原文:http://iwantmoon.com/Post/f94e49caf9b6455db7158474bab4c4dd

因为工作需要,现在要去做开放平台,考虑了多种方案之后,基本确定 下来,Http Api and Web Serivce两种,REST API 就需要通过Spring Mvc输出Json,这里面其实还是有一些工作可以做的,比如大量用户访问的情况下,怎保证性能、保证流量和稳定性。当然本篇我们还是主要讨论如何去实现它。

接下来,大家跟着我做吧。

首先,我们要了解Spring Mvc本身并没有提供JsonView的支持,这里面,我们需要通过Jackson 第三方实现的帮助,实现他。

那么我们要加入依赖引用:

<!-- json -->
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-lgpl</artifactId>
<version>1.8.1</version>
</dependency> <dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-lgpl</artifactId>
<version>1.8.1</version>
</dependency> <dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.1.0</version>
</dependency>

上面是Jackson部分,下面还有spring mvc和其他的部分

        <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>${jsp.version}</version>
<scope>provided</scope>
</dependency>

mvn clean install

经过一段时间的等待,依赖包下载到本地,OK,我们可以开始配置 我们的项目了。

由于本文中心是Spring mvc 输出Json,所以会略过Spring mvc的配置,如果需要,大家可以参考spring.io

下面,我们加入Jaskson的配置:

<bean id="stringConverter" class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/plain;charset=UTF-8</value>
</list>
</property>
</bean> <!-- 输出对象转JSON支持 -->
<bean id="jsonConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="stringConverter"/>
<ref bean="jsonConverter" />
</list>
</property>
</bean>

写一个Sample Controller:

@RestController
public class JsonController extends BaseController {
@RequestMapping(value = "/user", method = RequestMethod.GET)
@JsonView(User.WithoutPasswordView.class)
public User getUser() {
return new User("eric", "7!jd#h23");
}
}
public class User {

    public interface WithoutPasswordView {};
public interface WithPasswordView extends WithoutPasswordView {}; private String username;
private String password; public User() {
} public User(String username, String password) {
this.username = username;
this.password = password;
} @JsonView(WithoutPasswordView.class)
public String getUsername() {
return this.username;
} @JsonView(WithPasswordView.class)
public String getPassword() {
return this.password;
}
}

OK,下面是运行结果:

Spring Mvc 输出Json(iwantmoon.com出品)-LMLPHP

大家有问题,欢迎加入我们敲代码(http://iwantmoon.com)官方QQ群:299388502

05-11 11:16