Spring MVC returns JSON format-Long-Blog channel-csdn.net

The first time you use Spring MVC, this is also a record in case you forget, I hope experienced friends point out the inadequacy of the place

First, use Maven to manage jars.

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2. < Dependency >   
4. < groupId > Org.codehaus.jackson </ groupId >   
6. < Artifactid > JACKSON-CORE-LGPL </ Artifactid >   
8. < version > 1.9.6 </ version >   
10. </ Dependency >   
12. < Dependency >   
14. < groupId > Org.codehaus.jackson </ groupId >   
16. < Artifactid > JACKSON-CORE-ASL </ Artifactid >   
18. < version > 1.9.4 </ version >   
20. </ Dependency >   
22. < Dependency >   
24. < groupId > Org.codehaus.jackson </ groupId >   
26. < Artifactid > JACKSON-MAPPER-ASL </ Artifactid >   
28. < version > 1.9.5 </ version >   
30. </ Dependency >   
32. < Dependency >   
34. < groupId > Org.codehaus.jackson </ groupId >   
36. < Artifactid > JACKSON-MAPPER-LGPL </ Artifactid >   
38. < version > 1.9.6 </ version >   
40. </ 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>

Second, the configuration spring-servlet.xml:

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2. < Bean class=" Org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter ">
4. < Property name="messageconverters">
6. < List >
8. < ref bean="mappingjacksonhttpmessageconverter" />
10. </ List >       
12. </ Property >       
14. </ Bean >   

<bean class= "Org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" >    < Property name= "Messageconverters" >    <list >    <ref bean= "Mappingjacksonhttpmessageconverter"/ >    </list>    </property>    </bean>

Mappingjacksonhttpmessageconverter: Used to handle JSON format conversions

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2. < Bean id="mappingjacksonhttpmessageconverter" class= "Org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" >     
4. < Property name="supportedmediatypes">
6. < List >     
8. < value > Application/json; CharSet = UTF -8 </ value >     
10. </ List >     
12. </ Property >   
14. </ 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.

If Mappingjacksonhttpmessageconverter can be directly written as follows:

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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 "/>  

This should be the default:iso-88859-1

2.

Supportedmediatypes can write multiple value in the list

<list>

<value>apolication/json; Charset=utf-8</value>

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

</list>

Third, controller configuration @ResponseBody

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2. @Controller   
4. Public class Logincontroller {
6. @RequestMapping (value="/validatauser.json")
8. @ResponseBody   
10. Public map<string,object> validatauser (@RequestParam String userName) {
12. Logger.info ("Validata User: {}", UserName);
14. map<string,object> map = new hashmap<string,object> ();
16. Map.put ("code", true);
18. return  map;
20. }
22. }

@Controllerpublic 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;}}

Four: The page still follows the same format as the original Ajax area JSON,

Off Topic:

About @ResponseBody:

Returns the content or object as the HTTP response body, using @responsebody to skip the view processing part, instead calling the appropriate httpmessageconverter and writing the return value to the output stream.

From for notes (Wiz)

Spring MVC returns JSON format-Long-Blog channel-csdn.net