java的代码记录

Excel操作代码记录：

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306


public class ImportExcelHelper<T> {
    /**
     * 返回解析后的List
     *
     * @return java.util.List<T> 解析后的List
     * @param: fileName 文件名
     * @param: clazz Excel对应属性名
     * @param: sheetNo 要解析的sheet
     * @param: headRowNumber 正文起始行
     */
    public List<T> getList(MultipartFile file, Class<T> clazz, Integer sheetNo, Integer headRowNumber) {
        ImportExcelListener<T> listener = new ImportExcelListener<>(headRowNumber);
        CountDownLatch latch = new CountDownLatch(1);
        Thread t1=  new Thread(() -> {
            while (!Thread.currentThread().isInterrupted()) {
                try {
                    EasyExcel.read(file.getInputStream(), clazz, listener).extraRead(CellExtraTypeEnum.MERGE)
                            .sheet(sheetNo).headRowNumber(headRowNumber).doRead();
                } catch (Exception e) {
                    log.error(e.getMessage());
                }
                latch.countDown();
            }
            System.err.println("执行结束");
        });
        t1.start();
        try {
            latch.await();
        } catch (InterruptedException e) {
        }
        List<CellExtra> extraMergeInfoList = listener.getExtraMergeInfoList();
        //没有合并单元格情况，直接返回即可
        if (isEmpty(extraMergeInfoList)) {
            return listener.getData();
        }
        CountDownLatch computerLatch = new CountDownLatch(1);
        AtomicReference<List<T>> data = new AtomicReference<>();
        Thread t2=new Thread(() -> {
            while (!Thread.currentThread().isInterrupted()) {
                //存在有合并单元格时，自动获取值，并校对
                data.set(explainMergeData(listener.getData(), extraMergeInfoList, headRowNumber));
                computerLatch.countDown();
            }
            System.err.println("执行结束");
        });
        t2.start();
        try {
            computerLatch.await();
        } catch (InterruptedException e) {
        }
        t1.interrupt();
        t2.interrupt();
        return data.get();
    }

    /**
     * 处理合并单元格
     *
     * @param data               解析数据
     * @param extraMergeInfoList 合并单元格信息
     * @param headRowNumber      起始行
     * @return 填充好的解析数据
     */
    private List<T> explainMergeData(List<T> data, List<CellExtra> extraMergeInfoList, Integer headRowNumber) {
        //循环所有合并单元格信息
        extraMergeInfoList.forEach(cellExtra -> {
            int firstRowIndex = cellExtra.getFirstRowIndex() - headRowNumber;
            int lastRowIndex = cellExtra.getLastRowIndex() - headRowNumber;
            int firstColumnIndex = cellExtra.getFirstColumnIndex();
            int lastColumnIndex = cellExtra.getLastColumnIndex();
            //获取初始值
            Object initValue = getInitValueFromList(firstRowIndex, firstColumnIndex, data);
            //设置值
            for (int i = firstRowIndex; i <= lastRowIndex; i++) {
                for (int j = firstColumnIndex; j <= lastColumnIndex; j++) {
                    setInitValueToList(initValue, i, j, data);
                }
            }
        });
        return data;
    }

    /**
     * 设置合并单元格的值
     *
     * @param filedValue  值
     * @param rowIndex    行
     * @param columnIndex 列
     * @param data        解析数据
     */
    private void setInitValueToList(Object filedValue, Integer rowIndex, Integer columnIndex, List<T> data) {
        T object = data.get(rowIndex);

        for (Field field : object.getClass().getDeclaredFields()) {
            //提升反射性能，关闭安全检查
            field.setAccessible(true);
            ExcelProperty annotation = field.getAnnotation(ExcelProperty.class);
            if (annotation != null) {
                if (annotation.index() == columnIndex) {
                    try {
                        field.set(object, filedValue);
                        break;
                    } catch (IllegalAccessException e) {
                        log.error("设置合并单元格的值异常：{}", e.getMessage());
                    }
                }
            }
        }
    }


    /**
     * 获取合并单元格的初始值
     * rowIndex对应list的索引
     * columnIndex对应实体内的字段
     *
     * @param firstRowIndex    起始行
     * @param firstColumnIndex 起始列
     * @param data             列数据
     * @return 初始值
     */
    private Object getInitValueFromList(Integer firstRowIndex, Integer firstColumnIndex, List<T> data) {
        Object filedValue = null;
        T object = data.get(firstRowIndex);
        for (Field field : object.getClass().getDeclaredFields()) {
            //提升反射性能，关闭安全检查
            field.setAccessible(true);
            ExcelProperty annotation = field.getAnnotation(ExcelProperty.class);
            if (annotation != null) {
                if (annotation.index() == firstColumnIndex) {
                    try {
                        filedValue = field.get(object);
                        break;
                    } catch (IllegalAccessException e) {
                        log.error("设置合并单元格的初始值异常：{}", e.getMessage());
                    }
                }
            }
        }
        return filedValue;
    }

    /**
     * 判断集合是否为空
     *
     * @param collection
     * @return
     */
    private boolean isEmpty(Collection<?> collection) {
        return collection == null || collection.isEmpty();
    }

}
public class ImportExcelHelper<T> {
    /**
     * 返回解析后的List
     *
     * @return java.util.List<T> 解析后的List
     * @param: fileName 文件名
     * @param: clazz Excel对应属性名
     * @param: sheetNo 要解析的sheet
     * @param: headRowNumber 正文起始行
     */
    public List<T> getList(MultipartFile file, Class<T> clazz, Integer sheetNo, Integer headRowNumber) {
        ImportExcelListener<T> listener = new ImportExcelListener<>(headRowNumber);
        CountDownLatch latch = new CountDownLatch(1);
        Thread t1=  new Thread(() -> {
            while (!Thread.currentThread().isInterrupted()) {
                try {
                    EasyExcel.read(file.getInputStream(), clazz, listener).extraRead(CellExtraTypeEnum.MERGE)
                            .sheet(sheetNo).headRowNumber(headRowNumber).doRead();
                } catch (Exception e) {
                    log.error(e.getMessage());
                }
                latch.countDown();
            }
            System.err.println("执行结束");
        });
        t1.start();
        try {
            latch.await();
        } catch (InterruptedException e) {
        }
        List<CellExtra> extraMergeInfoList = listener.getExtraMergeInfoList();
        //没有合并单元格情况，直接返回即可
        if (isEmpty(extraMergeInfoList)) {
            return listener.getData();
        }
        CountDownLatch computerLatch = new CountDownLatch(1);
        AtomicReference<List<T>> data = new AtomicReference<>();
        Thread t2=new Thread(() -> {
            while (!Thread.currentThread().isInterrupted()) {
                //存在有合并单元格时，自动获取值，并校对
                data.set(explainMergeData(listener.getData(), extraMergeInfoList, headRowNumber));
                computerLatch.countDown();
            }
            System.err.println("执行结束");
        });
        t2.start();
        try {
            computerLatch.await();
        } catch (InterruptedException e) {
        }
        t1.interrupt();
        t2.interrupt();
        return data.get();
    }

    /**
     * 处理合并单元格
     *
     * @param data               解析数据
     * @param extraMergeInfoList 合并单元格信息
     * @param headRowNumber      起始行
     * @return 填充好的解析数据
     */
    private List<T> explainMergeData(List<T> data, List<CellExtra> extraMergeInfoList, Integer headRowNumber) {
        //循环所有合并单元格信息
        extraMergeInfoList.forEach(cellExtra -> {
            int firstRowIndex = cellExtra.getFirstRowIndex() - headRowNumber;
            int lastRowIndex = cellExtra.getLastRowIndex() - headRowNumber;
            int firstColumnIndex = cellExtra.getFirstColumnIndex();
            int lastColumnIndex = cellExtra.getLastColumnIndex();
            //获取初始值
            Object initValue = getInitValueFromList(firstRowIndex, firstColumnIndex, data);
            //设置值
            for (int i = firstRowIndex; i <= lastRowIndex; i++) {
                for (int j = firstColumnIndex; j <= lastColumnIndex; j++) {
                    setInitValueToList(initValue, i, j, data);
                }
            }
        });
        return data;
    }

    /**
     * 设置合并单元格的值
     *
     * @param filedValue  值
     * @param rowIndex    行
     * @param columnIndex 列
     * @param data        解析数据
     */
    private void setInitValueToList(Object filedValue, Integer rowIndex, Integer columnIndex, List<T> data) {
        T object = data.get(rowIndex);

        for (Field field : object.getClass().getDeclaredFields()) {
            //提升反射性能，关闭安全检查
            field.setAccessible(true);
            ExcelProperty annotation = field.getAnnotation(ExcelProperty.class);
            if (annotation != null) {
                if (annotation.index() == columnIndex) {
                    try {
                        field.set(object, filedValue);
                        break;
                    } catch (IllegalAccessException e) {
                        log.error("设置合并单元格的值异常：{}", e.getMessage());
                    }
                }
            }
        }
    }


    /**
     * 获取合并单元格的初始值
     * rowIndex对应list的索引
     * columnIndex对应实体内的字段
     *
     * @param firstRowIndex    起始行
     * @param firstColumnIndex 起始列
     * @param data             列数据
     * @return 初始值
     */
    private Object getInitValueFromList(Integer firstRowIndex, Integer firstColumnIndex, List<T> data) {
        Object filedValue = null;
        T object = data.get(firstRowIndex);
        for (Field field : object.getClass().getDeclaredFields()) {
            //提升反射性能，关闭安全检查
            field.setAccessible(true);
            ExcelProperty annotation = field.getAnnotation(ExcelProperty.class);
            if (annotation != null) {
                if (annotation.index() == firstColumnIndex) {
                    try {
                        filedValue = field.get(object);
                        break;
                    } catch (IllegalAccessException e) {
                        log.error("设置合并单元格的初始值异常：{}", e.getMessage());
                    }
                }
            }
        }
        return filedValue;
    }

    /**
     * 判断集合是否为空
     *
     * @param collection
     * @return
     */
    private boolean isEmpty(Collection<?> collection) {
        return collection == null || collection.isEmpty();
    }

}

java 获取class反射对象

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91


import org.springframework.core.BridgeMethodResolver;
import org.springframework.core.DefaultParameterNameDiscoverer;
import org.springframework.core.MethodParameter;
import org.springframework.core.ParameterNameDiscoverer;
import org.springframework.core.annotation.AnnotatedElementUtils;
import org.springframework.core.annotation.SynthesizingMethodParameter;
import org.springframework.web.method.HandlerMethod;
 
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
 
/**
 * 类工具类
 *
 */
public class ClassUtil extends org.springframework.util.ClassUtils {
 
   private static final ParameterNameDiscoverer PARAMETER_NAME_DISCOVERER = new DefaultParameterNameDiscoverer();
 
   /**
    * 获取方法参数信息
    *
    * @param constructor    构造器
    * @param parameterIndex 参数序号
    * @return {MethodParameter}
    */
   public static MethodParameter getMethodParameter(Constructor<?> constructor, int parameterIndex) {
      MethodParameter methodParameter = new SynthesizingMethodParameter(constructor, parameterIndex);
      methodParameter.initParameterNameDiscovery(PARAMETER_NAME_DISCOVERER);
      return methodParameter;
   }
 
   /**
    * 获取方法参数信息
    *
    * @param method         方法
    * @param parameterIndex 参数序号
    * @return {MethodParameter}
    */
   public static MethodParameter getMethodParameter(Method method, int parameterIndex) {
      MethodParameter methodParameter = new SynthesizingMethodParameter(method, parameterIndex);
      methodParameter.initParameterNameDiscovery(PARAMETER_NAME_DISCOVERER);
      return methodParameter;
   }
 
   /**
    * 获取Annotation
    *
    * @param method         Method
    * @param annotationType 注解类
    * @param <A>            泛型标记
    * @return {Annotation}
    */
   public static <A extends Annotation> A getAnnotation(Method method, Class<A> annotationType) {
      Class<?> targetClass = method.getDeclaringClass();
      // The method may be on an interface, but we need attributes from the target class.
      // If the target class is null, the method will be unchanged.
      Method specificMethod = ClassUtil.getMostSpecificMethod(method, targetClass);
      // If we are dealing with method with generic parameters, find the original method.
      specificMethod = BridgeMethodResolver.findBridgedMethod(specificMethod);
      // 先找方法，再找方法上的类
      A annotation = AnnotatedElementUtils.findMergedAnnotation(specificMethod, annotationType);
      ;
      if (null != annotation) {
         return annotation;
      }
      // 获取类上面的Annotation，可能包含组合注解，故采用spring的工具类
      return AnnotatedElementUtils.findMergedAnnotation(specificMethod.getDeclaringClass(), annotationType);
   }
 
   /**
    * 获取Annotation
    *
    * @param handlerMethod  HandlerMethod
    * @param annotationType 注解类
    * @param <A>            泛型标记
    * @return {Annotation}
    */
   public static <A extends Annotation> A getAnnotation(HandlerMethod handlerMethod, Class<A> annotationType) {
      // 先找方法，再找方法上的类
      A annotation = handlerMethod.getMethodAnnotation(annotationType);
      if (null != annotation) {
         return annotation;
      }
      // 获取类上面的Annotation，可能包含组合注解，故采用spring的工具类
      Class<?> beanType = handlerMethod.getBeanType();
      return AnnotatedElementUtils.findMergedAnnotation(beanType, annotationType);
   }
 
}

java k8s执行命令

1
2
3
4
5
6


ExecWatch watch = client.pods()
		.inNamespace(nsName)
		.withName(podName)
		.inContainer(containerName) // 如果Pod中只有一个容器，不需要指定
		.writingOutput(System.out)
		.exec("sh", "-c", cmd);