springmvc 使用

 

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";
 }
 /**
  * 若是方法无返回值，则跳转到 testP.jsp页面，即映射名
  * 对于方法中的参数，能够对应url中的参数自动赋值
  * 这里注意，若是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);
 }
 
 /**
  * 也能够显式声明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")
 @ResponseBody
 public Department test2(){
  Department dept = new Department(12, "abc", 31, 5);
  return dept;
 } 
 //@RequestMapping 注解的方法支持不少参数： HttpServletRequest/Response,HttpSession,Writer
 // 不支持对象.属性传值方法，若是重名，/**
  * 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 能够将该方法返回的值 写入到 response的body中去(String,json,xml)。

@RequestMapping 也能够用于整个类

@Controller
@RequestMapping("/emp/*")
public class EmpController {

 @RequestMapping("test1") // 这里匹配的url就是/emp/test1.do
 public 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