[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; "CZ`hx1|^
} `qfVgT=2
int i1=l; pwu5Fxn)
int i2=mid+1; g5T~%t5lo
for(int cur=l;cur<=r;cur++){ u6%56 %^f
if(i1==mid+1) 67n1s
data[cur]=temp[i2++]; c)$/Uu
else if(i2>r) C[x!Lf8'
data[cur]=temp[i1++]; ]-ZD;kOr
else if(temp[i1] data[cur]=temp[i1++]; y:W$~<E`p
else bk>M4l61
data[cur]=temp[i2++]; `NGCUGQ_7
} 4!monaB"e
} .#+rH}=Z
*XNvb ^<
} MJ7!f+!5
rc;| ,\
改进后的归并排序: @l@lE0
G=b`w;oL:
package org.rut.util.algorithm.support; AE<AEq
hl# 9a?
import org.rut.util.algorithm.SortUtil; d<Z`)hI{K
\kg2pF[V
/** J0s8vAs
* @author treeroot 4}NFa;M1
* @since 2006-2-2 O^e !<bBd
* @version 1.0 Q2tGe~H
*/ 9OTw6
public class ImprovedMergeSort implements SortUtil.Sort { ^ 0TJys%
]cA){^.Jz
private static final int THRESHOLD = 10; 6aj)Fe'2
#G]s.by('
/* O:u^jcXA
* (non-Javadoc) <89js87
* \x|(`;{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yyiZV\ /
*/ [F6=JZ
public void sort(int[] data) { 3z5,4ps
int[] temp=new int[data.length]; /,B"H@J
mergeSort(data,temp,0,data.length-1); 0dnm/'L
} no;Yu
`T~M:\^D
private void mergeSort(int[] data, int[] temp, int l, int r) { 6}<PBl%qe
int i, j, k; - +>~
int mid = (l + r) / 2; 9g 2x+@5T^
if (l == r) Z9!goI
return; -`Z5#8P
if ((mid - l) >= THRESHOLD) xXHz)w
mergeSort(data, temp, l, mid); {N _v4})
else }uZhoA
insertSort(data, l, mid - l + 1); hL8QA!
if ((r - mid) > THRESHOLD) MiRMjQ2
mergeSort(data, temp, mid + 1, r); ^ ]`<nO
else qdcCX:Z<
insertSort(data, mid + 1, r - mid); d/* [t!
w0 "h,{
for (i = l; i <= mid; i++) { (j cLzq
temp = data; `@`Q"J
} |7f}icXKur
for (j = 1; j <= r - mid; j++) { "e(OO/EZS
temp[r - j + 1] = data[j + mid]; ss-Be
} e"2 wXd_}
int a = temp[l]; Gq0~&6
int b = temp[r]; ,Q}/#/
for (i = l, j = r, k = l; k <= r; k++) { 7OW;omT`
if (a < b) { OP<@Xz
data[k] = temp[i++]; wRLkO/Fw
a = temp; Kj'm<]u
} else { Rfgc^3:j
data[k] = temp[j--]; VJ1si0vWtq
b = temp[j]; ){gOb
} (hmasy6hM
} &5zUk++
} )"f>cYF
Q&n|tQ*4
/** iv56zsR
* @param data ,Cx5( ~kU
* @param l -/FCd(
* @param i . vYGJ8(P
*/ 8n2*z
private void insertSort(int[] data, int start, int len) { ;9;.!4g/T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [KCh,'&
} (:@qn+ a
} 2{{M{#}S.
} C~6aX/:
} [*50Ng>P`
b7"pm)6
堆排序： SHhg&~B
A #ZaXu/:X
package org.rut.util.algorithm.support; "\> <UJ
)Hw;{5p@
import org.rut.util.algorithm.SortUtil; hBN!!a|l
Iye
/** `~*qjA
* @author treeroot ?VReKv1\
* @since 2006-2-2 f^0vkWI2
* @version 1.0 8zZR%fZ
*/ lOZ.{0{f,
public class HeapSort implements SortUtil.Sort{ A0&~U0*(~
V+(
/* (non-Javadoc) &_!BMzp4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >~XX'}
*/ '+-R 7#
public void sort(int[] data) { yqCy`TK8
MaxHeap h=new MaxHeap(); y.mojx%?a
h.init(data); W+1V&a}E
for(int i=0;i h.remove(); S0"OU0`N
System.arraycopy(h.queue,1,data,0,data.length); ts)0+x
} e6{/e+/R
"I_3!Yu
private static class MaxHeap{ '!En,*'IS
"jAV7lP
void init(int[] data){ 7E|0'PPR
this.queue=new int[data.length+1]; (&X"~:nm2
for(int i=0;i queue[++size]=data; GK\'m@k
fixUp(size); } #%sI"9
} pY-izML
} |nocz]yU$
YS~\Gls%
private int size=0; .R:eN&Y8y
l`,`N+FG
private int[] queue; r+ vtKb
if_e$,dh~>
public int get() { >,1'[)_
return queue[1]; )[zyvU. J3
} )w/f 'fq
-?@$`{-K
public void remove() { 3)GXu>) t
SortUtil.swap(queue,1,size--); u}#rS%SF*
fixDown(1); p>R F4
} mflI>J=g
file://fixdown `DJIY_{-2
private void fixDown(int k) { Gt- -7S
int j; J"[OH,/_
while ((j = k << 1) <= size) { I]
if (j < size %26amp;%26amp; queue[j] j++; :G}tvFcOAF
if (queue[k]>queue[j]) file://不用交换 @#o$~'my
break; +R*4`F:QJQ
SortUtil.swap(queue,j,k); j*+r`CX
k = j; r$0=b -
} TTqOAo[-Z
} c~c3;
private void fixUp(int k) { WgY\m&
while (k > 1) { -3KB:K<
int j = k >> 1; rhL<JTS
if (queue[j]>queue[k]) mM}|x~\R
break; h8S%Q|-
SortUtil.swap(queue,j,k); 0<i~XN0g
k = j; o AQ92~b
} 0.+iVOz+Y
} /=Xen mmS
+mxsjcq0
} 6W#+U<
Ro%S_!
} +>I4@1qC-|
rJNf&x%6
SortUtil： GWP"i77y0s
kZn!]TseN
package org.rut.util.algorithm; (EohxLl!p
vTB*J,6.
import org.rut.util.algorithm.support.BubbleSort; q F}5mUcZ4
import org.rut.util.algorithm.support.HeapSort; rj{'X /
import org.rut.util.algorithm.support.ImprovedMergeSort; pX*mX]
import org.rut.util.algorithm.support.ImprovedQuickSort; d2(eX\56Z
import org.rut.util.algorithm.support.InsertSort; )bcMKZ
import org.rut.util.algorithm.support.MergeSort; |,yS>kjp
import org.rut.util.algorithm.support.QuickSort; IkkJ4G
import org.rut.util.algorithm.support.SelectionSort; blp)a
import org.rut.util.algorithm.support.ShellSort; 9jvg[H
/M'b137
/** m"v` E7G
* @author treeroot Ufo-AeQo
* @since 2006-2-2 %:oGyV7a
* @version 1.0 BkO"{
*/ j^64:3
public class SortUtil { t+?\4+!<
public final static int INSERT = 1; o-x_[I|@
public final static int BUBBLE = 2; %X.Q\T
public final static int SELECTION = 3; <F!:dyl
public final static int SHELL = 4; 1BWuFYB
public final static int QUICK = 5; +{#BQbx6
public final static int IMPROVED_QUICK = 6; Q'\jm=k
public final static int MERGE = 7; $G=\i>R.
public final static int IMPROVED_MERGE = 8; _abVX#5<
public final static int HEAP = 9; hSg:Rqnk
4wNxn lP
public static void sort(int[] data) { heh!cDK
sort(data, IMPROVED_QUICK); 7&sCEYEb
} E!Ng=}G&_
private static String[] name={ 33u7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QZwRg&d<o
}; }D=h"\_=
`Cb$8;)z
private static Sort[] impl=new Sort[]{ NZ.aI{
new InsertSort(), bFflA
new BubbleSort(), {8"W
new SelectionSort(), !p9BH6$`
new ShellSort(), s"Kp+tTWj
new QuickSort(), 7IIM8/BI
new ImprovedQuickSort(), :F<a~_k
new MergeSort(), =,?@p{g}
new ImprovedMergeSort(), )}6:Ke)
new HeapSort() Pb~S{):
}; ?2G^6>O`
L\"=H4r
public static String toString(int algorithm){ tL IE^
return name[algorithm-1]; HX <;=m
} IGI2).$[
mybDK'EW
public static void sort(int[] data, int algorithm) { 9ge$)q@3
impl[algorithm-1].sort(data); zR5D)`Ph
} $/d~bk@=l
w]%r]PwU+
public static interface Sort { fc\hQXYv
public void sort(int[] data); g.9MPN
} wTTQIo60
J7E/2Sl
public static void swap(int[] data, int i, int j) { s%/0WW0y^
int temp = data; p]aIMF_
data = data[j]; {@3=vBl%O+
data[j] = temp; _c #P
} &E9%8Q)r(
} l_kH^ET