[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; GuQ3$B3j
} 7XT2d=)"
int i1=l; 8UwL%"?YB
int i2=mid+1; `O.*qs5
for(int cur=l;cur<=r;cur++){ uh\I'
if(i1==mid+1) xVuGeanCv
data[cur]=temp[i2++]; j +@1frp
else if(i2>r) =y,_FFoS
data[cur]=temp[i1++]; _:+W0YS
else if(temp[i1] data[cur]=temp[i1++]; D2E~c? V
else D`3}j
data[cur]=temp[i2++]; vpvPRwJ
} aN).G1
} _MR|(mV
@za?<G>!'e
} +I/7eIG?|
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改进后的归并排序: v#IW;Rj8
%g5weiFM
package org.rut.util.algorithm.support; E+dr\Xhv
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import org.rut.util.algorithm.SortUtil; .r[DqC
szF[LRb
/** %.pX!jL
* @author treeroot (=CV")tF
* @since 2006-2-2 *^=`HE89S
* @version 1.0 llhJ,wD
*/ (nbqL+
public class ImprovedMergeSort implements SortUtil.Sort { 6NZ3(
[ k^6#TQcn
private static final int THRESHOLD = 10; $bF.6
8yOzD
/* /jC0[%~jV
* (non-Javadoc) R5X<8(4p
* ]Q-ON&/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #PVgx9T=_
*/ IJD'0/R'c
public void sort(int[] data) { Axk p
int[] temp=new int[data.length]; nrUrMnlg
mergeSort(data,temp,0,data.length-1); y,DK@X
} "6Nma)8
KAjKv_6=g
private void mergeSort(int[] data, int[] temp, int l, int r) { uWG'AmK_#E
int i, j, k; )Y\},O
int mid = (l + r) / 2; NlU:e}zGR
if (l == r) 16keCG\
return; J}i$ny_3OB
if ((mid - l) >= THRESHOLD) rxI?|}4
mergeSort(data, temp, l, mid); ;pU9ov4)
else wDem }uO
insertSort(data, l, mid - l + 1); -F4CHpua
if ((r - mid) > THRESHOLD) O#H`/z
mergeSort(data, temp, mid + 1, r); YCeE?S1gk3
else ZJP.-`U
insertSort(data, mid + 1, r - mid); A_{QY&%m
#`:60#l
for (i = l; i <= mid; i++) { \'GX^0yK
temp = data; Al$"k[-Uin
} x,2+9CCU
for (j = 1; j <= r - mid; j++) { {p9y{$
temp[r - j + 1] = data[j + mid]; I=D`:u\H
} > 9JzYI^
int a = temp[l]; _Eq:Qbw#
int b = temp[r]; \$VtwVQ,b
for (i = l, j = r, k = l; k <= r; k++) { |C=^:@}ri?
if (a < b) { hK@1 s
data[k] = temp[i++]; qX0IHe
a = temp; I:]s/r7
} else { Vd)iv\a
data[k] = temp[j--]; e&8pTD3
b = temp[j]; }Da8S|)H
} 9gn_\!Mp
} CYEqH2"3
} YXg:cXE8e
_:c8YJEG{
/** <hZA$.W3
* @param data 6@wnF>'/\
* @param l MGX,JW>L
* @param i (+@3Dr5o0}
*/ Vhz?9i6|g^
private void insertSort(int[] data, int start, int len) { '|J-8"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }f^K}*sK$5
} 3i?{E^
} n1y#gC
} r7C m
} yHCQY4/
G+m|A*[>
堆排序： A}~hc&J
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package org.rut.util.algorithm.support; h}q+Dw.i
6b-d#H/1Y
import org.rut.util.algorithm.SortUtil; Z:,HB]&;9
}-V .upl
/** ?j?{}Z
* @author treeroot %a8'6^k
* @since 2006-2-2 C(}9
* @version 1.0 6DaH+
*/ m1]rLeeEt
public class HeapSort implements SortUtil.Sort{ zST#X}
VXn]*Mo
/* (non-Javadoc) MZn7gT0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qk~QcVg
*/ [jDO8n/
public void sort(int[] data) { #ZCgpg$wM
MaxHeap h=new MaxHeap(); 6\\B{%3R2
h.init(data); ]o6yU#zn~e
for(int i=0;i h.remove(); #bsRL8@
System.arraycopy(h.queue,1,data,0,data.length); yeE_1C .
} OJ@';ZyT=
}s}b]v
private static class MaxHeap{ Lt@4F
]=WJ%p1l
void init(int[] data){ KKGAk\X
this.queue=new int[data.length+1]; YDi_Gl$
for(int i=0;i queue[++size]=data; oxPOfI1%]
fixUp(size); U[U$1LSS
} +'uF3-+WY
} 6M"J3\ x
z;#}uC
private int size=0; q&jZmr
[53@'@26
private int[] queue; +]I;C
_#f/VE
public int get() { q,aWF5m@
return queue[1]; +**H7: bO
} ^T(l3r
lH:TE=|4
public void remove() { nP 2rN_:4
SortUtil.swap(queue,1,size--); F8_pwJUpf-
fixDown(1); P%'bSx1
} "!E(=W?
file://fixdown n_$lRX5
private void fixDown(int k) { ?tqTG2!(
int j; r5lp<md
while ((j = k << 1) <= size) { DXSZ#^,S[W
if (j < size %26amp;%26amp; queue[j] j++; ;NLL?6~
if (queue[k]>queue[j]) file://不用交换 TjD`<k
break; %j2YCV7
SortUtil.swap(queue,j,k); eK/[jxNO
k = j; U QXT&w
} .X_k[l9
} .g(yTA
private void fixUp(int k) { e<~uU9 lg1
while (k > 1) { .A\9|sRZ5
int j = k >> 1; T6OIb
if (queue[j]>queue[k]) Tud[VS?99
break; &:akom8
SortUtil.swap(queue,j,k); 0eq>
k = j; TQE3/IL
} \{{B57/Isq
} o6xl,T%
E|6X.Ny]
} fU>"d>6!S
$o/?R]h
} J:#B,2F+^
oF]0o`U&a
SortUtil： E`LML?
Ywr^uy1V,/
package org.rut.util.algorithm; t.lm`=
A[htG\A` 0
import org.rut.util.algorithm.support.BubbleSort; l= ~]MSwY
import org.rut.util.algorithm.support.HeapSort; u6t.$a!5
import org.rut.util.algorithm.support.ImprovedMergeSort; ouVR[w>V
import org.rut.util.algorithm.support.ImprovedQuickSort; kn+`2-0
import org.rut.util.algorithm.support.InsertSort; jl3RE|M\<
import org.rut.util.algorithm.support.MergeSort; T>vHZZiO
import org.rut.util.algorithm.support.QuickSort; Nf-IDK
import org.rut.util.algorithm.support.SelectionSort; 9y.C])(2
import org.rut.util.algorithm.support.ShellSort; C<qJnB:B9
h(GgkTj4+
/** "*%=k%'
* @author treeroot qa`bR%eH
* @since 2006-2-2 NZ7a^xT_)
* @version 1.0 `+1*)bYxU
*/ S@N&W&W#~
public class SortUtil { 3|9)A+,#
public final static int INSERT = 1; =;dupz\7
public final static int BUBBLE = 2; 9p2"5x
public final static int SELECTION = 3; ,8+SQo#3
public final static int SHELL = 4; p8Lb*7W
public final static int QUICK = 5; )"t=sFxaB
public final static int IMPROVED_QUICK = 6; bC?t4-W
public final static int MERGE = 7; Wj.)wr!
public final static int IMPROVED_MERGE = 8; =]-!
public final static int HEAP = 9; c!{.BgGN
pR`.8MMc8
public static void sort(int[] data) { F~W*"i+EZ
sort(data, IMPROVED_QUICK); W`6nMFg
} VIAj]Ul
private static String[] name={ (zk'i13#6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y'2K7\>E
}; xx!o]D-}
{< jLfL1
private static Sort[] impl=new Sort[]{ %J~8a_vO
new InsertSort(), kl3#&>e
new BubbleSort(), dE/Vl/:
new SelectionSort(), 1tQZyHc42;
new ShellSort(), #3kR}Amow
new QuickSort(), 2}~1poyi>
new ImprovedQuickSort(), ',m,wp`
new MergeSort(), `j_R ?mY
new ImprovedMergeSort(), <| Xf4.
new HeapSort() $'?CY)h{
}; Zm&Zz^s
8{%/!ylJz
public static String toString(int algorithm){ N7+K$)3
return name[algorithm-1]; Q}\,7l
} cS QUK
=Q3Go8b4HJ
public static void sort(int[] data, int algorithm) { r;upJbSX
impl[algorithm-1].sort(data); +vDT^|2SF
} 99:`58G
]$0{PBndW
public static interface Sort { ^row=5]E
public void sort(int[] data); ,dZ 9=]
} <`-"K+e!J
CEqfsKrsxE
public static void swap(int[] data, int i, int j) { 1hi^
int temp = data; )z7.S"U
data = data[j]; P63z8^y
data[j] = temp; if#$wm%
} -7m;rD4J
} KGP2,U6