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package cn.how2j.test;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.TYPE;
import java.lang.annotation.Documented;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;
import org.junit.Test;
import cn.hutool.core.convert.Convert;
import cn.hutool.core.util.EscapeUtil;
import cn.hutool.core.util.ReflectUtil;
import cn.hutool.core.util.StrUtil;
public class TestEscape {
@Test
@Comment("转义与反转义")
public void test2() {
String s1 = "";
String s2 = EscapeUtil.escapeHtml4(s1);
String s3 = EscapeUtil.unescapeHtml4(s2);
p2("原数据",s1, "转义后",s2);
p2("转义后",s2, "原数据",s3);
}
private String preComment = null;
private void c(String msg) {
System.out.printf("\t备注:%s%n",msg);
}
private void p1(String type1, Object value1, String type2, Object value2) {
p(type1, value1, type2, value2, "format1");
}
private void p2(String type1, Object value1, String type2, Object value2) {
p(type1, value1, type2, value2, "format2");
}
private void p3(String type1, Object value1) {
p(type1, value1, "", "", "format3");
}
private void p(String type1, Object value1, String type2, Object value2, String format) {
try {
throw new Exception();
} catch (Exception e) {
String methodName = getTestMethodName(e.getStackTrace());
Method m =ReflectUtil.getMethod(this.getClass(), methodName);
Comment annotation = m.getAnnotation(Comment.class);
if(null!=annotation) {
String comment= annotation.value();
if(!comment.equals(preComment)) {
System.out.printf("%n%s 例子: %n%n",comment);
preComment = comment;
}
}
}
int padLength = 12;
type1=StrUtil.padEnd(type1,padLength,Convert.toSBC(" ").charAt(0));
type2=StrUtil.padEnd(type2,padLength,Convert.toSBC(" ").charAt(0));
if("format1".equals(format)) {
System.out.printf("\t%s的:\t\"%s\" %n\t被转换为----->%n\t%s的 :\t\"%s\" %n%n",type1,value1, type2, value2);
}
if("format2".equals(format)) {
System.out.printf("\t基于 %s:\t\"%s\" %n\t获取 %s:\t\"%s\"%n%n",type1,value1, type2, value2);
}
if("format3".equals(format)) {
System.out.printf("\t%s:\t\"%s\" %n\t%n",type1,value1);
}
}
private String getTestMethodName(StackTraceElement[] stackTrace) {
for (StackTraceElement se : stackTrace) {
String methodName = se.getMethodName();
if(methodName.startsWith("test"))
return methodName;
}
return null;
}
@Target({METHOD,TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface Comment {
String value();
}
}
package cn.how2j.test;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.TYPE;
import java.lang.annotation.Documented;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;
import org.junit.Test;
import cn.hutool.core.convert.Convert;
import cn.hutool.core.util.EscapeUtil;
import cn.hutool.core.util.ReflectUtil;
import cn.hutool.core.util.StrUtil;
public class TestEscape {
@Test
@Comment("转义与反转义")
public void test2() {
String s1 = "";
String s2 = EscapeUtil.escapeHtml4(s1);
String s3 = EscapeUtil.unescapeHtml4(s2);
p2("原数据",s1, "转义后",s2);
p2("转义后",s2, "原数据",s3);
}
private String preComment = null;
private void c(String msg) {
System.out.printf("\t备注:%s%n",msg);
}
private void p1(String type1, Object value1, String type2, Object value2) {
p(type1, value1, type2, value2, "format1");
}
private void p2(String type1, Object value1, String type2, Object value2) {
p(type1, value1, type2, value2, "format2");
}
private void p3(String type1, Object value1) {
p(type1, value1, "", "", "format3");
}
private void p(String type1, Object value1, String type2, Object value2, String format) {
try {
throw new Exception();
} catch (Exception e) {
String methodName = getTestMethodName(e.getStackTrace());
Method m =ReflectUtil.getMethod(this.getClass(), methodName);
Comment annotation = m.getAnnotation(Comment.class);
if(null!=annotation) {
String comment= annotation.value();
if(!comment.equals(preComment)) {
System.out.printf("%n%s 例子: %n%n",comment);
preComment = comment;
}
}
}
int padLength = 12;
type1=StrUtil.padEnd(type1,padLength,Convert.toSBC(" ").charAt(0));
type2=StrUtil.padEnd(type2,padLength,Convert.toSBC(" ").charAt(0));
if("format1".equals(format)) {
System.out.printf("\t%s的:\t\"%s\" %n\t被转换为----->%n\t%s的 :\t\"%s\" %n%n",type1,value1, type2, value2);
}
if("format2".equals(format)) {
System.out.printf("\t基于 %s:\t\"%s\" %n\t获取 %s:\t\"%s\"%n%n",type1,value1, type2, value2);
}
if("format3".equals(format)) {
System.out.printf("\t%s:\t\"%s\" %n\t%n",type1,value1);
}
}
private String getTestMethodName(StackTraceElement[] stackTrace) {
for (StackTraceElement se : stackTrace) {
String methodName = se.getMethodName();
if(methodName.startsWith("test"))
return methodName;
}
return null;
}
@Target({METHOD,TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface Comment {
String value();
}
}
本文介绍了如何使用Hutool的EscapeUtil工具类进行Java的HTML转义和反转义操作。通过示例代码展示了escapeHtml4()和unescapeHtml4()方法的使用,帮助理解转义和反转义的过程。
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