com.jfinal.render

Class QrCodeRender

java.lang.Object

com.jfinal.render.Render

com.jfinal.render.QrCodeRender

public class QrCodeRender
extends Render

QrCodeRender 生成二维码

Field Summary

Fields inherited from class com.jfinal.render.Render

request, response, view

Constructor Summary

Constructors

Constructor and Description
QrCodeRender(String content, int width, int height) 构造方法，经测试不指定纠错参数时，默认使用的是 'L' 最低级别纠错参数
QrCodeRender(String content, int width, int height, char errorCorrectionLevel) 带有纠错级别参数的构造方法，纠错能力从高到低共有四个级别：'H'、'Q'、'M'、'L'
QrCodeRender(String content, int width, int height, com.google.zxing.qrcode.decoder.ErrorCorrectionLevel errorCorrectionLevel) 带有纠错级别参数的构造方法，生成带有 logo 的二维码采用纠错原理 使用 ErrorCorrectionLevel.H 参数提升纠错能力 ErrorCorrectionLevel 是枚举类型，纠错能力从高到低共有四个级别： H = ~30% correction Q = ~25% correction M = ~15% correction L = ~7% 使用的时候直接这样：ErrorCorrectionLevel.H

Method Summary

Modifier and Type	Method and Description
void	render() Render to client

Methods inherited from class com.jfinal.render.Render

getDevMode, getEncoding, getView, setContext, setContext, setView

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QrCodeRender

public QrCodeRender(String content,
                    int width,
                    int height)

构造方法，经测试不指定纠错参数时，默认使用的是 'L' 最低级别纠错参数

Parameters:

content - 二维码携带内容

width - 二维码宽度

height - 二维码高度

QrCodeRender

public QrCodeRender(String content,
                    int width,
                    int height,
                    com.google.zxing.qrcode.decoder.ErrorCorrectionLevel errorCorrectionLevel)

带有纠错级别参数的构造方法，生成带有 logo 的二维码采用纠错原理 使用 ErrorCorrectionLevel.H 参数提升纠错能力 ErrorCorrectionLevel 是枚举类型，纠错能力从高到低共有四个级别： H = ~30% correction Q = ~25% correction M = ~15% correction L = ~7% 使用的时候直接这样：ErrorCorrectionLevel.H

QrCodeRender

public QrCodeRender(String content,
                    int width,
                    int height,
                    char errorCorrectionLevel)

带有纠错级别参数的构造方法，纠错能力从高到低共有四个级别：'H'、'Q'、'M'、'L'

Method Detail

render

public void render()

Description copied from class: Render

Render to client

Specified by:

render in class Render