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  • 【Jersey】基于Jersey构建Restful Web应用




    环境说明

    • java: 1.6；
    • tomcat: 6.0.48；
    • Jersey：1.18；

    Jersey介绍

    主要用于构建基于Restful的Web程序；

    构建基于Maven的Javaweb程序


    说明：
    Javaweb项目是作为maven模块项目进行创建的，这里仅给出相应的pom文件，具体的创建过程可google搜索；
    Javaweb引用了Dependencies模块（该模块主要负责引入各种maven的Jar）
    项目结构图：

    主项目pom：

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    3. 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    4. 	<modelVersion>4.0.0</modelVersion>
    6. 	<groupId>com.ll</groupId>
    7. 	<artifactId>MyStudyProject</artifactId>
    8. 	<version>1.0.0</version>
    9. 	<packaging>pom</packaging>
    11. 	<distributionManagement>
    12. 		<site>
    13. 			<id>website</id>
    14. 			<url>scp://webhost.company.com/www/website</url>
    15. 		</site>
    16. 	</distributionManagement>
    18. 	<properties>
    19. 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    20. 	</properties>
    22. 	<modules>
    23. 		<module>MapReduce</module>
    24. 		<module>Lucene</module>
    25. 		<module>Dependencies</module>
    26. 		<module>DesignPattern</module>
    27. 		<module>Javaweb</module>
    28. 	</modules>
    30. </project>

    Javaweb模块pom

    Maven依赖

    Spring相关Jar

    1. <properties>
    2. 	<springVersion>3.2.13.RELEASE</springVersion>
    3. </properties>
    5. <!-- Spring start -->
    6. <dependency>
    7. 	<groupId>org.springframework</groupId>
    8. 	<artifactId>spring-aop</artifactId>
    9. 	<version>${springVersion}</version>
    10. </dependency>
    11. <dependency>
    12. 	<groupId>org.springframework</groupId>
    13. 	<artifactId>spring-aspects</artifactId>
    14. 	<version>${springVersion}</version>
    15. </dependency>
    16. <dependency>
    17. 	<groupId>org.springframework</groupId>
    18. 	<artifactId>spring-beans</artifactId>
    19. 	<version>${springVersion}</version>
    20. </dependency>
    21. <dependency>
    22. 	<groupId>org.springframework</groupId>
    23. 	<artifactId>spring-context</artifactId>
    24. 	<version>${springVersion}</version>
    25. </dependency>
    26. <dependency>
    27. 	<groupId>org.springframework</groupId>
    28. 	<artifactId>spring-context-support</artifactId>
    29. 	<version>${springVersion}</version>
    30. </dependency>
    31. <dependency>
    32. 	<groupId>org.springframework</groupId>
    33. 	<artifactId>spring-core</artifactId>
    34. 	<version>${springVersion}</version>
    35. </dependency>
    36. <dependency>
    37. 	<groupId>org.springframework</groupId>
    38. 	<artifactId>spring-jdbc</artifactId>
    39. 	<version>${springVersion}</version>
    40. </dependency>
    41. <dependency>
    42. 	<groupId>org.springframework</groupId>
    43. 	<artifactId>spring-orm</artifactId>
    44. 	<version>${springVersion}</version>
    45. </dependency>
    46. <dependency>
    47. 	<groupId>org.springframework</groupId>
    48. 	<artifactId>spring-tx</artifactId>
    49. 	<version>${springVersion}</version>
    50. </dependency>
    51. <dependency>
    52. 	<groupId>org.springframework</groupId>
    53. 	<artifactId>spring-jms</artifactId>
    54. 	<version>${springVersion}</version>
    55. </dependency
    56. <dependency>
    57. 	<groupId>org.springframework</groupId>
    58. 	<artifactId>spring-web</artifactId>
    59. 	<version>${springVersion}</version>
    60. </dependency
    61. <dependency>
    62. 	<groupId>org.springframework</groupId>
    63. 	<artifactId>spring-webmvc</artifactId>
    64. 	<version>${springVersion}</version>
    65. </dependency>
    67. <dependency>
    68. 	<groupId>org.springframework</groupId>
    69. 	<artifactId>spring-test</artifactId>
    70. 	<version>${springVersion}</version>
    71. 	<type>jar</type>
    72. 	<scope>compile</scope>
    73. </dependency>
    74. <!-- spring end -->

    Jersey相关Jar

    1. <properties>
    2. 	<Dependency.version>1.0.0</Dependency.version>
    3. 	<Jersey.version>1.18</Jersey.version>
    4. </properties>
    7. <!-- Jersey start -->
    8. <dependency>
    9. 	<groupId>com.sun.jersey</groupId>
    10. 	<artifactId>jersey-server</artifactId>
    11. 	<version>${Jersey.version}</version>
    12. </dependency>
    13. <dependency>
    14. 	<groupId>com.sun.jersey</groupId>
    15. 	<artifactId>jersey-json</artifactId>
    16. 	<version>${Jersey.version}</version>
    17. </dependency>
    18. <dependency>
    19. 	<groupId>com.sun.jersey</groupId>
    20. 	<artifactId>jersey-client</artifactId>
    21. 	<version>${Jersey.version}</version>
    22. </dependency>
    23. <dependency>
    24. 	<groupId>com.sun.jersey.contribs</groupId>
    25. 	<artifactId>jersey-spring</artifactId>
    26. 	<version>${Jersey.version}</version>
    27. 	<exclusions>
    28. 		<exclusion>
    29. 			<groupId>org.springframework</groupId>
    30. 			<artifactId>spring</artifactId>
    31. 		</exclusion>
    32. 		<exclusion>
    33. 			<groupId>org.springframework</groupId>
    34. 			<artifactId>spring-core</artifactId>
    35. 		</exclusion>
    36. 		<exclusion>
    37. 			<groupId>org.springframework</groupId>
    38. 			<artifactId>spring-beans</artifactId>
    39. 		</exclusion>
    40. 		<exclusion>
    41. 			<groupId>org.springframework</groupId>
    42. 			<artifactId>spring-web</artifactId>
    43. 		</exclusion>
    44. 		<exclusion>
    45. 			<groupId>org.springframework</groupId>
    46. 			<artifactId>spring-context</artifactId>
    47. 		</exclusion>
    48. 		<exclusion>
    49. 			<groupId>org.springframework</groupId>
    50. 			<artifactId>spring-aop</artifactId>
    51. 		</exclusion>
    52. 	</exclusions>
    53. </dependency>
    54. <!-- Jersey end -->
    说明：
    因为jersey-spring.jar依赖spring包，而项目中其他模块也使用了通用的Spring模块，所以为避免jar包冲突，这里使用<exclusion>标签将spring相关jar包过滤掉；

    Web.xml

    配置Spring相关属性

    这里没用到，可以不进行配置；
    1. <!--Spring 文件路径 -->
    2. <context-param>
    3. 	<param-name>contextConfigLocation</param-name>
    4. 	<param-value>classpath:conf/beans/beans-*.xml</param-value>
    5. </context-param>
    6. <!-- spring上下文监听器 -->
    7. <listener>
    8. 	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    9. </listener>
    10. <listener>
    11. 	<listener-class>org.springframework.web.context.request.RequestContextListener<listener-class>
    12. </listener>

    Jersey配置Servlet

    1. <!-- jersey Servlet -->
    2. <servlet>
    3. 	<servlet-name>rest-inside</servlet-name>
    4. 	<servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>
    5. 	<init-param>
    6. 		<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
    7. 		<param-value>true</param-value>
    8. 	</init-param>
    9. 	<init-param>
    10.            <param-name>com.sun.jersey.config.property.packages</param-name>
    11.            <param-value>com.ll.rest</param-value>
    12.        </init-param>
    13. 	<load-on-startup>1</load-on-startup>
    14. </servlet>
    15. <servlet-mapping>
    16. 	<servlet-name>rest-inside</servlet-name>
    17. 	<url-pattern>/i/rest/*</url-pattern>
    18. </servlet-mapping>
    配置说明：
    • 使用SpringServlet；
    • POJOMappingFeature： 用于Json和Pojo对象的转换；
    • com.sun.jersey.config.property.packages： 代表服务器端路径；

    完整的Web.xml

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    3. 	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    4. 	version="2.4">
    5. 	<display-name>Java Web</display-name>
    6. 	<welcome-file-list>
    7. 		<welcome-file>index.jsp</welcome-file>
    8. 	</welcome-file-list>
    10. 	<!--Spring 文件路径 -->
    11. 	<context-param>
    12. 		<param-name>contextConfigLocation</param-name>
    13. 		<param-value>classpath:conf/beans/beans-*.xml</param-value>
    14. 	</context-param>
    16. 	<!-- spring上下文监听器 -->
    17. 	<listener>
    18. 		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    19. 	</listener>
    20. 	<listener>
    21. 		<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    22. 	</listener>
    24. 	<!-- 解决中文乱码 -->
    25. 	<filter>
    26. 		<filter-name>SetCharacterEncoding</filter-name>
    27. 		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    28. 		<init-param>
    29. 			<param-name>encoding</param-name>
    30. 			<param-value>UTF-8</param-value>
    31. 		</init-param>
    32. 		<init-param>
    33. 			<param-name>forceEncoding</param-name>
    34. 			<param-value>false</param-value>
    35. 		</init-param>
    36. 	</filter>
    37. 	<filter-mapping>
    38. 		<filter-name>SetCharacterEncoding</filter-name>
    39. 		<url-pattern>/*</url-pattern>
    40. 	</filter-mapping>
    42. 	<!-- jersey Servlet -->
    43. 	<servlet>
    44. 		<servlet-name>rest-inside</servlet-name>
    45. 		<servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>
    46. 		<init-param>
    47. 			<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
    48. 			<param-value>true</param-value>
    49. 		</init-param>
    50. 		<init-param>
    51.             <param-name>com.sun.jersey.config.property.packages</param-name>
    52.             <param-value>com.ll.rest</param-value>
    53.         </init-param>
    54. 		<load-on-startup>1</load-on-startup>
    55. 	</servlet>
    56. 	<servlet-mapping>
    57. 		<servlet-name>rest-inside</servlet-name>
    58. 		<url-pattern>/i/rest/*</url-pattern>
    59. 	</servlet-mapping>
    61. </web-app>

    Jersey服务端代码

    代码如下：
    1. package com.ll.rest;
    3. import javax.ws.rs.Consumes;
    4. import javax.ws.rs.GET;
    5. import javax.ws.rs.Path;
    6. import javax.ws.rs.PathParam;
    7. import javax.ws.rs.Produces;
    8. import javax.ws.rs.core.MediaType;
    10. import com.ll.model.Student;
    12. @Path("/student")
    13. public class JerseyServerTest {
    14. 	@Path("get/{name}")
    15. 	@GET
    16. 	@Produces(MediaType.APPLICATION_JSON)
    17. 	@Consumes(MediaType.APPLICATION_JSON)
    18. 	public Student status(@PathParam("name") String name) {
    19. 		System.out.println("get Student, name: "+name);
    20. 		Student student = new Student();
    21. 		student.setAge(25);
    22. 		student.setName(name);
    23. 		student.setSchool("SuZhou");
    24. 		return student;
    25. 	}
    26. }

    Student.java代码如下：


    安装tomcat，并部署Javaweb

    从官网下载tomcat后，解压缩，配置好环境变量即可使用，这里不做详述；

    配置Javaweb为tomcat默认项目

    tomcat默认项目位于Root下，为了让我们的Javaweb成为默认项目，需要修改配置文件；
    • 配置文件名称：server.xml
    修改如下内容：
    1.  <Context path="" docBase="C:xxxJavaweb" debug="0" reloadable="true"/>

    启动tomcat

    说明：启动前需要对javaweb进行 mvn install(或package)
    每一次修改javaweb相关程序，都需要先对javaweb进行重新编译；

    测试Jersey

    方式1： 使用postman插件测试（Chrome的一个插件，专门用于发送http请求的）；
    方式2： 编写Jersey的Client程序进行测试；

    方式1： 使用postman插件测试



    方式2： 编写Jersey的Client程序进行测试

    客户端程序：
    完整程序：
    1. import javax.ws.rs.core.MediaType;
    2. import javax.ws.rs.core.MultivaluedMap;
    4. import com.sun.jersey.api.client.Client;
    5. import com.sun.jersey.api.client.config.ClientConfig;
    6. import com.sun.jersey.api.client.config.DefaultClientConfig;
    7. import com.sun.jersey.api.json.JSONConfiguration;
    9. public class StudentDao {
    10. 	private Client client;
    12. 	public void init() {
    13. 		if (client == null) {
    14. 			ClientConfig config = new DefaultClientConfig();
    15. 			config.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING,
    16. 					true);
    17. 			client = Client.create(config);
    18. 			client.setConnectTimeout(3000);
    19. 		}
    20. 	}
    22. 	public Student get(String url, String path,
    23. 			MultivaluedMap<String, String> queryParams) {
    24. 		try {
    25. 			return queryParams == null ? client.resource(completeUrl(url))
    26. 					.path(path)
    27. 					.type(MediaType.APPLICATION_JSON)
    28. 					.get(Student.class) 
    29. 					: client.resource(completeUrl(url))
    30. 					.queryParams(queryParams)
    31. 					.path(path)
    32. 					.type(MediaType.APPLICATION_JSON)
    33. 					.get(Student.class);
    34. 		} catch (Exception e) {
    35. 			return null;
    36. 		}
    37. 	}
    39. 	private String completeUrl(String url) {
    40. 		url = url.toLowerCase();
    41. 		if (url.startsWith("http://")) {
    42. 			return url;
    43. 		} else {
    44. 			return "http://" + url;
    45. 		}
    46. 	}
    48. 	public static void main(String[] args) {
    49. 		StudentDao dao = new StudentDao();
    50. 		dao.init();
    51. 		Student ret = dao.get("http://127.0.0.1:8080/",
    52. 				"i/rest/student/get/Tom", null);
    53. 		System.out.println("请求返回：");
    54. 		System.out.println(ret);
    55. 	}
    56. }
    测试结果：
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  • 原文地址：https://www.cnblogs.com/ssslinppp/p/6223038.html
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