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[Java] Java实现后台发送及接收json数据的方法示例

编程语言 编程语言 发布于:2021-10-06 15:59 | 阅读数:489 | 评论:0

这篇文章主要介绍了Java实现后台发送及接收json数据的方法,结合实例形式分析了java针对json格式数据的传输与操作相关技巧,需要的朋友可以参考下
本文实例讲述了java实现后台发送及接收json数据的方法。分享给大家供大家参考,具体如下:
本篇博客试用于编写java后台接口以及两个项目之间的接口对接功能;
具体的内容如下:
1.java后台给指定接口发送json数据
package com.utils;
import java.io.bufferedreader;
import java.io.inputstreamreader;
import java.io.outputstreamwriter;
import java.net.httpurlconnection;
import java.net.url;
import net.sf.json.jsonobject;
public class testone {
  public static void main(string[] args) {
    jsonobject jsobj1 = new jsonobject();
    jsonobject jsobj2 = new jsonobject();
    jsobj2.put("deviceid", "112");
    jsobj2.put("channel", "channel");
    jsobj2.put("state", "0");
    jsobj1.put("item", jsobj2);
    jsobj1.put("requestcommand", "control");
    post(jsobj1,"http://192.168.3.4:8080/hsdc/test/authentication");
  }
  public static string post(jsonobject json,string path) {
    string result="";
  try {
    httpclient client=new defaulthttpclient();
      httppost post=new httppost(url);
      post.setheader("content-type", "appliction/json");
      post.addheader("authorization", "basic ywrtaw46");
      stringentity s=new stringentity(json.tostring(), "utf-8");
      s.setcontentencoding(new basicheader(http.content_type, "appliction/json"));
      post.setentity(s);
      httpresponse httpresponse=client.execute(post);
      inputstream in=httpresponse.getentity().getcontent();
      bufferedreader br=new bufferedreader(new inputstreamreader(in, "utf-8"));
      stringbuilder strber=new stringbuilder();
      string line=null;
      while ((line=br.readline())!=null) {
        strber.append(line+"\n");
      }
      in.close();
      result=strber.tostring();
      if(httpresponse.getstatusline().getstatuscode()!=httpstatus.sc_ok){
        result="服务器异常";
      }
  } catch (exception e) {
    system.out.println("请求异常");
    throw new runtimeexception(e);
  }
  system.out.println("result=="+result);
  return result;
  }
}
2.java后台接收json数据
package com.controller;
import java.io.ioexception;
import java.io.inputstreamreader;
import java.io.unsupportedencodingexception;
import java.util.hashmap;
import java.util.map;
import org.springframework.http.mediatype;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestmethod;
import org.springframework.web.bind.annotation.restcontroller;
import javax.annotation.resource;
import javax.servlet.http.httpservletrequest;
@restcontroller
@requestmapping("test")
public class testconttroller{
  @resource
  protected httpservletrequest request;
  @requestmapping(value="authentication",produces = mediatype.application_json_value,method = requestmethod.post)
  public map<string,object> getstring() throws unsupportedencodingexception, ioexception{
    system.out.println("进入=====================");
    //后台接收
    inputstreamreader reader=new inputstreamreader(request.getinputstream(),"utf-8");
    char [] buff=new char[1024];
    int length=0;
    while((length=reader.read(buff))!=-1){
       string x=new string(buff,0,length);
       system.out.println(x);
    }
    //响应
    map<string,object> jsonobject = new hashmap<string, object>(); //创建json对象
    jsonobject.put("username", "张三");   //设置json对象的属性
    jsonobject.put("password", "123456");
    return jsonobject;
  }
}
运行testone之后将json数据发送到authentication接口,接收的数据如图:
DSC0000.png

testone中main方法返回的数据如图:
DSC0001.png

至此java后台发送及接收json数据代码也就完成了
ps:关于json操作,这里再为大家推荐几款比较实用的json在线工具供大家参考使用:
在线json代码检验、检验、美化、格式化工具:https://tool.zzvips.com/t/jsonjiexi/
json在线格式化工具:https://tool.zzvips.com/t/jsonformat/
在线excel转json工具:https://tool.zzvips.com/t/excel2json/
json转excel工具:https://tool.zzvips.com/t/json2excel/
在线json压缩/转义工具:https://tool.zzvips.com/t/jsonzip/
希望本文所述对大家java程序设计有所帮助。
原文链接:https://blog.csdn.net/huxiangen/article/details/80433320

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