[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; wvby?MhPY
} z rfUQO
int i1=l; 6'-As=iw
int i2=mid+1; +.yT/y"
for(int cur=l;cur<=r;cur++){ jZ*WN|FK?
if(i1==mid+1) s!B/WsK
data[cur]=temp[i2++]; ~O6\6$3b5E
else if(i2>r) nH-V{=**
data[cur]=temp[i1++]; j\&pej
else if(temp[i1] data[cur]=temp[i1++]; # Su~`]
else Zjh2{ :
data[cur]=temp[i2++]; cr;`Tl~}s
} +^|iZbZKx
} jp2Q9Z
r'7LR
} s^8u&y)3
[g|Y7.j8
改进后的归并排序: {KL5GowH
, X{>
package org.rut.util.algorithm.support; Zu*K-ep"
sW@krBxMv
import org.rut.util.algorithm.SortUtil; 6<76H
~NcQ1.
/** @.C{OSHE
* @author treeroot r' Z3
* @since 2006-2-2 /RnTQ4
* @version 1.0 #FxPj-3(ix
*/ }hpmO-
public class ImprovedMergeSort implements SortUtil.Sort { yV_wDeAz
A!i q->+
private static final int THRESHOLD = 10; kFLB> j97
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/* Fr2N[\>s
* (non-Javadoc) K4ZolWbU
* |I;$M;'r&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J @IS\9O
*/ qQ]]~F
public void sort(int[] data) { ]; $] G-
int[] temp=new int[data.length]; 5*g]qJF
mergeSort(data,temp,0,data.length-1); k?GD/$1t
} iA }vKQ
?/hZb"6W
private void mergeSort(int[] data, int[] temp, int l, int r) { Y"g.IK`V
int i, j, k; $.%rAa_H
int mid = (l + r) / 2; Fg]?zEa
if (l == r) sBX-X$*N
return; I0'WOV70
if ((mid - l) >= THRESHOLD) ]b?9zeT*'l
mergeSort(data, temp, l, mid); @C_KV0i
else )FN;+"IJ
insertSort(data, l, mid - l + 1); KJn!Ap
if ((r - mid) > THRESHOLD) e.d #wyeX
mergeSort(data, temp, mid + 1, r); bpAv1udX-W
else nAJdr*`a,5
insertSort(data, mid + 1, r - mid); (.Y/
rh*sbZ68>E
for (i = l; i <= mid; i++) { 1Tp/MV/>
temp = data; $g9**b@
} k;W@LfP
for (j = 1; j <= r - mid; j++) { OHrY(I6
temp[r - j + 1] = data[j + mid]; ZD/jX_!t
} +0wT!DZW\=
int a = temp[l]; l\0w;:N3
int b = temp[r]; n"Veem[_4g
for (i = l, j = r, k = l; k <= r; k++) { `mfq 2bVc
if (a < b) { /UcV
data[k] = temp[i++]; iSLGwTdLn
a = temp; zw<p74DH
} else { . 5y"38e
data[k] = temp[j--]; ZzGahtx)Y
b = temp[j]; ym,H@~
} iRo.RU8>
} 9# 4Y1LS)
} #FOqP!p.E
Cs3^9m6;d
/** 'wasZ b<^
* @param data UB`ToE|Ii
* @param l m><w0k?t
* @param i N7r_77%m0
*/ `$LWmm#
private void insertSort(int[] data, int start, int len) { 6DIZ@oi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g6t"mkMY L
} -/C)l)V}
} O43YY2
} $q?$]k|M`
} Ox!U8g8c
lH^^77"4Qo
堆排序： %.v{N6
DhLqhME53
package org.rut.util.algorithm.support; sAn0bX
N{SQ(%V
import org.rut.util.algorithm.SortUtil; ^$>XW\yCs
~[o4a'
/** Qp,DL@mp>8
* @author treeroot s.Y4pWd5@
* @since 2006-2-2 cLa]D[H
* @version 1.0 pL=d% m.W
*/ mMx;yZ
public class HeapSort implements SortUtil.Sort{ !rDdd%Z
w.\w1:d
/* (non-Javadoc) [S]S^ej*8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tY${M^^<J
*/ vr^~yEr
public void sort(int[] data) { qLL,F
MaxHeap h=new MaxHeap(); ?<&O0'Q
h.init(data); u=F+(NE"
for(int i=0;i h.remove(); 3ya1'qUC
System.arraycopy(h.queue,1,data,0,data.length); `O?TUQGR
} k#Of]mXXz
s`j~-P
private static class MaxHeap{ ,21 np
yH 9!GS#
void init(int[] data){ |s#'dS;
this.queue=new int[data.length+1]; `i) 2nNJ"
for(int i=0;i queue[++size]=data; `(+o=HsD
fixUp(size); mffn//QS
} NgCuFL(Ic
} u?Tpi[ #
5AS[\CB4
private int size=0; \I-#1M
TC~Q G$NW
private int[] queue; ne61}F"E
87)zCq
public int get() { /){KOCBl;
return queue[1]; ,oxcq?7#4
} "vCM}F
s5.AW8X=?*
public void remove() { 5ercD
SortUtil.swap(queue,1,size--); !MDNE*_
fixDown(1); )D'^3)FF
} +MbIB&fRCB
file://fixdown 'bGX-C
private void fixDown(int k) { > oA?6x
int j; l+V,DCE
while ((j = k << 1) <= size) { QVF]Ci_=
if (j < size %26amp;%26amp; queue[j] j++; "Td`AuP@,
if (queue[k]>queue[j]) file://不用交换 4nH*Ui!T
break; `-`qdda
SortUtil.swap(queue,j,k); R+q"_90_
k = j; V}d9f2
} IKtB;
} &mj6rIz
private void fixUp(int k) { hUQ,z7-
while (k > 1) { CycUeT
int j = k >> 1; I1X/Lj=
if (queue[j]>queue[k]) M<SdPC(+
break; &1l=X]%
SortUtil.swap(queue,j,k); Iz6y{E
k = j; WwF~d+>|C
} )15Z#`x
} F-D]TRG/*]
,:~0F^z
} 6)oLus
;Sd\VR
} lZ8CY
#po5_dE\*
SortUtil： lf>*Y.!@me
}pk#!N
package org.rut.util.algorithm; yc2/~a_Gx
RsU3Gi_Zdz
import org.rut.util.algorithm.support.BubbleSort; kt[:@Nda9
import org.rut.util.algorithm.support.HeapSort; wxm:7$4C
import org.rut.util.algorithm.support.ImprovedMergeSort; D'Z|}(d&
import org.rut.util.algorithm.support.ImprovedQuickSort; lnovykR
import org.rut.util.algorithm.support.InsertSort; ;U1UFqZ`
import org.rut.util.algorithm.support.MergeSort; kyAXRwzI
import org.rut.util.algorithm.support.QuickSort; Am8x74?
import org.rut.util.algorithm.support.SelectionSort; [s9O0i" Y
import org.rut.util.algorithm.support.ShellSort; @prG%vb"
9_\'LJ
/** 6.5T/D*TT
* @author treeroot {X2`&<i6
* @since 2006-2-2 BR'I+lQ
* @version 1.0 0JgL2ayIVI
*/ ^mAYBOE
public class SortUtil { ]0;864X0
public final static int INSERT = 1; M :3u@06a
public final static int BUBBLE = 2; ] 2DH;
public final static int SELECTION = 3; t1VH doNN
public final static int SHELL = 4; 2^t#6XBk/
public final static int QUICK = 5; +(xeT+J
public final static int IMPROVED_QUICK = 6; vA$o~?a]/
public final static int MERGE = 7; 7'wS\/e4a
public final static int IMPROVED_MERGE = 8; rC:?l(8ng3
public final static int HEAP = 9; L,d LE-L
TI9UXa:V\
public static void sort(int[] data) { w ;daC(:
sort(data, IMPROVED_QUICK); hYQ_45Z*?
} c4_`Ew^k
private static String[] name={ TF2>4 p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kc7lc|'z
}; mzQ`N}]T:
@ S<-d
private static Sort[] impl=new Sort[]{ 8 #ndFpu
new InsertSort(), LPG`^SA
new BubbleSort(), V{|}}b?w?
new SelectionSort(), mh<=[J,%p
new ShellSort(), eI1GXQ%
new QuickSort(), aNyvNEV3C
new ImprovedQuickSort(), ^xf<nNF:p
new MergeSort(), axHK_1N{
new ImprovedMergeSort(), h._nK\
new HeapSort() k{gLMl
}; C^QtSha
9}B`uJ
public static String toString(int algorithm){ /(O$(35
return name[algorithm-1]; K1V#cB WO
} {;2vmx9
]"c+sMW
public static void sort(int[] data, int algorithm) { h^ -.]Y
impl[algorithm-1].sort(data); 2+Px'U\
} !6Sd(2
!*2%"H*
public static interface Sort { dd?x(,"A`
public void sort(int[] data); ;q0uE:^S
} {lth+{&L#
`mye}L2I
public static void swap(int[] data, int i, int j) { CG'.:`t
int temp = data; xEuN
data = data[j]; T#pk]c6Q
data[j] = temp; `%3/
} DK0.R]&4(
} 7bxA]s{m