我试图通过设置最基本的工作程序来弄清楚 Spring LDAP(不是 Spring 安全性东西)是如何工作的，但似乎实际的身份验证中断了。

这是我得到的错误:

Exception in thread "main" java.lang.NullPointerException
    at org.springframework.ldap.core.support.AbstractContextSource.getReadOnlyContext(AbstractContextSource.java:125)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:287)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:237)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:588)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:546)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:401)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:421)
    at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:441)

The code that's executed in the method that's throwing the exception is:

return getContext(authenticationSource.getPrincipal(),
                  authenticationSource.getCredentials());

看来我需要在应用程序上下文中设置身份验证源？我真的迷路了。

这是我的代码:

package se.test.connector.ldap;

import java.util.List;
import javax.naming.NamingException;
import javax.naming.directory.Attributes;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.ldap.core.AttributesMapper;
import org.springframework.ldap.core.DistinguishedName;
import org.springframework.ldap.core.LdapTemplate;
import org.springframework.ldap.core.support.LdapContextSource;
import org.springframework.ldap.filter.EqualsFilter;

public class LdapTest {

    public static void main(String[] args) {
        LdapContextSource ctxSrc = new LdapContextSource();
        ctxSrc.setUrl("ldap://<ldapUrl>:389");
        ctxSrc.setBase("DC=bar,DC=test,DC=foo");
        ctxSrc.setUserDn("<username>@bar.test.foo");
        ctxSrc.setPassword("<password>");

        LdapTemplate tmpl = new LdapTemplate(ctxSrc);

        PersonDao dao = new PersonDao(tmpl);
        dao.getAllPersonNames();
    }

    public static class PersonDao {

        private LdapTemplate ldapTemplate;

        public PersonDao(LdapTemplate ldapTemplate) {
            this.ldapTemplate = ldapTemplate;
        }

        public void setLdapTemplate(LdapTemplate ldapTemplate) {
            this.ldapTemplate = ldapTemplate;
        }

        public List getAllPersonNames() {
            EqualsFilter filter = new EqualsFilter("objectclass", "person");
            return ldapTemplate.search(DistinguishedName.EMPTY_PATH,
                    filter.encode(),
                    new AttributesMapper() {

                        public Object mapFromAttributes(Attributes attrs) throws NamingException {
                            return attrs.get("cn").get();
                        }
                    });
        }
    }
}

最佳答案

我有一个非常相似的问题 - 也有 NullPointerException。

解决我问题的方法是调用 afterPropertiesSet() :

// ...

LdapContextSource ctxSrc = new LdapContextSource();
ctxSrc.setUrl("ldap://<ldapUrl>:389");
ctxSrc.setBase("DC=bar,DC=test,DC=foo");
ctxSrc.setUserDn("<username>@bar.test.foo");
ctxSrc.setPassword("<password>");

ctxSrc.afterPropertiesSet(); /* ! */

LdapTemplate tmpl = new LdapTemplate(ctxSrc);

// ...

关于java - Spring LDAP 基本用法，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12297044/