原文连接:---------https://www.cnblogs.com/qiaoyeye/p/7218770.html-----------
打开eclipse,新建maven工程,在pom中引用jmeter核心jar包:
<!-- https://mvnrepository.com/artifact/org.apache.jmeter/ApacheJMeter_core --> <dependency> <groupId>org.apache.jmeter</groupId> <artifactId>ApacheJMeter_core</artifactId> <version>3.2</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.jmeter/ApacheJMeter_functions --> <dependency> <groupId>org.apache.jmeter</groupId> <artifactId>ApacheJMeter_functions</artifactId> <version>3.2</version> </dependency>
1,新建一个包com.mytest.functions,包名要包含functions,因为jmeter.properties对这块有配置,可见该文件的classfinder.functions.contain=.functions
2,在该包下新建一个类并继承AbstractFunction,重写该类的所有方法,具体如下:
package com.mytest.functions; import java.io.FileInputStream; import java.io.InputStream; import java.util.Collection; import java.util.LinkedList; import java.util.List; import org.apache.jmeter.engine.util.CompoundVariable; import org.apache.jmeter.functions.AbstractFunction; import org.apache.jmeter.functions.InvalidVariableException; import org.apache.jmeter.samplers.SampleResult; import org.apache.jmeter.samplers.Sampler; import org.apache.jmeter.threads.JMeterVariables; import sun.misc.BASE64Encoder; public class MyBase64 extends AbstractFunction{ //自定义function的描述 private static final List<String> desc = new LinkedList<String>(); static { desc.add("图片路径"); } static { desc.add("图片base64后存放变量"); } private static final String KEY = "__MyBase64"; //存放传入参数的值的变量 private Object[] values; //描述参数 public List<String> getArgumentDesc() { // TODO Auto-generated method stub return desc; } @Override //函数的执行 public synchronized String execute(SampleResult arg0, Sampler arg1) throws InvalidVariableException { // TODO Auto-generated method stub JMeterVariables localJMeterVariables = getVariables(); String str1 = ((CompoundVariable)this.values[0]).execute(); String str2 = getImgBase64(str1); if ((localJMeterVariables != null) && (this.values.length > 1)) { String str3 = ((CompoundVariable)this.values[1]).execute().trim(); localJMeterVariables.put(str3, str2); } return str2; } @Override public String getReferenceKey() { // TODO Auto-generated method stub //提供jmeter函数助手显示的名称 return KEY; } @Override public synchronized void setParameters(Collection<CompoundVariable> arg0) throws InvalidVariableException { // TODO Auto-generated method stub //检查参数的个数,支持的方法有2个,具体用法参加api: /** * protected void checkParameterCount(Collection<CompoundVariable> parameters, int count) throws InvalidVariableException Utility method to check parameter counts. Parameters: parameters - collection of parameters count - number of parameters expected * */ //----------------- /** * * protected void checkParameterCount(Collection<CompoundVariable> parameters, int min, int max) throws InvalidVariableException Utility method to check parameter counts. Parameters: parameters - collection of parameters min - minimum number of parameters allowed max - maximum number of parameters allowed * */ //checkParameterCount(arg0, 1); checkParameterCount(arg0, 1, 2); //将参数值存入变量中 this.values = arg0.toArray(); } public String getImgBase64(String filePath) { InputStream in = null; byte[] data = null; String result = null; try { in = new FileInputStream(filePath); data = new byte[in.available()]; in.read(data); in.close(); BASE64Encoder encoder = new BASE64Encoder(); result = encoder.encode(data); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return result; } }
3,由于我写的类没有依赖第三方jar包,引入的jmeter核心包都是jmeter自带的,所以直接导出上面的类为一个jar包,
并把这个jar放在jmeter安装目录的apache-jmeter-3.2libext下面
4,
重启jmeter,打开函数助手,可看见如下图:
5,下面我们测试一下这个函数是否能使用,新建一个用户定义的变量分别添加${__MyBase64(C:\Users\test\Desktop\20190416173622.jpg,imgresult)}<实际应用中使用第一个就可以>和${imgresult}如下图,注意${__MyBase64(C:\Users\test\Desktop\20190416173622.jpg,imgresult)}一定要在上面
6,运行后可以看到已经成功
7,接口报错分析:
发送接口时,提示500,使用网络生成的base64与之对比,发现得到的字符串有空格问题,<java制动换行引起>,因此要使用jmeter中的BeanShell Sampler对得到的结果进行处理,删除空格。
String Base64_get = vars.get("Base64_jpg"); // 获取用户定义的变量的值 String Base64_get = Base64_get.replaceAll("\s",""); // /s去除空格 log.info("name:"+Base64_get); //log打印 vars.put("Base64_get",Base64_get.toString()); //输出Base64_get,用来调用
如果自己无法生成jar,请留言留下联系方式,
同时感谢:作者乔叶叶的代码分享,博主地址:http://www.cnblogs.com/qiaoyeye/