java - 如何在 spring api 中使用变音符号

Question

我在向 Spring API 发送变音符号时遇到问题。我想发布以下 JSON:

{
 "username": "testümlaut",
 "firstName": "test",
 "lastName": "Test"
}

为此，我有以下方法开始:

 @RequestMapping(value="/User", method=RequestMethod.POST,
        produces={"application/json ; charset=utf-8"}
)
  @ResponseStatus(HttpStatus.CREATED)
  public @ResponseBody User postUser(@RequestBody User user) {      

    User user = userDao.addUser(user);

    return user;
  }

如你所见，我确实有一条线:

produces={"application/json ; charset=utf-8"} 

但这并没有帮助。我总是遇到异常(0xfc 是 ü):

Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Invalid UTF-8 start byte 0xfc
 at [Source: java.io.PushbackInputStream@721e5ed1; line: 2, column: 19] (through reference chain: de.escosautomation.restserver.model.user.UserClone["username"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Invalid UTF-8 start byte 0xfc
 at [Source: java.io.PushbackInputStream@721e5ed1; line: 2, column: 19] (through reference chain: de.escosautomation.restserver.model.user.UserClone["username"])

我还可以添加什么来让它发挥作用？

谢谢。

Answer 1

您可以在此处检查几个选项:

• 在您的应用程序服务器上进行编码。例如，在 Tomcat 上，在所有连接器上确保将 URIEncoding 设置为 UTF-8。例如:

  <Connector port="80" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="443" URIEncoding="UTF-8"/>

• 在发送 JSON 时，您需要同时使用和产生设置为 MediaType.APPLICATION_JSON_UTF8_VALUE
  (应用程序/json；字符集=UTF-8)。例如:

@RequestMapping(value="/User", method=RequestMethod.POST,
consumes=MediaType.APPLICATION_JSON_UTF8_VALUE,
produces=MediaType.APPLICATION_JSON_UTF8_VALUE
)

• 在web.xml中:

  <filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>