2019年4月29日随笔档案 - JBOSS 点滴

mysql5.x忘记密码

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

1、停止MySQL服务，输入 net stop mysql 停止服务。

2、切换到MySQL的bin文件下，

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

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

3、输入mysql -uroot -p回车，不用输入密码，直接按回车跳过，

输入： use mysql

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

4、重启服务

posted @ 2024-02-17 15:09 半导体阅读(32) | 评论 (0) | 编辑收藏

微信小程序开发流程

准备工作：
需要https的域名
1、域名申请、备案（我是在阿里云买的服务器，域名也在阿里云购买）
2、域名与IP绑定
3、ssl安全证书申请（https）
4、下载ssl安全证书布署在tomcat服务器
4、在云服务器tomcat中布署https

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

ps:任何操作不会，直接打阿里云客服电话 95187

小程序开发流程：
1、在微信官网注册帐号
2、下载小程序开发工具
3、小程序开发、上传
4、小程序送审，审核通过即可分享给你的朋友

posted @ 2020-08-08 10:11 半导体阅读(109) | 评论 (0) | 编辑收藏

mall 工程创建踩坑

新建项目坑

www.macrozheng.com项目，打开maven总是引入失败，后来

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

https://blog.csdn.net/ken_ding/article/details/85623092这个是前端有可能遇见的坑的解决办法

安装环境文档：

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

posted @ 2020-07-20 21:52 半导体阅读(112) | 评论 (0) | 编辑收藏

springboot 打包后，在dos命令行运行提示没有主清单属性的解决办法

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.双击IDEA右侧Maven Projects的lifecycle下的package，打包成jar，重新执行以上命令。

posted @ 2020-06-27 16:42 半导体阅读(200) | 评论 (0) | 编辑收藏

MyBatis出现org.apache.ibatis.executor.ExecutorException异常

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: 张(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: 张三
    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

上网找了一些答案也没有解决我的问题，

后来发现原来是User类的构造函数问题，找不到相关的构造函数；试着在User中加一个默认的构造函数，就解决了。。。

希望能帮到大家。

默认的构造函数在创建构造函数后，不会自动创建默认构造函数

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

这种错也是同样的问题，

加上无参构造函数就可以了。

当创建对象来接受sql结果时会遍历实体类的构造方法找到与之匹配的，如果实体类中有构造方法了但是参数不匹配的话就会报上述错误，此时添加无参构造方法（默认的构造方法），会走其他方法，

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

posted @ 2020-03-25 20:01 半导体阅读(5524) | 评论 (0) | 编辑收藏

idea jsp代码不提示Java代码

在<head>里写java代码有提示，在<body>里不写%>就有提示。

这是由于按提示快捷键alt+enter导致。解决方法一直未找到合适的。
解决方法：

posted @ 2020-03-08 20:11 半导体阅读(241) | 评论 (0) | 编辑收藏

项目管理推荐好文

挣值管理（PV、EV、AC、SV、CV、SPI、CPI）记忆之我见 http://www.cnitpm.com/pm/7707.html https://blog.csdn.net/weixin_38197294/article/details/79852129

posted @ 2020-03-08 11:41 半导体阅读(108) | 评论 (0) | 编辑收藏

jquery传参及获取方式

html写法

<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>

获取值方式一

获取值方式二：

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

posted @ 2020-02-08 18:36 半导体阅读(156) | 评论 (0) | 编辑收藏

spring boot结合thymeleaf通过后台传入的数值循环生成标签

spring boot结合thymeleaf通过后台传入的数值循环生成标签

posted @ 2019-10-16 16:06 半导体阅读(325) | 评论 (0) | 编辑收藏

模态框传值

模态框传值：

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

posted @ 2019-10-12 16:35 半导体阅读(144) | 评论 (0) | 编辑收藏

Bootstrap 模态框 + iframe > 打开子页面 > 数据传输/关闭模态框

摘要: 父页面bootstrap模态框: <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="false" > <div class="modal-dialog modal-lg"> ... 阅读全文

posted @ 2019-05-28 21:23 半导体阅读(327) | 评论 (0) | 编辑收藏

mybatis学习之路----mysql批量新增数据

来源：

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

   mysql新增语句
insert into 表名（字段，字段。。。） values ( 值，值。。。)；此种适合单条插入。
批量插入，
   一种可以在代码中循环着执行上面的语句，但是这种效率太差，下面会有对比，看看它有多差。
另一种，可以用mysql支持的批量插入语句，
insert into
   表名（字段，字段。。。） values ( 值，值。。。)，( 值，值。。。)，( 值，值。。。)....
这种方式相比起来，更高效。
实现过程mapper.xml

<!-- 跟自增主键方式相比，这里的不同之处只有两点

1 insert语句需要写id字段了，并且 values里面也不能省略

2 selectKey 的order属性需要写成BEFORE 因为这样才能将生成的uuid主键放入到model中，

这样后面的insert的values里面的id才不会获取为空

跟自增主键相比就这点区别，当然了这里的获取主键id的方式为 select uuid()

当然也可以另写别生成函数。-->

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循环集合用的

collection="list" 接收的map集合中的key 用以循环key对应的属性

separator="," 表示每次循环完毕，在sql后面放一个逗号

item="cus" 每次循环的实体对象名称随意-->

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

</foreach>

</insert>

实体model对象

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);

实现

实现

   /**

     * 新增数据

     * @param customer

     * @return

     */

    public int add(Customer customer) {

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

    }

    /**

     * 批量插入数据

     * @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 半导体阅读(132) | 评论 (0) | 编辑收藏

springboot中树形结构的开发

POM中引入

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

实体类创建

import net.sf.json.JSONArray;

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

/**
* 构造目录JSON树
* 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;
    }

    // 构建JSON树形结构
    public String buildJSONTree() {
        List<Node> nodeTree = buildTree();
        JSONArray jsonArray = JSONArray.fromObject(nodeTree);
        return jsonArray.toString();
    }

    // 构建树形结构
    public List<Node> buildTree() {
        List<Node> treeNodes = new ArrayList<>();
        List<Node> rootNodes = getRootNodes();
        for (Node rootNode : rootNodes) {
            buildChildNodes(rootNode);
            treeNodes.add(rootNode);
        }
        return treeNodes;
    }

    // 递归子节点
    public void buildChildNodes(Node node) {
        List<Node> children = getChildNodes(node);
        if (!children.isEmpty()) {
            for (Node child : children) {
                buildChildNodes(child);
            }
            node.setChildren(children);
        }
    }

    // 获取父节点下所有的子节点
    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;
    }

    // 判断是否为根节点
    public boolean rootNode(Node node) {
        boolean isRootNode = true;
        for (Node n : nodes) {
            if (node.getPid().equals(n.getId())) {
                isRootNode = false;
                break;
            }
        }
        return isRootNode;
    }

    // 获取集合中所有的根节点
    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:返回结果

    //树形结构
    @RequestMapping("left")
    ModelAndView left() throws JSONException {
        String mavStr = "";
        BsItemtype queryItemtype = new BsItemtype();
        //查询根目录树
      //  queryItemtype.setUpcode("00");
        // 获取全部目录节点
        List<TreeBuilder.Node> itemtypeTree = itemtypeService.findByItemtypeTree();

        // 拼装树形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");//配置返回路径
        System.out.println(mavStr);
        mav.addObject("mavStr", mavStr.toString());
        return mav;
    }

DAO层：

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 半导体阅读(2062) | 评论 (0) | 编辑收藏

技巧

layui

可以做表格排序。

posted @ 2019-05-16 21:14 半导体阅读(78) | 评论 (0) | 编辑收藏

分页方式：

前台：

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

通过page传值

包含页面

<div class="pagelist" th:fragment="page">
    <a th:onclick="javascript:page(0)">[首页]</a>
    <a th:onclick="javascript:page([[${page.pageNum}]]-1)">[上一页]</a>
    <a th:onclick="javascript:page([[${page.pageNum}]]+1)">[下一页]</a>
    <a th:onclick="javascript:page([[${page.pages}]])">[尾页]</a>
    共[[${page.total}]]条记录
</div>

//分页跳转方法
function page(pageNum) {
$("#start").val(pageNum);
$("#queryform").submit();
}

此种方法可以将搜索查询框内容通过form表单的方式提交给controller,controller再分页，但点“下一页”事件多点二次很容易导致浏览器假死。

第二种方式：直接通过href传值，这种方式不死机。

                        <div class="pagelist">
                        <a th:href="@{/bbs/list(start=0,title=${queryBbs.title})}">[首  页]</a>
                        <a th:href="@{/bbs/list(start=${page.pageNum-1},title=${queryBbs.title})}">[上一页]</a>
                        <a th:href="@{/bbs/list(start=${page.pageNum+1},title=${queryBbs.title})}">[下一页]</a>
                        <a th:href="@{/bbs/list(start=${page.pages},title=${queryBbs.title})}">[尾  页]</a>
                            共[[${page.total}]]条记录
                        </div>

posted @ 2019-05-15 15:21 半导体阅读(116) | 评论 (0) | 编辑收藏

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

摘要: 错误如下：Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->org.thymeleaf.exceptions.TemplateInputException: An error happened during&nbs... 阅读全文

posted @ 2019-05-12 15:15 半导体阅读(7833) | 评论 (0) | 编辑收藏

好看的界面

windows风格
https://www.toufu.xyz

layui

网页模板素材

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 半导体阅读(98) | 评论 (0) | 编辑收藏

Spring+Mybatis 查询所有数据时发生异常：org.apache.ibatis.reflection.ReflectionException: There is no getter for

Spring+Mybatis框架整合时,根据条件查询数据，发生异常
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);
解决方法:在参数前加@Param标签
public List<Userinfo> findAll(@Param("sname") String sname);

posted @ 2019-05-11 16:05 半导体阅读(1599) | 评论 (0) | 编辑收藏

全选输出checkbox的值

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

解释：取当前页面所有name='a'的input元素，循环每一个取到的元素,将其value的值赋

给Aval，并输出。

posted @ 2019-05-11 14:48 半导体阅读(91) | 评论 (0) | 编辑收藏

mysql8.0使用sqlyog无法连接时

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只能本地连接，不能远程连接
第一步： update user set host='%' where user='root';
第二步：重启服务

posted @ 2019-05-06 10:14 半导体阅读(253) | 评论 (0) | 编辑收藏

jquery常用语法

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

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

1、jquery引入基本语法：

 $(function(){});

2、触发所有button元素的click事件
    $(":button").click( ); // 调用不带任何参数的click()函数，会触发每个匹配元素的click事件.
 3、// 点击链接时，阻止链接跳转
    $("a").click( function(){
        return false;
    } );

posted @ 2019-05-04 21:57 半导体阅读(96) | 评论 (0) | 编辑收藏

springboot+ssm+mysql 错误记录

HikariPool-1 - Driver does not support get/set network timeout for connections. (com.mysql.jdbc.JDBC4Connection.getNetworkTimeout()I)

解决办法：在application.properties数据库连接中增加：&serverTimezone=UTC
Registered driver with driverClassName=com.mysql.jdbc.Driver was not found, trying direct instantiation.
解决办法：打开mysql，输入set global time_zone='+8:00';
还有给我自己提个醒，报错信息千万别只看一句，如果第一句报错没给你答案，后面的报错信息继续看。

posted @ 2019-04-29 23:05 半导体阅读(504) | 评论 (0) | 编辑收藏

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