Question

我尝试使用Rest和post

从Android连接Tomcat服务器

这是发布和回复的一部分

public void networkServiceModule(String ID, String Pwd){
        Log.d("networkServiceModule","ID : "+ID);
        Log.d("networkServiceModule","PW : "+Pwd);

        Call<PostJson> thumbnailCall = ApplicationController.buildNetworkService().postLogin(new PostJson(ID,Pwd));
        thumbnailCall.enqueue(new Callback<PostJson>() {
            @Override
            public void onResponse(Response<PostJson> response, Retrofit retrofit) {
                if(response.isSuccess()) {
                    String resultCode = response.body().getResult_code().toString();
                    Log.d("networkServiceModule", "response Code : "+resultCode);
                    Toast.makeText(getBaseContext(), "Login : " + resultCode, Toast.LENGTH_SHORT).show();
                } else {
                    int statusCode = response.code();
                    Log.d("networkServiceModule", "response Code : "+statusCode);
                }
            }

            @Override
            public void onFailure(Throwable t) {
                Log.d("onFailure", "onFailure Code "+t.toString());
            }
        });
    }

但每当我按“登录”时都会出现此错误。按钮。

java.net.ConnectException: failed to connect to /192.168.1.147 (port 8080) after 10000ms: isConnected failed: EHOSTUNREACH (No route to host)

这里有一些login.jsp的代码

<body>
    <%
        int login_status = 0; //0: empty data, 1: login success, 2: wrong pwd, 3: id not found
        String ID = request.getParameter("id");
        String PW = request.getParameter("pw");

        String str = null;
        String url = "http://192.168.1.6:8080/Attendance/login.jsp";

        if (ID == null)
            login_status = 0;
        else if (PW == null)
            login_status = 0;
        else {
            Connection conn = null;
            Statement stmt = null;
            try {
                Class.forName("com.mysql.jdbc.Driver");
                conn = DriverManager.getConnection(
                        "jdbc:mysql://localhost:3306/testdb?autoReconnect=true&useSSL=false", "root", "1234");

                if (conn == null)
                    throw new Exception("db connection failed");

                stmt = conn.createStatement();
                ResultSet rs = stmt.executeQuery("SELECT * FROM lists WHERE Email = '" + ID + "';");

                if (rs.next()) { //existing ID
                    String Email = rs.getString("Email");
                    String Passwd = rs.getString("Passwd");
                    if (PW.equals(Passwd)) {    //1: login success
                        login_status = 1;
                    }

                ... 

        }

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("result_code", login_status);        
        out.print(jsonObject);

    %>
</body>

.jsp有什么问题吗？

我想打印json，它只有一个int（result_code）作为java（Android studio）的响应。

这是我的NetworkService接口和Studio

上的PostJson类

public interface NetworkService {
    @POST("/Attendance/login.jsp")
    Call<PostJson> postLogin(@Body PostJson postJson);

    @GET("/Attendance/login.jsp")
    Call<Login> getLogin();
}

-

public class PostJson {
    String id;
    String pw;
    public PostJson(String Id, String Pw){
        id = Id;
        pw = Pw;
    }

    String result_code;
    public String getResult_code(){
        return result_code;
    }
}

我是编程的初学者。您的意见对我来说将是一个很大的帮助。在此先感谢：）

java.net.ConnectException：连接失败，isConnected失败：EHOSTUNREACH（无主机路由）

0 个答案: