Question

服务提供商，2.web.xml 3.pojo类.. 如何为下面的提供者编写客户端...我在数据库中以xml的形式从提供者端获取输出，所以我想在客户端，如何在休息时写客户端？

    package sample.first;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;

@Path("resttest")
public class airtime {
    static ResultSet rs = null;
    static String msg = "hello";
    static Connection dbConnection = null;
    Statement st;

    @GET
    @Path("get_users")
    @Produces("application/xml")
    // Method for getting iduser
    public List<userData> get_users() {
        List<userData> retUser = new ArrayList<userData>();
        try {
            dbConnection = JDBCConnection.getDBConnection();
            st = dbConnection.createStatement();
            rs = st.executeQuery("SELECT iduser FROM user11");
            System.out.println(rs);

            ResultSetMetaData rsmd = rs.getMetaData();
            while (rs.next()) {
                System.out.println("entered while loop");
                int numColumns = rsmd.getColumnCount();
                userData toReturn = new userData();

                for (int i = 1; i < numColumns + 1; i++) {
                    System.out.println("entered for loop");
                    System.out.println(numColumns);
                    String column_name = rsmd.getColumnName(i);
                    System.out.println("column name: " + column_name);
                    int id = rs.getInt("iduser");

                    System.out.println("id=" + id);

                    if (rsmd.getColumnType(i) == java.sql.Types.INTEGER) {
                        System.out.println("Integer working");
                        toReturn.iduser = rs.getInt(column_name);

                    }

                    else if (rsmd.getColumnType(i) == java.sql.Types.VARCHAR) {
                        System.out.println("Varchar working");

                        toReturn.name = rs.getString(column_name);
                    }

                }

                retUser.add(toReturn);
            }
            dbConnection.close();
            return retUser;
        } catch (Exception e) {

            System.out.println(e);
        }
        return retUser;
    }

    @GET
    @Path("get_all")
    @Produces("application/xml")
    // method for getting iduser and name(Multiple columns)
    public List<userData> get_All() {
        List<userData> retUser = new ArrayList<userData>();
        try {
            dbConnection = JDBCConnection.getDBConnection();
            st = dbConnection.createStatement();
            rs = st.executeQuery("SELECT iduser,name FROM user11");
            System.out.println(rs);

            ResultSetMetaData rsmd = rs.getMetaData();
            while (rs.next()) {
                System.out.println("entered while loop");
                int numColumns = rsmd.getColumnCount();
                userData toReturn = new userData();

                for (int i = 1; i < numColumns + 1; i++) {
                    System.out.println("entered for loop");
                    System.out.println(numColumns);
                    String column_name = rsmd.getColumnName(i);
                    System.out.println("column name: " + column_name);

                    if (rsmd.getColumnType(i) == java.sql.Types.INTEGER) {
                        System.out.println("Integer working");
                        toReturn.iduser = rs.getInt(column_name);

                    }

                    else if (rsmd.getColumnType(i) == java.sql.Types.VARCHAR) {
                        System.out.println("Varchar working");

                        toReturn.name = rs.getString(column_name);
                    }

                }

                retUser.add(toReturn);

            }
            dbConnection.close();
            return retUser;
        } catch (Exception e) {
            System.out.println(e);
        }
        return retUser;

    }
}





<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    id="WebApp_ID" version="3.0">
    <display-name>Restdyamicnew</display-name>
    <servlet>
        <servlet-name>Jersey REST Service</servlet-name>
        <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>com.sun.jersey.config.property.packages</param-name>
            <param-value>sample.first;org.codehaus.jackson.jaxrs;javax.xml.parsers</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Jersey REST Service</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping>
</web-app>



    package sample.first;

import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class userData {
    public String name;

    public Integer iduser;
}

Answer 1

您可以使用Apache HTTPClient或Jersey等任何REST客户端发出请求。

HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet('http://.../resttest/get_users');
HttpResponse response = client.execute(request);

由于您的服务正在返回xml，因此您的响应标头将被正确设置（application / xml），而response-body将包含xml。

如何在Restfull中为下面的提供者编写客户端...（我想访问xml格式的服务结果给客户端）

1 个答案: