string1=$(echo -n "your_string") string2=$(echo -n "your_string") if [ "$string1" == "$string2" ]; then echo "Strings are equal." else echo "Strings are not equal." fi 2. 使用 tr 命令去除所有空白字符 代码语言:txt 复制 string
boolean equalsIgnoreCase(String anotherString) 将此String 与另一个 String 进行比较,不考虑大小写。 if (s1.equals(s2)) { } 注意:一定要保证s1 != null,否则会抛出异常。 StringUtils.equals & StringUtils.equalsIgnoreCase 在Apache Commons Lang中的StringUtils类提供了equals和equalsIgnoreCase静态方法,它的好处是...
if [ "$a" = "$b" ] then echo "Equals" fi 或 if [ "$a" != "Robert" ] then echo "Not equals" fi 2. 非空及空字符比较 if [ -z $a ] then echo "Empty String" fi 上面这样好吗?。。。这下你就不会上当了吧。。。哈哈,应该象下面这样写。 if [ -z "$a" ] then echo "Emp...
string1 > string2如果对string1和string2按字母顺序进行排序,string1排在string2后面 图表3: Bash 字符串逻辑操作符 首先,检查字符串长度。比较表达式中$MyVar两边的双引号不能省略(你仍应该在目录~/testdir下 )。 [student@studentvm1 testdir]$ MyVar="" ; if [ -z "" ] ; then echo "MyVar is zer...
echo "Equals" fi 或 if [ "$a" != "Robert" ] then echo "Not equals" fi 2. 非空及空字符比较 if [ -z $a ] then echo "Empty String" fi 上面这样好吗?。。。这下你就不会上当了吧。。。哈哈,应该象下面这样写。 if [ -z "$a" ] then echo "Empty String" ...
How to check if a command succeeds or failed? How to do string comparison and check if a string equals to a value? How to check if a string is in an array? How to use the Bash ternary operator? How to negate an if condition in a Bash if statement? (if not command or if not ...
if 先来个实例: x=5; if [ $x = 5 ]; then echo 'x equals 5...case case 其实就是我们熟悉的那个 swich ,但语法形式上有很大的不同。...循环 bash 中有 for 和 while 两种常见的循环体,我们应该都很熟悉。 for 直接上实例,批量修改文件名。...; done 语法其实很明朗: for variable [in word...
not equals:-ne is empty:-z if[[1-eq1]];if[[-z$USER]]; Elif if[[-z$USER]];thenecho"user is empty"elif[[1-eq1]];thenecho"1==1"elseecho"false"fi Ternary [[$USER='username']]&&echo"yes"||echo"no" Exp: check_status(){## Get HTTP status codelocalstatus=$(curl-ILs$1|...
if [[ $USER = 'username' ]]; then echo "true" else echo "false" fi 1. 2. 3. 4. 5. not equal:!= numeric equality:-eq not equals:-ne is empty:-z if [[ 1 -eq 1 ]]; if [[ -z $USER ]]; 1. 2. 3. Elif if [[ -z $USER ]]; then ...
private static boolean isEmpty(String content) { if (content == null) { return true; } else { return "".equals(content.trim()) || "null".equalsIgnoreCase(content.trim()); } } private static boolean isNotEmpty(String content) {