spring 代码

本文介绍了一个使用SpringMVC实现的基本登录验证流程及页面重定向的示例。通过@Controller注解定义了两个控制器类,分别用于处理主页跳转和登录验证。在登录控制器中实现了对用户输入的用户名和密码进行校验,并返回布尔值表示验证结果。

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@Controller
public class HtmlController {
@RequestMapping(value={“index.html”,”index”})
public String handleHtml(HttpServletRequest request){
//return request.getRequestURI();
return “redirect:/index.html”;
}

}

@Controller
public class LoginController {

private UserService userService = new UserServiceImpl();

@RequestMapping("/login")
protected void login(HttpServletRequest request, 
                        HttpServletResponse response) {
    Boolean result = null;

    String userName = request.getParameter("userName");
    String password = request.getParameter("password");
    if(userName == null || userName.equals("")) {
        result=false;
    }else if(password==null || password.equals("")) {
        result = false;
    }else {
        //校验用户名和密码是否正确
        UserVo userVo = new UserVo();
        userVo.setUsername(userName);
        userVo.setPassword(password);
        result = userService.checkUserLoginInfo(userVo);
    }

    try {
        OutputStream outputStream = response.getOutputStream();
        outputStream.write(result.toString().getBytes());
        outputStream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

}

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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"  
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"  
    version="3.0">  
    <display-name></display-name>  
    <context-param>  
        <param-name>contextConfigLocation</param-name>  
        <param-value>  
            classpath:applicationContext.xml  
        </param-value>  
    </context-param>  
   <!--  <listener>  
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
    </listener> -->  
    <servlet-mapping>
        <servlet-name>default</servlet-name>  
        <url-pattern>*.js</url-pattern>  
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>default</servlet-name>  
        <url-pattern>*.html</url-pattern>  
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>default</servlet-name>  
        <url-pattern>*.css</url-pattern>  
    </servlet-mapping>
     <error-page>
        <error-code>404</error-code>
        <location>/WEB-INF/error/404.html</location>
    </error-page>
    <error-page>
        <error-code>500</error-code>
        <location>/WEB-INF/error/500.html</location>
    </error-page>
    <servlet>  
        <servlet-name>springmvc</servlet-name>  
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
        <load-on-startup>1</load-on-startup>  
    </servlet>  
    <servlet-mapping>  
        <servlet-name>springmvc</servlet-name>  
        <url-pattern>/</url-pattern>
    </servlet-mapping>  
</web-app>  

springmvc-servlet.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:context="http://www.springframework.org/schema/context"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
            http://www.springframework.org/schema/beans/spring-beans-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/mvc  
            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
            ">
    <!-- 扫描控制器包-->
    <context:component-scan base-package="com.cmb.ccc.controller" />
    <!-- 启用spring mvc 注解-->
    <mvc:annotation-driven />
    <!-- 配置拦截器, 多个拦截器,顺序执行  -->

    <mvc:interceptors>  
        <mvc:interceptor>  
            <mvc:mapping path="/**" />

            <bean class="com.cmb.ccc.interceptor.LoginInterceptor"></bean>  
        </mvc:interceptor>
    </mvc:interceptors>
</beans>
package cn.javass.spring.chapter4; import java.io.File; import java.io.IOException; import junit.framework.Assert; import org.jboss.vfs.VFS; import org.jboss.vfs.VirtualFile; import org.jboss.vfs.spi.RealFileSystem; import org.junit.Test; import org.springframework.core.io.Resource; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.core.io.support.ResourcePatternResolver; @SuppressWarnings("all") public class ResourcePatternTest { @Test public void testClasspathPrefix() throws IOException { ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); //只加载一个绝对匹配Resource,且通过ResourceLoader.getResource进行加载 Resource[] resources = resolver.getResources("classpath:META-INF/INDEX.LIST"); Assert.assertEquals(1, resources.length); //只加载一个匹配的Resource,且通过ResourceLoader.getResource进行加载 resources = resolver.getResources("classpath:META-INF/*.LIST"); Assert.assertTrue(resources.length == 1); //只加载一个绝对匹配Resource,且通过ResourceLoader.getResource进行加载 resources = resolver.getResources("classpath:META-INF/MANIFEST.MF"); Assert.assertEquals(1, resources.length); } @Test public void testClasspathAsteriskPrefix() throws IOException { ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); //将加载多个绝对匹配的所有Resource //将首先通过ClassLoader.getResources("META-INF")加载非模式路径部分 //然后进行遍历模式匹配 Resource[] resources = resolver.getResources("classpath*:META-INF/INDEX.LIST"); Assert.assertTrue(resources.length > 1); //将加载多个模式匹配的Resource resources = resolver.getResources("classpath*:META-INF/*.LIST"); Assert.assertTrue(resources.length > 1); } @Test public void testClasspathAsteriskPrefixLimit() throws IOException { ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); //将首先通过ClassLoader.getResources("")加载目录, //将只返回文件系统的类路径不返回jar的跟路径 //然后进行遍历模式匹配 Resource[] resources = resolver.getResources("classpath*:asm-*.txt"); Assert.assertTrue(resources.length == 0); //将通过ClassLoader.getResources("asm-license.txt")加载 //asm-license.txt存在于com.springsource.net.sf.cglib-2.2.0.jar resources = resolver.getResources("classpath*:asm-license.txt"); Assert.assertTrue(resources.length > 0); //将只加载文件系统类路径匹配的Resource resources = resolver.getResources("classpath*:LICENS*"); Assert.assertTrue(resources.length == 1); } @Test public void testFilekPrefix() throws IOException { ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); Resource[] resources = resolver.getResources("file:D:/*.txt"); Assert.assertTrue(resources.length > 0); } @Test public void testVfsPrefix() throws IOException { //1.创建一个虚拟的文件目录 VirtualFile home = VFS.getChild("/home"); //2.将虚拟目录映射到物理的目录 VFS.mount(home, new RealFileSystem(new File("d:"))); //3.通过虚拟目录获取文件资源 VirtualFile testFile = home.getChild("test.txt"); ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); Resource[] resources = resolver.getResources("/home/test.txt"); Assert.assertTrue(resources.length > 0); System.out.println(resources[0].getClass()); } }
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