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第 10 章 RestTemplate - Spring4 Restful

@RestController

目錄

10.1. RestTemplate Example
10.1.1. pom.xml
10.1.2. web.xml
10.1.3. springframework.xml
10.1.4. RestController
10.1.5. POJO
10.1.6. 測試
10.2. String boot with RestTemplate
10.2.1. 在控製器中完整實例
10.3. getForObject
10.3.1. 返回字元串
10.3.2. 傳遞 GET 參數
10.4. postForObject
10.4.1. 傳遞對象
10.4.2. 傳遞資料結構 MultiValueMap
10.5. postForEntity
10.6. PUT
10.7. Delete
10.8. HTTP Auth
10.8.1. Client

首先我要禁告各位,Spring發展過程中,每個版本都有一定差異。如果你做實驗失敗後在網上搜索答案,切記看一下版本號還有文章帖子的發佈時間。否則你可能按照Spring3配置方法去Spring4。

@RestController 預設返回 @ResponseBody, 所以@ResponseBody可加可不加

10.1. RestTemplate Example

10.1.1. pom.xml

Maven 增加 jackson 開發包

			
		<dependency>
			<groupId>com.fasterxml.jackson.dataformat</groupId>
			<artifactId>jackson-dataformat-xml</artifactId>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-core</artifactId>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-annotations</artifactId>
		</dependency>		
			
			

10.1.2. web.xml

url-pattern匹配中增加*.xml跟*.json

			
	<servlet>
        <servlet-name>springframework</servlet-name>
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
   
    <servlet-mapping>
        <servlet-name>springframework</servlet-name>
        <url-pattern>/welcome.jsp</url-pattern>
        <url-pattern>/welcome.html</url-pattern>
        <url-pattern>*.json</url-pattern>
        <url-pattern>*.xml</url-pattern>
        <url-pattern>*.html</url-pattern>
    </servlet-mapping>		
			
			

10.1.3. springframework.xml

			
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:mongo="http://www.springframework.org/schema/data/mongo" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="
        http://www.springframework.org/schema/beans     
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/data/mongo
http://www.springframework.org/schema/data/mongo/spring-mongo-1.5.xsd        
        ">

	<mvc:resources location="/images/" mapping="/images/**" />
	<mvc:resources location="/css/" mapping="/css/**" />
	<mvc:resources location="/js/" mapping="/js/**" />
	<mvc:resources location="/zt/" mapping="/zt/**" />
	<mvc:resources location="/sm/" mapping="/sm/**" />
	<mvc:resources location="/module/" mapping="/module/**" />

	<context:component-scan base-package="cn.netkiller.controller">

	</context:component-scan>
	<context:annotation-config />
	<mvc:annotation-driven />

	<bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
		<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
		<property name="prefix" value="/WEB-INF/jsp/" />
		<property name="suffix" value=".jsp" />
	</bean>


	<bean id="configuracion" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="location" value="classpath:resources/development.properties" />
	</bean>

	<!-- Redis Connection Factory -->
	<bean id="jedisConnFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" p:host-name="192.168.2.1" p:port="6379" p:use-pool="true" />

	<!-- redis template definition -->
	<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate" p:connection-factory-ref="jedisConnFactory" />

	<mongo:db-factory id="mongoDbFactory" host="${mongo.host}" port="${mongo.port}" dbname="${mongo.database}" />
	<!-- username="${mongo.username}" password="${mongo.password}" -->

	<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
		<constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
	</bean>

	<mongo:mapping-converter id="converter" db-factory-ref="mongoDbFactory" />
	<bean id="gridFsTemplate" class="org.springframework.data.mongodb.gridfs.GridFsTemplate">
		<constructor-arg ref="mongoDbFactory" />
		<constructor-arg ref="converter" />
	</bean>

</beans>
			
			

10.1.4. RestController

			
package cn.netkiller.controller;

import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ResponseBody;

import cn.netkiller.pojo.Message;

@RestController
@RequestMapping("/rest")
public class TestRestController {

	public TrackerRestController() {
		// TODO Auto-generated constructor stub
	}

	@RequestMapping("welcome")
	@ResponseStatus(HttpStatus.OK)
	public String welcome() {
		return "Welcome to RestTemplate Example.";
	}

	@RequestMapping(value = "test", method = RequestMethod.GET, produces = { "application/xml", "application/json" })
	@ResponseStatus(HttpStatus.OK)
	public @ResponseBody Message test(@RequestHeader(value = "accept") String accept) {
		Message message = new Message();
		message.setTitle("test");
		message.setText("Helloworld!!!");
		System.out.println("accept: " + accept);
		System.out.println(message.toString());
		return message;
	}

	@RequestMapping("message/{name}")
	public ResponseEntity<Message> message(@PathVariable String name) {
		Message msg = new Message();
		msg.setTitle(name);
		return new ResponseEntity<Message>(msg, HttpStatus.OK);
	}
	
	@RequestMapping(value = "create", method = RequestMethod.POST, produces = { "application/xml", "application/json" })
	public ResponseEntity<Tracker> create(@RequestBody Tracker tracker) {
		this.mongoTemplate.insert(tracker);
		return new ResponseEntity<Tracker>(tracker, HttpStatus.OK);
	}
	
	@RequestMapping(value = "read", method = RequestMethod.GET, produces = { "application/xml", "application/json" })
	@ResponseStatus(HttpStatus.OK)
	public ArrayList<Tracker> read() {

		ArrayList<Tracker> trackers =  (ArrayList<Tracker>) mongoTemplate.findAll(Tracker.class);
		return trackers;
	}	
}
			
			

10.1.5. POJO

			
package cn.netkiller.pojo;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Message {
	
	String title;
    String text;
    
	public Message() {
		// TODO Auto-generated constructor stub
	}
	
	//@XmlElement
	@XmlAttribute  
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	
	//@XmlElement
	@XmlAttribute
	public String getText() {
		return text;
	}
	public void setText(String text) {
		this.text = text;
	}
	@Override
	public String toString() {
		return "Message [title=" + title + ", text=" + text + "]";
	}

}
			
			

10.1.6. 測試

			
neo@netkiller:~/www.netkiller.cn$ curl http://172.16.0.1:8080/spring4/rest/welcome.html
Welcome to RestTemplate Example.

neo@netkiller:~/www.netkiller.cn$ curl http://172.16.0.1:8080/spring4/rest/test.json
{"title":"test","text":"Helloworld!!!"}

neo@netkiller:~/www.netkiller.cn$ curl http://172.16.0.1:8080/spring4/rest/test.xml
<Message xmlns=""><title>test</title><text>Helloworld!!!</text></Message>	

neo@netkiller:~/www.netkiller.cn$ curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X POST -d '{"login":"neo", "unique":"356770257607079474","hostname":"www.example.com","referrer":"http://www.netkiller.cn","href":"http://www.netkiller.cn"}' http://172.16.0.1:8080/spring4/rest/create.json
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Content-Type: application/json
Transfer-Encoding: chunked
Date: Tue, 21 Jun 2016 03:08:26 GMT

{"name":"neo","unique":"356770257607079474","hostname":"www.netkiller.cn","referrer":"http://www.netkiller.cn","href":"http://www.netkiller.cn"}