[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; (mtk 4
} 3HY9\'t6
int i1=l; O55 xS+3^k
int i2=mid+1; !5uGd`^I
for(int cur=l;cur<=r;cur++){ i9][N5\$
if(i1==mid+1) t"/q]G5
data[cur]=temp[i2++]; l$bu%SZ
else if(i2>r) G,Azm}+
data[cur]=temp[i1++]; K?$^@N
else if(temp[i1] data[cur]=temp[i1++]; >>fH{/l
else .gOL1`b*
data[cur]=temp[i2++]; hv_XP,1K
} OMg<V
} >_ 2dvg=U
/HRFAqep
} n$,*|_$#
zi*R`;_`,
改进后的归并排序: naznayy
2'MZ s]??w
package org.rut.util.algorithm.support; Ffta](Z;
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import org.rut.util.algorithm.SortUtil; 9ahWIO%
j+v=Ul|l
/** [!]2djc
* @author treeroot Bad:no\W
* @since 2006-2-2 O~K>4ax
* @version 1.0 tc{sB\&-
*/ !6Mo]xh
public class ImprovedMergeSort implements SortUtil.Sort { O2dW6bt
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private static final int THRESHOLD = 10; JKGe"
UVIKQpA]A
/* uT7B#b7
* (non-Javadoc) 1 \6D '/G
* KE3;V2Ym f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G..aiA
*/ 0o*8#i/)!3
public void sort(int[] data) { r/6o \-
int[] temp=new int[data.length]; _#8RSr8'y
mergeSort(data,temp,0,data.length-1); Ur=(.%@
} eu|;eP-+d
e@* EzvO
private void mergeSort(int[] data, int[] temp, int l, int r) { ?\s+EE&-
int i, j, k; /9pwZ%:<
int mid = (l + r) / 2; o@i#|kx,
if (l == r) 6 EC*
return; yx&51G$
if ((mid - l) >= THRESHOLD) ;8{4!S&b
mergeSort(data, temp, l, mid); C-6F]2:
else 1rF]yi:X
insertSort(data, l, mid - l + 1); !*bMa8]*
if ((r - mid) > THRESHOLD) q}#6e]t
mergeSort(data, temp, mid + 1, r); "v({,
else $#pPZ
insertSort(data, mid + 1, r - mid); KRMQtgahc
OCaq3_#tZ
for (i = l; i <= mid; i++) { TOXfWEU3>
temp = data; e)#J1(j_
} h2J/c#Qvh
for (j = 1; j <= r - mid; j++) { 8~z~_TD6m@
temp[r - j + 1] = data[j + mid]; 6){]1h"
} e-#BDN(O
int a = temp[l]; nWYN Np?h
int b = temp[r]; E`de7
for (i = l, j = r, k = l; k <= r; k++) { n'kG] Q
if (a < b) { =Bhe'.]QSx
data[k] = temp[i++]; aa#Y=%^
a = temp; =sJ7=39
} else { EZ$>.iy{
data[k] = temp[j--]; "~7>\>UFh
b = temp[j]; #S*/bao#
} |\IN.W[EL
} K<Iv:5-2
} 4\u1TYR
"x*egI
/** PV\+P6aIb
* @param data ]<rkxgMW>
* @param l oO|KEY(
* @param i 0C irfcs}Z
*/ 6vNrBB
private void insertSort(int[] data, int start, int len) { %Iv,@}kvT+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KZ ;k)O.Ov
} ,J^b0@S
} "haL
} dj7hx"BI
} yvHA7eq*"
,\
堆排序： h!.^?NF
p#?7w
package org.rut.util.algorithm.support; ?Unb? {,&2
:f}9($
import org.rut.util.algorithm.SortUtil; ,<tX%n`v=
n;+LH9
/** >dG;w6y'
* @author treeroot =Og)q$AL
* @since 2006-2-2 B43HNs
* @version 1.0 _%!c+f7
*/ *@v)d[z_
public class HeapSort implements SortUtil.Sort{ #_J@-f7^
IsM}'.
/* (non-Javadoc) XJ` ]ga
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z/0fXn})
*/ (SDr!!V<
public void sort(int[] data) { uU <=d
MaxHeap h=new MaxHeap(); _c*=4y
h.init(data); s{S4J'VW
for(int i=0;i h.remove(); M&@b><B
System.arraycopy(h.queue,1,data,0,data.length); &d+Kg0:
} 0y;*Cfi9
n}_JB>i~
private static class MaxHeap{ ?Exv|e
B~JwHwIhA
void init(int[] data){ ~&8^9E a
this.queue=new int[data.length+1]; 4c$ zKqz
for(int i=0;i queue[++size]=data; f]|ysf
fixUp(size); YoZFwRQU
} r(aLEJ"u?
} A3no~)wZn
M/ni6%x
private int size=0; Jz.NHiLct1
v~V5`%
private int[] queue; Vq5k+3W+
CBOi`bEf
public int get() { L,`Lggq-
return queue[1]; ;8*`{F[
} G_{&sa
6@e+C;j=
public void remove() { 8U>B~9:JO
SortUtil.swap(queue,1,size--); L[H5NUG!
fixDown(1); EB=-H#
} jN>{'TqW4
file://fixdown D@|W<i-
private void fixDown(int k) { jR22t`4
int j; ^ZhG>L*
while ((j = k << 1) <= size) { V|/NB
if (j < size %26amp;%26amp; queue[j] j++; ') gi%
if (queue[k]>queue[j]) file://不用交换 o/6-3QUak
break; V\6[}J
SortUtil.swap(queue,j,k); /<}m? k\
k = j; >.'*)@vQi
} Nz+949X
} rI>aAW'
private void fixUp(int k) { h\.zdpR
while (k > 1) { O-cbX/d
int j = k >> 1; AW_(T\P:u
if (queue[j]>queue[k]) v<OJ69J
break; Q`D~5ci
SortUtil.swap(queue,j,k); YW`,v6
k = j; (TwnkXrR,
} "@d[h,TM
} wsN?[=l{s
}YMy6eW4
} t!x5fNo)
y[\VUzD*'
} m&\h4$[kql
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SortUtil： }i`PGx
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package org.rut.util.algorithm; gu<'QV"
("+}=*?OF3
import org.rut.util.algorithm.support.BubbleSort; aj}sc/Qa
import org.rut.util.algorithm.support.HeapSort; VUYmz)m5
import org.rut.util.algorithm.support.ImprovedMergeSort; Q7$.LEioN
import org.rut.util.algorithm.support.ImprovedQuickSort; @,u/w4
import org.rut.util.algorithm.support.InsertSort; kRD%b[*d
import org.rut.util.algorithm.support.MergeSort; Zh*u(rO
import org.rut.util.algorithm.support.QuickSort; Z@&Dki
import org.rut.util.algorithm.support.SelectionSort; Ucm :S-
import org.rut.util.algorithm.support.ShellSort; Nwt" \3
H5]^ 6 HwX
/** 2eC(Ijq[a
* @author treeroot !V\Q<So<
* @since 2006-2-2 \XM^oE#G
* @version 1.0 ZAUQJS 91E
*/ 92d6U2T4&
public class SortUtil { 4Hn`'+b
public final static int INSERT = 1; ./D$dbu3
public final static int BUBBLE = 2; w@c87;c
public final static int SELECTION = 3; |- rI@2`
public final static int SHELL = 4; ,^WJm?R
public final static int QUICK = 5; >O?U=OeD
public final static int IMPROVED_QUICK = 6; ~J8pnTY
public final static int MERGE = 7; i|}[A
public final static int IMPROVED_MERGE = 8; psC mbN
public final static int HEAP = 9; !]fQ+*X0g
q7Dw_<
public static void sort(int[] data) { o{EC&-
sort(data, IMPROVED_QUICK); iMFgmM|
} E%v?t1>/
private static String[] name={ E}_[QEY;Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6,LubZFD
}; wm")[!h)v
(_*5oj-
private static Sort[] impl=new Sort[]{ X*Dj[TD]
new InsertSort(), W4U@%b do
new BubbleSort(), UybW26C;aU
new SelectionSort(), _uKZMl
new ShellSort(), dT$M y`>
new QuickSort(), qY$qaM^=
new ImprovedQuickSort(), *B\H-lp?
new MergeSort(), Vc%R$E%
new ImprovedMergeSort(), qc!MG_{Y
new HeapSort() v-Fg +
}; ofMY,~w
U uM$~qf/K
public static String toString(int algorithm){ ;)I'WQ]Q
return name[algorithm-1]; a9Z%JS]
} Ppt2A6W
80Y\|)
public static void sort(int[] data, int algorithm) { <~X>[PK<
impl[algorithm-1].sort(data); gEhN3(
} @]c(V%x
hj$e|arB
public static interface Sort { `^Eae
public void sort(int[] data); N2$I}q%
} c$`4*6
7,MS '2nz
public static void swap(int[] data, int i, int j) { 0lsXCr_X
int temp = data; ;k86"W
data = data[j]; z%7SrUj2
data[j] = temp; rVa?JvDO=
} |?,[@z _,
} 7`H 1f]d