java之远程接口调用

一、通过地址栏传值

1、项目结构

2、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>test.com</groupId>

  <artifactId>test-com</artifactId>

  <packaging>war</packaging>

  <version>1.0-SNAPSHOT</version>

  <name>test-com Maven Webapp</name>

  <url>http://maven.apache.org</url>

  <dependencies>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>3.8.1</version>

      <scope>test</scope>

    </dependency>

    <!-- spring begin -->

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-webmvc</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-jdbc</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-context</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-aop</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-core</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-test</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>javax.servlet</groupId>

      <artifactId>jstl</artifactId>

      <version>1.2</version>

    </dependency>

    <!-- spring end -->

    <!-- Spring AOP + AspectJ by shipengzhi -->

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-aspects</artifactId>

      <version>3.0.6.RELEASE</version>

    </dependency>

    <dependency>

      <groupId>org.aspectj</groupId>

      <artifactId>aspectjrt</artifactId>

      <version>1.6.11</version>

    </dependency>

    <dependency>

      <groupId>org.aspectj</groupId>

      <artifactId>aspectjweaver</artifactId>

      <version>1.6.11</version>

    </dependency>

    <dependency>

      <groupId>cglib</groupId>

      <artifactId>cglib</artifactId>

      <version>2.1_3</version>

    </dependency>

    <!-- end -->

    <dependency>

      <groupId>javax.servlet</groupId>

      <artifactId>servlet-api</artifactId>

      <version>2.5</version>

      <scope>provided</scope>

    </dependency>

    <dependency>

      <groupId>net.sf.json-lib</groupId>

      <artifactId>json-lib</artifactId>

      <version>2.4</version>

      <classifier>jdk15</classifier>

    </dependency>

  </dependencies>

  <build>

    <finalName>test-com</finalName>

  </build>

  <properties>

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

    <spring.version>3.1.2.RELEASE</spring.version>

  </properties>

</project>

3、web.xml

<!DOCTYPE web-app PUBLIC

 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xmlns="http://java.sun.com/xml/ns/javaee"

         xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"

         version="3.0">

  <display-name>Archetype Created Web Application</display-name>

  <servlet>

    <servlet-name>dispatcher</servlet-name>

    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

    <load-on-startup>1</load-on-startup>

  </servlet>

  <!-- 设置dispatchservlet的匹配模式，通过把dispatchservlet映射到/，默认servlet会处理所有的请求，包括静态资源 -->

  <servlet-mapping>

    <servlet-name>dispatcher</servlet-name>

    <url-pattern>/</url-pattern>

  </servlet-mapping>

  <!-- 字符集过滤器 -->

  <filter>

  <filter-name>encodingFilter</filter-name>

  <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>

  <init-param>

    <param-name>encoding</param-name>

    <param-value>UTF-8</param-value>

  </init-param>

  <init-param>

  <param-name>forceEncoding</param-name>

    <param-value>true</param-value>

  </init-param>

  </filter>

  <filter-mapping>

    <filter-name>encodingFilter</filter-name>

    <url-pattern>/*</url-pattern>

  </filter-mapping>

</web-app>

4、dispatcher-servlet.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:context="http://www.springframework.org/schema/context"

       xmlns:mvc="http://www.springframework.org/schema/mvc"

       xmlns:p="http://www.springframework.org/schema/p"

       xsi:schemaLocation="http://www.springframework.org/schema/beans

            http://www.springframework.org/schema/beans/spring-beans.xsd

            http://www.springframework.org/schema/mvc

            http://www.springframework.org/schema/mvc/spring-mvc.xsd

            http://www.springframework.org/schema/context

            http://www.springframework.org/schema/context/spring-context.xsd"

       default-lazy-init="true">

    <!-- 通过mvc:resources设置静态资源，这样servlet就会处理这些静态资源，而不通过控制器 -->

    <!-- 设置不过滤内容，比如:css,jquery,img 等资源文件 -->

    <mvc:resources location="/*.html" mapping="/**.html" />

    <mvc:resources location="/css/*" mapping="/css/**" />

    <mvc:resources location="/js/*" mapping="/js/**" />

    <mvc:resources location="/images/*" mapping="/images/**" />

    <!-- 添加注解驱动 -->

    <mvc:annotation-driven />

    <!-- 默认扫描的包路径 -->

    <context:component-scan base-package="com.*" />

    <!-- mvc:view-controller可以在不需要Controller处理request的情况，转向到设置的View -->

    <!-- 像下面这样设置，如果请求为/，则不通过controller，而直接解析为/index.jsp -->

    <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">

        <property name="viewClass"

                  value="org.springframework.web.servlet.view.JstlView" />

        <property name="prefix" value="/" />

        <property name="suffix" value=".jsp" />

    </bean>

    <!--  日志自定义注解拦截器 -->

    <mvc:interceptors>

        <mvc:interceptor>

            <mvc:mapping path="/**"/>

            <bean class="com.log.SystemLogAspect"></bean>

        </mvc:interceptor>

    </mvc:interceptors>

</beans>

5、TestController.java

package com.controller;

import com.log.Log;

import com.remote.RemoteDemo;

import net.sf.json.JSONObject;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

/**

 * Created by sunjf on 2016/6/26.

 */

@Controller

public class TestController {

    @Log(desc = "log测试")

    @RequestMapping(value = "test1")

    public String test1(){

        String result = RemoteDemo.remoteJsonRequest("http://localhost:8080/test2?username=sun&password=123", 5000, new JSONObject());

        System.out.println(result);

        return "success";

    }

}

6、RemoteDemo.java

package com.remote;

import net.sf.json.JSONObject;

import java.io.BufferedReader;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.net.HttpURLConnection;

import java.net.URL;

/**

 * Created by Administrator on 2016/6/27.

 */

public class RemoteDemo {

    public static String remoteJsonRequest(String url, int timeout, JSONObject object) {

        URL connect;

        StringBuffer data = new StringBuffer();

        try {

            connect = new URL(url);

            HttpURLConnection connection = (HttpURLConnection) connect.openConnection();

            connection.setRequestMethod("POST");

            connection.setDoOutput(true);

            connection.setReadTimeout(timeout);

            connection.setRequestProperty("Content-Type", "application/json");

            OutputStreamWriter paramout = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");

            paramout.write(object.toString());

            paramout.flush();

            InputStream inputStream = connection.getInputStream();

            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "UTF-8");

            BufferedReader reader = new BufferedReader(inputStreamReader);

            String line;

            while ((line = reader.readLine()) != null) {

                data.append(line);

            }

            paramout.close();

            reader.close();

        } catch (Exception e) {

            e.printStackTrace();

        }

        return data.toString();

    }

}

7、调用另一项目中的借口(TestController.java)

package com.controller;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestBody;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

/**

 * Created by sunjf on 2016/6/26.

 */

@Controller

public class TestController {

    @RequestMapping(value = "test2")

    @ResponseBody

    public String test2(String username, String password){

        System.out.println(username + " | " + password);

        return username + " | " + password;

    }

}

8、index.jsp

<html>

<body>

<h2>Hello World!</h2>

<form action="test1" method="post">

    <input type="submit" name="submit">

</form>

</body>

</html>

9、success.jsp

<html>

<body>

<h2>Hello Success!</h2>

</body>

</html>

二、同过jsonObject传值，通过object接收

1、TestController.java，请求端发送请求

package com.controller;

import com.log.Log;

import com.remote.RemoteDemo;

import net.sf.json.JSONObject;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

/**

 * Created by sunjf on 2016/6/26.

 */

@Controller

public class TestController {

    @Log(desc = "log测试")

    @RequestMapping(value = "test1")

    public String test1(){

        JSONObject jsonObject = new JSONObject();

        jsonObject.put("username", "sun");

        jsonObject.put("password", "123");

        String result = RemoteDemo.remoteJsonRequest("http://localhost:8080/test2", 5000, jsonObject);

        System.out.println(result);

        return "success";

    }

}

2、TestController.java，被访问端接口

package com.controller;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestBody;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.ResponseBody;

/**

 * Created by sunjf on 2016/6/26.

 */

@Controller

public class TestController {

    @RequestMapping(value = "test2", method = RequestMethod.POST, produces="application/json")

    @ResponseBody

    public String test2(@RequestBody User user){

        System.out.println(user.toString());

        return user.toString();

    }

}

注：注意此时的@RequestBody注解，为此需要在被访问端引入依赖

<dependency>

      <groupId>org.codehaus.jackson</groupId>

      <artifactId>jackson-mapper-asl</artifactId>

      <version>1.9.8</version>

      <type>jar</type>

      <scope>compile</scope>

    </dependency>

3、User.java，接收实体类

package com.controller;

/**

 * Created by Administrator on 2016/6/28.

 */

public class User {

    private String username;

    private String password;

    @Override

    public String toString() {

        return "User{" +

                "username='" + username + '\'' +

                ", password='" + password + '\'' +

                '}';

    }

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username;

    }

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

}

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