java 获取 classpath下的配置文件

一 获取 prop属性文件：

1/**
2 * 读取属性文件
3 * Created by lg on 2017/2/3.
4 */
5public class LoadPropertiesFile {
6
7    public static Map<String,String> loadPropFile(String filePath) {
8
9        Map<String, String> map = new HashMap<String,String>();
10
11        // 获取资源文件
12        InputStream is = LoadPropertiesFile.class.getClassLoader().getResourceAsStream(filePath);
13        //属性列表
14        Properties prop = new Properties();
15
16        try {
17            prop.load(is);
18
19        } catch (IOException e) {
20            e.printStackTrace();
21        }
22        Set<Map.Entry<Object, Object>> set = prop.entrySet();
23        Iterator<Map.Entry<Object, Object>> iterator = set.iterator();
24        String key = null;
25        String value = null;
26        while (iterator.hasNext()) {
27            Map.Entry<Object, Object> entry = iterator.next();
28            key = String.valueOf(entry.getKey());
29            value = String.valueOf(entry.getValue());
30            //对取出的值进行非空处理
31            key = key == null? null :key.trim().toUpperCase();
32            value = value == null? null :value.trim().toUpperCase();
33            map.put(key, value);
34        }
35        return map;
36    }
37}

二 获取普通文件

URL url = YourClass.class.getClassLoader().getResource("extObj.txt"); File file = new File(url.getFile());

三 获取文件输入流

InputStream in = YourClass.class.getClassLoader().getResourceAsStream(fileName);