我在下面得到一个奇怪的行为：我在Spring Controller中添加了一个模型对象，当我在jsp中使用jstl访问相同的对象时，那什么都没得到。
我的项目是基于Java 1.8+ Tomcat 8.0+ Maven构建的REST。
我的Maven项目被命名为带有模块report-rest和report-dao的报告。Jsp页面和控制器位于report-rest。
pom。其余报告中的xml内容
<?xml version="1.0"?> <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.reporting</groupId> <artifactId>reporting</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <artifactId>reporting-rest</artifactId> <packaging>war</packaging> <properties> <servlet.version>2.5</servlet.version> <spring.version>3.2.4.RELEASE</spring.version> <log4j.version>1.2.17</log4j.version> <jdk.version>1.7</jdk.version> <context.path>SpringRestSecurityOauth</context.path> <spring.security.version>3.2.5.RELEASE</spring.security.version> </properties> <name>reporting-rest Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <!-- <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-io</artifactId> <version>1.3.2</version> </dependency> --> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <!-- log4j --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>cglib</groupId> <artifactId>cglib</artifactId> <version>2.2.2</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <!-- Spring Security --> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-web</artifactId> <version>${spring.security.version}</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-config</artifactId> <version>${spring.security.version}</version> </dependency> <dependency> <groupId>org.springframework.security.oauth</groupId> <artifactId>spring-security-oauth2</artifactId> <version>1.0.0.RELEASE</version> </dependency> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.2.2</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.10</version> </dependency> <dependency> <groupId>commons-httpclient</groupId> <artifactId>commons-httpclient</artifactId> <version>3.1</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>org.reporting.dao</groupId> <artifactId>reporting-dao</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> </dependencies> <build> <finalName>reporting-rest</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-eclipse-plugin</artifactId> <version>2.9</version> <configuration> <downloadSources>true</downloadSources> <downloadJavadocs>false</downloadJavadocs> <wtpversion>2.0</wtpversion> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.3.2</version> <configuration> <source>${jdk.version}</source> <target>${jdk.version}</target> </configuration> </plugin> </plugins> </build> </project>
报告中的pom.xml内容（父级）
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.reporting</groupId> <artifactId>reporting</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>pom</packaging> <properties> <org.springframework.version>3.2.4.RELEASE</org.springframework.version> <org.slf4j-version>1.7.5</org.slf4j-version> <org.json.version>20080701</org.json.version> <jackson-mapper.version>1.9.12</jackson-mapper.version> <jsp.version>2.2</jsp.version> <junit.version>4.11</junit.version> <org.postgresql.version>9.0-801.jdbc4</org.postgresql.version> <commons-dbcp.version>1.4</commons-dbcp.version> <cglib.version>2.2.2</cglib.version> <servlet.version>2.5</servlet.version> <spring-security.version>3.1.4.RELEASE</spring-security.version> <org.aspectj.version>1.6.12</org.aspectj.version> <spring-aop.version>3.2.5.RELEASE</spring-aop.version> <org.testng.version>6.8.7</org.testng.version> <spring-test.version>3.2.5.RELEASE</spring-test.version> <org.aspectj.version>1.6.2</org.aspectj.version> <env>dev</env> <project.parent.basedir>../</project.parent.basedir> </properties> <modules> <module>reporting-rest</module> <module>reporting-dao</module> </modules> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${org.slf4j-version}</version> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${org.springframework.version}</version> </dependency> </dependencies> </project>
网络。xml文件
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <display-name>Archetype Created Web Application</display-name> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:config/*-context.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>reporting</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>0</load-on-startup> </servlet> <servlet-mapping> <servlet-name>reporting</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- <filter> <filter-name>springSecurityFilterChain</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <filter-mapping> <filter-name>springSecurityFilterChain</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> --> <session-config> <session-timeout>60</session-timeout> </session-config> </web-app>
Servlet XML文件用于报告剩余部分
<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:task="http://www.springframework.org/schema/task" xmlns:oxm="http://www.springframework.org/schema/oxm" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.1.xsd"> <context:component-scan base-package="org.reporting.rest" /> <!-- <context:annotation-config/> --> <mvc:annotation-driven /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> </beans>
报告休息的控制器类
@Controller @RequestMapping("/api/admin/") public class AdminController { @RequestMapping(value = "/clients", method = RequestMethod.GET) public ModelAndView listClients() { ModelAndView model = new ModelAndView("clientDetails"); //List<Client> clients=adminDAO.getClients(); List<String> lists = new ArrayList<String>(); lists.add("List A"); lists.add("List B"); lists.add("List C"); lists.add("List D"); lists.add("List 1"); lists.add("List 2"); lists.add("List 3");; model.addObject("lists",lists ); model.addObject("matter","This is another matter" ); return model; } }
jsp视图位于report-rest
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <html> <body> <h2>List Clients</h2> ${lists} Matter:: ${matter} <c:if test="${not empty lists}"> <ul> <c:forEach var="listValue" items="${lists}"> <li>${listValue}</li> </c:forEach> </ul> </c:if> </body> </html>
在上面的输出jsp上打印：
List Clients ${lists} Matter:: ${matter}
没有内容打印出来，并且在$ {}中得到了这样的内容
请对此提供帮助。
使用<％@页面isELIgnored =“ false”％>解决的问题。感谢http://www.mkyong.com/spring- mvc/modelandviews-model-value-is-not-displayed-in-jsp-via- el/
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.4//EN" "http://java.sun.com/dtd/web-app_2_4.dtd" > <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <html> <head> <%@ page isELIgnored="false" %> </head> <body> <h2>List Clients</h2> <c:out value="${lists}"/> Matter:: ${matter} <c:if test="${not empty lists}"> <ul> <c:forEach var="listValue" items="${lists}"> <li>${listValue}</li> </c:forEach> </ul> </c:if> </body> </html>
