Jersey + tomcat implements restful style and jerseyrestful

Jersey + tomcat implements restful style and jerseyrestful

 

This article references http://www.cnblogs.com/bluesfeng/archive/2010/10/28/1863816.html

 

Environment:

Idea 15.0.2

Jersey 1.3

Tomcat 7.0

Maven 3.3.3

1. idea builds a webapp Based on maven

2. After the project is built, add the pom. xml file to the required package:

<dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.7</version>            <scope>test</scope>        </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>log4j</groupId>            <artifactId>log4j</artifactId>            <version>1.2.14</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>

3. Create a pojo class Student:

@XmlRootElementpublic class Student {    private int id;    private String name;    private String dept;    public int getId() {        return id;    }    public Student() {    }    public Student(int id, String name, String dept) {        super();        this.id = id;        this.name = name;        this.dept = dept;    }    public void setId(int id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getDept() {        return dept;    }    public void setDept(String dept) {        this.dept = dept;    }}

Create resource classes at the same time:

@Path("/students")public class RestWsDemo {    private static Logger logger = Logger.getLogger(RestWsDemo.class);    private static int index = 1;    private static Map<Integer,Student> studentList = new HashMap<Integer, Student>();    public RestWsDemo() {        if(studentList.size()==0) {            studentList.put(index, new Student(index++, "Frank",  "CS"));            studentList.put(index, new Student(index++, "Jersey", "Math"));        }    }    @GET    @Path("{studentid}")    @Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})    public Student getMetadata(@PathParam("studentid") int studentid) {        if(studentList.containsKey(studentid))            return studentList.get(studentid);        else            return new Student(0, "Nil", "Nil");    }    @GET    @Path("list")    @Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})    public List<Student> getAllStudents() {        List<Student> students = new ArrayList<Student>();        students.addAll(studentList.values());        return students;    }    @POST    @Path("add")    @Produces("text/plain")    public String addStudent(@FormParam("name") String name,                             @FormParam("dept") String dept) {        studentList.put(index, new Student(index++, name, dept));        return String.valueOf(index-1);    }    @DELETE    @Path("delete/{studentid}")    @Produces("text/plain")    public String removeStudent(@PathParam("studentid") int studentid) {        logger.info("Receieving quest for deleting student: " + studentid);        Student removed = studentList.remove(studentid);        if(removed==null) return "failed!";        else   return "true";    }    @PUT    @Path("put")    @Produces("text/plain")    public String putStudent(@QueryParam("studentid") int studentid,                             @QueryParam("name") String name,                             @QueryParam("dept") String dept    ) {        logger.info("Receieving quest for putting student: " + studentid);        if(!studentList.containsKey(studentid))            return "failed!";        else            studentList.put(studentid, new Student(studentid, name, dept));        return String.valueOf(studentid);    }}

Project Structure after creation

 

4. Configure web. xml as follows:

<servlet>        <servlet-name>jerseyws</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>cz.service</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>jerseyws</servlet-name>        <url-pattern>/rest/*</url-pattern>    </servlet-mapping>

Here, the attribute value of com. sun. jersey. config. property. packages is the path of the package where your resource is located.

5. maven install skipped

6. start tomcat access path http: // localhost: 8081/rest/students/list. The following result is displayed:

7. Learn and test other resource acquisition methods

 

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