spring 4 @RestController 小试

在建立好基本的spring框架后，可以尝试实现一下简单的rest风格请求

1、需要引入的包，部分pom.xml文件

<dependency>

            <groupId>org.codehaus.jackson</groupId>

            <artifactId>jackson-mapper-asl</artifactId>

            <version>1.9.13</version>

        </dependency>

        <dependency>

            <groupId>com.fasterxml.jackson.core</groupId>

            <artifactId>jackson-core</artifactId>

            <version>2.5.1</version>

        </dependency>

        <dependency>

            <groupId>com.fasterxml.jackson.core</groupId>

            <artifactId>jackson-databind</artifactId>

            <version>2.5.1</version>

        </dependency>

 

2、dispatcher-servlet.xml配置

<?xml version="1.0" encoding="GBK"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"

    xmlns:jee="http://www.springframework.org/schema/jee" xmlns:context="http://www.springframework.org/schema/context"

    xmlns:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc"

    xmlns:util="http://www.springframework.org/schema/util"

    xsi:schemaLocation="http://www.springframework.org/schema/beans 

                        http://www.springframework.org/schema/beans/spring-beans-4.1.xsd

                        http://www.springframework.org/schema/context 

                        http://www.springframework.org/schema/context/spring-context-4.1.xsd

                        http://www.springframework.org/schema/tx

                        http://www.springframework.org/schema/tx/spring-tx-4.1.xsd

                        http://www.springframework.org/schema/jee 

                        http://www.springframework.org/schema/jee/spring-jee-4.1.xsd

                        http://www.springframework.org/schema/mvc

                        http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd

                        http://www.springframework.org/schema/util  

                        http://www.springframework.org/schema/util/spring-util-4.1.xsd">

    <mvc:annotation-driven />

    <context:annotation-config />

    <context:component-scan base-package="com.zf" />

</beans>

3、创建controller

package com.zf.controller;



import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;



import com.zf.po.Message;

import com.zf.po.ServiceType;



@RestController

@RequestMapping(value="/ajax")

public class AjaxController {



    @RequestMapping(value="/json")

    public ServiceType jsonAction(){

        ServiceType st=new ServiceType();

        st.setId(1);

        st.setName("ServiceType没有使用xml相关注解，无论是否使用.json后缀，均返回json格式");

        st.setPriority(3);

        return st;

    }

    @RequestMapping(value="/html")

    public String htmlAction(){

        return "直接返回字符串，则视图一般html";

    }

    

    @RequestMapping(value="/xml")

    public Message xmlAction(){

        Message st=new Message();

        st.setText("无需带后缀，返回XML结构");

        st.setName("XML");

        return st;

    }

    @RequestMapping(value="/xml.json")

    public Message xmlJsonAction(){

        Message st=new Message();

        st.setText("message使用了xml相关的注解，使用.json后缀访问，仍返回json数据");

        st.setName("json");

        return st;

    }

}

 

4、两个简单类

Message.java

package com.zf.po;



import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;



@XmlRootElement(name="root")

public class Message {

    String name;

    String text;

    @XmlElement

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    @XmlElement

    public String getText() {

        return text;

    }

    public void setText(String text) {

        this.text = text;

    }

}

ServiceType.java

package com.zf.po;



import java.io.Serializable;



public class ServiceType implements Serializable, Cloneable {



    private static final long serialVersionUID = 1L;

    private int id;

    private String name;

    private int priority;



    public int getId() {

        return id;

    }



    public void setId(int id) {

        this.id = id;

    }



    public String getName() {

        return name;

    }



    public void setName(String name) {

        this.name = name;

    }



    public int getPriority() {

        return priority;

    }



    public void setPriority(int priority) {

        this.priority = priority;

    }



}

5、启动tomcat后，可以尝试访问以下地址

http://localhost:8080/study/ajax/html

http://localhost:8080/study/ajax/json

http://localhost:8080/study/ajax/xml.json

http://localhost:8080/study/ajax/xml