) {

        StringBuilder sb = new StringBuilder();
        
        InputStream in = null;
        try {
            
            // 获取当前jar包所在路径
            String path = ConfigLoader.class.getProtectionDomain().getCodeSource().getLocation().toString();
            int begin = path.indexOf(":")+1;
            int end = path.lastIndexOf("/")+1;
            String userDir = path.substring(begin,end);
            
            File confInDir = new File(userDir + File.separator + fileName);
            URL confInClassPath = ConfigLoader.class.getResource("/" + fileName);
            
            // 普通配置文件获取
            if(confInDir.exists()){
                System.out.println("Load Config File:"+confInDir);
                in = new FileInputStream(confInDir);
                BufferedReader reader = new BufferedReader(new InputStreamReader(in,"UTF-8"));
                String line = null;
                while((line=reader.readLine())!=null){
                    sb.append(line).append('\n');
                }
                reader.close();
            }else if(null != confInClassPath){
                // web 服务配置文件获取class目录下
                in = ConfigLoader.class.getResourceAsStream("/" + fileName);
                BufferedReader reader = new BufferedReader(new InputStreamReader(in,"UTF-8"));
                String line = null;
                while((line=reader.readLine())!=null){
                    sb.append(line).append('\n');
                }
                reader.close();
            }
            
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if(null != in){
                try {
                    in.close();
                } catch (IOException e) {
                }
            }
        }
        return sb.toString();
    }