java - 流关闭异常是 RestTemplate Java。如何将多个对象传递给 Java RestClient

Question

我收到意外错误 java.io.IOException: Stream closed

错误从这一行开始

public void createPo(String username, PurchaseOrderDto po, List<PoItemDto> items) {
    Map<String, Object> params = new HashMap<String, Object>();
    params.put("poDto", po);
    params.put("items", items);
    rc.post(String.format("/po?username=%s", username), params);
}

rc 是从另一台服务器调用 api 的其余客户端。这是它的post函数的代码

protected void post(String path, Object object) {
restTemplate.postForObject((url + path), object, Void.class);
}

下面是处理上述请求的api PoController.java

@ResponseStatus(HttpStatus.OK)
@RequestMapping(value = "/po", method = RequestMethod.POST)
public void createPo(@RequestParam("username") String buyerId, @RequestBody PurchaseOrderDto poDto, @RequestBody List<PoItemDto> items) {
    poService.createPo(buyerId, poDto, items);
}

来自处理请求的 tomcat 服务器的日志:

[http-bio-9080-exec-6]  ERROR ib.pms.controller.PoController - Stream closed java.io.IOException: Stream closed
    at org.apache.catalina.connector.InputBuffer.readByte(InputBuffer.java:301)
    at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:106)
    at java.io.FilterInputStream.read(FilterInputStream.java:83)
    at java.io.PushbackInputStream.read(PushbackInputStream.java:139)
    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:168)
    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:105)

我无法理解这一点。有没有更简洁的方法将参数传递给 restApi？

Answer 1

你有两个 @RequestBody , 这是不可能的，你应该有一个对象 Foo (实现可序列化)包含 PurchaseOrderDto po, List<PoItemDto> items然后传递 Foo在你的restTemplate.postForObject .

因此，您的 Controller 必须更改为:

@ResponseStatus(HttpStatus.OK)
@RequestMapping(value = "/po", method = RequestMethod.POST)
public void createPo(@RequestParam("username") String buyerId, @RequestBody Foo foo) {
    poService.createPo(buyerId, foo.getDoDto(), foo.getItems());
}

我不确定它是否会解决您的问题，但至少减少了一个问题

如果你想发送多个对象，你仍然可以使用一个列表:@RequestBody List<Foo> foos