[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; wu11)HFL|z
} 7J`v#
int i1=l; ;;rx)|\<R
int i2=mid+1; ^&y*=6C
for(int cur=l;cur<=r;cur++){ bivo7_
if(i1==mid+1) GUM-|[~
data[cur]=temp[i2++]; $FIJI^Kd7
else if(i2>r) >Di`zw~
data[cur]=temp[i1++]; *SI,K)BP
else if(temp[i1] data[cur]=temp[i1++]; v0(}"0
else VKu_l
data[cur]=temp[i2++]; <0hVDk~
} 7bE`P[
} >ifys)wg>
zVe,HKF/
} &U=_:]/
#nft{AN
改进后的归并排序: -kP2Brm
9-&@Y
package org.rut.util.algorithm.support; dD'KP4Io@
n ~&ssFC
import org.rut.util.algorithm.SortUtil; wv\"(e7(
r4gLoHD)
/** y?3u6q++
* @author treeroot *%_M?^
* @since 2006-2-2 Au/'|%2#(
* @version 1.0 pNuU{:9 B0
*/ nehk8+eV_
public class ImprovedMergeSort implements SortUtil.Sort { 2$b1q!g<
vO"E4s
private static final int THRESHOLD = 10; J|o<;9dg1
KyDd( 'i
/* q3-cWfU
* (non-Javadoc) }TuMMO4+
* 1rue+GL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CN-4FI)1D9
*/ ;Z;` BGZJ
public void sort(int[] data) { cFJZ|Ld
int[] temp=new int[data.length]; rW~G'
mergeSort(data,temp,0,data.length-1); ,If"4C!w
} BVH)!]m0
e$Y7V
private void mergeSort(int[] data, int[] temp, int l, int r) { :x3DuQP
int i, j, k; tpeMq-
int mid = (l + r) / 2; {- MhhRa5
if (l == r) @Xh8kvc81
return; ,O^kZ}b
if ((mid - l) >= THRESHOLD) H.l WHM+H4
mergeSort(data, temp, l, mid); Po\+zZjo
else 8(A k
insertSort(data, l, mid - l + 1); w)YTHY(k;
if ((r - mid) > THRESHOLD) &?y|Pn
mergeSort(data, temp, mid + 1, r); |\"%Dy[m
else i*09m^r
insertSort(data, mid + 1, r - mid); QZO<'q`L
+:c}LCI9<
for (i = l; i <= mid; i++) { yd45y}uS;F
temp = data; eUgKwu;
} %\B?X;(
for (j = 1; j <= r - mid; j++) { 6/(Z*L"~6k
temp[r - j + 1] = data[j + mid]; <3=k
} JE$$6X
int a = temp[l]; LA6Ik_-F
int b = temp[r]; rXe+#`m2
for (i = l, j = r, k = l; k <= r; k++) { eB,@oo%
if (a < b) { Tn38]UL
data[k] = temp[i++]; %F;uW[4r
a = temp; (15.?9
} else { NB( GE
data[k] = temp[j--]; '$ G%HUn
b = temp[j]; 9N) Ea:N
} C8:y+pH_U;
} )^E6VD&6
} %6@m~;c0
3zM>2)T-
/** /wHfc[b>
* @param data ZQ_~ L!ot
* @param l dGR #l)
* @param i IY(;:#l
*/ SQuW`EHBgs
private void insertSort(int[] data, int start, int len) { (Fk&~/SP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V0F1X s`
} _.,"`U; H
} ~%: TE}
} +]VW[$W
} :?#wWF.
0J= $ A
堆排序： BT5~MYBl
kh>i#9Ie
package org.rut.util.algorithm.support; _9iF`Q
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import org.rut.util.algorithm.SortUtil; +gb"} cN
&23t/`
/** =VZ0+Yl
* @author treeroot M3)Id?|]6
* @since 2006-2-2 Vt4,?"
* @version 1.0 2-"`%rE
*/ MPsm)jqX
public class HeapSort implements SortUtil.Sort{ jSvo-
"fd'~e$S#
/* (non-Javadoc) +j6^g*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) elP#s5l4
*/ x&FBh!5H
public void sort(int[] data) { <L3ig%#B
MaxHeap h=new MaxHeap(); 1|3vwgRhs
h.init(data); Mgu=cm)
for(int i=0;i h.remove(); t;[?Q\
System.arraycopy(h.queue,1,data,0,data.length); 0LUw
} -kzg(+sm
3HX-lg`0
private static class MaxHeap{ v%Su#xq/
NbhQ-
void init(int[] data){ 6uWPIM;
this.queue=new int[data.length+1]; #j"N5e}U
for(int i=0;i queue[++size]=data; ^c>ROpic
fixUp(size); AiV1 vD`
} 88atj+N]
} LO,k'gg<
DEpn>
private int size=0; =,W~^<\"
8';huq@C{
private int[] queue; /KCIb:U
H^w Inkf>
public int get() { l`AA<Rj*O-
return queue[1]; Be0v&Q_NK
} |DoD.?v
,#80`&\%
public void remove() { _,|N`BBqd
SortUtil.swap(queue,1,size--); a[V4EX1E
fixDown(1); i}ti
} s#)tiCSVW
file://fixdown =xHzhh
private void fixDown(int k) { 7C^W<SUo
int j; '\B!1B>T
while ((j = k << 1) <= size) { f<2<8xS
if (j < size %26amp;%26amp; queue[j] j++; G%fNGQwT
if (queue[k]>queue[j]) file://不用交换 Kdb:Q0B
break; ^g N?Io
SortUtil.swap(queue,j,k); s!K9-qZl<
k = j; KHt#mQy)9
} 1VO>Bh.Wm
} g6<D 1r
private void fixUp(int k) { [ST7CrwC
while (k > 1) { .?-]+-J?`
int j = k >> 1; 1BA5|
if (queue[j]>queue[k]) P;lDri
break; >]l7AZ:,
SortUtil.swap(queue,j,k); Gv}~
k = j; e{IwFX
} QU^?a~r
} w<=-n;2
se]QEd7]7
} ln=:E$jX
@RVj~J.A
} >W@3_{0
>WW5;7$
SortUtil： 9TOqA4
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package org.rut.util.algorithm; Gw}b8N6E
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import org.rut.util.algorithm.support.BubbleSort; "Bbd[ZI8
import org.rut.util.algorithm.support.HeapSort; {}v<2bS
import org.rut.util.algorithm.support.ImprovedMergeSort; !5h@uar
import org.rut.util.algorithm.support.ImprovedQuickSort; I)cA:Ip
import org.rut.util.algorithm.support.InsertSort; PsoW:t
import org.rut.util.algorithm.support.MergeSort; Z <vTr6?
import org.rut.util.algorithm.support.QuickSort; 3gU*,K7
import org.rut.util.algorithm.support.SelectionSort; R//S(eU68\
import org.rut.util.algorithm.support.ShellSort; Ewczq1%l:
5_Opx=
/** ALnE[}N6,
* @author treeroot 5Lm<3:7Q+
* @since 2006-2-2 3r,^is
* @version 1.0 @ Yzj
*/ 91j.%#[v'
public class SortUtil { t_ZWd#x+;
public final static int INSERT = 1; RkXW(T`
public final static int BUBBLE = 2; [^E{Yz=8,
public final static int SELECTION = 3; \{M/Do:
public final static int SHELL = 4; %W]"JwRu
public final static int QUICK = 5; ^G]H9qY-e
public final static int IMPROVED_QUICK = 6; D<XRu4^;
public final static int MERGE = 7; y5lhmbl: e
public final static int IMPROVED_MERGE = 8; !7fVO2m T
public final static int HEAP = 9; 9Kd:7@U
s~MCt|a
public static void sort(int[] data) { qz/d6-0"
sort(data, IMPROVED_QUICK); tR% &.,2
} i$W=5B>SO
private static String[] name={ ~'L`RJR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z:s:NvFX
}; Pi:=0,"XOp
xSoXf0zq:
private static Sort[] impl=new Sort[]{ 0ud>oh4WPR
new InsertSort(), H@hHEzO
new BubbleSort(), Qp]-4%^Vz
new SelectionSort(), Sk&l8"
new ShellSort(), b!xm=U
new QuickSort(), ^5d9n<_xnQ
new ImprovedQuickSort(), 1*J#:|({(
new MergeSort(), `di/nv)
new ImprovedMergeSort(), b9@VD)J0E
new HeapSort() \H5{[ZUn
}; p?zh4:\F+
C1KO]e>
public static String toString(int algorithm){ -$m?ShDd
return name[algorithm-1]; ^L;k
} Q.Ljz Z
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public static void sort(int[] data, int algorithm) { 5!)_"u3
impl[algorithm-1].sort(data); oc3}L^aD
} (N25.}8Y
'=eE6=m^K
public static interface Sort { bkfk9P
public void sort(int[] data); Rk.GrLp
} vswBK-w(Z
[v$NxmRu
public static void swap(int[] data, int i, int j) { #[{xEVf
int temp = data; J=qPc}+
data = data[j]; bP,_H
data[j] = temp; %!e;sL~&
} PC}m.tE
} SQd`xbIuL