我现在在处理大学网络作业时遇到了一些麻烦。我有一个 php 书店项目，其中包含一个名为“books”的数据库和一个名为“books”的表。我可以在我的 PHP 书店上创建、更新、删除书籍没问题，但大学作业的任务是能够创建一个 HttpClientApp 程序，该程序能够向书店发送 GET 和 POST 添加新书进入数据库。
我不确定我为 HttpClient 和 HttpClientApp 获得的代码是否能够将新书添加到数据库中。我想知道是否有人可以看看他们两个，看看我是否错过了什么？
这是 MyHttpClient.java 文件的完整代码： `
package com.example.bookstore;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
public class MyHttpClient {
/*This creates the method MyHttpResponse execute, with a parameter of MyHttpRequest request which
* creates a variable called request that stores a reference to the MyHttpRequest object allowing us
* to use the objects methods in the MyHttpClient.java., we also add the throws IOException which
* will tell us if we have an error with the input or output in the program
*/
public MyHttpResponse execute(MyHttpRequest request) throws IOException {
/*
* Creates a variable called host of type string which
* stores reference for the method getHost() which is in
* the MyHttpRequest object. We then create a variable
* int port which also stores the reference to the method getPort()
* from the MyHttpRequest which gives us the port number of the avaya server
* we are contacting, if it is less than or equal to 0 it will be set to 80 as
* a default
*/
String host = request.getHost();
int port = request.getPort();
if (port <= 0) {
port = 80;
}
/*
* Create the variable bookSoc of type Socket and is given the paramters of host and port
* which is used in creating the socket to connect to the server
*/
Socket bookSoc = new Socket(host, port);
/*
* Declares a variable called response, which allows us to assign the MyHttpResponse object to the
* response variable. This stores a reference to the MyHttpResponse Object and allows us to reference and use
* the methods in the MyHttpResponse Object
*/
MyHttpResponse response = new MyHttpResponse();
/*
* Creates the a variable fromServer of type BufferedReader which is given the parameter of new
* InputStreamReader which then opens up the stream using the bookSoc.getInputStream method.
*/
BufferedReader fromServer = new BufferedReader(new InputStreamReader(bookSoc.getInputStream()));
/*The variable toServer of type PrintWriter creates the OutPutStream which allows to output to the
* Avaya Server
*/
PrintWriter toServer = new PrintWriter(bookSoc.getOutputStream(), true);
String method = request.getMethod();
/*
* The if statement works by checking if the the Method call equals a GET then
* create the string path and queryString to print out to the server the path and host
* which we require
*/
if (method.equals("GET")) {
String path = request.getPath();
String queryString = request.getQueryString();
toServer.println("GET " + path + " " + "HTTP/1.0");
toServer.println(queryString);
toServer.println("GET " + host);
toServer.println(+port);
/*
* Creates a variable called line of type String
* which will then be used to store the fromServer message, then we creates
* another var called status of type int which the substring which count the
* characters given. Then set the Status var equal to 200 OK
*/
String line;
line = fromServer.readLine();
int status = Integer.parseInt(line.substring(9, 12));
response.setStatus(status);
String descr = line.substring(13);
response.setDescription(descr);
/*
* Once the above code has been executed the do while do while loop,
* is then run, the first do while loop reads in a line from the server
* if the line is not null and line length is greater than 0,
* creates a name and value var and are added to the header.
*
* Then the while creates a var sbuf of type StringBuilder which
* creates a new StringBuilder, then the next do while prints out the body of the the
* repsonse, we then print the host and port number data.
*/
do {
line = fromServer.readLine();
if (line != null && line.length() > 0) {
String name = line.substring(0, line.indexOf(": "));
String value = line.substring(line.indexOf(": ") + 2);
response.addHeader(name, value);
}
} while (line != null && line.length() > 0);
StringBuilder sbuf = new StringBuilder();
do {
line = fromServer.readLine();
if (line != null) {
sbuf.append(line + "\n");
}
} while (line != null);
String body = sbuf.toString();
response.setBody(body);
System.out.println("host: " + host);
System.out.println("port: " + String.valueOf(port));
}
/*
* if the method call is for the POST then the code below is executed which is
* executing the same code as the above if statment except for that it is a POST method instead
* of a GET method.
*/
else if (method.equalsIgnoreCase("POST")) {
String path = request.getPath();
String queryString = request.getQueryString();
toServer.println("POST " + path + " " + "HTTP/1.0");
toServer.println();
toServer.println(queryString);
String line;
line = fromServer.readLine();
int status = Integer.parseInt(line.substring(9, 12));
response.setStatus(status);
String descr = line.substring(13);
response.setDescription(descr);
do{
line = fromServer.readLine();
if (line != null && line.length() > 0) {
String name = line.substring(0, line.indexOf(": "));
String value = line.substring(line.indexOf(": ") + 2);
response.addHeader(name, value);
}
}
while (line != null && line.length() > 0);
StringBuilder sb = new StringBuilder();
do
{
line = fromServer.readLine();
if (line != null) {
sb.append(line).append("\n");
}
} while (line != null);
String body = sb.toString();
response.setBody(body);
System.out.println("host: " + host);
System.out.println("port: " + String.valueOf(port));
}
/*Close the socket*/
bookSoc.close();
/*return the response*/
return response;
}
}
`
这是 MyHttpClientApp.java 文件的完整代码：
`
package com.example.bookstore;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
public class MyHttpClientApp {
public static void main(String[] args) {
String urlString = null;
URI uri;
MyHttpClient client;
MyHttpRequest request;
MyHttpResponse response;
try {
//==================================================================
// send GET request and print response
//==================================================================
urlString = "http://localhost:8888/bookstore/view_books.php";
uri = new URI(urlString);
client = new MyHttpClient();
request = new MyHttpRequest(uri);
request.setMethod("GET");
response = client.execute(request);
System.out.println("=============================================");
System.out.println(request);
System.out.println("=============================================");
System.out.println(response);
System.out.println("=============================================");
//==================================================================
// send POST request and print response
//==================================================================
urlString = "http://localhost:8888/bookstore/view_books.php";
uri = new URI(urlString);
client = new MyHttpClient();
request = new MyHttpRequest(uri);
request.setMethod("POST");
request.addParameter("title", "Fringe");
request.addParameter("firstName", "JJ");
request.addParameter("lastName", "Abrams");
request.addParameter("ISBN", "987654321349211");
request.addParameter("publisher", "Sci-fi");
request.addParameter("year", "2010");
request.addParameter("price", "19.99");
response = client.execute(request);
System.out.println("=============================================");
System.out.println(request);
System.out.println("=============================================");
System.out.println(response);
System.out.println("=============================================");
} catch (URISyntaxException e) {
String errorMessage = "Error parsing uri (" + urlString + "): " + e.getMessage();
System.out.println("MyHttpClientApp: " + errorMessage);
} catch (IOException e) {
String errorMessage = "Error downloading book list: " + e.getMessage();
System.out.println("MyHttpClientApp: " + errorMessage);
}
}
}
`
我很清楚我可能会提出一个模糊的问题，所以请随时要求我发布更多代码等。