xml配置
<bean id="hashService" class="org.apache.shiro.crypto.hash.DefaultHashService">
<property name="hashAlgorithmName" value="MD5"></property>
<property name="hashIterations" value="3"></property>
<property name="generatePublicSalt" value="true"></property>
</bean>
<bean id="passwordService" class="org.apache.shiro.authc.credential.DefaultPasswordService">
<property name="hashService" ref="hashService"></property>
</bean>
<bean id="credentialsMatcher" class="org.apache.shiro.authc.credential.PasswordMatcher">
<property name="passwordService" ref="passwordService"></property>
</bean>
<!-- 自定义Realm -->
<bean id="myRealm" class="org.apache.shiro.realm.jdbc.JdbcRealm">
<property name="authenticationQuery" value="select password from users where username = ?"></property>
<property name="userRolesQuery" value="SELECT r.role_name FROM roles r INNER JOIN users u ON u.username=? INNER JOIN users_roles ur ON ur.u_id=u.id AND ur.r_id=r.id"></property>
<property name="permissionsQuery" value="SELECT p.permission FROM roles r INNER JOIN permissions p , roles_permissions rp WHERE p.id=rp.p_id AND r.id=r_id AND r.role_name=?"></property>
<property name="permissionsLookupEnabled" value="true"></property>
<property name="dataSource" ref="dataSource"></property>
<property name="credentialsMatcher" ref="credentialsMatcher"></property>
</bean>
PasswordMatcher cm = (PasswordMatcher) myRealm.getCredentialsMatcher();
String encPassword = cm.getPasswordService().encryptPassword(user.getPassword());
