Java : Character decoding failed.

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信息 ：org.apache.tomcat.util.http.Parameters [DirectJDKLog.java : 173] Character decoding failed. Parameter [param] with value [] has been ignored. Note that the name and value quoted here may be corrupted due to the failed decoding. Use debug level logging to see the original, non-corrupted values.
Note: further occurrences of Parameter errors will be logged at DEBUG level.

原因 ：http接口请求，携带参数中含有%, 编码出错，导致数据传输为空。

解决 ：param.replaceAll("%" , "%25");

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