shiro+mybatis+springmvc實例記錄（二）——shiro支持ajax請求

接上文，頁面跳轉顯然不適合動靜分離ajax交互的架構模式，因此就需要對框架進行改造優化，使得後臺能夠返回json數據給前端請求。

自定義攔截器

shiro對權限、用戶信息的校驗實在默認的攔截器中進行的，要改寫數據返回方式，則需要重寫攔截器。這裏我們分別對authc,perms進行重寫。
分別定義兩個攔截器，並使用printWriter將json字符串寫入response中。
LoginFilter

package com.testshiro.filter;

import java.io.IOException;
import java.io.PrintWriter;

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

import org.apache.log4j.Logger;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.web.filter.authc.FormAuthenticationFilter;

    //用戶登錄校驗失敗回調方法，也可以自己重寫校驗方法isAccessAllowed
    @Override
    protected boolean onAccessDenied(ServletRequest request,
            ServletResponse response) throws Exception {
        HttpServletRequest httpServletRequest = (HttpServletRequest) request;
        HttpServletResponse httpServletResponse = (HttpServletResponse) response;

        //設置編碼格式，header的content-type也要設置，否則瀏覽器不會以utf8解析，還是亂碼。設置application/json可以讓js不需要eval即可使用對象
        httpServletResponse.setCharacterEncoding("UTF-8");
        httpServletResponse.setHeader("Content-type",
                "application/json;charset=UTF-8");
        PrintWriter out;
        try {
            out = httpServletResponse.getWriter();
            out.println("{\"code\":-1,\"msg\":\"未登錄用戶！\"}");
            out.flush();
            out.close();
        } catch (IOException e1) {
            log.info(e1.getMessage());
        }
        return false;
    }

    @Override
    protected boolean onLoginFailure(AuthenticationToken token,
            AuthenticationException e, ServletRequest request,
            ServletResponse response) {
        HttpServletRequest httpServletRequest = (HttpServletRequest) request;
        HttpServletResponse httpServletResponse = (HttpServletResponse) response;

        httpServletResponse.setCharacterEncoding("UTF-8");
        httpServletResponse.setHeader("Content-type",
                "application/json;charset=UTF-8");
        PrintWriter out;
        try {
            out = httpServletResponse.getWriter();
            out.println("{\"code\":-1,\"msg\":\"系統錯誤\"}");
            out.flush();
            out.close();
        } catch (IOException e1) {
            log.info(e1.getMessage());
        }
        return false;
    }

    @Override
    protected boolean onLoginSuccess(AuthenticationToken token,
            Subject subject, ServletRequest request, ServletResponse response)
            throws Exception {
        return super.onLoginSuccess(token, subject, request, response);
    }

    private final static Logger log =
    Logger.getLogger(LoginFilter.class);
}

PermsFilter

package com.testshiro.filter;

import java.io.IOException;
import java.io.PrintWriter;

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

import org.apache.log4j.Logger;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.web.filter.authz.PermissionsAuthorizationFilter;

public class PermsFilter extends PermissionsAuthorizationFilter {

    private final static Logger log = Logger.getLogger(PermsFilter.class);

    @Override
    protected boolean onAccessDenied(ServletRequest arg0, ServletResponse arg1)
            throws IOException {
        HttpServletRequest httpServletRequest = (HttpServletRequest) arg0;
        HttpServletResponse httpServletResponse = (HttpServletResponse) arg1;

        httpServletResponse.setCharacterEncoding("UTF-8");
        httpServletResponse.setHeader("Content-type",
                "application/json;charset=UTF-8");
        PrintWriter out;
        try {
            out = httpServletResponse.getWriter();
            out.println("{\"code\":-1,\"msg\":\"登錄用戶無權執行該操作！\"}");
            out.flush();
            out.close();
        } catch (IOException e1) {
            log.info(e1.getMessage());
        }
        return false;
    }
}

接下來在配置文件中配置自定義攔截器
spring-shiro.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:util="http://www.springframework.org/schema/util"  
    xsi:schemaLocation="http://www.springframework.org/schema/beans   
    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd   
    http://www.springframework.org/schema/tx   
    http://www.springframework.org/schema/tx/spring-tx-4.0.xsd  
    http://www.springframework.org/schema/context  
    http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/util
    http://www.springframework.org/schema/util/spring-util-4.0.xsd"
  >
     <!-- Shiro Filter 攔截器相關配置 -->  
    <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">  
        <!-- securityManager -->  
        <property name="securityManager" ref="securityManager" /> 
        <property name="loginUrl" value="/login.jsp" />  
        <property name="unauthorizedUrl" value="/403.jsp" />
        <property name="filters">
            <util:map>
                <entry key="authc" value-ref="loginFilter"/>
                <entry key="perms" value-ref="authoFilter"/>
            </util:map>
        </property>
        <!-- 過濾鏈定義 -->  
        <property name="filterChainDefinitions">  
            <value>  
                /data/sysaccount/login*=anon
                /data/sysaccount/**=authc,perms[sysAccount]
                /data/sysautho/**=authc,perms[sysAutho]
                /data/sysrole/**=authc,perms[sysRole]
             </value>  
        </property>  
    </bean>  
    <bean id="loginFilter" class="com.testshiro.filter.LoginFilter"/>
    <bean id="authoFilter" class="com.testshiro.filter.PermsFilter"/>
    <!-- securityManager -->
    <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">  
        <property name="realm" ref="myRealm" />  
    </bean>  
    <!-- 自定義Realm實現 --> 
    <bean id="myRealm" class="com.testshiro.realm.CustomRealm" />  

    <bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor" />



</beans>  

啓動服務器即可。

js頁面部分代碼

.ajax({
                url : xxxx,
                type : "GET",
                success : function(data) {
                    if("code" in data&&data.code==-1){
                        alert(data.msg);
                        return;
                    }
                }
            })
            ......

運行效果

未登錄情況：

未授權，post請求情況

正常情況