java系统之间的调用

来源：互联网发布：java标识符的命名测试编辑：程序博客网时间：2024/05/24 15:36

不同的系统之间需要交互，需要数据的共享，总结一下主要的几种方法：

1、HttpURLConnection建立连接

        public static String openUrlReturnMoreMessage(String strUrl, String charSet) throws NetConnectionException{String result = null;BufferedReader br = null;try{URL webUrl = new URL(strUrl);HttpURLConnection httpConn = (HttpURLConnection) webUrl.openConnection();httpConn.setConnectTimeout(30000);httpConn.setReadTimeout(30000);if (httpConn.getResponseCode() != HttpURLConnection.HTTP_OK){log.warn(strUrl + "|ResponseCode=" + httpConn.getResponseCode());throw new NetConnectionException("Connect to url[" + strUrl + "] error, response code is "+ httpConn.getResponseCode());}StringBuffer sb = new StringBuffer();String tempStr = "";br = new BufferedReader(new InputStreamReader(httpConn.getInputStream(), charSet));while ((tempStr = br.readLine()) != null){sb.append(tempStr + "\n");}return sb.toString();}catch (Exception e){//获取?前的url部分，来区分不同的应用int endIndex = strUrl.indexOf("?");String errorUrl = strUrl;if(endIndex != -1){errorUrl = strUrl.substring(0,endIndex);}LogService.fatal("connect error[" + errorUrl + "]",e,"HttpUtil:" + errorUrl);throw new NetConnectionException("Connect to url[" + strUrl + "] error");}finally{if (br != null){             try{br.close();}catch (IOException e1){LoggerUtil.error(e1, HttpUtil.class.getName(), "openUrl(String strUrl)");}}}}

2、Runtime.getRuntime().exec(参数)

通过执行脚本，结果参数意义如下：

"1", "刷新成功"
"-1", "刷新前台时，前台系统异常"
"-2", "刷新失败，前台数据库异常"
"-3", "刷新失败，类型参数为空"
"-4", "刷新失败，无效类型"
"-5", "刷新失败，无效Ip"

Process pro = Runtime.getRuntime().exec("sh  /home/shell/my_mem.sh 10.120.30.35:6801  VersionConstant");//执行脚本，两个参数，第一个：10.120.30.35:6801//第二个参数：VersionConstantBufferReader br=new BufferedReader(newInputStreamReader(pro.getInputStream()));  StringBuffer sb = new StringBuffer();while ((line = br.readLine()) != null){sb.append(line);}String message = sb.toString();//message为1、-1、-2、-3、-4、-5中的某一个参数，表示不同的含义

脚本中调用接口

#!/bin/shSHELL_PATH=/home/shellShell="/usr/bin/wget -O $SHELL_PATH/my_flush.log --no-check-certificate --timeout=10 -t1 http://$1/servlet/refreshConstant?type=$2"#exec shell$Shell#get resultcat $SHELL_PATH/epay_flush.log

然后在目标机器上的项目中配置/servlet/refreshConstant的servlet，在对应的servlet中接受参数type，并进行处理；

3、webservice

可以采用cxf和spring结合的例子。

首先配置服务器端，经历了一下五个步骤：

（1）发布一个接口IHelloWorld.java:

    package cn.com.service;            import javax.jws.WebParam;      import javax.jws.WebService;            @WebService      public interface IHelloWorld {              //@WebParam(name="arg0")可有可无，为了增强可读性          public String sayHello(@WebParam(name="arg0")String text);      }

（2）增加接口的实现类HelloWorldImpl：

    package cn.com.service;      import javax.jws.WebService;            @WebService(endpointInterface="cn.com.service.IHelloWorld")      public class HelloWorldImpl implements IHelloWorld {          public String sayHello(String text) {                 return "Hello" + text ;          }      }

（3）现在可以进行spring配置了，在eclipse的src文件夹下新建applicationContext.xml：

    <?xml version="1.0" encoding="UTF-8"?>      <beans xmlns="http://www.springframework.org/schema/beans"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"           xmlns:p="http://www.springframework.org/schema/p"          xmlns:jaxws="http://cxf.apache.org/jaxws"          xmlns:cxf="http://cxf.apache.org/core"          xsi:schemaLocation="http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd           http://cxf.apache.org/jaxws           http://cxf.apache.org/schemas/jaxws.xsd">                    <import resource="classpath:META-INF/cxf/cxf.xml" />          <import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" />          <import resource="classpath:META-INF/cxf/cxf-servlet.xml" />                    <bean id="hello" class="cn.com.service.HelloWorldImpl"/>                    <jaxws:endpoint id="helloWorld" implementor="#hello" address="/<span style="color:#FF6666;">HelloWorld</span>" />            </beans>

注意：加命名空间；cxf.xml，cxf-extension-soap.xml，cxf-servlet.xml三个文件都在cxf.jar中把它们拷贝到META-INF/目录下；

（5）配置web.xml

    <?xml version="1.0" encoding="UTF-8"?>      <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">                <context-param>              <param-name>contextConfigLocation</param-name>              <param-value>classpath:applicationContext.xml</param-value>          </context-param>                <listener>              <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>          </listener>                <servlet>              <servlet-name>CXFServlet</servlet-name>              <display-name>CXF Servlet</display-name>              <servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class>              <load-on-startup>1</load-on-startup>          </servlet>                <servlet-mapping>              <servlet-name>CXFServlet</servlet-name>              <url-pattern>/*</url-pattern>          </servlet-mapping>                <welcome-file-list>              <welcome-file>index.jsp</welcome-file>          </welcome-file-list>                </web-app>

接着配置客户端：

（1）新建客户程序test

    package pro.webws.client;            import org.springframework.context.ApplicationContext;      import org.springframework.context.support.ClassPathXmlApplicationContext;            public class Test {          public static void main(String[] args) {              ApplicationContext ctx = new ClassPathXmlApplicationContext("spring-client.xml");              IHelloWorld client = (IHelloWorld) ctx.getBean("<span style="color:#FF6666;">client</span>");              String result = client.sayHello("你好!");              System.out.println(result);          }      } （2）配置客户端的spring文件了，新建spring-client.xml文件<pre name="code" class="html">    <?xml version="1.0" encoding="UTF-8"?>      <beans xmlns="http://www.springframework.org/schema/beans"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"           xmlns:p="http://www.springframework.org/schema/p"          xmlns:jaxws="http://cxf.apache.org/jaxws"           xmlns:cxf="http://cxf.apache.org/core"          xsi:schemaLocation="http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd          http://cxf.apache.org/jaxws           http://cxf.apache.org/schema/jaxws.xsd">                <bean id="<span style="color:#FF0000;">client</span>" class="pro.webws.client.IHelloWorld" factory-bean="clientFactory"              factory-method="create" />                        <bean id="clientFactory" class="org.apache.cxf.jaxws.JaxWsProxyFactoryBean">              <property name="serviceClass" value="pro.webws.client.IHelloWorld" />              <property name="address" value="http://localhost:8080/webws/<span style="color:#FF0000;">HelloWorld</span>" />              </bean>      </beans>  至此完成

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