Gradle使用异常集合

た入场券 2023-06-15 07:30 7阅读 0赞

### 一、Could not find method leftShift() for arguments ###

**1. 异常背景：在执行gradle脚本（build.gradle****）命令gradle -q show时出错**

**2. 异常详情：**

FAILURE: Build failed with an exception.
    
    * Where:
    Build file 'F:\test\build.gradle' line: 2
    
    * What went wrong:
    A problem occurred evaluating root project 'test'.
    > Could not find method leftShift() for arguments [build_4812tmlsh4hbu49ky5fvjmj67$_run_closure1@260d7e26] on task ':show' of type org.gradle.api.DefaultTask.
    
    * Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
    
    * Get more help at https://help.gradle.org
    
    BUILD FAILED in 2s

**3. 异常原因：操作符 `<<` 在Gradle 4.x中被弃用（deprecated），并且在Gradle 5.0 被移除（removed）**

**4. 解决方法：(去掉<<)将脚本**

apply plugin: 'java'
    task show << {
        println relativePath(compileJava.destinationDir)
        println relativePath(processResources.destinationDir)
    }

**修改为 **

apply plugin: 'java'
    task show {
        println relativePath(compileJava.destinationDir)
        println relativePath(processResources.destinationDir)
    }

**5. 查看效果：**

![20191121154738378.png][]

### 二、Cannot add task 'wrapper' as a task with that name already exists. ###

**1.异常背景：在执行gradle脚本（build.gradle）命令gradle wrapper时出错**

**2. 异常详情：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz_size_16_color_FFFFFF_t_70][]

**3. 异常原因：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz_size_16_color_FFFFFF_t_70 1][]

**4. 解决方法：**

**将build.gradle中内容**

task wrapper(type: Wrapper) {
        gradleVersion = '6.2.2'
    }

**修改为**

wrapper {
        gradleVersion = '6.2.2'
    }

[20191121154738378.png]: https://img-blog.csdnimg.cn/20191121154738378.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200325163142706.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200325163549979.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pzeDE4MjczMTE3MDAz,size_16,color_FFFFFF,t_70