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spring-ldap提供了类似于spring jdbc模板的方法访问ldap。比之jdk中的方法会简单不少。
首先，新建java project，加入spring、spring-ldap及其它相关库。新建包com.yang.ldap.demo。为简单起见，所有类及配置文件都放在此处。新建类UserDaoLdapImpl（其它实现与此无关，进而接口在此处也去掉了）。内容如下：
package com.yang.ldap.demo;
import java.util.List;
import javax.naming.NamingException;
import javax.naming.directory.Attributes;
import org.springframework.ldap.AttributesMapper;
import org.springframework.ldap.LdapTemplate;
/**
* @author yangbagang
*
*/
public class UserDaoLdapImpl {
private LdapTemplate ldapTemplate;
public void setLdapTemplate(LdapTemplate ldapTemplate) {
this.ldapTemplate = ldapTemplate;
}
public List getAllPersonNames() {
return ldapTemplate.search(
"","(objectclass=person)",
new AttributesMapper() {
public Object mapFromAttributes(Attributes attrs) throws NamingException {
return attrs.get("cn").get();
}
});
}
public List getAllPersons() {
return ldapTemplate.search(
"", "(objectclass=person)", new PersonAttributesMapper());
}
public Person getPersonByDn(String dn) {
return (Person)ldapTemplate.lookup(dn, new PersonAttributesMapper());
}
private class PersonAttributesMapper implements AttributesMapper {
public Object mapFromAttributes(Attributes attrs) throws NamingException {
Person person = new Person();
person.setCn((String) attrs.get("cn").get());
person.setSn((String) attrs.get("sn").get());
return person;
}
}
}
此处对Person也进行了简化。内容如下：
package com.yang.ldap.demo;
/**
* @author yangbagang
*
*/
public class Person {
private String cn;
private String sn;
public String getCn() {
return cn;
}
public void setCn(String cn) {
this.cn = cn;
}
public String getSn() {
return sn;
}
public void setSn(String sn) {
this.sn = sn;
}
}
新建spring配置文件applicationContext.xml，内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="ldapSource" class="org.springframework.ldap.support.LdapContextSource">
<property name="url" value="ldap://localhost:389" />
<property name="base" value="dc=yang,dc=com" />
<property name="userName" value="cn=root,dc=yang,dc=com" />
<property name="password" value="secret" />
</bean>
<bean id="ldapTemplate" class="org.springframework.ldap.LdapTemplate">
<constructor-arg ref="ldapSource" />
</bean>
<bean id="userDao" class="com.yang.ldap.demo.UserDaoLdapImpl">
<property name="ldapTemplate"><ref bean="ldapTemplate"/></property>
</bean>
</beans>
开发所用ldap为openldap for windows，不要尝试用此用户名与密码连接我的ldap啊，呵呵。
没有测试的方法，就等于不存在。下面写测试类TestUserDao。
package com.yang.ldap.demo;
import java.util.List;
import org.springframework.test.AbstractDependencyInjectionSpringContextTests;
/**
* @author yangbagang
*
*/
public class TestUserDao extends AbstractDependencyInjectionSpringContextTests {
private UserDaoLdapImpl dao;
public void setDao(UserDaoLdapImpl dao) {
this.dao = dao;
}
public void testGetAllPersonNames() {
List list = dao.getAllPersonNames();
assertTrue(list.size() > 0);
}
public void testGetAllPersons() {
List list = dao.getAllPersons();
assertTrue(list.size() > 0);
}
public void testGetPersonByDn() {
String dn = "cn=zhangsan,ou=sales,o=users";
String name = "张三";
Person person = dao.getPersonByDn(dn);
assertTrue(name.equals(person.getSn()));
}
/* (non-Javadoc)
* @see org.springframework.test.AbstractDependencyInjectionSpringContextTests#getConfigLocations()
*/
@Override
protected String[] getConfigLocations() {
return new String[]{"classpath:/com/yang/ldap/demo/applicationContext.xml"};
}
}
运行之后可以看到junit的green bar。
附：如果出错，请先检查一下是否使用了你自己的实际信息替代（如用户名、密码、测试的dn等），另外提高openldap的debug级别也是有效的方法。
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