How to configure the jdbcrealm data source?

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How to configure JdbcRealm Data sources ？

The following author describes the configuration JdbcRealm Method sharing of data sources , As shown below :

IniRealm It is the data source of the configuration database   Usually : stay ini Data related information is set in the file  

example ：

 establish user.ini
//shiro-jdbc.ini To configure 
jdbcRealm=org.apache.shiro.realm.jdbc.JdbcRealm
dataSource=com.alibaba.druid.pool.DruidDataSource
dataSource.driverClassName=com.mysql.jdbc.Driver
dataSource.url=jdbc:mysql://localhost:3306/shiro
dataSource.username=root
dataSource.password=123456
jdbcRealm.dataSource=$dataSource
securityManager.realms=$jdbcRealm
mysql Build table 
//mysql sentence 
drop database if exists shiro;
create database shiro;
use shiro;

create table users (
  id bigint auto_increment,
  username varchar(100),
  password varchar(100),
  password_salt varchar(100),
  constraint pk_users primary key(id)
) charset=utf8 ENGINE=InnoDB;
create unique index idx_users_username on users(username);

create table user_roles(
  id bigint auto_increment,
  username varchar(100),
  role_name varchar(100),
  constraint pk_user_roles primary key(id)
) charset=utf8 ENGINE=InnoDB;
create unique index idx_user_roles on user_roles(username, role_name);

create table roles_permissions(
  id bigint auto_increment,
  role_name varchar(100),
  permission varchar(100),
  constraint pk_roles_permissions primary key(id)
) charset=utf8 ENGINE=InnoDB;
create unique index idx_roles_permissions on roles_permissions(role_name, permission);

insert into users(username,password)values('zhang','123');
securityManager User authentication 
//test.java
@Test
public void testShiroJdbcRealm(){
	//1. obtain securityManager And instantiate 
	IniSecurityManagerFactory factory = new IniSecurityManagerFactory("classpath:shiro-jdbc.ini");
	SecurityManager securityManager = factory.getInstance();
	//2. Bind to SecurityUtils
	SecurityUtils.setSecurityManager(securityManager);
	//3. obtain subject And user authentication token
	Subject subject = SecurityUtils.getSubject();
	UsernamePasswordToken token = new UsernamePasswordToken("zhang","123");
	try{
		subject.login(token);
	}catch (AuthenticationException e){

	}
	Boolean b = subject.isAuthenticated();
	subject.logout();
}
 It uses jdbcrealm The default table and query language , If you need to customize the table , Custom query statement , You can refer to the following code .

JdbcRealm Customize 
public class JdbcRealmTest {
    private static DruidDataSource dataSource;
    static {
        dataSource = new DruidDataSource();
        dataSource.setUrl("jdbc:mysql://127.0.0.1:3306/shiro");
        dataSource.setUsername("root");
        dataSource.setPassword("root");
    }
    @Test
    public void testJdbcRealm(){
        //1、 initialization JdbcRealm
        JdbcRealm jdbcRealm = new JdbcRealm();
        jdbcRealm.setDataSource(dataSource);
        /**
         *  a key ：JdbcRealm Permission check is not enabled by default , To judge whether a role has certain permissions , This setting needs to be turned on , Otherwise, the permission table cannot be checked ,
         *  As a result, the queried permission is empty .
         */
        jdbcRealm.setPermissionsLookupEnabled(true);

        //（1） Custom query password （ If you don't customize ,JdbcRealm There are default query statements ）
        String authenticationQuery = "select password from users where username = ?";
        jdbcRealm.setAuthenticationQuery(authenticationQuery);
        //（2） Custom query role （ If you don't customize ,JdbcRealm There are default query statements ）
        String userRolesQuery = "select role_name from user_roles where username = ?";
        jdbcRealm.setUserRolesQuery(userRolesQuery);
        //（3） Customize query permissions （ If you don't customize ,JdbcRealm There are default query statements ）
        String permissionsQuery = "select permission from roles_permissions where role_name = ?";
        jdbcRealm.setPermissionsQuery(permissionsQuery);

        //2、 establish SecurityManager
        DefaultSecurityManager securityManager = new DefaultSecurityManager();

        //3、 Set data source 
        securityManager.setRealm(jdbcRealm);

        SecurityUtils.setSecurityManager(securityManager);

        Subject subject = SecurityUtils.getSubject();

        AuthenticationToken token = new UsernamePasswordToken("root", "root");
        subject.login(token);

        System.out.println(subject.isAuthenticated());

        subject.checkRole("admin");
        subject.checkPermission("user:delete");
    }
}