function jacobi(A::SparseMatrixCSC,b::Vector;tol::Real=1e-2,maxIter::Int=1,out::Int=0,storeInterm::Bool=false;)
	n = length(b)
	OmInvD = 1./diag(A) #D矩阵 并乘以omega
	x = zeros(eltype(A),n)
	r = copy(b)
	rnorm0 = norm(b)
	res = 0
	value = 0.0
	flag   = -1
	iter   = 0
	dx = 0
	for iter = 1:maxIter
		println(iter)
        dr = zeros(eltype(A),n)
		for j = 1:n
			dx =  r[j] * OmInvD[j]
            x[j] += dx
            for gidx = A.colptr[j] : A.colptr[j+1]-1
                dr[A.rowval[gidx]] -= A.nzval[gidx] * dx
            end
		end
        r += dr

		res = norm(r) / rnorm0

		println(res)

		if res < tol
			flag = 0; break
		end
	end

	return x,flag,iter

end