uniapp中使用sqlite模块

我就是我 2022-09-01 09:10 722阅读 0赞

### h5+ sqllite 教程地址 ###

https://www.html5plus.org/doc/zh\_cn/sqlite.html

// 创建数据库 ｜ 打开数据库
    function openSqllite() { 
    	return new Promise((resolve, reject) => { 
    		plus.sqlite.openDatabase({ 
    			name: 'life', 					// 数据库名称
    			path: '_doc/life.db',   // 数据库地址
    			success(e) {  resolve(e) },
    			fail(e) {  reject(e) }
    		})
    	})
    }
    
    // 关闭数据库
    function closeSqllite() { 
    	return new Promise((resolve, reject) => { 
    		plus.sqlite.closeDatabase({ 
    			name: 'life',
    			success(e) {  resolve() },
    			fail(e) {  reject() }
    		})
    	})
    }
    
    // 监听数据库是否开启 return type : Boolean
    function isOpen(name, path) { 
    	return plus.sqlite.isOpenDatabase({  name: 'life', path: '_doc/life.db' })
    }
    
    // 执行 sql 语句 for create table
    /* 例子 创建 table 'create table if not exists userInfo ( "index" INTEGER PRIMARY KEY AUTOINCREMENT, 自动增加 "id" TEXT, 字符串 "name" TEXT, "gender" TEXT, "avatar" TEXT )' 添加数据 'insert into userInfo (id,name,gender,avatar) values("'+id+'","'+name+'","'+gender+'","'+avatar+'")' 'insert into userInfo (name, age) values ("demo1", "23")' 删除数据 'delete from '+name+' where '+sol+'="'+qq+'" and '+ww+'='+ee+'' 'delete from '+name+' where '+sol+'="'+qq+'"' 修改数据 UPDATE table_name SET field1=new-value1, field2=new-value2 'update '+listName+' set '+name+'="'+cont+'" where '+use+'="'+sel+'"' 'update '+listName+' set '+name+'="'+cont+'"' */
    function executeSqlCode(sqlCode) { 
    	return new Promise((resolve, reject) => { 
    		plus.sqlite.executeSql({ 
    			name: 'life',
    			sql: sqlCode,   // sql 语句
    			success(e) {  resolve(e) },
    			fail(e) {  reject(e) }
    		})
    	})
    }
    
    // 查询数据
    /* 例子 'select * from '+name+' where '+aa+'='+bb+' and '+cc+'='+dd+'' 'select * from '+name+' where '+aa+'='+bb+'' 'select * from '+name+'' // 高级查询 'select * from '+id+' order by list desc limit 15 offset '+num+'', */
    function selectFromTable(sqlCode) { 
    	return new Promise((resolve, reject) => { 
    		plus.sqlite.selectSql({ 
    			name: 'life',    // 数据库名称
    			sql: sqlCode,
    			success(e) {  resolve(e) },
    			fail(e) {  reject(e) }
    		})
    	})
    }
    
    export default { 
    	openSqllite,
    	closeSqllite,
    	isOpen,
    	executeSqlCode,
    	selectFromTable,
    }

### 调用例子 ###

<template>
    	<view class="container">
    		<button type="default" @click="openSqllite">开启数据库</button>
    		<button type="default" @click="closeSqllite">关闭数据库</button>
    		<button type="default" @click="createTable">创建table</button>
    		<button type="default" @click="addData">添加数据</button>
    		<button type="default" @click="getData">查询数据</button>
    		
    		状态：{
       { status }}
    	</view>
    </template>
    
    <script> import sqlLite from '@/common/sqllite-utils.js'; export default { data() { return { status: ''}}, onLoad() { }, methods: { // 开启数据库 openSqllite() { if (sqlLite.isOpen()) { this.status = '开启成功!' } else { // 开启数据库 sqlLite.openSqllite() .then((e) => this.status = '开启成功!') .catch((e) => this.status = '开启失败!') } }, // 关闭数据库 closeSqllite() { if (sqlLite.isOpen()) { // 关闭数据库 sqlLite.closeSqllite() .then((e) => this.status = '关闭成功!') .catch((e) => this.status = '关闭失败!') } else { this.status = '关闭成功!' } }, // 创建数据库 (index, name, age) createTable() { sqlLite.executeSqlCode( 'create table if not exists userInfo ( "index" INTEGER PRIMARY KEY AUTOINCREMENT,"name" TEXT,"age" TEXT)' ).then((e) => this.status = '创建成功!') .catch((e) => this.status = '创建失败!') }, // 添加数据 addData(){ var name = "demo" var age = "23" sqlLite.executeSqlCode( 'insert into userInfo (name, age) values ("'+name+'","'+age+'")' ).then((e) => this.status = '添加成功!') .catch((e) => this.status = '添加失败!') }, // 查询数据 getData() { var tableName = 'userInfo' sqlLite.selectFromTable( 'select * from '+tableName+'' ).then((date) => this.status = date) .catch((e) => this.status = '查询失败!') } } } </script>
    
    <style> .container { padding: 20px; font-size: 14px; line-height: 24px; } </style>