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 getUserList() {
        ArrayList  list=new ArrayList();
        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 getRoleListByUserId(@QueryParam("userId") String userId) {
        ArrayList  list=new ArrayList();
        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

    
        
            

            javax.ws.rs.Application
            com.example.app_start.WebApiConfig

        
        Jersey Web Application
        org.glassfish.jersey.servlet.ServletContainer
        0
    
    
        Jersey Web Application
        /rest/*
    

pom.xml

    4.0.0

    com.example
    simple-service-webapp
    war
    1.0-SNAPSHOT
    simple-service-webapp

    
        simple-service-webapp
        
            
                org.apache.maven.plugins
                maven-compiler-plugin
                2.5.1
                true
                
                    1.7
                    1.7
                
            
        
    

    
        
            
                org.glassfish.jersey
                jersey-bom
                ${jersey.version}
                pom
                import
            
        
    

    
        
            org.glassfish.jersey.containers
            jersey-container-servlet-core
            
            
        
        
        
            org.glassfish.jersey.media
            jersey-media-moxy
        
        
            javax.servlet
            servlet-api
            2.5
        
    
    
        2.25.1
        UTF-8
    

simple-service-webapp.iml

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 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 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

Jersey RESTful Web Application!

rest/user/list?page=10&rows=10
rest/user/get?id=1
user/role?userId=100