Web集成

大多数情况，web项目都会集成spring。shiro在普通web项目和spring项目中的配置是不一样的。

本次介绍普通的web项目，不使用任何框架。

shiro配置文件（shiro.ini）

创建web项目，然后在src下创建shiro.ini

[main]
#默认的登录界面是/login.jsp
authc.loginUrl=/login.jsp
roles.unauthorizedUrl=/unauthorized
perms.unauthorizedUrl=/unauthorized
authcBasic.applicationName=please login
[users]
zhang=123,admin
wang=123
[roles]
admin=user:*,menu:*
[urls]
/login=anon
/success=authc
/unauthorized=anon
/static/**=anon
/authenticated=authc
/role=authc,roles[admin]
/permission=authc,perms["user:create"]

这里需要关注的有几个：

authc.loginUrl=/login.jsp
/login=anon
/success=authc

当访问/success这个路径的时候，如果没有登录，将会自动跳转到登录界面/login.jsp，访问/login这个路径的时候，可以不用登录

界面

准备登录界面和登录成功的界面

登录界面

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>请登录</title>
</head>
<body>
    <h1>login</h1>
    <form action="login">
        <label>username:</label>
        <input type="text" name="username"/>
        <label>password:</label>
        <input type="text" name="password"/>
        <input type="submit" value="submit"/>
    </form>
</body>
</html>

登录成功界面

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>登录成功</title>
</head>
<body>
<h1>SUCCESSFUL</h1>
</body>
</html>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>shiro-web</display-name>
  <!-- 该配置的作用是让shiro在项目启动的时候随之启动 -->
  <listener>
    <listener-class>org.apache.shiro.web.env.EnvironmentLoaderListener</listener-class>
  </listener>
  <!-- 配置shiro配置文件的位置，默认位置是/WEB-INF/shiro.ini -->
  <context-param>
    <param-name>shiroConfigLocations</param-name>
    <param-value>classpath:shiro.ini</param-value>
  </context-param>
  <!-- shiro过滤器 -->
  <filter>
    <filter-name>ShiroFilter</filter-name>
    <filter-class>org.apache.shiro.web.servlet.ShiroFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>ShiroFilter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>REQUEST</dispatcher>
    <dispatcher>FORWARD</dispatcher>
    <dispatcher>INCLUDE</dispatcher>
    <dispatcher>ERROR</dispatcher>
  </filter-mapping>
</web-app>

Servlet

LoginServlet：处理登录请求的servlet，如果登录成功，重定向到/success

package com.shiro.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.IncorrectCredentialsException;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.subject.Subject;

/**
 * Servlet implementation class LoginServlet
 */
@WebServlet(name="/LoginServlet",urlPatterns="/login")
public class LoginServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String username = request.getParameter("username");
        String password = request.getParameter("password");

        Subject currentUser = SecurityUtils.getSubject();

        UsernamePasswordToken token = new UsernamePasswordToken(username,password);
        try {
            currentUser.login(token);
        } catch (UnknownAccountException e) {
            System.out.println("沒有這個用戶");
        } catch (IncorrectCredentialsException e) {
            System.out.println("密碼錯誤");
        } catch (AuthenticationException e) {
        //其他错误，比如锁定，如果想单独处理请单独 catch 处理
            System.out.println("其他错误：" + e.getMessage());
        }
        response.sendRedirect(request.getContextPath()+"/success");
    }


    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

SuccessServlet：登录成功界面对应Servlet，只起到转发的作用

package com.shiro.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class SuccessServlet
 */
@WebServlet(name="/SuccessServlet",urlPatterns="/success")
public class SuccessServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;


    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.getRequestDispatcher("/WEB-INF/views/success.jsp").forward(request, response);
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

做到这里，基本的web集成就已经完成，但是在实际开发中，我们通常需要配置Realm等其他组件，从数据库中读取用户信息，用户的角色，权限等

shiro-web集成

Web集成

shiro配置文件（shiro.ini）

界面

web.xml

Servlet

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