背景
在开发中有时候会遇到两个Json对象要比对内容是否一致的问题，比如如下两个JSON，只是部分顺序打乱
{
"code": "19N3L08",
"code1": "3110100252",
"code2": "TX3110-014-160097",
"code3": "3100",
"code4": "3110",
"code5": "LEHY-MRL-II",
"msgList": [
{
"message": "B32053A20",
"message1": "TSXB3200",
"message2": "B320"
},
{
"message": "B33053A20",
"message1": "TSXB3300",
"message2": "B330"
}
]
}{
"code4": "3110",
"code2": "TX3110-014-160097",
"code1": "3110100252",
"code": "19N3L08",
"code3": "3100",
"code5": "LEHY-MRL-II",
"msgList": [
{
"message": "B33053A20",
"message1": "TSXB3300",
"message2": "B330"
},
{
"message": "B33053A20",
"message1": "TSXB3300",
"message2": "B330"
}
]
}主要思路
1.使用反射获取到Result.class的所有get方法，循环遍历比对两个对象，如果对象的内容相等则返回true
private boolean checkEleInfoEqual2(Result strJson, Result tarJson) {
boolean result = true;
try {
for (Field field : Result.class.getDeclaredFields()) {
String name = field.getName();
Method m = Result.class.getMethod("get" + upperCase1th(name));
if ((m.invoke(strJson) instanceof String) && !strEquals((String) m.invoke(strJson), (String) m.invoke(tarJson))) {
result = false;
}
}
result = result && listEquals(strJson.getMsgList(), tarJson.getMsgList());
} catch (Exception e) {
result = false;
e.printStackTrace();
}
System.out.println(result);
return result;
}2.重写Result.class和Msg.class中的equals方法，如果对象的内容相等，则返回true
重写了equals方法后，可以直接将两个Result对象使用equals方法进行判断对象的内容相等，对于对象中的List结构则可以使用List的contains方法判断对象是否在List中，原理是在contains方法在ArrayList中通过indexOf比对数据，indexOf中遍历数组使用重写过的equals方法判断。
public boolean contains(Object o) {
return indexOf(o) >= 0;
}
public int indexOf(Object o) {
if (o == null) {
for (int i = 0; i < size; i++)
if (elementData[i]==null)
return i;
} else {
for (int i = 0; i < size; i++)
if (o.equals(elementData[i]))
return i;
}
return -1;
} BeanEqual
package com.example.json;
import com.alibaba.fastjson.JSONObject;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.List;
/**
* @Description:
* @author: wei.wang
* @since: 2019/11/13 15:36
* @history: 1.2019/11/13 created by wei.wang
*/
public class BeanEqual {
private static String strJson = "{\n" +
" \"code\": \"19N3L08\",\n" +
" \"code1\": \"3110100252\",\n" +
" \"code2\": \"TX3110-014-160097\",\n" +
" \"code3\": \"3100\",\n" +
" \"code4\": \"3110\",\n" +
" \"code5\": \"LEHY-MRL-II\",\n" +
" \"msgList\": [\n" +
" {\n" +
" \"message\": \"B32053A20\",\n" +
" \"message1\": \"TSXB3200\",\n" +
" \"message2\": \"B320\"\n" +
" },\n" +
" {\n" +
" \"message\": \"B33053A20\",\n" +
" \"message1\": \"TSXB3300\",\n" +
" \"message2\": \"B330\"\n" +
" },\n" +
" {\n" +
" \"message\": \"B37053A2019\",\n" +
" \"message1\": \"TSXB37002\",\n" +
" \"message2\": \"B370\"\n" +
" },\n" +
" {\n" +
" \"message\": \"F31053A20\",\n" +
" \"message1\": \"TSXF3100\",\n" +
" \"message2\": \"F310\"\n" +
" },\n" +
" {\n" +
" \"message\": \"F31053A20\",\n" +
" \"message1\": \"TSXF3100\",\n" +
" \"message2\": \"F380\"\n" +
" },\n" +
" {\n" +
" \"message\": \"F31053A20\",\n" +
" \"message1\": \"TSXF3100\",\n" +
" \"message2\": \"F300\"\n" +
" }\n" +
" ]\n" +
"}";
private static String tarJson = "{\n" +
" \"code4\": \"3110\",\n" +
" \"code2\": \"TX3110-014-160097\",\n" +
" \"code1\": \"3110100252\",\n" +
" \"code\": \"19N3L08\",\n" +
" \"code3\": \"3100\",\n" +
" \"code5\": \"LEHY-MRL-II\",\n" +
" \"msgList\": [\n" +
"\t {\n" +
" \"message\": \"B33053A20\",\n" +
" \"message1\": \"TSXB3300\",\n" +
" \"message2\": \"B330\"\n" +
" },\n" +
" {\n" +
" \"message\": \"B37053A2019\",\n" +
" \"message1\": \"TSXB37002\",\n" +
" \"message2\": \"B370\"\n" +
" },\n" +
" {\n" +
" \"message\": \"F31053A20\",\n" +
" \"message1\": \"TSXF3100\",\n" +
" \"message2\": \"F300\"\n" +
" },\n" +
" {\n" +
" \"message\": \"B32053A20\",\n" +
" \"message1\": \"TSXB3200\",\n" +
" \"message2\": \"B320\"\n" +
" },\n" +
" {\n" +
" \"message\": \"F31053A20\",\n" +
" \"message1\": \"TSXF3100\",\n" +
" \"message2\": \"F310\"\n" +
" },\n" +
" {\n" +
" \"message\": \"F31053A20\",\n" +
" \"message1\": \"TSXF3100\",\n" +
" \"message2\": \"F380\"\n" +
" }\n" +
" ]\n" +
"}";
public static void main(String[] args) {
//将获取到的JSON转为Result对象
Result r1 = JSONObject.parseObject(strJson, Result.class);
Result r2 = JSONObject.parseObject(tarJson, Result.class);
System.out.println(strJson);
System.out.println(tarJson);
BeanEqual test = new BeanEqual();
test.checkEleInfoEqual2(r1, r2);
}
public static boolean listEquals(List l1, List l2) {
boolean result = true;
if (l1.size() != l2.size()) {
result = false;
System.out.println("行数据量不一致");
}
for (Msg msg : l1) {
if (!l2.contains(msg)) {
result = false;
System.out.println(msg.getMessage() + "数据不一致");
} else {
l2.remove(msg);
}
}
if (l2.size() > 0) {
result = false;
}
return result;
}
/**
* 重写equals方法
*
* @param strJson
* @param tarJson
*/
private void checkEleInfoEqual(Result strJson, Result tarJson) {
System.out.println(strJson.equals(tarJson));
}
/**
* 反射获取值
*
* @param strJson
* @param tarJson
*/
private boolean checkEleInfoEqual2(Result strJson, Result tarJson) {
boolean result = true;
try {
for (Field field : Result.class.getDeclaredFields()) {
String name = field.getName();
Method m = Result.class.getMethod("get" + upperCase1th(name));
if ((m.invoke(strJson) instanceof String) && !strEquals((String) m.invoke(strJson), (String) m.invoke(tarJson))) {
result = false;
}
}
result = result && listEquals(strJson.getMsgList(), tarJson.getMsgList());
} catch (Exception e) {
result = false;
e.printStackTrace();
}
System.out.println(result);
return result;
}
/**
* 首字符大写
*
* @param str
* @return
*/
public static String upperCase1th(String str) {
return str.substring(0, 1).toUpperCase() + str.substring(1);
}
/**
* 字符串相等
*
* @param str
* @param tar
* @return
*/
public static boolean strEquals(String str, String tar) {
//都为空，或者都不为空且相等，数字判断
if (isStrEmpty(str) && isStrEmpty(tar) || (!isStrEmpty(str) && !isStrEmpty(tar) && (str.equals(tar) || numberEqual(str, tar)))) {
return true;
}
return false;
}
/**
* 字符是否为空
*
* @param str
* @return
*/
public static boolean isStrEmpty(String str) {
return str == null || str.trim().length() == 0;
}
/**
* 校验数字相等 2.0 2.00 2
*
* @param str
* @param tar
* @return
*/
public static boolean numberEqual(String str, String tar) {
try {
double strNum = Double.valueOf(str);
double tarNum = Double.valueOf(tar);
return strNum == tarNum;
} catch (Exception e) {
//如果抛出异常，返回False
return false;
}
}
}
Msg
package com.example.json;
/**
* @Description:
* @author: wei.wang
* @since: 2019/11/13 15:33
* @history: 1.2019/11/13 created by wei.wang
*/
public class Msg {
private String message;
private String message1;
private String message2;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String getMessage1() {
return message1;
}
public void setMessage1(String message1) {
this.message1 = message1;
}
public String getMessage2() {
return message2;
}
public void setMessage2(String message2) {
this.message2 = message2;
}
@Override
public boolean equals(Object obj) {
return BeanEqual.strEquals(message, ((Msg) obj).getMessage()) &&
BeanEqual.strEquals(message1, ((Msg) obj).getMessage1()) &&
BeanEqual.strEquals(message2, ((Msg) obj).getMessage2());
}
}
Result
package com.example.json;
import java.util.List;
/**
* @Description:
* @author: wei.wang
* @since: 2019/11/13 15:33
* @history: 1.2019/11/13 created by wei.wang
*/
public class Result {
private String code;
private String code1;
private String code2;
private String code3;
private String code4;
private String code5;
private List msgList;
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getCode1() {
return code1;
}
public void setCode1(String code1) {
this.code1 = code1;
}
public String getCode2() {
return code2;
}
public void setCode2(String code2) {
this.code2 = code2;
}
public String getCode3() {
return code3;
}
public void setCode3(String code3) {
this.code3 = code3;
}
public String getCode4() {
return code4;
}
public void setCode4(String code4) {
this.code4 = code4;
}
public String getCode5() {
return code5;
}
public void setCode5(String code5) {
this.code5 = code5;
}
public List getMsgList() {
return msgList;
}
public void setMsgList(List msgList) {
this.msgList = msgList;
}
//重写Result的equals方法，如果内容相等则返回true
@Override
public boolean equals(Object obj) {
return BeanEqual.strEquals(code, ((Result) obj).getCode()) &&
BeanEqual.strEquals(code1, ((Result) obj).getCode1()) &&
BeanEqual.strEquals(code2, ((Result) obj).getCode2()) &&
BeanEqual.strEquals(code3, ((Result) obj).getCode3()) &&
BeanEqual.strEquals(code4, ((Result) obj).getCode4()) &&
BeanEqual.strEquals(code5, ((Result) obj).getCode5()) &&
BeanEqual.listEquals(msgList, ((Result) obj).getMsgList() );
}
}