Is Jake Barnes from The Sun Also Rises a representation of Hemingway's life?

As the
other answers note, Jake Barnes does represent aspects of Hemingway and his life: Hemingway was
on the World War I battlefields in France (though as an ambulance driver), he did live in Paris,
he did base some of Jake's friends on real figures in his life, and he did go to Pamplona. He
too drank heavily and enjoyed being in nature, just as Jake does.

Jake
Barnes represents aspects of Hemingway's interiority as well, and this, chiefly, is what
Hemingway wished to show. Hemingway wanted to convey the sense of being lost or aimless that he
and so many people in their twenties felt after the war. World War I was traumatic for many who
could not understand how Western civilization, which seemed to be progressing so well, could
fall back into the pointless carnage of a war like the First World War. Jake, like Hemingway and
others, felt unmoored from the past and alienated and alone. We see Jake in the novel trying to
go church and...