Category Archives: How to Fix

Cause: java.sql.SQLException: invalid column type: 1111 Error [How to Fix] 

Warming: Servlet.service() for servlet [spring] in context with path [/*****] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='ENTERPRISE_NAME', mode=IN, javaType=class java.lang.Object, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting null for parameter #13 with JdbcType OTHER . Try setting a different JdbcType for this parameter or a different jdbcTypeForNull configuration property. Cause: java.sql.SQLException: Invalid column type: 1111] with root cause
java.sql.SQLException: Invalid column type: 1111
	at oracle.jdbc.driver.OracleStatement.getInternalType(OracleStatement.java:3978)

Screen:

When inserting the name,ENTERPRISE_NAME passes null and mybatis returns an error.
The solution is:

Summary of Python deep learning packages

Python deep learning often uses package summaries
Update history

2021/2/28

1.pytorch
Website: https://pytorch.org/
Current installed version: 1.7.1

pip install torch===1.7.1+cu110 torchvision===0.8.2+cu110 torchaudio===0.7.2 -f https://download.pytorch.org/whl/torch_stable.html

2. scikit-learn(sklearn)

pip install scikit-learn

Current version: 0.24.1
3.pandas

pip install pandas

Current version: 1.2.2
Installing Pandas will install Numpy
4.numpy

pip install numpy

Current version: 1.20.1

Previous installers of PyTorch did not use the latest Numpy. 1.16.6 does.
But now the latest version does.

5.matplotlib

pip install matplotlib

Current version: 3.3.4
6 tensorflow 1.15

pip install tensorflow==1.15 -i http://pypi.douban.com/simple/

Less use of
1.networkx
NetworkX is a Python package for building and manipulating complex graph structures and providing algorithms for analyzing graphs.

pip install networkx

Current version: 2.5

Assign the intersection combination of two linked lists to linked list a 

typedef struct node
{
    int data;
    struct node *next;
} LNode, *LinkList;

LinkList Unions(LinkList la, LinkList lb)
{
    LNode *p, *q, *w, *u;
    p = la->next;
    q = lb->next;
    w = la;
    while (p && q)
    {
        if (p->data == q->data)
        {
            w->next = p;
            w = w->next;
            p = p->next;
            u = q;
            q = q->next;
            free(u);
        }
        else if (p->data < q->data)
        {
            u = p;
            p = p->next;
            free(u);
        }
        else
        {
            u = q;
            q = q->next;
            free(q);
        }
    }
    if (q)
    {
        p = q;
    }
    while (q)
    {
        u = q;
        q = q->next;
        free(u);
    }
    w->next = NULL;
    free(lb);
    return la;
}

The reason why HashMap multithreads send out life and death loops

This article is a learning record of Vaccine: Java HashMap’s endless loop, welcome to discuss ~
Suppose the state of a cylinder to be expanded is as follows:
1->; 2-> Null
1 for the current thread to insert a new element of an array of e: 1 and the next element next:
when thread 2 completed the expansion, the pointer to the current status to 2 – & gt; 1-> NULL
Thread 1 continues:
rst (e:1,next:2)
n>arrel :1 ->; null

e=next=2;
next=e1.next=1;

> (e:2,next:1)
> 1-> null

e=next=1;
next=e1.next=null;

(e:1,next:null)
new barrel :1 ->; 2-> 1 is just 1 lt; -> 2

e=next=null;

cpu100%
7 using head insert, 1.8 using tail insert for capacity expansion.
1.7 using head insert, 1.8 using tail insert for capacity expansion.

Eclipse cannot import org.apache.log4j .Logger

Recently, I’ve been practicing using log4j, but I keep getting errors when importing from Eclipse

 
But I have already imported it in the lib below
 

I guess the JAR package was not imported
If you want to place the JAR under the JDK, right-click and select Build Path –>; Configure Build Path
 

 
Then select Add Externsl Jars

 
Select the package we want to import

Then click Apply and it’s OK.
 

Using CONDA virtual environment in pychar

(1) View the directory of the new virtual environment:>; conda env list
(2) Select File->; setting-> Project:****-> Project Interperter-> Existing Environment imports the environment address
(3) Select the virtual environment created above
D:\installed\Anaconda3
:\installed\Anaconda3\envs\tensorflow\python.exe :\installed\Anaconda3\envs\tensorflow\python.exe :\installed\Anaconda3\envs\tensorflow\python.exe