Infinite recursion and Jackson JSON and Hibernate JPA problems

When trying to convert a JPA object with two-way associations to JSON, I kept org.codehaus.jackson.map.JsonMappingException: Infinite recursion (StackOverflowError) All I found was The thread , basically ending with a recommendation to avoid two-way Association. Who knows the wrong solution this spring? ------Edited on July 24, 2010 16 ...

Posted by Xzone5 on Fri, 14 Feb 2020 06:14:15 -0800

Java realizes online examination system (administrator function)

In this examination system, the three roles of administrator, teacher and student are equivalent to three systems.Online examination system administrator login pageSubject management page (subject can be added, deleted, modified and checked) /** * Query accounts in pages and show them to the page * ...

Posted by Sfoot on Fri, 14 Feb 2020 05:10:24 -0800

mysql remote connection under docker

A strange place of mysql8.0 under docker I found a strange phenomenon when I installed mysql (last version) with docker in the morning If there is Let's talk about the pit first The newly installed mysql does not allow remote connection. This problem is easy to solve. Once you search online, the ...

Posted by firelior on Thu, 13 Feb 2020 21:47:18 -0800

The problem of uploading files from Android app to spingMVC server

First, upload the code. The encapsulation tool class of the uploaded file is as follows: import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; im ...

Posted by jfdutcher on Thu, 13 Feb 2020 12:20:50 -0800

50 lines of code for Chinese English translation

It takes about 4.2 minutes to read the text. Nowadays, more and more attention is paid to English ability. If you know English, you will come into contact with a larger world, and you will find more information. Especially for programmers, good programming materials come from English documents. Many of the translated versions i ...

Posted by kutte on Thu, 13 Feb 2020 11:44:12 -0800

Spring Boot integration RabbitMQ send receive JSON

By default, the message sent by RabbitMQ is converted to bytecode. Here's how to send JSON data. ObjectMapper The easiest way to send JSON data is to use JSON tool classes such as ObjectMapper to convert the object to JSON format, and then send it. As follows: @Autowired private ObjectMapper objectMapper; public void sendOrder(Order orde ...

Posted by delboy1978uk on Thu, 13 Feb 2020 11:35:21 -0800

Wechat applet development pit filling record

Recently, I need to help my girlfriend implement a wechat app, so I went to learn about the development of the app. For the development of wechat applets, I haven't been in touch with it before (but I have some experience in front-end development). As a complete novice, the starting materials must be We ...

Posted by umasankar on Thu, 13 Feb 2020 07:09:59 -0800

jq of linux tools

brief introduction In the daily development under linux, we often need to process and analyze the json format data. jq Is an open source JSON format data processing tool, it provides a lot of flexible syntax, very powerful. install macOS: brew install jq Ubuntu apt-get install jq Other reference Official website jq syntax Basic usage Suppose t ...

Posted by AudiS2 on Wed, 12 Feb 2020 09:42:18 -0800

Dynamic load user menu

The process is that the user enters the module page after logging in, clicks on different modules, and enters the menu page (different modules, different menu contents) Problems encountered 1. The menu data is stored in the store and the page is blank after refreshing Solution: initialize the menu every time in the global navigation guard ...

Posted by vandalite on Wed, 12 Feb 2020 07:16:43 -0800

ArcGIS api for javascript accesses server's security services by registering token with IdentityManager

Available environment: A stand-alone server environment that is not federated with a portal.Enprise Environment Access Security Services see two other articleshttps://blog.csdn.net/qq_40376439/article/details/104227280https://blog.csdn.net/qq_40376439/article/details/104217511Scenario for use: When we p ...

Posted by manyamile on Tue, 11 Feb 2020 18:08:44 -0800