java将“UTF-8”字符串放入java.lang.Object crushing

Question

我有一些代码如下所示。

HashMap<String, Object> hash = new HashMap<String, Object>();
String str = "한UTF-8 #1글";
hash.put("num", 1);
hash.put("str", str);

@RequestMapping(value={"/test"}, headers={"Accept=application/json"} produces={"text/plain; charset=UTF-8"})
public @ResponseBody ResponseEntity<byte[]> test() throws Exception{
HashMap<String, Object> hash = new HashMap<String, Object>();
hash = "*****I put the hashmap which is upper code block here";

Iterator iter = hash.keySet().iterator();
while(iter.hasNext()){
String key = iter.next();
Object val = hash.get(key);
log.info("한UTF-8 String#2글 : [ key : " + " ] [ val : " + val.toString() + " ]");
}
//jackson asl lib for JSON
ObjectMapper om = new ObjectMapper();
return om.writeValueAsBytes(hash);
}

该项目的标准字符集是“UTF-8”。并且所有消息都很好地打印为UTF-8。我猜把UTF-8字符串放入java.lang.Object是压垮UTF-8的原因。

我该怎么解决这个？

我已经试过了：

=在上块中=

=配置=

• 将消息转换器添加到root-context.xml中，如下所示。

<mvc:annotation-driven>
  <mvc:message-converters>
      <bean class="org.springframework.http.converter.StringHttpMessageConverter">
          <property name="supportedMediaTypes">
              <list>
                  <value>text/html;charset=UTF-8</value>
              </list>
          </property>
      </bean>
  </mvc:message-converters>
</mvc:annotation-driven>

===*条件===

感谢阅读和分享我的问题：D

Answer 1

您首先要做的是为此编写一个单元测试：

HashMap<String, Object> hash = new HashMap<String, Object>();
String str = "한UTF-8 #1글";
hash.put("str", str);

ObjectMapper om = new ObjectMapper();
byte[] data = om.writeValueAsBytes(hash);
assertEquals("...", new String(data, "UTF-8"));

如果这个测试有效，那么你的问题一定在别的地方。如果这次测试不合格，其他150万个地方就不用看了。