请求参数：https://api.mch.weixin.qq.com/v3/apply4subject/applyment/merchants/273243170/state

请求头：mchid="1397185302",nonce_str="252d39c1-9f57-4c40-9044-edd180ef2b12",timestamp="1568081875",serial_no="5F4942B0F99F83FBF8646FF3EE4D506180DD3753",signature="UJ7TJiQxljo/bTMBe/dF3Va0kUz4AYx9CSQv7pbAUqdWxk1XjuWYHg90oQ+qeRYOl+yPlsQ1n4Us6lw6tDXrmvSb8cEy0XoeSXXBDD0K+Si6SXsXY9ci1rHzEC61j5AbPHGm75WY7iDIccNTjDSUQbTUAzEMmQG16rBxZjIFcrjJwwmNuPEoULfCrACGAnDx96R/ML+e5ZobZMRgh+K9tUZ4+Gq0Ke86eh+WgfSRAQ5SJNjxb18/+5E230ScIy0dRhes0rYJhJlQsB/G3MO0KjyMFoeDZ7ntJXbTJfz0X4QqH0LmbS231VEv4opRNoaXagyv6UL4UaUwmnBQ11sJzw=="

异常：

java.io.IOException: Server returned HTTP response code: 400 for URL: https://api.mch.weixin.qq.com/v3/apply4subject/applyment

at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)

at com.uploadFileTest2222.main(uploadFileTest2222.java:184)