if (initialBytes == null) {
        return checkNotNull(bytes);
      } else {
        byte[] result = new byte[initialBytes.length + bytes.length];
        System.arraycopy(initialBytes, 0, result, 0, initialBytes.length);
        System.arraycopy(bytes, 0, result, initialBytes.length, bytes.length);
        return result;
      }
    }

    @Override
    public byte[] getSinkContents() throws IOException {

    /**
     * @throws Exception
     */
    @Test
    public void test() throws Exception {
        final ConverterRuntimeException e = new ConverterRuntimeException("hoge", "xxx", new RuntimeException("cause"));
        System.out.println(e.getMessage());
        assertThat(e.getPropertyName(), is("hoge"));
        assertThat(e.getValue(), is((Object) "xxx"));
        assertThat(e.getCause().getMessage(), is("cause"));
    }

  Documentation
  -------------

  The most up-to-date documentation can be found at https://maven.apache.org/.

  Release Notes
  -------------

  The full list of changes, system requirements and related can be found at https://maven.apache.org/docs/history.html.

  Installing Maven
  ----------------

  For complete documentation see https://maven.apache.org/download.html#Installation

from fastapi import FastAPI
from pydantic import BaseModel


class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    price: float
    tax: Union[float, None] = None


app = FastAPI()


@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item, q: Union[str, None] = None):
    result = {"item_id": item_id, **item.dict()}
    if q:
        result.update({"q": q})

            return StringUtil.EMPTY;
        }
        String item = list.get(index).trim();
        if (StringUtil.isBlank(item)) {
            return StringUtil.EMPTY;
        }
        if (item.length() > 1 && item.charAt(0) == '"' && item.charAt(item.length() - 1) == '"') {
            item = item.substring(1, item.length() - 1);
        }
        return item;
    }

}


@app.get("/items/{item_id}", response_model=Item)
async def read_item(item_id: str):
    return items[item_id]


@app.put("/items/{item_id}", response_model=Item)
async def update_item(item_id: str, item: Item):
    update_item_encoded = jsonable_encoder(item)
    items[item_id] = update_item_encoded

/// info

`Body` 同样具有与 `Query`、`Path` 以及其他后面将看到的类完全相同的额外校验和元数据参数。

///

## 嵌入单个请求体参数

假设你只有一个来自 Pydantic 模型 `Item` 的请求体参数 `item`。

默认情况下，**FastAPI** 将直接期望这样的请求体。

但是，如果你希望它期望一个拥有 `item` 键并在值中包含模型内容的 JSON，就像在声明额外的请求体参数时所做的那样，则可以使用一个特殊的 `Body` 参数 `embed`：

```Python
item: Item = Body(embed=True)
```

比如：

//// tab | Python 3.10+

```Python hl_lines="17"

        .build();

    try (Response response = client.newCall(request).execute()) {
      if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

      System.out.println(response.handshake().cipherSuite());
      System.out.println(response.body().string());
    }
  }

  public static void main(String... args) throws Exception {
    new CustomCipherSuites().run();
  }

        Headers responseHeaders = response.headers();
        for (int i = 0; i < responseHeaders.size(); i++) {
          System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
        }

        throw new IOException("Unexpected code " + response);
      }

      System.out.println(response.body().string());
    }
  }

  public static void main(String... args) throws Exception {

    }
  }

  private static Byte[] concat(Byte[] left, Byte[] right) {
    Byte[] result = new Byte[left.length + right.length];
    System.arraycopy(left, 0, result, 0, left.length);
    System.arraycopy(right, 0, result, left.length, right.length);
    return result;
  }

  public abstract static class TestByteListGenerator implements TestListGenerator<Byte> {
    @Override