[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; p}[zt#v
} =_YG#yS
int i1=l; 0ZQ'_g|%
int i2=mid+1; ccd8O{G.M
for(int cur=l;cur<=r;cur++){ 1:Si,d,wh
if(i1==mid+1) _G1gtu]
data[cur]=temp[i2++]; bI|2@HV2
else if(i2>r) vM_:&j_?``
data[cur]=temp[i1++]; 0a"igq9t
else if(temp[i1] data[cur]=temp[i1++]; !n^OM?.4
else ?WE
data[cur]=temp[i2++]; {mB0rKVm
} %X9r_Hx
} q&:=<+2"
.xBu-?6s6
} a1Qv@p^._b
xeGb?DPu
改进后的归并排序: \c^45<G2qA
y^o@"IYu3
package org.rut.util.algorithm.support; v9T_&
v@#b}N0n
import org.rut.util.algorithm.SortUtil; 3]?#he
%Qk/_ R1
/** LkQX?2>]
* @author treeroot O9:U8$*
* @since 2006-2-2 Ali9pvE
* @version 1.0 y!]CJigpZ
*/ imiR/V>N
public class ImprovedMergeSort implements SortUtil.Sort { 7 I>G{
epgPT'^
private static final int THRESHOLD = 10; sUPz/Z.h
@?"h !fyu
/* KN-avu_Ix
* (non-Javadoc) mS0udHod
* }`+B=h-dW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ``E/m<r:$
*/ }<'5 z qS
public void sort(int[] data) { F5o+kz$;
int[] temp=new int[data.length]; TwgrRtj'
mergeSort(data,temp,0,data.length-1); :_QCfH
} ^wS5>lf7p
"--t e
private void mergeSort(int[] data, int[] temp, int l, int r) { >3&O::]3
int i, j, k; d|4}obCt
int mid = (l + r) / 2; `O'`eY1f
if (l == r) 4V~?.
return; "?mJqA
if ((mid - l) >= THRESHOLD) 2U-3Q]/I}
mergeSort(data, temp, l, mid); 4 {9B9={
else @gG<le6
insertSort(data, l, mid - l + 1); ES40?o*]x
if ((r - mid) > THRESHOLD) w|Nz_3tI
mergeSort(data, temp, mid + 1, r); \(%Y%?dy
else '? jlH0;
insertSort(data, mid + 1, r - mid); jMpD+Mb
0>zbCubPH
for (i = l; i <= mid; i++) { VsA'de!V4[
temp = data; "le>_Ze_>|
} MeUaTJFEB
for (j = 1; j <= r - mid; j++) { h>Hb`G<
temp[r - j + 1] = data[j + mid]; 0:b2(^]bg
} *&f$K1p
int a = temp[l]; `Qqk<o
int b = temp[r]; i E CrI3s
for (i = l, j = r, k = l; k <= r; k++) { ~/*MY
if (a < b) { g(4xC7xK6
data[k] = temp[i++]; 1T[et-
a = temp; 85GKymz$P
} else { MQ"xOcD*F
data[k] = temp[j--]; +5XpzZ{#Wa
b = temp[j]; /B}lO0]:
} T*KMksjxm`
} }*L(;r)q
} ^+g$iM[`f
jRL<JZ1N
/** H#ncM~y*
* @param data i'\T R|qd
* @param l u7=U^}#
* @param i [}&Sxgv
*/ xNbPsoK
private void insertSort(int[] data, int start, int len) { 8(* [Fe9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +!|9hF'
} NQ6sGL
} k-}b{
} 8Ac:_Zg
} Q1+dCCY#F
v;)..X30
堆排序： @9"J|}
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package org.rut.util.algorithm.support; _8E/)M
]9@F~)
import org.rut.util.algorithm.SortUtil; z^<"x|:
=W'Ae,&
/** r-<F5<H+K@
* @author treeroot & \f{E\A#
* @since 2006-2-2 $*?,#ta
* @version 1.0 )6aAB|
*/ r9dyA5oD
public class HeapSort implements SortUtil.Sort{ ow]053:i
MNV% =G
/* (non-Javadoc) s)pbS}L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sm5H_m!
*/ ' MxrQ;|S
public void sort(int[] data) { ,S!azN=
MaxHeap h=new MaxHeap(); ^U!0-y
h.init(data); 4F{70"a
for(int i=0;i h.remove(); GP#aya
System.arraycopy(h.queue,1,data,0,data.length); 8e(\%bX
} L+q/){Dd(
9th,VnD0
private static class MaxHeap{ r >nG@A
gN"7be&J
void init(int[] data){ .p(T^ m2A*
this.queue=new int[data.length+1]; 9B9(8PVG
for(int i=0;i queue[++size]=data; 5^x1cUB]
fixUp(size); Z+=@<i''
} 5@BBoeG
} ruy}/7uf
\*<d{gZ~
private int size=0; &oX>*6L
^cuc.g)c$?
private int[] queue; d}4Y(
N}t 2Nu-
public int get() { \7'+h5a
return queue[1]; 0ik7v<:
} 9_5ow
|/)${*a4n
public void remove() { :n-]>Q>5=k
SortUtil.swap(queue,1,size--); s']Bx=
fixDown(1); $A-J,_:T<
} IqoR7ajA
file://fixdown 5wDg'X]>V
private void fixDown(int k) { XD2v*l|Po
int j; Kuu *&u
while ((j = k << 1) <= size) { AQwdw>I-FX
if (j < size %26amp;%26amp; queue[j] j++; &*aIEa^
if (queue[k]>queue[j]) file://不用交换 6g)GY"49
break; ,JQp'e
SortUtil.swap(queue,j,k); *vwbgJG! *
k = j; 73\JwOn~
} &eX!#nQ_.
} |Ur"& Z{
private void fixUp(int k) { {fjdr
while (k > 1) { io8'g3<
int j = k >> 1; ]&Rx@&e*
if (queue[j]>queue[k]) u@cYw:-C
break; #*UN >X
SortUtil.swap(queue,j,k); fNW"+ <W
k = j; (O(}p~s
} jr:7?8cH0L
} _y} T/I9
bl&nhI)w
} ][p>Y>:b-
~XmLX)vO/
} GVYkJ0,
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SortUtil： M]2]\km
!*B'?|a<\
package org.rut.util.algorithm; M# %a(Y3K)
NdD`Hn-
import org.rut.util.algorithm.support.BubbleSort; .E8_Oz
import org.rut.util.algorithm.support.HeapSort; kZGRxp9
import org.rut.util.algorithm.support.ImprovedMergeSort; Tq[kl'_
import org.rut.util.algorithm.support.ImprovedQuickSort; 0i\M,TNf*
import org.rut.util.algorithm.support.InsertSort; 4p,EBn9(
import org.rut.util.algorithm.support.MergeSort; '|8} z4/g
import org.rut.util.algorithm.support.QuickSort; GE%Z9#E
import org.rut.util.algorithm.support.SelectionSort; P 'od`
import org.rut.util.algorithm.support.ShellSort; T~##,qQ
;"~ fZ2$U
/** x#xFh0CA
* @author treeroot :Ra,Eu
* @since 2006-2-2 Xx0hc 8qd
* @version 1.0 naR0@Q"\h
*/ +{f:cea (1
public class SortUtil { @a0DT=>dT
public final static int INSERT = 1; Ni-xx9)=
public final static int BUBBLE = 2; 9\BT0kx
public final static int SELECTION = 3; ?FpWvyz|
public final static int SHELL = 4; 67G?K;)e
public final static int QUICK = 5; Zy?Hi`
public final static int IMPROVED_QUICK = 6; sg3OL/"
public final static int MERGE = 7; T^k7o^N>
public final static int IMPROVED_MERGE = 8; 9Hb6nm
public final static int HEAP = 9; tne ST.
L"1}V
public static void sort(int[] data) { pUQ/03dp
sort(data, IMPROVED_QUICK); p;3O#n-_
} %,@e^3B
private static String[] name={ zkuU5O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #Oc] @
}; j2StXq3
keX,d#
private static Sort[] impl=new Sort[]{ AicBSqUke
new InsertSort(), _M`--.{\O[
new BubbleSort(), QLvHQtzwX
new SelectionSort(), g+Sbl
new ShellSort(), <oT^A|JFj
new QuickSort(), %^4CSh
new ImprovedQuickSort(), ;RC{<wBTx
new MergeSort(), \F/hMXDlJ
new ImprovedMergeSort(), x7!L{(E3
new HeapSort() %\dz m-d(C
}; ,*&:2o_r
c4^ks&)'
public static String toString(int algorithm){ >_-s8t=|
return name[algorithm-1]; zuJ@E=7
} ^6MU 0Q2
p'*>vk
public static void sort(int[] data, int algorithm) { G\Cp7:j}
impl[algorithm-1].sort(data); vgH3<pDiU6
} t\~P:"
|y!=J$$_H
public static interface Sort { /v1Q4mq
public void sort(int[] data); CYs,`
} aW)-?(6>
mD$A4Y-'p
public static void swap(int[] data, int i, int j) { >~[c|ffyo/
int temp = data; 0ghGBuv1s
data = data[j]; }Qn&^[[miL
data[j] = temp; Dwr)0nk
} F;4vPbH+
} .f%fHj