SpringSecurity学习2

从数据库或者其他数据源加载用户数据

1.ApplicationContext.xml配置，根据密码是加密过和使用salt的，则在<authentication-provider>中需要配置<password-encoder>和<salt-source>

<beans:property name="userPropertyToUse" value="salt" /> salt在UserDetail获取getSalt()方法的返回值

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/security"
	xmlns:beans="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                        http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.0.xsd 
                        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	<http use-expressions="true">
	    <intercept-url pattern="/login.html" filters="none"/>
	    <intercept-url pattern="/loginfail.html" filters="none"/>
		<intercept-url pattern="/loginsucc.html" access="hasAnyRole('user')" />
		<intercept-url pattern="/resource.html" access="hasAnyRole('admin')" />
		
		<form-login login-page="/login.html" login-processing-url="/login.shtml" 
		    default-target-url="/loginsucc.html" authentication-failure-url="/loginfail.html"/>
		    
		<!-- 配置退出页面 -->
		<logout logout-url="/logout.shtml" logout-success-url="/login.html" />
		<anonymous enabled="false"/>
	</http>
	
	<authentication-manager>
		<authentication-provider user-service-ref="userService">
		    <password-encoder ref="encoder">
		        <salt-source ref="saltSource"/>
		    </password-encoder>
		</authentication-provider>
	</authentication-manager>
    
    <beans:bean id="encoder"
		class="org.springframework.security.authentication.encoding.Md5PasswordEncoder" />
	<beans:bean id="saltSource"
		class="org.springframework.security.authentication.dao.ReflectionSaltSource">
		<beans:property name="userPropertyToUse" value="salt" />
	</beans:bean>   

    <beans:bean id="userService" class="lan.service.impl.UserServiceImpl">
        <beans:property name="encoder" ref="encoder"/>
        <beans:property name="saltSource" ref="saltSource" />
    </beans:bean>
</beans:beans>

2.实现UserDetailService

package lan.service.impl;

import lan.model.User;
import lan.service.UserService;

import org.springframework.dao.DataAccessException;
import org.springframework.security.authentication.dao.SaltSource;
import org.springframework.security.authentication.encoding.PasswordEncoder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;

public class UserServiceImpl implements UserService, UserDetailsService {
    
    //用于给密码加密
    private PasswordEncoder encoder;
    private SaltSource saltSource;

    public void setEncoder(PasswordEncoder encoder) {
        this.encoder = encoder;
    }

    public void setSaltSource(SaltSource saltSource) {
        this.saltSource = saltSource;
    }
    
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException, DataAccessException {
        //在此处加载用户信息，比如根据用户名从数据库获取用户密码，角色等信息
        return user;  //该出返回的user是UserDetail的一个实现
    }

}

 3.认证主体必须实现UserDetail

package lan.model;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

public class User implements UserDetails {
    
    private static final long serialVersionUID = -7107484257288140958L;
    private String companyname;
    private String username; //lan
    private String password = "3fdf39fe84f3ac372f41fecb1c51299b"; //原始密码为：111111
    private Set<Role> roles = new HashSet<Role>();

    public User(){}
    
    public User(String username) {
        super();
        this.username = username;
    }

    public Set<Role> getRoles() {
        return roles;
    }

    public void setRoles(Set<Role> roles) {
        this.roles = roles;
    }

    public String getCompanyname() {
        return "lan";
    }

    public void setCompanyname(String companyname) {
        this.companyname = companyname;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public Collection<GrantedAuthority> getAuthorities() {
        Role role = new Role();
        role.setName("user");
        Collection<GrantedAuthority> roles = new ArrayList<GrantedAuthority>();
        roles.add(role);
        return roles;
    }

    @Override
    public String getPassword() {
        return password;
    }

    @Override
    public String getUsername() {
        return username;
    }

    @Override
    public boolean isAccountNonExpired() {
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }

    @Override
    public boolean isEnabled() {
        return true;
    }

    public Object getSalt(){
        return username;
    }

    @Override
    public String toString() {
        return "User [companyname=" + companyname + ", username=" + username + ", password=" + password + "]";
    }
    
}

package lan.model;

import org.springframework.security.core.GrantedAuthority;

 public class Role implements GrantedAuthority {

    private static final long serialVersionUID = -2431947985974407523L;
    private String name;
    
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String getAuthority() {
        return name;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Role other = (Role) obj;
        if (name == null) {
            if (other.name != null)
                return false;
        } else if (!name.equals(other.name))
            return false;
        return true;
    }

}