第一次使用spring mvc ，在此也算是记录一下以防忘记，希望有经验的朋友指出不足的地方

一、使用maven管理jar。

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1. <dependency>
2. <groupId>org.codehaus.jackson</groupId>
3. <artifactId>jackson-core-lgpl</artifactId>
4. <version>1.9.6</version>
5. </dependency>
6. <dependency>
7. <groupId>org.codehaus.jackson</groupId>
8. <artifactId>jackson-core-asl</artifactId>
9. <version>1.9.4</version>
10. </dependency>
11. <dependency>
12. <groupId>org.codehaus.jackson</groupId>
13. <artifactId>jackson-mapper-asl</artifactId>
14. <version>1.9.5</version>
15. </dependency>
16. <dependency>
17. <groupId>org.codehaus.jackson</groupId>
18. <artifactId>jackson-mapper-lgpl</artifactId>
19. <version>1.9.6</version>
20. </dependency>

<dependency><groupId>org.codehaus.jackson</groupId><artifactId>jackson-core-lgpl</artifactId><version>1.9.6</version>
</dependency>
<dependency><groupId>org.codehaus.jackson</groupId><artifactId>jackson-core-asl</artifactId><version>1.9.4</version>
</dependency>
<dependency><groupId>org.codehaus.jackson</groupId><artifactId>jackson-mapper-asl</artifactId><version>1.9.5</version>
</dependency>
<dependency><groupId>org.codehaus.jackson</groupId><artifactId>jackson-mapper-lgpl</artifactId><version>1.9.6</version>
</dependency>

二、配置spring-servlet.xml:

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1. <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
2. <property name="messageConverters">
3. <list >
4. <ref bean="mappingJacksonHttpMessageConverter" />
5. </list>
6. </property>
7. </bean>

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">    <property name="messageConverters">    <list >    <ref bean="mappingJacksonHttpMessageConverter" />    </list>    </property>    </bean>

mappingJacksonHttpMessageConverter ： 用来处理json格式转换

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1. <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
2. <property name="supportedMediaTypes">
3. <list>
4. <value>application/json;charset=UTF-8</value>
5. </list>
6. </property>
7. </bean>

<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">  <property name="supportedMediaTypes">  <list>  <value>application/json;charset=UTF-8</value>  </list>  </property>
</bean>

1、

如果 mappingJacksonHttpMessageConverter 可以 直接写成如下：

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1. <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />

<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />

这样默认应该是 ：ISO-88859-1

2、

supportedMediaTypes 的 list 里面 可以写多个value

<list>

<value>apolication/json; charset=UTF-8</value>

<value>text/html;charset=UTF-8</value>

</list>

三、controller 配置@ResponseBody

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1. @Controller
2. public class LoginController {
3. @RequestMapping(value="/validataUser.json")
4. @ResponseBody
5. public Map<String,Object> validataUser(@RequestParam String userName){
6. logger.info(" validata user : {}",userName);
7. Map<String,Object> map = new HashMap<String,Object>();
8. map.put("code", true);
9. return map;
10. }
11. }

@Controller
public class LoginController {@RequestMapping(value="/validataUser.json")@ResponseBodypublic Map<String,Object> validataUser(@RequestParam String userName){logger.info(" validata user : {}",userName);Map<String,Object> map = new HashMap<String,Object>();map.put("code", true);return map;}
}

四：页面上仍然按照原来的ajax区json的格式一样、

题外话：

关于 @ResponseBody：

将内容或对象作为 HTTP 响应正文返回，使用@ResponseBody将会跳过视图处理部分，而是调用适合HttpMessageConverter，将返回值写入输出流。