Spring security实现国际化问题

这两天Spring用户登录国际化这个问题困扰我好久啊，于昨天晚上终于把它干掉了。

场景就是我们公司的产品-incopat，需要支持中英文，用户登录这块用的spring自带的security，需求讲的通俗一点就是，中文版提示中文提示信息，英文版提示英文版信息，废话不多说，见代码。

首先配置文件

security-config.xml

<beans:bean id="customUsernamePasswordAuthenticationFilter"
        class="com.incoshare.base.security.CustomUsernamePasswordAuthenticationFilter"
        p:authenticationManager-ref="authenticationManager"
        p:filterProcessesUrl="/doLogin" p:sessionAuthenticationStrategy-ref="compositeSessionAuthenticationStrategy"
        p:authenticationSuccessHandler-ref="authenticationSuccessHandler"
        p:authenticationFailureHandler-ref="authenticationFailureHandler"
        p:rememberMeServices-ref="rememberMeServices"
        p:authenticationDetailsSource-ref="customWebAuthenticationDetailsSource">
</beans:bean>


<beans:bean id="messageSource"
        class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <beans:property name="basename"
            value="classpath:messages/security/messages" />
</beans:bean>

配置文件只贴了关键部分，第一个bean 配置登录的过滤器，第二个bean加载messages文件（这里有需要注意的地方如果想引用自己的message文件，建好文件后提供相对地址就可以了，classpath必须要哦！文件命名也是有规则的，message_en  就是下划线带上语言简称，这个简称需要跟网站上切换中英文标示一致），配置文件就这些

下面贴上过滤器代码

package com.incoshare.base.security;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.incoshare.base.util.PropertyUtil;
import com.incoshare.base.util.Utils;
import com.incoshare.incopat4.model.User;
import com.incoshare.incopat4.service.usermanager.UserListService;
import com.incoshare.util.EncryptUtils;
import com.incoshare.util.SingleLoginUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.security.authentication.AuthenticationServiceException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.i18n.SessionLocaleResolver;
import org.springframework.web.util.WebUtils;

import com.incoshare.base.util.RegexUtil;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class CustomUsernamePasswordAuthenticationFilter extends UsernamePasswordAuthenticationFilter{
    
    static Logger logger = LoggerFactory
            .getLogger(CustomUsernamePasswordAuthenticationFilter.class);

    private boolean postOnly = true;

    private byte[] keyBytes = { 0x21, 0x12, 0x4F, 0x58, (byte) 0x88, 0x09, 0x40, 0x38, 0x74,
            0x25, (byte) 0x99, 0x21, (byte) 0xCB, (byte) 0xDD, 0x58, 0x66, 0x77, 0x22, 0x74,
            (byte) 0x98, 0x30, 0x40, 0x36, (byte) 0xE2 };
    private byte[] keyBytesForSjz = { 0x22, 0x12, 0x4F, 0x58, (byte) 0x88, 0x09, 0x40, 0x38, 0x74,
            0x25, (byte) 0x99, 0x21, (byte) 0xCB, (byte) 0xDD, 0x48, 0x66, 0x77, 0x22, 0x74,
            (byte) 0x98, 0x30, 0x40, 0x36, (byte) 0xE2 };
    @Autowired
    UserListService userListService;
    @Autowired
    PropertyUtil propertyUtil;

    @Override
     public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {
        
            
        String newLocale = request.getParameter("locallangue");
        if (newLocale != null) {
            Locale locale = StringUtils.parseLocaleString(newLocale);
            WebUtils.setSessionAttribute(request,
                SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME, locale);
            LocaleContextHolder.setLocale(locale, true);
        }
            //这块代码就是通过获取前台返回的语言编码，设置到spring的localeContextHolder里
            if (postOnly && !request.getMethod().equals("POST")) {
                throw new AuthenticationServiceException("Authentication method not supported: " + request.getMethod());
            }

            String username = obtainUsername(request);
            String password = obtainPassword(request);

            //集慧智佳用户登录
            String token = request.getParameter("token");
            //石家庄单点登录
            String tokenForSjz = request.getParameter("tokenForSjz");
            if(Utils.isNotNull(token) || Utils.isNotNull(tokenForSjz)){
                boolean judge = true;
                if(Utils.isNull(token)){
                    judge = false;
                }
                SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH");
                Date date = new Date();
                String dateStr = simpleDateFormat.format(date);
                String decodeToken = "";
                String decryptJudge = "";
                if(judge){
                    decodeToken = EncryptUtils.DataDecrypt(keyBytes, token);
                    decryptJudge = token;
                }else{
                    decodeToken = EncryptUtils.DataDecrypt(keyBytesForSjz, tokenForSjz);
                    decryptJudge = tokenForSjz;
                };
                if(!decodeToken.equals(decryptJudge.trim()) && decodeToken.equals(dateStr.trim())){

                        User user = userListService.queryUserJhzj(username);
                        if(Utils.isNotNull(user)){
                            if(Utils.isNotNull(user.getOrganizationId())){
                                if(judge){
                                    String jhzjOrid=propertyUtil.getContextProperty("jhzjOrid");
                                    String pwd = propertyUtil.getContextProperty("jhzjPassword").trim();
                                    if(user.getOrganizationId().equals(Integer.parseInt(jhzjOrid.trim()))){
                                        password = pwd;
                                    }
                                }else{
                                    if(Utils.isNotNull(password)){
                                        String record = password;
                                        String orid = propertyUtil.getContextProperty("sjzOrid").trim();
                                        password = EncryptUtils.DataDecrypt(keyBytesForSjz,password);
                                        if(record.equals(password) || !String.valueOf(user.getOrganizationId()).equals(orid)){
                                            password = "";
                                        }
                                    }
                                }

                            }
                        }

                }else{
                    password = "";
                }
            }

        String tokenForLogin = request.getParameter("tokenForLogin");
        if(Utils.isNotNull(tokenForLogin)){
            String companyName = request.getParameter("companyName");
            String record = password;
            tokenForLogin = tokenForLogin.replaceAll(" ","+");
            password = SingleLoginUtils.decryptPassword(username,password,tokenForLogin,companyName,userListService,propertyUtil,logger);
            if(Utils.isNull(password)){
                logger.info("{}:密码解密为空。账号{},没有解密的密码:{}",companyName,username,record);
            }
        }
        if (username == null) {
                    username = "";
                }

            if (password == null) {
                    password = "";
                }


            username = username.trim();

            UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(username, password);
            
            if(!StringUtils.isEmpty(request.getParameter("iplogin"))) {
                username = RegexUtil.getRealIp(request);
                password="";
                authRequest = new IpUserAuthenticationToken(username,password);
            }
            
            this.logger.info("user:{},ip:{} trying to login",new Object[]{username,RegexUtil.getRealIp(request)});

            // Allow subclasses to set the "details" property
            setDetails(request, authRequest);

            return this.getAuthenticationManager().authenticate(authRequest);
        }
}

这块先声明下，代码不是我写的，看着很乱很糟糕吧。主要上边标黄的两个地方就可以了。

值设置后会通过this.getAuthenticationManager().authenticate(authRequest) 去初始化，喜欢研究源码的朋友看一跟一下看看

org.springframework.context.i18n.LocaleContextHolder这个类

public static LocaleContext getLocaleContext() {
        LocaleContext localeContext = localeContextHolder.get();
        if (localeContext == null) {
            localeContext = inheritableLocaleContextHolder.get();//这里会把你设置的值放到Spring 容器
        }
        return localeContext;
}

好了，关键的地方都说完了，这几天搞了这么久，写完了也没多少东西，代码就是这么美妙，解决问题的过程是漫长苦恼的，但最终解决有可能就一两行代码的事。

关于这一块有问题的可以随时沟通。