Jersey 实现rest api笔记

搭建项目

https://jersey.java.net/documentation/latest/getting-started.html#new-webapp

 Creating a JavaEE Web Application

mvn archetype:generate -DarchetypeArtifactId=jersey-quickstart-webapp \
                -DarchetypeGroupId=org.glassfish.jersey.archetypes -DinteractiveMode=false \
                -DgroupId=com.example -DartifactId=simple-service-webapp -Dpackage=com.example \
                -DarchetypeVersion=2.25.1

controlers

package com.example.controlers;

import com.example.model.Role;
import com.example.model.User;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.*;
import javax.ws.rs.core.*;
import java.util.ArrayList;

/**
 * Root resource (exposed at "myresource" path)
 */
@Path("user")
public class UserControler {
    @Context UriInfo uriInfo;
    @Context HttpHeaders httpHeaders;
    @Context SecurityContext sc;
    @Context Request req;
    @Context Response resp;
    @Context HttpServletRequest request;
    @Context HttpServletResponse response;

    @GET
    @Path("list")
    @Produces(MediaType.APPLICATION_JSON)
    public ArrayList<User> getUserList() {
        ArrayList<User>  list=new ArrayList<User>();
        response.addHeader("aa","bb");
        User user = new User("userid","username",20);
        list.add(user);
        if(user==null){
            throw new NotFoundException("No such User.");
        }
        return list;
    }

    @GET
    @Path("get")
    @Produces(MediaType.APPLICATION_JSON)
    public User getUser(String id) {
        User user = new User("userid","username",20);
        if(user==null){
            throw new NotFoundException("No such User.");
        }
        return user;
    }

    @POST
    @Path("save")
    @Produces(MediaType.APPLICATION_JSON)
    @Consumes(MediaType.APPLICATION_JSON)
    public User saveUser(@QueryParam("id") String id,  @BeanParam User user) {

        user.setUserAge(Integer.parseInt(id));
        return user;

    }

    @POST
    @Path("delete")
    @Produces(MediaType.APPLICATION_JSON)
    @Consumes(MediaType.APPLICATION_JSON)
    public void deleteUser(@QueryParam("id") String id,  @BeanParam User user) {



    }


    @GET
    @Path("role")
    @Produces(MediaType.APPLICATION_JSON)
    public ArrayList<Role> getRoleListByUserId(@QueryParam("userId") String userId) {
        ArrayList<Role>  list=new ArrayList<Role>();
        response.addHeader("aa","bb");
        Role role = new Role();
        role.setRole_name("车队");
        list.add(role);

        Role role2 = new Role();
        role2.setRole_name("管理员");
        list.add(role2);

        return list;
    }

}

web.xml


<?xml version="1.0" encoding="UTF-8"?>
<!-- This web.xml file is not required when using Servlet 3.0 container,
     see implementation details http://jersey.java.net/nonav/documentation/latest/jax-rs.html -->
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <servlet>
        <init-param>
            <!--
            <param-name>jersey.config.server.provider.packages</param-name>
            <param-value>com.example</param-value>
            -->

            <param-name>javax.ws.rs.Application</param-name>
            <param-value>com.example.app_start.WebApiConfig</param-value>

        </init-param>
        <servlet-name>Jersey Web Application</servlet-name>
        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
        <load-on-startup>0</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Jersey Web Application</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping>
</web-app>

pom.xml

<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>com.example</groupId>
    <artifactId>simple-service-webapp</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>simple-service-webapp</name>

    <build>
        <finalName>simple-service-webapp</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.5.1</version>
                <inherited>true</inherited>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.glassfish.jersey</groupId>
                <artifactId>jersey-bom</artifactId>
                <version>${jersey.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet-core</artifactId>
            <!-- use the following artifactId if you don't need servlet 2.x compatibility -->
            <!-- artifactId>jersey-container-servlet</artifactId -->
        </dependency>
        <!--json输出支持-->
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-moxy</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
    </dependencies>
    <properties>
        <jersey.version>2.25.1</jersey.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
</project>

simple-service-webapp.iml

<?xml version="1.0" encoding="UTF-8"?>
<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
  <component name="FacetManager">
    <facet type="web" name="Web">
      <configuration>
        <descriptors>
          <deploymentDescriptor name="web.xml" url="file://$MODULE_DIR$/src/main/webapp/WEB-INF/web.xml" />
        </descriptors>
        <webroots>
          <root url="file://$MODULE_DIR$/src/main/webapp" relative="/" />
        </webroots>
      </configuration>
    </facet>
  </component>
  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="false">
    <output url="file://$MODULE_DIR$/target/classes" />
    <output-test url="file://$MODULE_DIR$/target/test-classes" />
    <content url="file://$MODULE_DIR$">
      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
      <excludeFolder url="file://$MODULE_DIR$/target" />
    </content>
    <orderEntry type="inheritedJdk" />
    <orderEntry type="sourceFolder" forTests="false" />
    <orderEntry type="library" name="Maven: org.glassfish.jersey.containers:jersey-container-servlet-core:2.25.1" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.hk2.external:javax.inject:2.5.0-b32" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.jersey.core:jersey-common:2.25.1" level="project" />
    <orderEntry type="library" name="Maven: javax.annotation:javax.annotation-api:1.2" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.jersey.bundles.repackaged:jersey-guava:2.25.1" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.hk2:hk2-api:2.5.0-b32" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.hk2:hk2-utils:2.5.0-b32" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.hk2.external:aopalliance-repackaged:2.5.0-b32" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.hk2:hk2-locator:2.5.0-b32" level="project" />
    <orderEntry type="library" name="Maven: org.javassist:javassist:3.20.0-GA" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.hk2:osgi-resource-locator:1.0.1" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.jersey.core:jersey-server:2.25.1" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.jersey.core:jersey-client:2.25.1" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.jersey.media:jersey-media-jaxb:2.25.1" level="project" />
    <orderEntry type="library" name="Maven: javax.validation:validation-api:1.1.0.Final" level="project" />
    <orderEntry type="library" name="Maven: javax.ws.rs:javax.ws.rs-api:2.0.1" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.jersey.media:jersey-media-moxy:2.25.1" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish.jersey.ext:jersey-entity-filtering:2.25.1" level="project" />
    <orderEntry type="library" name="Maven: org.eclipse.persistence:org.eclipse.persistence.moxy:2.6.0" level="project" />
    <orderEntry type="library" name="Maven: org.eclipse.persistence:org.eclipse.persistence.core:2.6.0" level="project" />
    <orderEntry type="library" name="Maven: org.eclipse.persistence:org.eclipse.persistence.asm:2.6.0" level="project" />
    <orderEntry type="library" name="Maven: org.glassfish:javax.json:1.0.4" level="project" />
    <orderEntry type="library" name="Maven: javax.servlet:servlet-api:2.5" level="project" />
  </component>
</module>

WebApiConfig.java


package com.example.app_start;

import com.example.controlers.UserControler;
import org.glassfish.jersey.server.ResourceConfig;
import purple.web.webapi.filter.*;
import purple.web.webapi.interceptor.*;

public class WebApiConfig extends ResourceConfig {
    public WebApiConfig() {

        //想让jersey托管的部分需要加入扫描,或者使用register指定托管类也可以
        //packages("com.example","ccom.example");

        //加载Resource
        register(UserControler.class);
        //注册数据转换器
        //register(JacksonJsonProvider.class);

        // 注册过滤器.
        register(RequestFilter.class);

        //注册拦截器
        register(GzipInterceptor.class);

    }

    
}

RequestFilter

package purple.web.webapi.filter;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.core.Context;

//import com.lgy.bean.Result;
//import com.lgy.utils.JsonUtils;

public class RequestFilter implements ContainerRequestFilter {
    @Context  HttpServletRequest request;

    @Override
    public void filter(ContainerRequestContext requestContext) throws IOException {
       // Result<String> result = new Result<>();

        System.out.println("aaaaaaa test");

        System.err.println(requestContext);

        //.....
       // result.success("aaaaaaaa");
       // requestContext.abortWith(Response.status(Response.Status.OK).entity(JsonUtils.modelToJson(result)).build());
    }

}

GzipInterceptor

package purple.web.webapi.interceptor;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.WriterInterceptor;
import javax.ws.rs.ext.WriterInterceptorContext;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.GZIPOutputStream;

public class GzipInterceptor implements WriterInterceptor {
    @Override
    public void aroundWriteTo(WriterInterceptorContext context)
            throws IOException, WebApplicationException {

        MultivaluedMap<String, Object> headers = context.getHeaders();
        headers.add("Content-Encoding", "gzip");
        String ContentType = context.getMediaType().toString();
        headers.add("Content-Type",ContentType+";charset=utf-8");//解决乱码问题
        final OutputStream outputStream = context.getOutputStream();
        context.setOutputStream(new GZIPOutputStream(outputStream));
        context.proceed();
        System.out.println("GZIP拦截器压缩");
    }
}

model

package com.example.model;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Role {

    private String role_name;

    public String getRole_name() {
        return role_name;
    }

    public void setRole_name(String role_name) {
        this.role_name = role_name;
    }


}

package com.example.model;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class User {
    private String userId;
    private String userName;
    private int userAge;

    public int getUserAge() {
        return userAge;
    }

    public void setUserAge(int userAge) {
        this.userAge = userAge;
    }



    public User(){
    }
    public User(String userId, String userName, int userAge) {
        this.userId = userId;
        this.userName = userName;
        this.userAge = userAge;
    }
    //getter&setter
}

index.jsp

<html>
<body>
<h2>Jersey RESTful Web Application!</h2>

<p><a href="rest/user/list?page=10&rows=10">rest/user/list?page=10&rows=10</a>
<p><a href="rest/user/get?id=1">rest/user/get?id=1</a>
<p><a href="rest/user/role?userId=100">user/role?userId=100</a>



</body>
</html>
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