（转）SpringSecurity扩展User类，获取Session

1.在session中取得spring security的登录用户名如下

${session.SPRING_SECURITY_CONTEXT.authentication.principal.username}

spring security 把SPRING_SECURITY_CONTEXT 放入了session 没有直接把username 放进去。

下面一段代码主要描述的是session中的存的变量

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存跳转时候的URL

session {SPRING_SECURITY_SAVED_REQUEST_KEY=SavedRequest[http://localhost:8080/AVerPortal/resourceAction/resourceIndex.action]}

存的是登录成功时候session中存的信息

session {SPRING_SECURITY_CONTEXT=org.springframework.security.context.SecurityContextImpl@87b16984: Authentication: org.springframework.security.providers.cas.CasAuthenticationToken@87b16984: Principal: com.avi.casExtends.UserInfo@ff631d80: Username: test; Password: [PROTECTED]; Enabled: true; AccountNonExpired: true; credentialsNonExpired: true; AccountNonLocked: true; Granted Authorities: ROLE_ADMIN; Password: [PROTECTED]; Authenticated: true; Details: org.springframework.security.ui.WebAuthenticationDetails@12afc: RemoteIpAddress: 127.0.0.1; SessionId: AE56E8925195DFF4C50ABD384574CCEA; Granted Authorities: ROLE_ADMIN Assertion: org.jasig.cas.client.validation.AssertionImpl@661a11 Credentials (Service/Proxy Ticket): ST-3-1lX3acgZ6HNgmhvjXuxB-cas, userId=2, userName=test}

存跳转时候的URL

session {SPRING_SECURITY_SAVED_REQUEST_KEY=SavedRequest[http://localhost:8080/AVerPortal/resourceAction/resourceIndex.action]}

存的是登录成功时候session中存的信息

session {SPRING_SECURITY_CONTEXT=org.springframework.security.context.SecurityContextImpl@87b16984: Authentication: org.springframework.security.providers.cas.CasAuthenticationToken@87b16984: Principal: com.avi.casExtends.UserInfo@ff631d80: Username: test; Password: [PROTECTED]; Enabled: true; AccountNonExpired: true; credentialsNonExpired: true; AccountNonLocked: true; Granted Authorities: ROLE_ADMIN; Password: [PROTECTED]; Authenticated: true; Details: org.springframework.security.ui.WebAuthenticationDetails@12afc: RemoteIpAddress: 127.0.0.1; SessionId: AE56E8925195DFF4C50ABD384574CCEA; Granted Authorities: ROLE_ADMIN Assertion: org.jasig.cas.client.validation.AssertionImpl@661a11 Credentials (Service/Proxy Ticket): ST-3-1lX3acgZ6HNgmhvjXuxB-cas, userId=2, userName=test}

2.在页面端用tag获取

<%@ taglib prefix='security' uri='http://www.springframework.org/security/tags'%>

<security:authentication property="principal.username"></security:authentication>

或者

<security:authorize ifAllGranted="ROLE_ADMIN">

<security:authentication property="principal.username"></security:authentication>

</security:authorize>

或者取session中的值

session.SPRING_SECURITY_CONTEXT.authentication.principal.username等同于

3.在后台获取

UserDetails userDetails = (UserDetails) SecurityContextHolder.getContext()

.getAuthentication()

.getPrincipal();

userDetails.getUsername()

想要获取更多的信息得扩展userDetails的默认实现类user类和UserDetailsService接口

由于springsecurity是把整个user信息放入session中的即：session.SPRING_SECURITY_CONTEXT.authentication.principal

这个就是代表着user对象

因此我做了扩展增加user里的信息 加上userId

代码如下：扩展user

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  package com.avi.casExtends;

import org.springframework.security.GrantedAuthority;

import org.springframework.security.userdetails.User;

public class UserInfo extends User{

private static final long serialVersionUID = 1L;

private String userId;  

@SuppressWarnings("deprecation")
public UserInfo(String username, String password, boolean enabled, GrantedAuthority[] authorities)
    throws IllegalArgumentException {
    super(username,password, enabled, authorities);
}  

public String getUserId() {
    return userId;
}  

public void setUserId(String userId) {
    this.userId = userId;
}  

public static long getSerialVersionUID() {
    return serialVersionUID;
}

}

package com.avi.casExtends;

import org.springframework.security.GrantedAuthority;

import org.springframework.security.userdetails.User;

public class UserInfo extends User{

private static final long serialVersionUID = 1L;

private String userId;

@SuppressWarnings("deprecation")

public UserInfo(String username, String password, boolean enabled, GrantedAuthority[] authorities)

throws IllegalArgumentException {

super(username,password, enabled, authorities);

}

public String getUserId() {

return userId;

}

public void setUserId(String userId) {

this.userId = userId;

}

public static long getSerialVersionUID() {

return serialVersionUID;

}

}

实现userDetailsservice接口

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  package com.avi.casExtends;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.springframework.dao.DataAccessException;

import org.springframework.security.GrantedAuthority;

import org.springframework.security.GrantedAuthorityImpl;

import org.springframework.security.userdetails.UserDetails;

import org.springframework.security.userdetails.UserDetailsService;

import org.springframework.security.userdetails.UsernameNotFoundException;

import com.avi.dao.AccountDao;

import com.avi.data.User;

public class UserInfoService implements UserDetailsService{

private AccountDao accountDao;
private Map<String, UserInfo> userMap = null;  

public UserInfoService() {  

}
public void fillMap(){
     userMap = new HashMap<String, UserInfo>();
     List<User> users = accountDao.findAllUsers();
     UserInfo userInfo = null;
     for(User user:users){
        userInfo = new UserInfo(user.getUserName(),user.getPassword(),true,new GrantedAuthority[]{
            new GrantedAuthorityImpl(user.getRole()),
        });
        userInfo.setUserId(user.getId().toString());  

         userMap.put(user.getUserName(), userInfo);
     }
}  

public UserDetails loadUserByUsername(String username)
    throws UsernameNotFoundException, DataAccessException {
    if(userMap==null)
        fillMap();
    return userMap.get(username);
}  

public AccountDao getAccountDao() {
    return accountDao;
}  

public void setAccountDao(AccountDao accountDao) {
    this.accountDao = accountDao;
}  

public Map<String, UserInfo> getUserMap() {
    return userMap;
}  

public void setUserMap(Map<String, UserInfo> userMap) {
    this.userMap = userMap;
}

}

package com.avi.casExtends;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.springframework.dao.DataAccessException;

import org.springframework.security.GrantedAuthority;

import org.springframework.security.GrantedAuthorityImpl;

import org.springframework.security.userdetails.UserDetails;

import org.springframework.security.userdetails.UserDetailsService;

import org.springframework.security.userdetails.UsernameNotFoundException;

import com.avi.dao.AccountDao;

import com.avi.data.User;

public class UserInfoService implements UserDetailsService{

private AccountDao accountDao;

private Map<String, UserInfo> userMap = null;

public UserInfoService() {

}
public void fillMap(){
  userMap = new HashMap<String, UserInfo>();
     List<User> users = accountDao.findAllUsers();
     UserInfo userInfo = null;
     for(User user:users){
      userInfo = new UserInfo(user.getUserName(),user.getPassword(),true,new GrantedAuthority[]{
       new GrantedAuthorityImpl(user.getRole()),
      });
      userInfo.setUserId(user.getId().toString());

         userMap.put(user.getUserName(), userInfo);
     }
}

public UserDetails loadUserByUsername(String username)
    throws UsernameNotFoundException, DataAccessException {
 if(userMap==null)
  fillMap();
    return userMap.get(username);
}

public AccountDao getAccountDao() {

return accountDao;

}

public void setAccountDao(AccountDao accountDao) {

this.accountDao = accountDao;

}

public Map<String, UserInfo> getUserMap() {

return userMap;

}

public void setUserMap(Map<String, UserInfo> userMap) {

this.userMap = userMap;

}

}

private AccountDao accountDao;是注入进来的查数据库的类

然后修改XML文件指定所要用到的service

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${session.SPRING_SECURITY_CONTEXT.authentication.principal.username}

===================================== 分割线 ======================================

根据以上内容，在扩展了自己的user之后，可以在自己的Thymeleaf下面做一些事情了。

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