Spring RestTemplate 连接重置

Question

我正在尝试按照this 指南使用带有 Spring 设施的 REST 服务，但我遇到了连接问题。 我想用 GET 方法访问 REST 服务

http://date.jsontest.com/

我写了这段代码来消费服务

package pack;
import static org.junit.Assert.assertTrue;

import java.util.HashMap;
import java.util.Map;

import javax.annotation.Generated;

import org.junit.Test;
import org.springframework.web.client.RestTemplate;

import com.fasterxml.jackson.annotation.JsonAnyGetter;
import com.fasterxml.jackson.annotation.JsonAnySetter;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;


public class RestUtilityTest {

    @JsonInclude(JsonInclude.Include.NON_NULL)
    @JsonPropertyOrder({
        "time",
        "milliseconds_since_epoch",
        "date"
    })
    public class DateTime {

        @JsonProperty("time")
        private String time;
        @JsonProperty("milliseconds_since_epoch")
        private Integer milliseconds_since_epoch;
        @JsonProperty("date")
        private String date;
        private Map<String, Object> additionalProperties = new HashMap<String, Object>();

        @JsonProperty("time")
        public String getTime() {
            return time;
        }

        @JsonProperty("time")
        public void setTime(String time) {
            this.time = time;
        }

        @JsonProperty("milliseconds_since_epoch")
        public Integer getMilliseconds_since_epoch() {
            return milliseconds_since_epoch;
        }

        @JsonProperty("milliseconds_since_epoch")
        public void setMilliseconds_since_epoch(Integer milliseconds_since_epoch) {
            this.milliseconds_since_epoch = milliseconds_since_epoch;
        }

        @JsonProperty("date")
        public String getDate() {
            return date;
        }

        @JsonProperty("date")
        public void setDate(String date) {
            this.date = date;
        }

        @JsonAnyGetter
        public Map<String, Object> getAdditionalProperties() {
            return this.additionalProperties;
        }

        @JsonAnySetter
        public void setAdditionalProperty(String name, Object value) {
            this.additionalProperties.put(name, value);
        }

    }

    @Test
    public void getTest()
    {

        RestTemplate restTemplate = new RestTemplate();
        DateTime datetime = restTemplate.getForObject("http://date.jsontest.com", DateTime.class);

        assertTrue(datetime != null);

    }

}

应用程序抛出以下异常堆栈

org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://date.jsontest.com": Connection reset; nested exception is java.net.SocketException: Connection reset
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:524)
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:472)
    at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:237)
    at pack.RestUtilityTest.getTest(RestUtilityTest.java:95)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(Unknown Source)
    at java.net.SocketInputStream.read(Unknown Source)
    at java.io.BufferedInputStream.fill(Unknown Source)
    at java.io.BufferedInputStream.read1(Unknown Source)
    at java.io.BufferedInputStream.read(Unknown Source)
    at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
    at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
    at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at java.net.HttpURLConnection.getResponseCode(Unknown Source)
    at org.springframework.http.client.SimpleClientHttpResponse.getRawStatusCode(SimpleClientHttpResponse.java:47)
    at org.springframework.http.client.AbstractClientHttpResponse.getStatusCode(AbstractClientHttpResponse.java:32)
    at org.springframework.web.client.DefaultResponseErrorHandler.getHttpStatusCode(DefaultResponseErrorHandler.java:55)
    at org.springframework.web.client.DefaultResponseErrorHandler.hasError(DefaultResponseErrorHandler.java:49)
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:510)
    ... 26 more

我用两个不同的网络连接尝试了 REST 调用，所以这不是网络连接问题；此外，如果我从浏览器访问该服务，我可以正确获得响应。

可能是什么问题？

提前谢谢你

Answer 1

解决了。问题与网络连接有关。我所属的网络有防火墙和代理。 现在我正在尝试了解如何使用防火墙网络完成工作（这是我公司的网络）。