我遇到了这个 Controller 示例,想知道它是否是线程安全的?我特别想知道 gson 实例变量。
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.google.gson.Gson;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Controller
public class TestController {
private final Gson gson = new Gson();
@RequestMapping(value = "/test", method = RequestMethod.GET)
public void test(HttpServletResponse res, HttpServletRequest req) throws IOException {
HashMap<String, String> hm = new HashMap();
res.getWriter().print(gson.toJson(results));
res.getWriter().close();
}
}