模拟浏览器向服务器发送请求四种方式:
jdk原生的Http包下的一些类
httpclient(比较原始,不怎么用了):第一章 HttpClient的使用
Okhttp(好用,推荐)
retrofit(好用,推荐),用法:第七章 springboot + retrofit
看本章之前可以先看看第七章 springboot + retrofit
1、myboot2项目
1.1、application.properties
server.port=8081
注意:指定服务器启动端口的有三种方式
在application.properties文件中配置server.port = xxx(xxx为端口,eg.8081)(最推荐)
启动类实现EmbeddedServletContainerCustomizer接口,并重写其方法,参考第七章 springboot + retrofit
打好jar后,"java -jar xx.jar --server.port=8081"
1.2、pom.xml
<!-- import lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.8</version>
<scope>provided</scope>
</dependency>
1.3、com.xxx.secondboot.domain.Hotel
package com.xxx.secondboot.domain; import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter; @Getter @Setter
@AllArgsConstructor @NoArgsConstructor
public class Hotel {
private int id;
private String hotelname;
}
1.4、com.xxx.secondboot.web.HotelController
@RestController
@RequestMapping("/hotel")
@Api("HotelController相关api")
public class HotelController { @ApiOperation("获取酒店Hotel信息:getHotelInfo")
@RequestMapping(value="/getHotelInfo",method=RequestMethod.GET)
public Hotel getHotelInfo(@RequestParam("id") int id, @RequestParam("name") String name) {
return new Hotel(id, name);
}
}
说明:上边的接口,就是准备被调用的接口。
2、myboot1项目
2.1、pom.xml
<!-- 引入okhttp -->
<dependency>
<groupId>com.squareup.okhttp</groupId>
<artifactId>okhttp</artifactId>
<version>2.7.5</version>
</dependency>
2.2、application-dev.properties
service.hotel.url = http://localhost:8081/hotel/getHotelInfo?id=%d&name=%s
注意:这里使用了String.format()特性,使用指定符号作为占位符进行占位。
关于占位符的类型参考:http://blog.csdn.net/lonely_fireworks/article/details/7962171
一定要注意,是%d,而不是d%
2.3、application.properties
spring.profiles.active=dev
2.4、com.xxx.firstboot.config.OkHttpClientConfig
package com.xxx.firstboot.config; import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration; import com.squareup.okhttp.OkHttpClient; @Configuration
public class OkHttpClientConfig { @Bean
public OkHttpClient okHttpClient(){
return new OkHttpClient();
}
}
说明:建立OkHttpClient单例。
2.5、com.xxx.firstboot.web.AddressController
@RequestMapping(value = "/testokhttp", method = RequestMethod.GET)
public String testokhttp(@RequestParam("id") int id, @RequestParam("name") String name) {
String url = String.format(HOTEL_URL, id, name);
try {
Request request = new Request.Builder().url(url).build();
Response response = okHttpClient.newCall(request).execute();
String result = response.body().string();
LOGGER.debug("testokhttp成功,url:'{}',result:'{}'", url, result);
return result;
} catch (IOException e) {
LOGGER.error("testokhttp失败,url:'{}'", url);
e.printStackTrace();
}
return "";
}
说明:这里只是同步get方式,关于okhttp的其他用法,参考:http://www.cnblogs.com/ct2011/p/4001708.html
补充:其实上边这种写法还是有问题的,忘记关闭资源,最终代码如下:
@RequestMapping(value = "/testokhttp", method = RequestMethod.GET)
public String testokhttp(@RequestParam("id") int id, @RequestParam("name") String name) {
String url = String.format(HOTEL_URL, id, name);
Response response = null;
try {
Request request = new Request.Builder().url(url).build();
response = okHttpClient.newCall(request).execute();
String result = response.body().string();
LOGGER.debug("testokhttp成功,url:'{}',result:'{}'", url, result);
return result;
} catch (IOException e) {
LOGGER.error("testokhttp失败,url:'{}'", url);
e.printStackTrace();
}finally {
if(response.body()!=null){
try {
response.body().close();//一定要关闭,不然会泄露资源
} catch (IOException e) {
e.printStackTrace();
}
}
}
return "";
}
2.6、logback.xml
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<include resource="org/springframework/boot/logging/logback/base.xml" />
<!-- 1、logger
属性:
1)name:用来指定受此logger约束的某一个包或者具体的某一个类
2)level:用来设置打印级别,大小写无关(最常用的几种):DEBUG, INFO, WARN, ERROR
2、
-->
<!-- <logger name="org.springframework.web" level="DEBUG" /> --> <!-- mybatis日志打印 -->
<!-- <logger name="com.ibatis" level="DEBUG" /> -->
<!-- <logger name="com.ibatis.common.jdbc.SimpleDataSource" level="DEBUG" /> -->
<!-- <logger name="com.ibatis.common.jdbc.ScriptRunner" level="DEBUG" /> -->
<!-- <logger name="com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate" level="DEBUG" /> --> <!-- <logger name="java.sql.Connection" level="DEBUG" /> -->
<!-- <logger name="java.sql.Statement" level="DEBUG" /> -->
<!-- <logger name="java.sql.PreparedStatement" level="DEBUG" /> -->
<!-- 这一句至关重要如果没有,就无法输出sql语句 -->
<logger name="com.xxx.firstboot.mapper" level="DEBUG"></logger>
<logger name="com.xxx.firstboot.web" level="DEBUG"></logger>
</configuration>