Sping3 MVC JSON 例子

1、引入下面兩個jar包，我用的是1.8.10，好像1.4.2版本以上都可以，下載地址：http://wiki.fasterxml.com/JacksonDownload

jackson-core-asl-1.8.10.jar

jackson-mapper-asl-1.8.10.jar

同時引入Sping 本身的jar包：

org.springframework.asm-3.1.1.RELEASE.jar
org.springframework.beans-3.1.1.RELEASE.jar
org.springframework.context-3.1.1.RELEASE.jar
org.springframework.core-3.1.1.RELEASE.jar
org.springframework.expression-3.1.1.RELEASE.jar
org.springframework.web-3.1.1.RELEASE.jar

2、Sping配置文件

web.xml

1. <servlet>
2. <servlet-name>dispatchServlet</servlet-name>
3. <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
4. <init-param>
5. <param-name>contextConfigLocation</param-name>
6. <param-value>/WEB-INF/servlet-config.xml</param-value>
7. </init-param>
8. <load-on-startup>1</load-on-startup>
9. </servlet>
11. <servlet-mapping>
12. <servlet-name>dispatchServlet</servlet-name>
13. <url-pattern>*.do</url-pattern>
14. </servlet-mapping>

servlet-config.xml:

1. <?xmlversion="1.0"encoding="UTF-8"?>
2. <beansxmlns="http://www.springframework.org/schema/beans"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4. xmlns:p="http://www.springframework.org/schema/p"
5. xmlns:context="http://www.springframework.org/schema/context"
6. xmlns:tx="http://www.springframework.org/schema/tx"
7. xmlns:mvc="http://www.springframework.org/schema/mvc"
8. xsi:schemaLocation="http://www.springframework.org/schema/beans
9. http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
10. http://www.springframework.org/schema/context
11. http://www.springframework.org/schema/context/spring-context-3.0.xsd
12. http://www.springframework.org/schema/mvc
13. http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
15. <!-- 自動掃描bean，把作了注解的類轉換為bean -->
16. <context:component-scanbase-package="com.report.controller"/>
18. <!-- 默認的注解映射的支持 -->
19. <mvc:annotation-driven/>
20. <!-- 支持JSON數據格式 -->
21. <beanclass="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
22. <beanclass="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
23. <propertyname="messageConverters">
24. <list>
25. <beanclass="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
26. <propertyname="supportedMediaTypes">
27. <list>
28. <value>text/html;charset=UTF-8</value>
29. </list>
30. </property>
31. </bean>
32. </list>
33. </property>
34. </bean>
36. <!-- 聲明viewResolver -->
37. <beanid="viewResolver"class="org.springframework.web.servlet.view.InternalResourceViewResolver">
38. <propertyname="prefix"value="/"/>
39. <propertyname="suffix"value=".html"/>
40. </bean>
43. </beans>

接著，我們再定義一個java類：

1. import java.util.HashMap;
2. import java.util.Map;
4. import org.springframework.stereotype.Controller;
5. import org.springframework.ui.Model;
6. import org.springframework.web.bind.annotation.RequestMapping;
7. import org.springframework.web.bind.annotation.RequestMethod;
8. import org.springframework.web.bind.annotation.ResponseBody;
10. @Controller
11. publicclass KeywordInfoController {
14. @RequestMapping(value="getKeywordExportPVData.do", method=RequestMethod.POST)
15. @ResponseBody
16. public Object getKeywordExportPVInfo(){
17. String s = "hellowold";
18. return s;
19. }
20. }

然後我們在頁面調用url即可。