cxf数据压缩

时间：2023-11-23 19:28:56

一、HTTP数据的压缩

　　在http协议中当content-encoding对应的值为gzip，deflate，x-gzip，x-deflate时，数据是经过了压缩之后再进行传输的。有些时候我们当我们传输的数据比较大的时候，可以采取这种方式，从而提高数据的传输速度。在web service中，当某个接口返回的数据比较大的时候，也可以进行压缩处理。

二、示例

　　1、使用soap协议的web service

　　实体类：

package com.cxf.compress.ws;

public class Person {

    private String name;

    private String homeAddress;

    private String companyAddress;

    public Person() {

        StringBuilder sb = new StringBuilder();

        for (int i = 1; i < 10; ++i) {

            sb.append("X");

        }

        this.name = sb.toString();

        this.homeAddress = sb.toString();

        this.companyAddress = sb.toString();

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getHomeAddress() {

        return homeAddress;

    }

    public void setHomeAddress(String homeAddress) {

        this.homeAddress = homeAddress;

    }

    public String getCompanyAddress() {

        return companyAddress;

    }

    public void setCompanyAddress(String companyAddress) {

        this.companyAddress = companyAddress;

    }

}

　　接口MyService：

package com.cxf.compress.ws;

import java.util.List;

import javax.jws.WebMethod;

import javax.jws.WebResult;

import javax.jws.WebService;

@WebService

public interface MyService{

    @WebMethod

    @WebResult(name = "personResult")

    public List<Person> getPerson();

}

　　实现类MyServiceImpl：

package com.cxf.compress.ws;

import java.util.ArrayList;

import java.util.List;

public class MyServiceImpl implements MyService {

    @Override

    public List<Person> getPerson() {

        List<Person> list = new ArrayList<Person>();

        list.add(new Person());

        list.add(new Person());

        list.add(new Person());

        list.add(new Person());

        return list;

    }

}

　　服务端启动类：

package com.cxf.compress.ws;

import org.apache.cxf.interceptor.LoggingInInterceptor;

import org.apache.cxf.interceptor.LoggingOutInterceptor;

import org.apache.cxf.jaxws.JaxWsServerFactoryBean;

import org.apache.cxf.transport.common.gzip.GZIPInInterceptor;

import org.apache.cxf.transport.common.gzip.GZIPOutInterceptor;

/**

 * 使用数据压缩

 *

 */

public class MyServer {

    public static void main(String[] args) {

        JaxWsServerFactoryBean factoryBean = new JaxWsServerFactoryBean();

        factoryBean.getInInterceptors().add(new GZIPInInterceptor());//解压使用 gzip的请求

        factoryBean.getInInterceptors().add(new LoggingInInterceptor());

        GZIPOutInterceptor out = new GZIPOutInterceptor();

        out.setThreshold(0);//压缩数据的阀值设置为0， 默认超过1k的数据才使用gzip压缩，设置为0，表示响应的数据只要大于0就进行压缩处理

        factoryBean.getOutInterceptors().add(out);//返回的数据使用gizp压缩

        factoryBean.getOutInterceptors().add(new LoggingOutInterceptor());

        String address = "http://localhost:8080/cxf/myservice";

        factoryBean.setAddress(address);

        factoryBean.setServiceClass(MyServiceImpl.class);

        factoryBean.create();

    }

}

　　客户端请求类：

package com.cxf.compress.ws;

import java.util.List;

import org.apache.cxf.endpoint.Client;

import org.apache.cxf.endpoint.Endpoint;

import org.apache.cxf.frontend.ClientProxy;

import org.apache.cxf.jaxws.JaxWsProxyFactoryBean;

import org.apache.cxf.transport.common.gzip.GZIPInInterceptor;

import org.apache.cxf.transport.common.gzip.GZIPOutInterceptor;

public class MyClient {

    public static void main(String[] args) {

        JaxWsProxyFactoryBean factoryBean = new JaxWsProxyFactoryBean();

        factoryBean.setAddress("http://localhost:8080/cxf/myservice");

        factoryBean.setServiceClass(MyService.class);

        Object object = factoryBean.create();

        Client client = ClientProxy.getClient(object);

        Endpoint endpoint = client.getEndpoint();

        endpoint.getInInterceptors().add(new GZIPInInterceptor());//解压使用 gzip的请求

        GZIPOutInterceptor out = new GZIPOutInterceptor();

        out.setThreshold(0);//压缩数据的阀值设置为0， 默认超过1k的数据才使用gzip压缩，设置为0，表示响应的数据只要大于0就进行压缩处理

        endpoint.getOutInterceptors().add(out);//返回的数据使用gizp压缩

        MyService service = (MyService) object;

        List<Person> list = service.getPerson();

        System.out.println("name: " + list.get(0).getName());

    }

}

　　2、restful web service

　　实体类Person：

package com.cxf.compress.rs;

import java.util.Date;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "person")

public class Person {

    private int id;

    private String name;

    private Date date;

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public Date getDate() {

        return date;

    }

    public void setDate(Date date) {

        this.date = date;

    }

}

　　服务接口MyService：

package com.cxf.compress.rs;

import javax.ws.rs.GET;

import javax.ws.rs.Path;

import javax.ws.rs.Produces;

@Path("person")

@Produces("*/*")

public interface MyService {

    @GET

    @Path("/")

    public java.util.List<Person> getAll();

}

　　服务接口实现类MyServiceImpl:

package com.cxf.compress.rs;

import java.util.Date;

import java.util.List;

import javax.ws.rs.GET;

import javax.ws.rs.Path;

import javax.ws.rs.Produces;

public class MyServiceImpl implements MyService {

    @Override

    public List<Person> getAll() {

        List<Person> persons = new java.util.ArrayList<Person>();

        Person person = new Person();

        person.setId(111);

        person.setName("zhangsan");

        person.setDate(new Date());

        Person person2 = new Person();

        person2.setId(222);

        person2.setName("lisi");

        person2.setDate(new Date());

        persons.add(person);

        persons.add(person2);

        return persons;

    }

}

　　服务类Server:

package com.cxf.compress.rs;

import org.apache.cxf.interceptor.LoggingInInterceptor;

import org.apache.cxf.interceptor.LoggingOutInterceptor;

import org.apache.cxf.jaxrs.JAXRSServerFactoryBean;

import org.apache.cxf.transport.common.gzip.GZIPInInterceptor;

import org.apache.cxf.transport.common.gzip.GZIPOutInterceptor;

public class Server {

    public static void main(String[] args) {

        JAXRSServerFactoryBean factoryBean = new JAXRSServerFactoryBean();

        factoryBean.setAddress("http://localhost:8080/myservice");

        factoryBean.setResourceClasses(MyServiceImpl.class);

        factoryBean.getInInterceptors().add(new GZIPInInterceptor());//解压使用 gzip的请求

        factoryBean.getInInterceptors().add(new LoggingInInterceptor());

        GZIPOutInterceptor out = new GZIPOutInterceptor();

        out.setThreshold(0);//压缩数据的阀值设置为0， 默认超过1k的数据才使用gzip压缩，设置为0，表示响应的数据只要大于0就进行压缩处理

        factoryBean.getOutInterceptors().add(out);//返回的数据使用gizp压缩

        factoryBean.getOutInterceptors().add(new LoggingOutInterceptor());

        factoryBean.create();

    }

}

　　客户端访问类Client：

package com.cxf.compress.rs;

import java.io.IOException;

import java.io.InputStream;

import java.io.StringWriter;

import java.net.URL;

import java.text.SimpleDateFormat;

import java.util.Date;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.transform.OutputKeys;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.TransformerFactoryConfigurationError;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.stream.StreamResult;

import org.apache.cxf.helpers.IOUtils;

import org.apache.cxf.io.CachedOutputStream;

import org.apache.http.HttpEntity;

import org.apache.http.HttpStatus;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.methods.CloseableHttpResponse;

import org.apache.http.client.methods.HttpDelete;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.client.methods.HttpPut;

import org.apache.http.entity.ContentType;

import org.apache.http.entity.StringEntity;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

import org.apache.http.util.EntityUtils;

import org.w3c.dom.Document;

import org.w3c.dom.Element;

public class Client {

    public static void main(String[] args) throws Exception {

        String getResult = get("http://localhost:8080/myservice/person");

        System.out.println(getResult);

    }

    private static String get(String url) throws IOException,

            ParserConfigurationException {

        HttpGet get = new HttpGet(url);

        get.setHeader("Accept", "application/json");

        get.addHeader("Accept-Encoding" ,"gzip"); //请求使用数据压缩

        CloseableHttpClient client = HttpClients.createDefault();

        String responseContent = null;

        CloseableHttpResponse response = null;

        try {

            response = client.execute(get);

            HttpEntity entity = response.getEntity();// 响应体

            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {// 响应码

                responseContent = EntityUtils.toString(entity, "UTF-8");

            }

        } catch (ClientProtocolException e) {

            e.printStackTrace();

        }

        return responseContent;

    }

}

　　对于使用了gzip进行压缩之后的响应，通过topMon进行监听后，传输的数据大小会小很多。　　

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