JMeter使用jsonassert对比JSON失败，提示找不到CustomComparator构造方法

环境信息 #

• JMeter版本：5.5
• jsonassert版本：1.5.1
• 已放置Jar包：jsonassert-1.5.1.jar、android-json-0.0.20131108.vaadin1.jar（路径：%JMeter%/lib及%JMeter%/lib/ext）
• Jackson版本：2.13.3
• 运行情况：IDEA+JDK8环境下代码正常执行，JMeter的Beanshell Sampler执行报错

错误信息 #

Response code:500
Response message:org.apache.jorphan.util.JMeterException: Error invoking bsh method: eval   Sourced file: inline evaluation of: ``import org.skyscreamer.jsonassert.Customization; import org.skyscreamer.jsonasse . . . '' : Constructor error: Can't find constructor: org.skyscreamer.jsonassert.comparator.CustomComparator( org.skyscreamer.jsonassert.JSONCompareMode, org.skyscreamer.jsonassert.Customization ) in class: org.skyscreamer.jsonassert.comparator.CustomComparator

JMeter Beanshell Sampler代码 #

import org.skyscreamer.jsonassert.Customization;
import org.skyscreamer.jsonassert.JSONCompare;
import org.skyscreamer.jsonassert.JSONCompareMode;
import org.skyscreamer.jsonassert.JSONCompareResult;
import org.skyscreamer.jsonassert.ValueMatcher;
import org.skyscreamer.jsonassert.comparator.CustomComparator;
import org.json.JSONException;


String newResponseMessage = vars.get("new_S{custNo}");
String oldResponseMessage = vars.get("old_S{custNo}");
log.info("oldRes"+oldResponseMessage);
log.info("newRes"+newResponseMessage);
ValueMatcher matcher = new ValueMatcher() {
            public boolean equal(Object o1, Object o2) {
                return true;
            }
        };
Customization customization = new Customization("orgSeqNo", matcher);
JSONCompareResult result;
try {
    result = JSONCompare.compareJSON(newResponseMessage, oldResponseMessage, new CustomComparator(JSONCompareMode.NON_EXTENSIBLE,customization));
    if (result.passed()) {
        System.out.println("no different");
    } else {
        System.out.println(result.getMessage());
        log.error(result.getMessage());
    //    ctx.getEngine().stopTest();
    }
}catch (JSONException e){
    log.error("Beanshell failure: ", e);
    throw ex;
}

IDEA中可正常运行的配置与代码 #

Maven依赖 #

<dependency>
    <groupId>org.skyscreamer</groupId>
    <artifactId>jsonassert</artifactId>
    <version>1.5.1</version>
</dependency>

Java代码 #

public class Main {
    static String jsonStr1 = "{\"orgSeqNo\":\"123123\",\"code\":200,\"person\":{\"partyId\":\"10000000001\",\"partyName\":\"john\",\"partyCertType\":\"10100\",\"partyCertNo\":\"320925199612122314\",\"partyStatus\":\"1\",\"addresses\":[{\"addrId\":\"1\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":103,\"phone\":\"13213137625\"},{\"addrId\":\"2\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":\"101\",\"phone\":\"13213137625\"},{\"addrId\":\"3\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":\"102\",\"phone\":\"13213137625\"}]},\"message\":\"ok\"}";

    static String jsonStr2 = "{\"orgSeqNo\":\"12e9fc45c09b4a69b7aa2bbcb1313cba\",\"code\":200,\"person\":{\"partyId\":\"10000000001\",\"partyName\":\"john\",\"partyCertType\":\"10100\",\"partyCertNo\":\"320925199612122314\",\"partyStatus\":\"1\",\"addresses\":[{\"addrId\":\"1\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":\"103\",\"phone\":\"13213137625\"},{\"addrId\":\"2\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":\"101\",\"phone\":\"13213137625\"},{\"addrId\":\"3\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":\"102\",\"phone\":\"13213137625\"}]},\"message\":\"ok\"}";
    
    static String jsonStr3 = "{\"orgSeqNo\":\"12e9fc45c09b4a69b7aa2bbcb1313cba\",\"code\":200,\"person\":{\"partyId\":\"10000000001\",\"partyName\":\"john\",\"partyCertType\":\"10100\",\"partyCertNo\":\"320925199612122314\",\"partyStatus\":\"1\",\"addresses\":[{\"addrId\":\"2\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":\"101\",\"phone\":\"13213137625\"},{\"addrId\":\"1\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":\"103\",\"phone\":\"13213137625\"},{\"addrId\":\"3\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":\"102\",\"phone\":\"13213137625\"}]},\"message\":\"ok\"}";
    
    static String jsonStr4 = "{\"orgSeqNo\":\"12e9fc45c09b4a69b7aa2bbcb1313cba\",\"code\":200,\"person\":{\"partyId\":\"10000000001\",\"partyName\":\"john\",\"partyCertType\":\"10100\",\"partyCertNo\":\"320925199612122314\",\"partyStatus\":\"1\",\"addresses\":[{\"addrId\":\"1\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":103,\"phone\":\"13213137625\"},{\"addrId\":\"2\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":\"101\",\"phone\":\"13213137625\"},{\"addrId\":\"3\",\"partyId\":\"10000000001\",\"city\":\"suchou\",\"detailAddr\":\"asdfghqwe\",\"addrType\":\"102\",\"phone\":\"13213137625\"}]},\"message\":\"ok\"}";

    public static void main(String[] args) {
        ValueMatcher matcher = new ValueMatcher() {
            @Override
            public boolean equal(Object o1, Object o2) {
                return true;
            }
        };
        Customization customization = new Customization("orgSeqNo", matcher);
        JSONCompareResult result = null;
        try {
            result  = JSONCompare.compareJSON(jsonStr1, jsonStr3, new CustomComparator(JSONCompareMode.NON_EXTENSIBLE,customization));
            if (result.passed()) {
                System.out.println("no different");
            } else {
                System.out.println(result.getMessage());
            }
        } catch (JSONException e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }
    }
}

期望结果 #

person.addresses[addrId=1].addrType
Expected: 103
     got: 103

解决办法 #

1. 替换为JSR223 Sampler：Beanshell对Java语法兼容有限，改用Groovy引擎的JSR223 Sampler，直接复用现有代码即可正常执行，Groovy对Java语法支持更完善。
2. 移除冲突Jar包：删除%JMeter%/lib和%JMeter%/lib/ext中的android-json-0.0.20131108.vaadin1.jar，JMeter自带的json库可与jsonassert兼容，避免类加载冲突。
3. 调整Beanshell构造方法调用：若坚持使用Beanshell，将CustomComparator的构造参数改为数组形式（Beanshell无法识别可变参数），修改代码如下：

   result = JSONCompare.compareJSON(newResponseMessage, oldResponseMessage, new CustomComparator(JSONCompareMode.NON_EXTENSIBLE, new Customization[]{customization}));
   

4. 重启JMeter：修改Jar包或Sampler类型后，必须重启JMeter确保类加载生效。

内容的提问来源于stack exchange，提问作者gangye