BerkeleyDB 启动报错com.sleepycat.je.DatabaseException: The Environment directory is not writable问题

朴灿烈づ我的快乐病毒、 2023-05-31 03:10 5阅读 0赞

背景：这个是我在写一个中间件的时候发现需要用到文件存储数据方面的东西，因为自己写的达不到那个量级的需求，然后去stackoverflow上就看到了推荐 BerkeleyDB 这个文件数据库

下面是我的测试代码：

public static void main(String[] args) throws Exception {
    		EnvironmentConfig environmentConfig = new EnvironmentConfig();
    		environmentConfig.setAllowCreate(true);
    		environmentConfig.setReadOnly(false);
    		environmentConfig.setTransactional(true);
    		Environment environment = new Environment(new File("D:\\AA.txt"),environmentConfig);
    		
    		System.out.println("Env Config: " + environment.getConfig());  
    		
    	}

启动之后报错信息为

com.sleepycat.je.DatabaseException: The Environment directory is not writable, but the Environment was opened for read-write access.

这个可能国内使用的人不多吧，在国内的搜索引擎都没找到原因，想了想还是去官网文档中心找吧，地址（[https://apps.state.or.us/tech/berkeleyDB/java/com/sleepycat/db/Environment.html\#Environment(java.io.File,%20com.sleepycat.db.EnvironmentConfig][https_apps.state.or.us_tech_berkeleyDB_java_com_sleepycat_db_Environment.html_Environment_java.io.File_20com.sleepycat.db.EnvironmentConfig]）

结果看到抒写格式必须为目录，而我写的是文件，：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NTc0Mzg5_size_16_color_FFFFFF_t_70][]

把 Environment 处改成目录就行了，如下代码：

public static void main(String[] args) throws Exception {
    		EnvironmentConfig environmentConfig = new EnvironmentConfig();
    		environmentConfig.setAllowCreate(true);
    		environmentConfig.setReadOnly(false);
    		environmentConfig.setTransactional(true);
    		Environment environment = new Environment(new File("D:\\B_02_BerkeleyDB"),environmentConfig);
    		
    		System.out.println("Env Config: " + environment.getConfig());  
    		
    		  
    	}

[https_apps.state.or.us_tech_berkeleyDB_java_com_sleepycat_db_Environment.html_Environment_java.io.File_20com.sleepycat.db.EnvironmentConfig]: https://apps.state.or.us/tech/berkeleyDB/java/com/sleepycat/db/Environment.html#Environment%28java.io.File,%20com.sleepycat.db.EnvironmentConfig%29
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NTc0Mzg5_size_16_color_FFFFFF_t_70]: /images/20230531/58b952dff6194891bb04f7467c3a56d2.png