java接口正确的是，java代码的接口_Java代码--简单接口的实现

Eclipse中新建web项目，项目中新建一个servlet接口，servlet中java代码如下：

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

this.doPost(request, response);

}

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

request.setCharacterEncoding("UTF-8");

response.setCharacterEncoding("UTF-8");

response.setContentType("text/plain;charset=utf-8");

response.addHeader("Access-Control-Allow-Origin", "*"); //跨域问题

response.addHeader("Access-Control-Allow-Headers", "*");

response.addHeader("Access-Control-Allow-Methods","GET,POST,PUT,HEAD,DELETE,OPTIONS");

//1.接收JSON格式参数

BufferedReader br = new BufferedReader(new InputStreamReader(request.getInputStream()));

String line = null;

StringBuilder sb = new StringBuilder(); //1.读取实体内容封装成字符数组

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

sb.append(line);

}

br.close();

JSONObject jo = JSONObject.fromObject(sb.toString()); //2.将字符数组封装成json对象

String img1=jo.getString("img1"); //3.读取客户端发过来的json串,组装参数

String img2=jo.getString("img2");

System.out.println("------img1:"+img1); //控制台打印出上传的参数

System.out.println("------img2:"+img2);

//2.直接URL传递参数(接口?img1=123&img2=456)

/*

String img1=request.getParameter("img1");

String img2=request.getParameter("img2");

//向客户端发送数据

response.setContentType("text/javascript");

PrintWriter out=response.getWriter();

System.out.println("------img1:"+img1);

System.out.println("------img2:"+img2);

*/

//3.Map 传递参数(接口?img1=123&img2=456&img3=3...)任意值

/*

MapparamMap = request.getParameterMap();

for(Map.Entryentry:paramMap.entrySet()){

String key = entry.getKey();

String[] value = entry.getValue();

System.out.println(key + " : " + value[0]);

}

*/

//4.httpUrlConnection Post请求传参数及 客户端接收参数

/*

InputStreamReader reader=new InputStreamReader(request.getInputStream()); //接收请求参数

BufferedReader buffer=new BufferedReader(reader);

String data=buffer.readLine();

String a[] = data.split(":::");

System.out.println(data);

String header=request.getHeader("headerdata"); //头部信息

System.out.println(header);

response.setContentType("text/javascript"); //向客户端发送数据

PrintWriter out=response.getWriter();

String img1=a[0];

String img2=a[1];

System.out.println("------img1："+img1);

System.out.println("------img2："+img2);

*/

}

将项目部署在Tomcat或其它容器中 (web.xml中***为接口地址)，可以用Postman调用接口进行测试。

有什么需要改进和补充的地方希望大家多多提出，共同进步