Java 错误：需要在环境或系统属性 LDAP 和 JNDI 中指定类名
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ERROR: Need to specify class name in environment or system property LDAP and JNDI
提问by user840718
This is my code:
这是我的代码：
public class TestConnection {
public static void main(String[] args) {
String password = "s3cret";
Map<String, String> env = new HashMap<String, String>();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://localhost:389/dc=userdev,dc=local");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
//env.put(Context.SECURITY_PRINCIPAL, "uid="+ username +"cn=users"); // replace with user DN
env.put(Context.SECURITY_PRINCIPAL, "cn=dcmanager,cn=users,dc=userdev,dc=local"); // replace with user DN
env.put(Context.SECURITY_CREDENTIALS, password);
DirContext ctx = null;
try {
ctx = new InitialDirContext();
} catch (NamingException e) {
// handle
}
try {
SearchControls controls = new SearchControls();
controls.setSearchScope( SearchControls.SUBTREE_SCOPE);
ctx.search( "", "(objectclass=person)", controls);
// no need to process the results
} catch (NameNotFoundException e) {
e.printStackTrace();
System.out.println("catch 1");
// The base context was not found.
// Just clean up and exit.
} catch (NamingException e) {
System.out.println("catch 2");
e.printStackTrace();
// exception handling
} finally {
// close ctx or do Java 7 try-with-resources http://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html
}
}
}
I got this error (catch 2) : javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
我收到此错误（捕获 2）： javax.naming.NoInitialContextException：需要在环境或系统属性中指定类名，或作为小程序参数，或在应用程序资源文件中：java.naming.factory.initial
I have looked for a lot of solutions, but I don't get the error. Where is the problem? Maybe the context, but I think that the code is perfectly correct.
我已经寻找了很多解决方案，但我没有收到错误消息。问题出在哪儿？也许是上下文，但我认为代码是完全正确的。
采纳答案by Priyesh
You have to construct the InitialDirContextobject using the envmap you have populated. i.e. use the following code to construct it;
您必须使用已填充的env映射构造InitialDirContext对象。即使用以下代码来构造它；
ctx = new InitialDirContext(env);
ctx = new InitialDirContext(env);
回答by thomson
This should be ctx = new InitialDirContext(env, null);, with env being a hashtable.
这应该是ctx = new InitialDirContext(env, null);， env 是一个哈希表。
回答by Neelam Chahal
For JBOSS AS
create initialContext
创建初始上下文
public static final String PKG_INTERFACE="org.jboss.ejb.client.naming";
public static Context initialContext;
public static Context getInitialContext() throws NamingException{
if(initialContext==null){
Properties properties=new Properties();
properties.put(Context.URL_PKG_PREFIXES, PKG_INTERFACE);
initialContext=new InitialContext(properties);
}
public static final String PKG_INTERFACE="org.jboss.ejb.client.naming";
check you are passing correct Sring i.e. "org.jboss.ejb.client.naming" in PKG_INTERFACE .
create a file jboss-ejb-client.properties put it in the root of ejbModule and add ejbModule folder to classpath. contents for jboss-ejb-client.properties
创建一个文件 jboss-ejb-client.properties 把它放在 ejbModule 的根目录中，并将 ejbModule 文件夹添加到类路径中。jboss-ejb-client.properties 的内容
remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=false
remote.connections=default
remote.connection.default.host=localhost
remote.connection.default.port = 4447
remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false
