最近在研究restful的框架,刚刚自己搭建了一个jersey框架,跟大家分享一下,希望能够多交流。
开发工具用的eclipse
1,创建一个maven的web工程,会的朋友可以略过。
完成之后,maven的web框架初步已经搭建完成了,但是完成之后会出现一下问题
项目上面会有红色的错误叉叉,项目结构并不是真正的maven的那种目录结构。
解决maven的目录结构,在新建的web项目右键>build path>configure build path,选择你自己本机上的jdk
完成这一步之后,maven的目录结构可以正常显示,至于在项目出现红色叉叉,是因为没有servlet的jar包,我们在pom.xml里面引入就可以了。
<dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency>
到目前为止,maven的web项目初步完成。下面开始使用jersey框架
1,在pom.xml里面添加一下依赖jar包
<dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.7</version> <scope>test</scope> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.14</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>com.sun.jersey</groupId> <artifactId>jersey-core</artifactId> <version>1.3</version> </dependency> <dependency> <groupId>com.sun.jersey</groupId> <artifactId>jersey-server</artifactId> <version>1.3</version> </dependency> <dependency> <groupId>com.sun.jersey</groupId> <artifactId>jersey-client</artifactId> <version>1.3</version> </dependency> <dependency> <groupId>javax.ws.rs</groupId> <artifactId>jsr311-api</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>asm</groupId> <artifactId>asm</artifactId> <version>3.2</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.16.6</version> <scope>provided</scope> </dependency> <!-- json --> <dependency> <groupId>com.sun.jersey</groupId> <artifactId>jersey-json</artifactId> <version>1.3</version> </dependency> </dependencies>
2,写一个model的user类
package com.test.jersey.model; import javax.xml.bind.annotation.XmlRootElement; @XmlRootElement public class User { private String username; private int id; public User() { } public User(int id, String username) { this.id = id; this.username = username; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public int getId() { return id; } public void setId(int id) { this.id = id; } } 3,写一个restful的入口类
package com.test.jersey; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; import com.test.jersey.model.User; @Path("user") public class JerseyControler { private static Map<Integer, User> list = new HashMap<Integer, User>(); private static int index = 1; public JerseyControler() { if (list.size() == 0) { list.put(index, new User(index++, "hsd")); list.put(index, new User(index++, "wmj")); } } @GET @Path("list") // @Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML}) @Produces(MediaType.APPLICATION_JSON) public List<User> getAllUsers() { List<User> lists = new ArrayList<User>(); lists.addAll(list.values()); return lists; } @GET @Path("user") // @Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML}) @Produces(MediaType.APPLICATION_JSON) public User getUser() { List<User> lists = new ArrayList<User>(); lists.addAll(list.values()); return lists.get(0); } @GET @Produces(MediaType.TEXT_PLAIN) public String getHello() { return "hello, hsd"; } } 3,下面添加web.xml
<servlet> <servlet-name>jersey</servlet-name> <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class> <init-param> <param-name>com.sun.jersey.config.property.resourceConfigClass</param-name> <param-value>com.sun.jersey.api.core.PackagesResourceConfig</param-value> </init-param> <init-param> <param-name>com.sun.jersey.config.property.packages</param-name> <param-value>com.test.jersey</param-value> </init-param> <init-param> <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name> <param-value>true</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet>
4,将项目打包部署到tomcat上,输入网址:http://localhost:8080/jersey/rest/user/list 可以返回json的格式
输入网址:http://localhost:8080/jersey/rest/user 可以看到
如何可以看到这个,那么一个简单的restful框架就完成了,希望你们可以顺利完成搭建