Java实现读取项目中文件(.json或.properties)的方法详解
短信预约 -IT技能 免费直播动态提醒
1. 读取json file
1.1 Json dependency
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.76</version>
</dependency>
1.2 字节流
重点部分
- . /代表同级目录
- …/ 代表上级目录(两个点)
- / 代表根目录
public class FileService {
public JSONObject reader(){
JSONObject resultJson = null;
String file = "class="lazy" data-src/main/resources/config_dev.json";
InputStream is = null;
try {
is = new FileInputStream(file);//操作
byte[] bytes = new byte[5000];//数组容量超级大，一次能将中英混合文本全部读取完
int len = -1;
while ((len = is.read(bytes)) != -1) {
String str = new String(bytes, 0, len, "UTF-8");
resultJson = process(str);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {//释放资源
try {
if (null != is) {
is.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return resultJson;
}
private static JSONObject process(String content) {
JSONObject json = JSONObject.parseObject(content);
return json;
}
}
1.3 buffer reader
public static String reader(String filePath) {
try {
File file = new File(filePath);
if (file.isFile() && file.exists()) {
InputStreamReader read = new InputStreamReader(new FileInputStream(file), "UTF-8");
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = bufferedReader.readLine();
while (lineTxt != null) {
return lineTxt;
}
}
} catch (UnsupportedEncodingException | FileNotFoundException e) {
System.out.println("Cannot find the file specified!");
e.printStackTrace();
} catch (IOException e) {
System.out.println("Error reading file content!");
e.printStackTrace();
}
return null;
}
2. 读取properties file
public void readPropertiesFile() {
Properties pro = new Properties();
InputStream is = this.getClass().getResourceAsStream("/application.properties");
try {
pro.load(is);
Enumeration en = pro.propertyNames();
while (en.hasMoreElements()) {
String key = (String) en.nextElement();
String value = pro.getProperty(key);
System.out.println(key + "--" + value);
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
3. 好看的css样式
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<link rel="stylesheet" href="https://qxhut.cn/zb_users/plugin/Jz52_click/click.css">
<script class="lazy" data-src="https://qxhut.cn/zb_users/plugin/Jz52_click/click.js"></script>
<h1>Click Style</h1>
</body>
</html>到此这篇关于Java实现读取项目中文件(.json或.properties)的方法详解的文章就介绍到这了,更多相关Java读取项目文件内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网！
免责声明：
① 本站未注明“稿件来源”的信息均来自网络整理。其文字、图片和音视频稿件的所属权归原作者所有。本站收集整理出于非商业性的教育和科研之目的，并不意味着本站赞同其观点或证实其内容的真实性。仅作为临时的测试数据，供内部测试之用。本站并未授权任何人以任何方式主动获取本站任何信息。
② 本站未注明“稿件来源”的临时测试数据将在测试完成后最终做删除处理。有问题或投稿请发送至: 邮箱/279061341@qq.com QQ/279061341
