Jersey GET POST PUT DELETE

原创转载请注明出处：http://agilestyle.iteye.com/blog/2322905

 

Project Directory

 

Maven Dependency

<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>org.fool.jersey</groupId>
	<artifactId>jersey</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>jersey Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<dependencies>
		<dependency>
			<groupId>org.glassfish.jersey.core</groupId>
			<artifactId>jersey-server</artifactId>
			<version>2.23.2</version>
		</dependency>

		<dependency>
			<groupId>org.glassfish.jersey.containers</groupId>
			<artifactId>jersey-container-servlet</artifactId>
			<version>2.23.2</version>
		</dependency>

		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.8.2</version>
		</dependency>

		<dependency>
			<groupId>com.google.guava</groupId>
			<artifactId>guava</artifactId>
			<version>19.0</version>
		</dependency>
	</dependencies>

	<build>
		<finalName>jersey</finalName>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.5.1</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
				</configuration>
			</plugin>

			<plugin>
				<groupId>org.eclipse.jetty</groupId>
				<artifactId>jetty-maven-plugin</artifactId>
				<version>9.3.11.v20160721</version>
				<configuration>
					<scanIntervalSeconds>10</scanIntervalSeconds>
					<httpConnector>
						<port>8888</port>
					</httpConnector>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

 

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
	id="WebApp_ID" version="3.0">

	<display-name>jersey</display-name>

	<servlet>
		<servlet-name>jerseyservlet</servlet-name>
		<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
		<init-param>
			<param-name>jersey.config.server.provider.packages</param-name>
			<param-value>org.fool.jersey</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>jerseyservlet</servlet-name>
		<url-pattern>/rest/*</url-pattern>
	</servlet-mapping>
</web-app>

 

JsonUtils.java

package org.fool.jersey.util;

import java.util.List;
import java.util.Map;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JsonUtils {
	private static final ObjectMapper MAPPER = new ObjectMapper();

	public static String objectToJson(Object data) {
		try {
			String string = MAPPER.writeValueAsString(data);
			return string;
		} catch (JsonProcessingException e) {
			e.printStackTrace();
		}
		
		return null;
	}

	public static <T> T jsonToPojo(String jsonData, Class<T> beanType) {
		try {
			T t = MAPPER.readValue(jsonData, beanType);
			return t;
		} catch (Exception e) {
			e.printStackTrace();
		}

		return null;
	}

	public static <T> List<T> jsonToList(String jsonData, Class<T> beanType) {
		JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);

		try {
			List<T> list = MAPPER.readValue(jsonData, javaType);
			return list;
		} catch (Exception e) {
			e.printStackTrace();
		}

		return null;
	}

	public static <K, V> Map<K, V> jsonToMap(String jsonData, Class<K> keyType, Class<V> valueType) {
		JavaType javaType = MAPPER.getTypeFactory().constructMapType(Map.class, keyType, valueType);

		try {
			Map<K, V> map = MAPPER.readValue(jsonData, javaType);
			return map;
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		return null;
	}
}

 

ActionResponse.java

package org.fool.jersey.blog;

/*
 * to demonstrate the DELETE method
 */
public class ActionResponse {
	private String actionStatus;
	private String additionalMessage;

	public String getActionStatus() {
		return actionStatus;
	}

	public void setActionStatus(String actionStatus) {
		this.actionStatus = actionStatus;
	}

	public String getAdditionalMessage() {
		return additionalMessage;
	}

	public void setAdditionalMessage(String additionalMessage) {
		this.additionalMessage = additionalMessage;
	}

}

 

BlogPostRequest.java

package org.fool.jersey.blog;

/*
 * to demonstrate the POST and PUT method
 */
public class BlogPostRequest {
	private String postTitle;
	private String postContent;
	private String author;

	public String getPostTitle() {
		return postTitle;
	}

	public void setPostTitle(String postTitle) {
		this.postTitle = postTitle;
	}

	public String getPostContent() {
		return postContent;
	}

	public void setPostContent(String postContent) {
		this.postContent = postContent;
	}

	public String getAuthor() {
		return author;
	}

	public void setAuthor(String author) {
		this.author = author;
	}

}

 

BlogPostResponse.java

package org.fool.jersey.blog;

import java.util.List;

import com.google.common.collect.Lists;

/*
 * to demonstrate the GET method
 */
public class BlogPostResponse {
	private String postName;
	private String postTitle;
	private String postContent;
	private String author;
	private String dateValue;
	private String blogCategory;
	private List<String> blogKeywords;

	public BlogPostResponse() {
		blogKeywords = Lists.newArrayList();
	}

	public String getPostName() {
		return postName;
	}

	public void setPostName(String postName) {
		this.postName = postName;
	}

	public String getPostTitle() {
		return postTitle;
	}

	public void setPostTitle(String postTitle) {
		this.postTitle = postTitle;
	}

	public String getPostContent() {
		return postContent;
	}

	public void setPostContent(String postContent) {
		this.postContent = postContent;
	}

	public String getAuthor() {
		return author;
	}

	public void setAuthor(String author) {
		this.author = author;
	}

	public String getDateValue() {
		return dateValue;
	}

	public void setDateValue(String dateValue) {
		this.dateValue = dateValue;
	}

	public String getBlogCategory() {
		return blogCategory;
	}

	public void setBlogCategory(String blogCategory) {
		this.blogCategory = blogCategory;
	}

	public List<String> getBlogKeywords() {
		return blogKeywords;
	}

	public void setBlogKeywords(List<String> blogKeywords) {
		this.blogKeywords = blogKeywords;
	}

}

 

BlogService.java

package org.fool.jersey.blog;

import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;

import org.fool.jersey.util.JsonUtils;

@Path("/blog")
public class BlogService {

	@Path("/{year}/{month}/{day}/{postName}")
	@GET
	public String getBlogDetail(
			@PathParam("year") int year, 
			@PathParam("month") int month, 
			@PathParam("day") int day, 
			@PathParam("postName") String postName) {
		BlogPostResponse bpr = new BlogPostResponse();
		bpr.setPostName(postName);
		bpr.setAuthor("Mr Big");
		bpr.setBlogCategory("My Favorite");
		bpr.setDateValue(String.format("%d/%d/%d", month, day, year));
		bpr.setPostContent("Jesey, so fucking awesome, why do you still use spring mvc?");
		bpr.setPostTitle("My very first blog post. Hello world!");
		bpr.getBlogKeywords().add("hello");
		bpr.getBlogKeywords().add("world");
		bpr.getBlogKeywords().add("first post");
		bpr.getBlogKeywords().add("awesome");

		String result = JsonUtils.objectToJson(bpr);

		return result;
	}

	@Path("/{year}/{month}/{day}/{postName}")
	@DELETE
	public String deleteBlogPost(
			@PathParam("year") int year, 
			@PathParam("month") int month, 
			@PathParam("day") int day, 
			@PathParam("postName") String postName) {
		ActionResponse ar = new ActionResponse();
		ar.setActionStatus("Successfully");
		ar.setAdditionalMessage(String.format("Blog post [%s] created on [%d/%d/%d] was deleted. Operation is successful.", postName, month, day, year));

		String result = JsonUtils.objectToJson(ar);
		
		return result;
	}
	
	@Path("/{year}/{month}/{day}/{postName}")
	@POST
	@Consumes("text/plain")
	public String createNewBlogPost(
			@PathParam("year") int year, 
			@PathParam("month") int month, 
			@PathParam("day") int day, 
			@PathParam("postName") String postName,
			String requestBody) {
		BlogPostRequest request = JsonUtils.jsonToPojo(requestBody, BlogPostRequest.class);

		System.out.println(request.getAuthor());
		System.out.println(request.getPostTitle());
		System.out.println(request.getPostContent());

		BlogPostResponse response = new BlogPostResponse();
		response.setAuthor(request.getAuthor());
		response.setBlogCategory("[no category]");
		response.setDateValue(String.format("%d/%d/%d", month, day, year));
		response.setPostContent(request.getPostContent());
		response.setPostName(postName);
		response.setPostTitle(request.getPostTitle());

		String result = JsonUtils.objectToJson(response);

		return result;
	}
	
	@Path("/{year}/{month}/{day}/{postName}")
	@PUT
	@Consumes("text/plain")
	public String updateBlogPost(@PathParam("year") int year, 
			@PathParam("month") int month, 
			@PathParam("day") int day, 
			@PathParam("postName") String postName,
			String requestBody) {
		BlogPostRequest request = JsonUtils.jsonToPojo(requestBody, BlogPostRequest.class);

		System.out.println(request.getAuthor());
		System.out.println(request.getPostTitle());
		System.out.println(request.getPostContent());
		
		ActionResponse response = new ActionResponse();
		response.setActionStatus("Successful");
		response.setAdditionalMessage(String.format("Blog post [%s] created on [%d/%d/%d] was updated. Operation is successful.", postName, month, day, year));
		
		String result = JsonUtils.objectToJson(response);

		return result;
	}
}

  

Test

GET

 

DELETE

 

POST

 

PUT

 
参考资料：《RESTFul Web Service Development with Jersey 2.x》—— Han Bo Sun