spring mvc restful工程demo
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在搭建restful工程之前,首先要保证maven工程会搭建,如果不会的,可以参考我的另外两篇博文
http://blog.csdn.net/haishuitian1/article/details/42783757
http://blog.csdn.net/haishuitian1/article/details/42783793
基本的maven工程搭建成功后,就需要将现在的工程搭建成spring restful工程,具体步骤如下:
1.现在创建的仅仅是一个web工程,第一步需要将web工程改造成spring mvc工程。
(1)pom.xml中引入所需要的spring jar包
<!-- spring begin --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <!-- spring end -->
(2)web.xml的改造
<?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>Archetype Created Web Application</display-name><!--引入spring必须配置的--><servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <!-- 设置dispatchservlet的匹配模式,通过把dispatchservlet映射到/,默认servlet会处理所有的请求,包括静态资源 --> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 设置编码过滤器 非必须的--><filter><filter-name>characterEncodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>utf-8</param-value></init-param></filter><filter-mapping><filter-name>characterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping> </web-app>(3)web.xml中配置了dispatcher后,就需要配置controller了,默认是在dispatcher-servlet.xml中配置
<?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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd" default-lazy-init="true"> <!-- 通过mvc:resources设置静态资源,这样servlet就会处理这些静态资源,而不通过控制器 --> <!-- 设置不过滤内容,比如:css,jquery,img 等资源文件 --> <mvc:resources location="/*.html" mapping="/**.html" /> <mvc:resources location="/css/*" mapping="/css/**" /> <mvc:resources location="/js/*" mapping="/js/**" /> <mvc:resources location="/images/*" mapping="/images/**" /> <!-- 添加注解驱动 @controller--> <mvc:annotation-driven /> <!-- 默认扫描的包路径 --> <context:component-scan base-package="com.nust.rest" /> <!-- mvc:view-controller可以在不需要Controller处理request的情况,转向到设置的View --> <!-- 像下面这样设置,如果请求为/,则不通过controller,而直接解析为/index.jsp --> <mvc:view-controller path="/" view-name="index" /> <bean class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property> <!-- 配置jsp路径前缀 --> <property name="prefix" value="/"></property> <!-- 配置URl后缀 --> <property name="suffix" value=".jsp"></property> </bean> </beans>
(4)然后是jsp中新增表单信息
<form action="login"> 用户名:<input id="username" name="username" type="text"></input><br> 密 码:<input id="username" name="password" type="password"></input><br> <input type="submit"> </form>对应的controller是
@Controllerpublic class RestController {@RequestMapping("login") //用来处理前台的login请求 private @ResponseBody String hello( @RequestParam(value = "username", required = false)String username, @RequestParam(value = "password", required = false)String password ){ return "Hello "+username+",Your password is: "+password; } }
和大部分人一样,在搭建的过程中并不是一帆风顺的,其中碰到一个关键性错误问题:
java.lang.ClassNotFoundException: org.springframework.web.filter.CharacterEncodingFilter
很明显是jar包没有找到,我找了好多办法,最后都想手动lib下添加jar包了,但是还是通过这篇博文找到了答案:
http://blog.sina.com.cn/s/blog_8ced01900101ba3f.html
2.spring mvc改造成功之后,接下来要改造成restful的形式
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