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mysql5.x忘記密碼

參考：https://blog.csdn.net/qq_34102150/article/details/126120056

1、停止MySQL服務，輸入 net stop mysql 停止服務。

2、切換到MySQL的bin文件下，

mysql5.x： mysqld --console --skip-grant-tables --shared-memory

mysqld --console --skip-grant-tables --shared-memory

3、輸入mysql -uroot -p回車，不用輸入密碼，直接按回車跳過，

輸入： use mysql

輸入： update user set password=PASSWORD('123456') where USER='root';
或者： GRANT ALL PRIVILEGES ON *.* TO 'root'@'%'IDENTIFIED BY '123456' WITH GRANT OPTION;
輸入： FLUSH PRIVILEGES;

4、重啟服務

posted @ 2024-02-17 15:09 半導體閱讀(40) | 評論 (0) | 編輯收藏

微信小程序開發流程

準備工作：
需要https的域名
1、域名申請、備案（我是在阿里云買的服務器，域名也在阿里云購買）
2、域名與IP綁定
3、ssl安全證書申請（https）
4、下載ssl安全證書布署在tomcat服務器
4、在云服務器tomcat中布署https

參考 https://blog.csdn.net/qq_35206244/article/details/97613498

ps:任何操作不會，直接打阿里云客服電話 95187

小程序開發流程：
1、在微信官網注冊帳號
2、下載小程序開發工具
3、小程序開發、上傳
4、小程序送審，審核通過即可分享給你的朋友

posted @ 2020-08-08 10:11 半導體閱讀(117) | 評論 (0) | 編輯收藏

mall 工程創建踩坑

新建項目坑

www.macrozheng.com項目，打開maven總是引入失敗，后來

https://www.cnblogs.com/dk1024/p/10778841.html

https://blog.csdn.net/ken_ding/article/details/85623092這個是前端有可能遇見的坑的解決辦法

安裝環境文檔：

http://www.macrozheng.com/#/deploy/mall_deploy_windows

posted @ 2020-07-20 21:52 半導體閱讀(119) | 評論 (0) | 編輯收藏

springboot 打包后，在dos命令行運行提示沒有主清單屬性的解決辦法

1.在pom.xml文件中插入

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

2.雙擊IDEA右側Maven Projects的lifecycle下的package，打包成jar，重新執行以上命令。

posted @ 2020-06-27 16:42 半導體閱讀(208) | 評論 (0) | 編輯收藏

MyBatis出現org.apache.ibatis.executor.ExecutorException異常

DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - Opening JDBC Connection
DEBUG [main] - Created connection 29011566.
DEBUG [main] - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@1baae6e]
DEBUG [main] - ==>  Preparing: select * from user where username like concat(?,'%')
DEBUG [main] - ==> Parameters: 張(String)

org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: org.apache.ibatis.executor.result.ResultMapException: Error attempting to get column 'username' from result set.  Cause: java.sql.SQLException: Cannot convert value 'å¼ ä¸?' from column 2 to TIMESTAMP.
### The error may exist in sqlmap/User.xml
### The error may involve test.findUserByName3
### The error occurred while handling results
### SQL: select * from user where username like concat(?,'%')
### Cause: org.apache.ibatis.executor.result.ResultMapException: Error attempting to get column 'username' from result set.  Cause: java.sql.SQLException: Cannot convert value 'å¼ ä¸?' from column 2 to TIMESTAMP.

    at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:149)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)
    at com.swjd.test.B.test2(B.java:40)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: org.apache.ibatis.executor.result.ResultMapException: Error attempting to get column 'username' from result set.  Cause: java.sql.SQLException: Cannot convert value 'å¼ ä¸?' from column 2 to TIMESTAMP.
    at org.apache.ibatis.type.BaseTypeHandler.getResult(BaseTypeHandler.java:83)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.createUsingConstructor(DefaultResultSetHandler.java:671)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.createByConstructorSignature(DefaultResultSetHandler.java:654)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.createResultObject(DefaultResultSetHandler.java:618)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.createResultObject(DefaultResultSetHandler.java:591)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getRowValue(DefaultResultSetHandler.java:397)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValuesForSimpleResultMap(DefaultResultSetHandler.java:354)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValues(DefaultResultSetHandler.java:328)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSet(DefaultResultSetHandler.java:301)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:194)
    at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:65)
    at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79)
    at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:63)
    at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)
    at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147)

24 more
Caused by: java.sql.SQLException: Cannot convert value 'å¼ ä¸?' from column 2 to TIMESTAMP.
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
    at com.mysql.jdbc.ResultSetRow.getTimestampFast(ResultSetRow.java:1328)
    at com.mysql.jdbc.ByteArrayRow.getTimestampFast(ByteArrayRow.java:124)
    at com.mysql.jdbc.ResultSetImpl.getTimestampInternal(ResultSetImpl.java:6669)
    at com.mysql.jdbc.ResultSetImpl.getTimestamp(ResultSetImpl.java:5988)
    at com.mysql.jdbc.ResultSetImpl.getTimestamp(ResultSetImpl.java:6026)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.ibatis.logging.jdbc.ResultSetLogger.invoke(ResultSetLogger.java:69)
    at com.sun.proxy.$Proxy6.getTimestamp(Unknown Source)
    at org.apache.ibatis.type.DateTypeHandler.getNullableResult(DateTypeHandler.java:39)
    at org.apache.ibatis.type.DateTypeHandler.getNullableResult(DateTypeHandler.java:28)
    at org.apache.ibatis.type.BaseTypeHandler.getResult(BaseTypeHandler.java:81)

41 more
Caused by: java.lang.NumberFormatException: 張三
    at com.mysql.jdbc.StringUtils.getInt(StringUtils.java:756)
    at com.mysql.jdbc.ResultSetRow.getTimestampFast(ResultSetRow.java:1253)

54 more

Process finished with exit code -1

上網找了一些答案也沒有解決我的問題，

后來發現原來是User類的構造函數問題，找不到相關的構造函數；試著在User中加一個默認的構造函數，就解決了。。。

希望能幫到大家。

默認的構造函數在創建構造函數后，不會自動創建默認構造函數

DEBUG [main] - Logging initialized using 'class org.apache.ibatis.logging.slf4j.Slf4jImpl' adapter.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
DEBUG [main] - Opening JDBC Connection
DEBUG [main] - Created connection 27155935.
DEBUG [main] - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@19e5ddf]
DEBUG [main] - ==>  Preparing: select * from user where id=?
DEBUG [main] - ==> Parameters: 27(Integer)

org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: org.apache.ibatis.reflection.ReflectionException: Error instantiating class com.swjd.po.User with invalid types () or values (). Cause: java.lang.NoSuchMethodException: com.swjd.po.User.<init>()
### The error may exist in sqlmap/User.xml
### The error may involve test.findUserById-Inline
### The error occurred while setting parameters
### SQL: select * from user where id=?
### Cause: org.apache.ibatis.reflection.ReflectionException: Error instantiating class com.swjd.po.User with invalid types () or values (). Cause: java.lang.NoSuchMethodException: com.swjd.po.User.<init>()

    at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66)
    at com.test.Test1.test1(Test1.java:31)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: org.apache.ibatis.reflection.ReflectionException: Error instantiating class com.swjd.po.User with invalid types () or values (). Cause: java.lang.NoSuchMethodException: com.swjd.po.User.<init>()
    at org.apache.ibatis.reflection.factory.DefaultObjectFactory.instantiateClass(DefaultObjectFactory.java:86)
    at org.apache.ibatis.reflection.factory.DefaultObjectFactory.create(DefaultObjectFactory.java:48)
    at org.apache.ibatis.reflection.factory.DefaultObjectFactory.create(DefaultObjectFactory.java:41)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.createResultObject(DefaultResultSetHandler.java:528)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.createResultObject(DefaultResultSetHandler.java:507)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getRowValue(DefaultResultSetHandler.java:331)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValuesForSimpleResultMap(DefaultResultSetHandler.java:291)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValues(DefaultResultSetHandler.java:266)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSet(DefaultResultSetHandler.java:236)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:150)
    at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:60)
    at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:73)
    at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:60)
    at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267)
    at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137)
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96)
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108)

25 more
Caused by: java.lang.NoSuchMethodException: com.swjd.po.User.<init>()
    at java.lang.Class.getConstructor0(Class.java:3082)
    at java.lang.Class.getDeclaredConstructor(Class.java:2178)
    at org.apache.ibatis.reflection.factory.DefaultObjectFactory.instantiateClass(DefaultObjectFactory.java:60)

42 more

Process finished with exit code -1

這種錯也是同樣的問題，

加上無參構造函數就可以了。

當創建對象來接受sql結果時會遍歷實體類的構造方法找到與之匹配的，如果實體類中有構造方法了但是參數不匹配的話就會報上述錯誤，此時添加無參構造方法（默認的構造方法），會走其他方法，

https://blog.csdn.net/qq_35975416/article/details/80488267

posted @ 2020-03-25 20:01 半導體閱讀(5564) | 評論 (0) | 編輯收藏

idea jsp代碼不提示Java代碼

在<head>里寫java代碼有提示，在<body>里不寫%>就有提示。

這是由于按提示快捷鍵alt+enter導致。解決方法一直未找到合適的。
解決方法：

posted @ 2020-03-08 20:11 半導體閱讀(250) | 評論 (0) | 編輯收藏

項目管理推薦好文

掙值管理（PV、EV、AC、SV、CV、SPI、CPI）記憶之我見 http://www.cnitpm.com/pm/7707.html https://blog.csdn.net/weixin_38197294/article/details/79852129

posted @ 2020-03-08 11:41 半導體閱讀(112) | 評論 (0) | 編輯收藏

jquery傳參及獲取方式

html寫法

<form id="myform">
<input type="radio" value="1" name="gender">男
<input type="radio" value="2"  name="gender">女
<input type="text" name="username" />
<input type="button" value="提交" onclick="fun()"/>
</form>
<div id="myText"></div>

獲取值方式一

獲取值方式二：

var gender = $ ("input [name= 'gender' ] : checked") .val() ;

posted @ 2020-02-08 18:36 半導體閱讀(162) | 評論 (0) | 編輯收藏

spring boot結合thymeleaf通過后臺傳入的數值循環生成標簽

spring boot結合thymeleaf通過后臺傳入的數值循環生成標簽

posted @ 2019-10-16 16:06 半導體閱讀(334) | 評論 (0) | 編輯收藏

模態框傳值

模態框傳值：

https://blog.csdn.net/linhaiyun_ytdx/article/details/77417702

posted @ 2019-10-12 16:35 半導體閱讀(151) | 評論 (0) | 編輯收藏

Bootstrap 模態框 + iframe > 打開子頁面 > 數據傳輸/關閉模態框

摘要: 父頁面bootstrap模態框: <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="false" > <div class="modal-dialog modal-lg"> ... 閱讀全文

posted @ 2019-05-28 21:23 半導體閱讀(329) | 評論 (0) | 編輯收藏

mybatis學習之路----mysql批量新增數據

來源：

https://blog.csdn.net/xu1916659422/article/details/77971867

   mysql新增語句
insert into 表名（字段，字段。。。） values ( 值，值。。。)；此種適合單條插入。
批量插入，
   一種可以在代碼中循環著執行上面的語句，但是這種效率太差，下面會有對比，看看它有多差。
另一種，可以用mysql支持的批量插入語句，
insert into
   表名（字段，字段。。。） values ( 值，值。。。)，( 值，值。。。)，( 值，值。。。)....
這種方式相比起來，更高效。
實現過程mapper.xml

<!-- 跟自增主鍵方式相比，這里的不同之處只有兩點

1 insert語句需要寫id字段了，并且 values里面也不能省略

2 selectKey 的order屬性需要寫成BEFORE 因為這樣才能將生成的uuid主鍵放入到model中，

這樣后面的insert的values里面的id才不會獲取為空

跟自增主鍵相比就這點區別，當然了這里的獲取主鍵id的方式為 select uuid()

當然也可以另寫別生成函數。-->

select uuid()

</selectKey>

insert into t_customer (id,c_name,c_sex,c_ceroNo,c_ceroType,c_age)

values (#{id},#{name},#{sex},#{ceroNo},#{ceroType},#{age})

</insert>

insert into

t_customer (id,c_name,c_sex,c_ceroNo,c_ceroType,c_age)

values

<!-- foreach mybatis循環集合用的

collection="list" 接收的map集合中的key 用以循環key對應的屬性

separator="," 表示每次循環完畢，在sql后面放一個逗號

item="cus" 每次循環的實體對象名稱隨意-->

((select uuid()),#{cus.name},#{cus.sex},#{cus.ceroNo},#{cus.ceroType},#{cus.age})

</foreach>

</insert>

實體model對象

package com.soft.mybatis.model;

/**

* Created by xuweiwei on 2017/9/10.

*/

public class Customer {

    private String id;

    private String name;

    private Integer age;

    private Integer sex;

    private String ceroNo;

    private Integer ceroType;

    public String getId() {

        return id;

    }

    public void setId(String id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public Integer getAge() {

        return age;

    }

    public void setAge(Integer age) {

        this.age = age;

    }

    public Integer getSex() {

        return sex;

    }

    public void setSex(Integer sex) {

        this.sex = sex;

    }

    public String getCeroNo() {

        return ceroNo;

    }

    public void setCeroNo(String ceroNo) {

        this.ceroNo = ceroNo;

    }

    public Integer getCeroType() {

        return ceroType;

    }

    public void setCeroType(Integer ceroType) {

        this.ceroType = ceroType;

    }

    @Override

    public String toString() {

        return "Customer{" +

                "id='" + id + '\'' +

                ", name='" + name + '\'' +

                ", age=" + age +

                ", sex=" + sex +

                ", ceroNo='" + ceroNo + '\'' +

                ", ceroType='" + ceroType + '\'' +

                '}';

    }

}

接口

int add(Customer customer);
int batchInsert(Map<String,Object> param);

實現

實現

   /**

     * 新增數據

     * @param customer

     * @return

     */

    public int add(Customer customer) {

        return insert("customer.insert", customer);

    }

    /**

     * 批量插入數據

     * @param param

     * @return

     */

    public int batchInsert(Map<String,Object> param) {

        return insert("customer.batchInsert", param);

    }

    /**

     * 公共部分

     * @param statementId

     * @param obj

     * @return

     */

    private int insert(String statementId, Object obj){

        SqlSession sqlSession = null;

        try {

            sqlSession = SqlsessionUtil.getSqlSession();

            int key =  sqlSession.insert(statementId, obj);

            // commit

            sqlSession.commit();

            return key;

        } catch (Exception e) {

            sqlSession.rollback();

            e.printStackTrace();

        } finally {

            SqlsessionUtil.closeSession(sqlSession);

        }

        return 0;

    }

posted @ 2019-05-23 11:29 半導體閱讀(135) | 評論 (0) | 編輯收藏

springboot中樹形結構的開發

POM中引入

<dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <classifier>jdk15</classifier>
        </dependency>

實體類創建

import net.sf.json.JSONArray;

import java.util.ArrayList;
import java.util.List;

/**
* 構造目錄JSON樹
* Created by   network on 2019/5/22
*/
public class TreeBuilder {

    List<Node> nodes = new ArrayList<>();

    public String buildTree(List<Node> nodes) {

        TreeBuilder treeBuilder = new TreeBuilder(nodes);

        return treeBuilder.buildJSONTree();
    }

    public TreeBuilder() {
    }

    public TreeBuilder(List<Node> nodes) {
        super();
        this.nodes = nodes;
    }

    // 構建JSON樹形結構
    public String buildJSONTree() {
        List<Node> nodeTree = buildTree();
        JSONArray jsonArray = JSONArray.fromObject(nodeTree);
        return jsonArray.toString();
    }

    // 構建樹形結構
    public List<Node> buildTree() {
        List<Node> treeNodes = new ArrayList<>();
        List<Node> rootNodes = getRootNodes();
        for (Node rootNode : rootNodes) {
            buildChildNodes(rootNode);
            treeNodes.add(rootNode);
        }
        return treeNodes;
    }

    // 遞歸子節點
    public void buildChildNodes(Node node) {
        List<Node> children = getChildNodes(node);
        if (!children.isEmpty()) {
            for (Node child : children) {
                buildChildNodes(child);
            }
            node.setChildren(children);
        }
    }

    // 獲取父節點下所有的子節點
    public List<Node> getChildNodes(Node pnode) {
        List<Node> childNodes = new ArrayList<>();
        for (Node n : nodes) {
            if (pnode.getId().equals(n.getPid())) {
                childNodes.add(n);
            }
        }
        return childNodes;
    }

    // 判斷是否為根節點
    public boolean rootNode(Node node) {
        boolean isRootNode = true;
        for (Node n : nodes) {
            if (node.getPid().equals(n.getId())) {
                isRootNode = false;
                break;
            }
        }
        return isRootNode;
    }

    // 獲取集合中所有的根節點
    public List<Node> getRootNodes() {
        List<Node> rootNodes = new ArrayList<>();
        for (Node n : nodes) {
            if (rootNode(n)) {
                rootNodes.add(n);
            }
        }
        return rootNodes;
    }

    public static class Node {

        private String id;
        private String pid;
        private String name;
        private List<Node> children;

        public Node() {
        }

        public Node(String id, String pid, String name) {
            super();
            this.id = id;
            this.pid = pid;
            this.name = name;
        }

        public String getId() {
            return id;
        }

        public void setId(String id) {
            this.id = id;
        }

        public String getPid() {
            return pid;
        }

        public void setPid(String pid) {
            this.pid = pid;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public List<Node> getChildren() {
            return children;
        }

        public void setChildren(List<Node> children) {
            this.children = children;
        }
    }
}

mapper.xml

<select id="findByItemtypeTree" parameterType="BsItemtype" resultType="Node">
        SELECT upcode as pid,itemname as name,itemtypecode as id FROM 表名 WHERE 1=1
        <if test="upcode != null  and upcode != '' ">
            and upcode = #{值}
        </if>
    </select>

controller:返回結果

    //樹形結構
    @RequestMapping("left")
    ModelAndView left() throws JSONException {
        String mavStr = "";
        BsItemtype queryItemtype = new BsItemtype();
        //查詢根目錄樹
      //  queryItemtype.setUpcode("00");
        // 獲取全部目錄節點
        List<TreeBuilder.Node> itemtypeTree = itemtypeService.findByItemtypeTree();

        // 拼裝樹形json字符串
         mavStr = new TreeBuilder().buildTree(itemtypeTree);
        mavStr = mavStr.replaceAll("\"children\"","\"nodes\"");
        mavStr= mavStr.replaceAll("\"id\"","\"value\"");
        mavStr = mavStr.replaceAll("\"name\"","\"text\"");
        ModelAndView mav = new ModelAndView("/bs/itemtype/itemtypeLeft.html");//配置返回路徑
        System.out.println(mavStr);
        mav.addObject("mavStr", mavStr.toString());
        return mav;
    }

DAO層：

List<TreeBuilder.Node> findByItemtypeTree();

html

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>

    
    <link href="/oastyle/css/bootstrap.css" rel="stylesheet">
    
    <script src="/js/jquery.js"></script>
    <script src="/js//bootstrap-treeview.js"></script>
</head>
<body>
<div id="tree"></div>
<script th:inline="javascript">
var tree = eval([[${mavStr}]]);
         function getTree() {
        // Some logic to retrieve, or generate tree structure
        return tree;
    }

    $('#tree').treeview({
        data: getTree(),
        enableLinks: true});

    $('#tree').on('nodeSelected',function(event, data) {
          window.parent.itemtypeRight.location.href="/itemtype/list?upcode="+data.value;
    });

</script>

</body>
</html>

posted @ 2019-05-21 19:08 半導體閱讀(2069) | 評論 (0) | 編輯收藏

技巧

layui

可以做表格排序。

posted @ 2019-05-16 21:14 半導體閱讀(80) | 評論 (0) | 編輯收藏

分頁方式：

前臺：

    //搜索
    function changesearch() {
        $("#queryform").submit();
    }

通過page傳值

包含頁面

<div class="pagelist" th:fragment="page">
    <a th:onclick="javascript:page(0)">[首頁]</a>
    <a th:onclick="javascript:page([[${page.pageNum}]]-1)">[上一頁]</a>
    <a th:onclick="javascript:page([[${page.pageNum}]]+1)">[下一頁]</a>
    <a th:onclick="javascript:page([[${page.pages}]])">[尾頁]</a>
    共[[${page.total}]]條記錄
</div>

//分頁跳轉方法
function page(pageNum) {
$("#start").val(pageNum);
$("#queryform").submit();
}

此種方法可以將搜索查詢框內容通過form表單的方式提交給controller,controller再分頁，但點“下一頁”事件多點二次很容易導致瀏覽器假死。

第二種方式：直接通過href傳值，這種方式不死機。

                        <div class="pagelist">
                        <a th:href="@{/bbs/list(start=0,title=${queryBbs.title})}">[首  頁]</a>
                        <a th:href="@{/bbs/list(start=${page.pageNum-1},title=${queryBbs.title})}">[上一頁]</a>
                        <a th:href="@{/bbs/list(start=${page.pageNum+1},title=${queryBbs.title})}">[下一頁]</a>
                        <a th:href="@{/bbs/list(start=${page.pages},title=${queryBbs.title})}">[尾  頁]</a>
                            共[[${page.total}]]條記錄
                        </div>

posted @ 2019-05-15 15:21 半導體閱讀(121) | 評論 (0) | 編輯收藏

org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing

摘要: 錯誤如下：Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->org.thymeleaf.exceptions.TemplateInputException: An error happened during&nbs... 閱讀全文

posted @ 2019-05-12 15:15 半導體閱讀(7838) | 評論 (0) | 編輯收藏

好看的界面

windows風格
https://www.toufu.xyz

layui

網頁模板素材

http://www.htmlsucai.com/forum-78-1.html

http://www.cssmoban.com/cssthemes/houtaimoban/

http://www.16sucai.com/

https://www.58pic.com/

posted @ 2019-05-11 23:17 半導體閱讀(98) | 評論 (0) | 編輯收藏

Spring+Mybatis 查詢所有數據時發生異常：org.apache.ibatis.reflection.ReflectionException: There is no getter for

Spring+Mybatis框架整合時,根據條件查詢數據，發生異常
Caused by: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'sname' in 'class java.lang.String'

userinfoMapper.xml文件：

<select id="findAll" parameterType="string" resultMap="userinfoMap"> select * from userinfo where sname like '%${sname}%' </select>
UserinfoMapper接口:

public List<Userinfo> findAll(String sname);
解決方法:在參數前加@Param標簽
public List<Userinfo> findAll(@Param("sname") String sname);

posted @ 2019-05-11 16:05 半導體閱讀(1603) | 評論 (0) | 編輯收藏

全選輸出checkbox的值

$("input[name='a']").each(function () {
            Aval = $(this).val();
            alert(Aval);
        });

解釋：取當前頁面所有name='a'的input元素，循環每一個取到的元素,將其value的值賦

給Aval，并輸出。

posted @ 2019-05-11 14:48 半導體閱讀(96) | 評論 (0) | 編輯收藏

mysql8.0使用sqlyog無法連接時

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';
或

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';

如果mysql只能本地連接，不能遠程連接
第一步： update user set host='%' where user='root';
第二步：重啟服務

posted @ 2019-05-06 10:14 半導體閱讀(257) | 評論 (0) | 編輯收藏

jquery常用語法

$(":text[name='username']").val()

$("#logOn").click(function () {
});

1、jquery引入基本語法：

 $(function(){});

2、觸發所有button元素的click事件
    $(":button").click( ); // 調用不帶任何參數的click()函數，會觸發每個匹配元素的click事件.
 3、// 點擊鏈接時，阻止鏈接跳轉
    $("a").click( function(){
        return false;
    } );

posted @ 2019-05-04 21:57 半導體閱讀(100) | 評論 (0) | 編輯收藏

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