将对象的null字段赋值为默认值

import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Date;

import org.apache.commons.lang.ArrayUtils;


public class BeanHelper {
    /**
     * 将对象的null字段赋值为默认值
     *
     * @param cls
     * @param <T>
     * @return
     */
    public static <T> T noNullStringAttr(T cls) {
        Field[] fields = cls.getClass().getDeclaredFields();
        Field[] parendFields = cls.getClass().getSuperclass().getDeclaredFields();

        if (ArrayUtils.isEmpty(fields) && ArrayUtils.isEmpty(parendFields)) {
            return cls;
        }
        for (Field field : fields) {
            if ("String".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, "");
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if ("Date".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, new Date());
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if ("int".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, 0);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            if ("Integer".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, 0);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            if ("long".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, 0L);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if ("Long".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, 0L);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if ("Float".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, Float.parseFloat("0"));
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            if ("float".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, Float.parseFloat("0"));
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            if ("BigDecimal".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, BigDecimal.ZERO);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            if ("List".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, new ArrayList<>());
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        for (Field field : parendFields) {
            if ("String".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, "");
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if ("Date".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, new Date());
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if ("int".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, 0);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            if ("Integer".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, 0);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            if ("long".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, 0L);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if ("Long".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, 0L);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if ("Float".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, Float.parseFloat("0"));
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if ("BigDecimal".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, BigDecimal.ZERO);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            if ("float".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, Float.parseFloat("0"));
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if ("List".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value == null) {
                        field.set(cls, new ArrayList<>());
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        return cls;
    }

    /**
     * 将BigDecimal类型的字段转换成万元显示
     *
     * @param cls
     * @param <T>
     * @return
     */
    public static <T> T toWan(T cls) {
        Field[] fields = cls.getClass().getDeclaredFields();

        if (ArrayUtils.isEmpty(fields)) {
            return cls;
        }
        for (Field field : fields) {
            if ("BigDecimal".equals(field.getType().getSimpleName())) {
                field.setAccessible(true);
                try {
                    Object value = field.get(cls);
                    if (value != null) {
                        field.set(cls, StringUtil.getNumberWan((BigDecimal) value));
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

        }
        return cls;
    }
}