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

Jersey GET POST PUT DELETE

Project Directory

Maven Dependency

web.xml

JsonUtils.java

ActionResponse.java

BlogPostRequest.java

BlogPostResponse.java

BlogService.java

Test

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