一，介绍

上周用jmeter做性能测试时，接口B传入的参数需要依赖接口A生成的借贷申请ID，接口A运行完需要把生成的借贷申请ID导出来到一个文件，作为参数传给接口B，刚开始的时候，手动去数据库倒，

倒了几次感觉有些麻烦，就写了一段python读取数据库并将读到数据写入到本地文件

二，python读取数据库代码如下：

# -*- coding:utf-8 -*-
import pymysql

def get_loan_number(file):
    connect = pymysql.Connect(
        host="0.0.0.0",
        port=3306,
        user="test",
        passwd="12345678",
        db="test",
        charset='utf8'
    )
    print("写入中，请等待……")
    cursor = connect.cursor()
    sql = "select id  from application where status='SUBMITTING' and contract like 'Performance-%'  and " \
          "loan_org_party='166490194444444444'"
    cursor.execute(sql)
    number = cursor.fetchall()
    fp = open(file, "w")
    loan_count = 0
    for loanNumber in number:
        loan_count += 1
        fp.write(loanNumber[0] + "\n")
    fp.close()
    cursor.close()
    connect.close()
    print("写入完成,共写入%d条数据……" % loan_count)

if __name__ == "__main__":
    file = r"C:\Users\test\Desktop\loanNUmber.txt"
    get_loan_number(file)

运行结果如下：

三、写到本地数据如下：

四、jmeter 用CSV Data Set Config读取本地参数文件