[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; lO> 7`2x=F
} 5,BkwAr+6[
int i1=l; #.+*G`m
int i2=mid+1; #0^3Wm`X;
for(int cur=l;cur<=r;cur++){ L"7` \4
if(i1==mid+1) sFCs_u1tNN
data[cur]=temp[i2++]; -#;VFSz,9*
else if(i2>r) *9Js:z7I
data[cur]=temp[i1++]; BC{J3<0bf@
else if(temp[i1] data[cur]=temp[i1++]; "Vp:z V<S
else YCBML!L
data[cur]=temp[i2++]; u6I0<i_KZ
} X1[R*a/p
} e=;@L3f
G!LNP&~
} x ETVtq
I+?$4SC
改进后的归并排序: n;^k
-sH.yAvC6
package org.rut.util.algorithm.support; mRnzP[7-\)
bA^:p3
import org.rut.util.algorithm.SortUtil; TgE.=`"7
zHc4e
/** wQrPS
* @author treeroot Y1_6\zpA
* @since 2006-2-2 bc=u1=~w
* @version 1.0 C\2>7
*/ UH,4b`b
public class ImprovedMergeSort implements SortUtil.Sort { *o\Y~U-so
MN M>
private static final int THRESHOLD = 10; JS7}K)A2B6
lyH X#]
/* fRa-bqQ
* (non-Javadoc) grfdvN
* q{Ta?|x#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;/^]|
*/ t"bPKFRy9E
public void sort(int[] data) { !_z<W~t"
int[] temp=new int[data.length]; (VXx G/E3
mergeSort(data,temp,0,data.length-1); {L-aXe{
} s?;<F
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private void mergeSort(int[] data, int[] temp, int l, int r) { 07LL)v~
int i, j, k; iI@Gyq=
int mid = (l + r) / 2; vz#wP
if (l == r) 0O['-x
return; Yx}"> ;\
if ((mid - l) >= THRESHOLD) gQpD]p%k
mergeSort(data, temp, l, mid); SL\y\GaV
else EO9kE.g
insertSort(data, l, mid - l + 1); X?v^>mA
if ((r - mid) > THRESHOLD) p`<e~[]a
mergeSort(data, temp, mid + 1, r); WP@JrnxO\`
else j zmSFKg*
insertSort(data, mid + 1, r - mid); &b@!DAwAJ
pW3)Y5/D
for (i = l; i <= mid; i++) { \l=KWa3Q
temp = data; Puth8$
} jQ_|z@OV
for (j = 1; j <= r - mid; j++) { %X9:R'~sP
temp[r - j + 1] = data[j + mid]; ahi57r[
} RqN_vk\
int a = temp[l]; X.T\=dm%v
int b = temp[r]; &t*8oNwSs
for (i = l, j = r, k = l; k <= r; k++) { TA@tRGP>
if (a < b) { 8F`BJ6='
data[k] = temp[i++]; O2'bNR
a = temp; L%o65
} else { ]2xx+P#Y
data[k] = temp[j--]; LE0J ;|1
b = temp[j]; 1hMX(N&|
} mSw?2ba
} SP D207
} _8NEwwhc
Oj4u!SY\j
/** ?LV-W
* @param data :uIi ?
* @param l b5n]Gp
* @param i I4o=6ts
*/ I", &%0ycm
private void insertSort(int[] data, int start, int len) { M8#*zCp{5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Hlt8al3
} rt3f7 s*
} \&\_>X.,
} Ha=_u+@
} D8@nkSP
l?o-!M{
堆排序： #LN5&i;s
x!"SD3r=4>
package org.rut.util.algorithm.support; O:5Rp_?^
AK@`'$
import org.rut.util.algorithm.SortUtil; JGk3b=K
"W &:j:o
/** m?D <{BQ;
* @author treeroot #hD}S~
* @since 2006-2-2 M1/M}~
* @version 1.0 n) _dH/"
*/ d}{LM!s
public class HeapSort implements SortUtil.Sort{ E-yT
"EcX_>
/* (non-Javadoc) e-CNQnO~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Snc;p
*/ }J ei$0x
public void sort(int[] data) { W>5vRwx00
MaxHeap h=new MaxHeap(); P"(z jG9-
h.init(data); "3{#d9Gs
for(int i=0;i h.remove(); H&w:`JYDL3
System.arraycopy(h.queue,1,data,0,data.length); h4hN1<ky\
} uipq=Yp.
_ztZ>'
private static class MaxHeap{ ./'~];&
di6B!YQP
void init(int[] data){ G(U9rJ9
this.queue=new int[data.length+1]; EMVk:Vt]
for(int i=0;i queue[++size]=data; ?QCmSK=L
fixUp(size); \~JNQ&_o
} o&(wg(Rv
} T>}0) s
[8>z#*B
private int size=0; y[: ~CL
~I{EE[F>qL
private int[] queue; c |>=S)|
:P3{Nxa
public int get() { /b{o3, #.M
return queue[1]; ]dvPx^`d{
} >_XOc
!Y (apVQ
public void remove() { KAd_zkUA
SortUtil.swap(queue,1,size--); >^a$
fixDown(1); t)YUPDQ@J
} )uZoH8?
file://fixdown bS>R5*Zp
private void fixDown(int k) { Z&_y0W=t
int j; H&M1>JtE
while ((j = k << 1) <= size) { 9YB2e84j
if (j < size %26amp;%26amp; queue[j] j++; l , ..5
if (queue[k]>queue[j]) file://不用交换 .%q$d d>>
break; '"y}#h__T
SortUtil.swap(queue,j,k); 5sCFzo<=vh
k = j; XAe\s`
} m6^ 5S
} 2d*_Qq1
private void fixUp(int k) { "e 1wr
while (k > 1) { LheFQ A
int j = k >> 1; B`fH^N
if (queue[j]>queue[k]) !xu9+{-
break; GcT;e5D
SortUtil.swap(queue,j,k); ;j{7!GeKa
k = j; B MM--y@
} C5|db{=\.*
} yub{8f;v
s=Df `
} )0^>#k
d+;gw*_Ei
} =!BobC- [b
\q "N/$5{f
SortUtil： ~:4~2d|
UUeB;'E+
package org.rut.util.algorithm; !^e =P%S
U&UKUACn"
import org.rut.util.algorithm.support.BubbleSort; !SO8O
import org.rut.util.algorithm.support.HeapSort; U3E&n1AA
import org.rut.util.algorithm.support.ImprovedMergeSort; dH\XO-Z7v
import org.rut.util.algorithm.support.ImprovedQuickSort; 7{e=="#*
import org.rut.util.algorithm.support.InsertSort; lT'9u,6
import org.rut.util.algorithm.support.MergeSort; 5+- I5HX|~
import org.rut.util.algorithm.support.QuickSort; \ECu5L4
import org.rut.util.algorithm.support.SelectionSort; KVkMU?6
import org.rut.util.algorithm.support.ShellSort; ecj7BT[mLI
pu+ur=5&
/** H6K`\8/SeN
* @author treeroot c0_E_~
* @since 2006-2-2 O/Rhf[7v*
* @version 1.0 vi!YN|}\
*/ @%hCAm
public class SortUtil { AQss4[\Dx
public final static int INSERT = 1; C3XmK}h
public final static int BUBBLE = 2; +/rH(Ni
public final static int SELECTION = 3; >Kivuc
public final static int SHELL = 4; k`\R+WK$
public final static int QUICK = 5; \( )#e
public final static int IMPROVED_QUICK = 6; 4-R^/A0
public final static int MERGE = 7; HN6}R|IH
public final static int IMPROVED_MERGE = 8; g5Z#xszj+
public final static int HEAP = 9; +9XQ[57
t*G/]
public static void sort(int[] data) { WC,+Cn e
sort(data, IMPROVED_QUICK); 2HD]?:Fk7
} 17|np2~
private static String[] name={ 9Q;c,]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l"(6]Z 4
}; LD>\#q8a*
h3* x[W
private static Sort[] impl=new Sort[]{ C&~1M}I
new InsertSort(), e>}}:Ud
new BubbleSort(), a4MZ;5
new SelectionSort(), ORN6vX(1
new ShellSort(), 1f'Hif*r_X
new QuickSort(), Wg`AZ=t
new ImprovedQuickSort(), I$t3qd{H&
new MergeSort(), _>m-AI4^
new ImprovedMergeSort(), 44ed79ly0)
new HeapSort() q.#[TI ^
}; px;/8c-
en F:>H4
public static String toString(int algorithm){ (1R?s>3o
return name[algorithm-1]; L!Cz'm"Nl
} !v.9"!' N
#R0A= !
public static void sort(int[] data, int algorithm) { ?, r~=
impl[algorithm-1].sort(data); X-LA}YH=tS
} 8.J(r(;>
;%C'FV e]
public static interface Sort { v``-F(i$
public void sort(int[] data); )E#2J$TD
} =sJ _yq0#R
[,RI-#n
public static void swap(int[] data, int i, int j) { 3REx45M2
int temp = data; j@gMbiu
data = data[j]; #]?bLm<!
data[j] = temp; b2,mCfLsv
} iIT8H\e
} ^ KK_qC