在本示例中，我们将向您展示如何将对象转换成json格式并通过spring mvc框架返回给用户。
使用技术及环境：
- Spring 3.2.2.RELEASE
- Jackson 1.9.10
- JDK 1.6
- Eclipse 3.6
- Maven 3
PS：在spring 3 中，要输出json数据，只需要添加Jackson 库到你的classpath。
1、项目依赖
spring和jackson的依赖：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.mkyong.common</groupId> <artifactId>SpringMVC</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>SpringMVC Json Webapp</name> <url>http://maven.apache.org</url> <properties> <spring.version>3.2.2.RELEASE</spring.version> <jackson.version>1.9.10</jackson.version> <jdk.version>1.6</jdk.version> </properties> <dependencies> <!-- Spring 3 dependencies --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${
spring.version}
</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${
spring.version}
</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${
spring.version}
</version> </dependency> <!-- Jackson JSON Mapper --> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>${
jackson.version}
</version> </dependency> </dependencies> <build> <finalName>SpringMVC</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-eclipse-plugin</artifactId> <version>2.9</version> <configuration> <downloadSources>true</downloadSources> <downloadJavadocs>false</downloadJavadocs> <wtpversion>2.0</wtpversion> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.3.2</version> <configuration> <source>${
jdk.version}
</source> <target>${
jdk.version}
</target> </configuration> </plugin> </plugins> </build></project>
2、Model
一个简单的JavaBean，稍后将被转换成json格式输出。
public class Shop {
String name;
String staffName[];
//getter and setter methods}
3、Controller
添加@ResponseBody到返回值，我们看到：
Jackson 包已经在项目的 classpath
mvc:annotation-driven注解已经启用
返回方法已经添加了@ResponseBody
spring会自动处理json的转换。
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import com.mkyong.common.model.Shop;
[@Controller](https://my.oschina.net/u/1774615)@RequestMapping("/kfc/brands")public class JSONController {
@RequestMapping(value="{
name}
", method = RequestMethod.GET) public @ResponseBody Shop getShopInJSON(@PathVariable String name) {
Shop shop = new Shop();
shop.setName(name);
shop.setStaffName(new String[]{
"mkyong1", "mkyong2"}
);
return shop;
}
}
4、mvc:annotation-driven
在你的spring配置文件中启用mvc:annotation-driven注解。
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <context:component-scan base-package="com.mkyong.common.controller" /> <mvc:annotation-driven /></beans>
5、示例结果
访问URL：http://localhost:8080/SpringMVC/rest/kfc/brands/kfc-kampar
spring-mvc-json-demo
感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！
