intellij idea 12 搭建maven web项目 freemarker + spring mvc

配置spring mvc ，写这篇文章的时候spring已经出了4.0 这里还是用稳定的3.2.7.RELEASE，先把spring和freemarker配置好

1.spring mvc配置

在web.xml中添加

<!-- Spring MVC配置 -->
<!-- ====================================== -->
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 可以自定义servlet.xml配置文件的位置和名称，默认为WEB-INF目录下，名称为[<servlet-name>]-servlet.xml，如spring-servlet.xml
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-servlet.xml</param-value>  默认
</init-param>
-->
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>

sping通过DispatherServlet做分发，如果不指定配置文件就是项目名-servlet.xml，这里已经制定了spring-servlet.xml

这里再看spring-servlet.xml的配置

<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 
<!-- 启用spring mvc 注解 -->
<context:annotation-config/>

<!-- 设置使用注解的类所在的jar包 -->
<context:component-scan base-package="com.spring.controller"></context:component-scan>

<!-- 完成请求和注解POJO的映射 -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>

<!-- freemarker的配置 -->
<bean id="freemarkerConfigurer"
class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
<property name="templateLoaderPath" value="/WEB-INF/view/" />
<property name="defaultEncoding" value="GBK" />
<property name="freemarkerSettings">
<props>
<prop key="template_update_delay">10</prop>
<prop key="locale">zh_CN</prop>
<prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop>
<prop key="date_format">yyyy-MM-dd</prop>
<prop key="number_format">#.##</prop>
</props>
</property>
</bean>
<!-- FreeMarker视图解析 如返回userinfo。。在这里配置后缀名ftl和视图解析器。。 -->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.freemarker.FreeMarkerView" />
<property name="suffix" value=".ftl" />
<property name="contentType" value="text/html;charset=GBK" />
<property name="exposeRequestAttributes" value="true" />
<property name="exposeSessionAttributes" value="true" />
<property name="exposeSpringMacroHelpers" value="true" />
</bean>
</beans>

<bean id="freemarkerConfigurer"
class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">这个地方写入之后就报找不到类，原来光引用freemarker的类和spring-framework的类还不够，还少一个spring-context-support，添加这个类后正常了

org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter 这里引用的spring版本为3.2.7 这个类已经是废弃的了，源码里注释了

*
* @deprecated in Spring 3.2 in favor of
* {@link org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter RequestMappingHandlerAdapter}
*/
@Deprecated
public class AnnotationMethodHandlerAdapter extends WebContentGenerator
implements HandlerAdapter, Ordered, BeanFactoryAware

既然说了，那就用最新的，稍微找了下，没找到RequestMappingHandlerAdapter有什么区别，望指教

既然都配置好了，剩下就是写个controller了

package com.spring.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

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

@Controller
@RequestMapping("/message")
public class IndexController {

@RequestMapping(value = "/index", method = RequestMethod.GET)
public String index(HttpServletRequest request, HttpServletResponse response,ModelMap modelMap) {
modelMap.put("some", "spring freemarker模板终能使用");
return "index";
}
}

然后是freemarker模板，非常简单，文件放到/WEB-INF/view/下

<html>
<body>
<h2>freemarker</h2>

<div>${some}</div>
</body>
</html>

既然配置好了，就开始启动测试下，然后就出现了各种问题。。。

首先就是几个类找不到，最经典的javax.servlet.http.HttpServletResponse和javax.servlet.http.HttpServletRequest 本来就是servlet-api.jar包里的，由于公司有私服，添加了几个都不对，先把现在正确的pom文件发下

<?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>SpringMvc</groupId>
<artifactId>SpringMvc</artifactId>
<version>1.0-SNAPSHOT</version>

<dependencies>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-plugin-api</artifactId>      //这个经过我的测试，发现根本不用添加
<version>3.1.0</version>
</dependency>

<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>servlet-api</artifactId>          //这个经过我的测试，发现根本不用添加
<version>6.0.37</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.2.7.RELEASE</version>
</dependency>

<dependency>
<groupId>servletapi</groupId>
<artifactId>servlet-api</artifactId>    //这个是主要的servlet-api，在公共maven仓库上找了半天都没找对，因为我搜索的时候都是搜索的servlet-api，后来才知道直接搜servletapi就对了
<version>2.4-20040521</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>3.2.6.RELEASE</version>
</dependency>

<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.20</version>
</dependency>

<dependency>
<groupId>org.springframework.ws</groupId>
<artifactId>spring-ws-core</artifactId>
<version>2.1.4.RELEASE</version>
</dependency>

</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<configuration>
<scanIntervalSeconds>1</scanIntervalSeconds>
<stopPort>9966</stopPort>
<stopKey>foo</stopKey>
<connectors>
<connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">
<port>7777</port>
<maxIdleTime>60000</maxIdleTime>
</connector>
</connectors>
<webAppSourceDirectory>
${basedir}/webapp
</webAppSourceDirectory>
<webAppConfig>
<contextPath>/spring</contextPath>
</webAppConfig>
</configuration>
</plugin>
</plugins>
</build>

</project>

终于知道了添加servlet-api的包应该是哪个，真是郁闷http://www.mvnrepository.com/artifact/servletapi/servlet-api/2.4-20040521

启动成功了之后，访问地址http://127.0.0.1:7777/spring/message/index.do，报错

javax.servlet.ServletException: No adapter for handler [controller.UserInfoController@1470933]: The DispatcherServlet configuration needs to include a HandlerAdapter that supports this handler

之前完全没遇上过这种错，上网查说要加了两个adapter，就可以了

<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>
<bean class="org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter"/>

发现不行，后来修改了spring-servlet.xml 把这里又改回来了

<!-- 完成请求和注解POJO的映射 -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />就可以了

废弃的方法就废弃吧，先解决问题再说

在后面就是想传对象到freemarker里，原来我记得使用过modelandview，但是好像要添加什么配置，因为使用这个访问不到放到modelandview里的对象，所以有换成了modelmap，终于完成了

这次主要目的就是在intellij上配置一个maven 的web项目，在加上spring mvc和freemarker，没想到出现这么多的问题，使用jetty插件的目的是在项目启动期间，修改freemarker模板能即时生效，而

使用独立tomcat的话，还得部署才行，而插件很方便。这些东西配置好之后，就该加上mybatis和mongodb了