package org.base.controller;
import org.base.pojo.Department;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
@Controller
public class DeptController {/*** 映射的url http://localhost:端口号/项目名/test.do* 跳转到 (prefix)test.jsp(suffix)页面*/@RequestMapping("/test")public String test(){System.out.println("test");return "test";}/*** 如果方法无返回值，则跳转到 testP.jsp页面，即映射名* 对于方法中的参数，可以对应url中的参数自动赋值* 这里注意，如果url中的参数和方法定义的不一致，例如，此处的age=1.5，那么会报400错误*/@RequestMapping("/testP")public void testParam(String name,Integer age){System.out.println("name:"+name+",age:"+age);}/*** 也可以显式声明url参数*/@RequestMapping("/testP1")public void testParam1(@RequestParam("name")String name,Integer age){System.out.println("name:"+name+",age:"+age);}/*** 自动注入bean属性，注意，url中形式是 departmentId=12,不是  对象.属性  形式*/@RequestMapping("/testP2")public void testParam2(Department dept){System.out.println("dept:"+dept);}
/*** ResponseBody注解：此方法返回值直接写入 response的body中，默认是json* 注意要导入  jackson.jar*/@RequestMapping("/test2")@ResponseBodypublic Department test2(){Department dept = new Department(12, "abc", 31, 5);return dept;} //@RequestMapping 注解的方法支持很多参数： HttpServletRequest/Response,HttpSession,Writer// 不支持对象.属性传值方法，如果重名，/*** restful 风格的传参方式*/@RequestMapping("/test3/{str}")public void test3(@PathVariable("str")String str){System.out.println("str:"+str);}/*** date 日期类型的注入*/@RequestMapping("/test4")public void test4(@DateTimeFormat(iso=ISO.DATE)Date d){if(d!=null)System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(d));}
}

@ResponseBody 可以将该方法返回的值 写入到 response的body中去(String,json,xml)。

@RequestMapping 也可以用于整个类

@Controller
@RequestMapping("/emp/*")
public class EmpController {@RequestMapping("test1") // 这里匹配的url就是/emp/test1.dopublic void test1(String s){System.out.println("s:"+s);}
}

spring 配置文件

<?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:tx="
http://www.springframework.org/schema/tx
" xmlns:aop="
http://www.springframework.org/schema/aop
"xmlns:context="
http://www.springframework.org/schema/context
" xmlns:jee="
http://www.springframework.org/schema/jee
"xmlns:mvc="
http://www.springframework.org/schema/mvc
"xmlns:p="
http://www.springframework.org/schema/p
" xsi:schemaLocation="
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/jee
http://www.springframework.org/schema/jee/spring-jee-2.5.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
"><!-- 加载配置文件 --><context:property-placeholder location="classpath:config/jdbc.properties" /><context:component-scan base-package="org.base" /><!-- 开启基于注解的mvc配置 --><mvc:annotation-driven><mvc:message-converters><bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"><!-- 解决"IE下返回json提示下载"问题 --><property name="supportedMediaTypes" value="text/plain;charset=UTF-8"></property></bean></mvc:message-converters></mvc:annotation-driven><!-- 视图解析器 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"p:prefix="/WEB-INF/" p:suffix=".jsp"></bean>
</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="
http://java.sun.com/xml/ns/javaee
" xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance
" xsi:schemaLocation="
http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd
"><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list><!-- spring mvc --><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:config/spring.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>*.do</url-pattern></servlet-mapping>
</web-app>

参考：Spring MVC 框架搭建及详解

Spring mvc 返回JSON 在IE 下提示下载 解决办法