Tags: springmvc
This article mainly describes how to interact with JSON data in SPRINGMVC. First environment preparation and configuration, and then show "input JSON string, output is JSON string" and "input key/value, output is JSON string" Two cases of interaction
SPRINGMVC for JSON interactionJSON data formats are used more frequently in interface calls and in HTML pages. The JSON format is simpler and more convenient to parse.
Analogy: WebService interface. Transmits JSON data.
At the beginning I was less jackson-databind dependent, the program various error.
<!--JSON conversion --<dependency> <groupId>Com.fasterxml.jackson.core</groupId> <artifactid>Jackson-databind</artifactid> <version>2.7.2</version></Dependency><dependency> <groupId>Org.codehaus.jackson</groupId> <artifactid>Jackson-mapper-asl</artifactid> <version>1.9.13</version></Dependency>Viewing a dependency tree
[INFO] +-com. Fasterxml. Jackson. Core: Jackson-databind:jar:2.7. 2: Compile[info] | +-com. Fasterxml. Jackson. Core: Jackson-annotations:jar:2.7. 0: Compile[info] | \-com. Fasterxml. Jackson. Core: Jackson-core:jar:2.7. 2: compile[info] \-org. Codehaus. Jackson: Jackson-mapper-asl:jar:1.9.: compile[info] \-org. Codehaus. Jackson: Jackson-core-asl:jar:1.9.: CompileAdding in the annotation adaptermessageConverters
<!--Note Adapter --<Bean class=" Org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter "> < property name="Messageconverters"> <list> <Bean class=" Org.springframework.http.converter.json.MappingJacksonHttpMessageConverter "></Bean> </list> </Property ></Bean>Note: It is assumed that the <mvc:annotation-driven /> above content is not defined.
Show two buttons to test separately
<%--Created by IntelliJ idea. User:brian Date: 3/7time: £ º To change this template use File | Settings | File templates.--%> <%@ page contenttype="Text/html;charset=utf-8" language="java" %><html><head> <meta http-equiv="Content-type" Content="text/html; Charset=utf-8 "> <title>JSON Interactive test</title> <script type="text/javascript" src="${ PageContext.request.contextPath}/js/jquery-1.4.4.min.js "></script> <script type="Text/javascript"> //Request JSON, output is JSONfunction requestjson(){ omitted} //Request Key/va Lue Output is JSONfunction responsejson(){ omitted} </script></head><body><input type="button" onclick="Requestjson ()" value= "Request json. The output is JSON "/><input type="button" onclick="Responsejson ()" Value="Request Key/value, Output is json"/></body>@Controllerpublicclass JsonTest { 省略}
Use jquery's AJAX submission JSON string to parse the output JSON results.
//request JSON, output is JSON function Requestjson () { $.ajax ({type: ' post ' , Url: ' ${pagecontext.request.contextpath}/requestjson.action ' , ContentT Ype: ' application/json;charset=utf-8 ' , //data format is a JSON string, Product information data: ' {" name phone ", " price": 999} ' , Success:function {//return json result alert (data); } });}
//请求json串(商品信息)，输出json(商品信息)//@RequestBody将请求的商品信息的json串转成itemsCustom对象//@ResponseBody将itemsCustom转成json输出@RequestMapping("/requestJson")publicrequestJson(@RequestBody ItemsCustom itemsCustom){ //@ResponseBody将itemsCustom转成json输出 return itemsCustom;}
Can see that the HTTP header of request and response is Content-typeapplication/json;charset=utf-8
Using jquery's Ajax to commit key/value strings, parsing the output JSON results
//request Key/value, The output is JSON function Responsejson () { $.ajax ({type: ' post ' , Url: ' ${pagecontext.request.contextpath}/responsejson.action ' , //request is key/value there is no need to specify ContentType, because the default is the Key/value type // ContentType: ' Application/json;charset=utf-8 ', //data format is a JSON string. Product information data: ' name= phone &price=999 ' , Success:function { //returns the JSON result alert (data.name); } });}
//请求key/value，输出json@RequestMapping("/responseJson")publicresponseJson(ItemsCustom itemsCustom){ //@ResponseBody将itemsCustom转成json输出 return itemsCustom;}
Can see. The default content-type for Key/value key-value pairs is, at the application/x-www-form-urlencoded same time. We received a response to "phone"
Author @brianway Many other articles: personal site
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SPRINGMVC Study Notes (-json) data interaction
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