给我提供一个java实现的httpUtils类，要求能发请求，且get请求带请求体

以下是一个简单的Java实现的HTTP工具类，支持发送GET、POST请求，以及GET请求带请求体：

import java.io.*;
import java.net.*;

public class HttpUtils {
    public static String sendGet(String url, String params) throws Exception {
        String fullUrl = url;
        if (params != null && !params.isEmpty()) {
            fullUrl += "?" + params;
        }
        URL obj = new URL(fullUrl);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        con.setRequestMethod("GET");
        con.setRequestProperty("User-Agent", "Mozilla/5.0");
        int responseCode = con.getResponseCode();
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
        return response.toString();
    }

    public static String sendPost(String url, String params) throws Exception {
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        con.setRequestMethod("POST");
        con.setRequestProperty("User-Agent", "Mozilla/5.0");
        con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
        con.setDoOutput(true);
        if (params != null && !params.isEmpty()) {
            OutputStreamWriter writer = new OutputStreamWriter(con.getOutputStream());
            writer.write(params);
            writer.flush();
            writer.close();
        }
        int responseCode = con.getResponseCode();
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
        return response.toString();
    }

    public static String sendGetWithBody(String url, String params) throws Exception {
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        con.setRequestMethod("POST");
        con.setRequestProperty("User-Agent", "Mozilla/5.0");
        con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
        con.setDoOutput(true);
        if (params != null && !params.isEmpty()) {
            OutputStreamWriter writer = new OutputStreamWriter(con.getOutputStream());
            writer.write(params);
            writer.flush();
            writer.close();
        }
        int responseCode = con.getResponseCode();
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
        return response.toString();
    }
}

这个工具类包含了三个方法：sendGet、sendPost、sendGetWithBody，分别用于发送GET请求、POST请求，以及GET请求带请求体。其中，sendGet和sendPost方法与常见的HTTP工具类类似，而sendGetWithBody方法则是采用POST请求来模拟GET请求带请求体的情况。需要注意的是，在使用sendGetWithBody方法时，需要将请求方法设置为POST，并在请求体中传递参数。