第一种
Request mRequest = new Request.Builder()
.post(okhttp3.internal.Util.EMPTY_REQUEST)
.url(postUrl)
.build();
第二种
Request mRequest = new Request.Builder()
.post(RequestBody.create(null, ""))
.url(postUrl)
.build();
Request mRequest = new Request.Builder()
.post(okhttp3.internal.Util.EMPTY_REQUEST)
.url(postUrl)
.build();
Request mRequest = new Request.Builder()
.post(RequestBody.create(null, ""))
.url(postUrl)
.build();

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