[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; n/-p;#R
} A Eyr_!G,
int i1=l; nkCRe
int i2=mid+1; i-"h"nF"
for(int cur=l;cur<=r;cur++){ v%l|S{>(
if(i1==mid+1) 5Ky9Pz
data[cur]=temp[i2++]; ,mE]?XyO
else if(i2>r) 43orR !.Z
data[cur]=temp[i1++]; H/v37%p7
else if(temp[i1] data[cur]=temp[i1++]; 7,&]1+n
else i>kNz(*
data[cur]=temp[i2++]; (J,Oh
} 9>$%F;JP44
} ?GMeA}j
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} g)r,q&*
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改进后的归并排序: M'!!EQo
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package org.rut.util.algorithm.support; u):Rw
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import org.rut.util.algorithm.SortUtil; 1r-,VX7
ow>[#.ua
/** aY1#K6(y
* @author treeroot J\,e/{,X
* @since 2006-2-2 :EldP,s#x%
* @version 1.0 Z]>e& N
*/ C7*Yg$`{
public class ImprovedMergeSort implements SortUtil.Sort { r{:la56Xd
:#!F 7u
private static final int THRESHOLD = 10; ~pBxFA
dU04/]modD
/* xzf)_ <
* (non-Javadoc) !E>3N:
* ])ZJ1QL1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :-'ri Ry
*/ CYic_rF$
public void sort(int[] data) { WZO 0u
int[] temp=new int[data.length]; >5@ 0lYhH
mergeSort(data,temp,0,data.length-1); T.Y4L
} ABYW1K=
ah@GSu;7
private void mergeSort(int[] data, int[] temp, int l, int r) { ~(doy@0M
int i, j, k; WaO;hy~us
int mid = (l + r) / 2; "@'9+$i6
if (l == r) By"ul:.D
return; H-y-7PW*~
if ((mid - l) >= THRESHOLD) ?B31t9
mergeSort(data, temp, l, mid); 9lwo/(s
else ^J=txsx
insertSort(data, l, mid - l + 1); *q9$SDm
if ((r - mid) > THRESHOLD) { dxyBDK
mergeSort(data, temp, mid + 1, r); AE@Rn(1.
else KB-#):'
insertSort(data, mid + 1, r - mid); L$07u{Q
)t 7HioQ
for (i = l; i <= mid; i++) { -`<N,
temp = data; ]$k m
} Gqu0M`+7
for (j = 1; j <= r - mid; j++) { rlh6\Fa
temp[r - j + 1] = data[j + mid]; HOI`F3#XI
} w0>)y-
int a = temp[l]; *xNjhR]7v
int b = temp[r]; s5|)4Zac
for (i = l, j = r, k = l; k <= r; k++) { H_$f v_
if (a < b) { WQ`P^5e
data[k] = temp[i++]; BHBR_7
a = temp; AyXKhj#Ml
} else { vb2O4%7tw
data[k] = temp[j--]; _5 -"<
b = temp[j]; ~x#-#nuh"
} E$fy*enON
} gM]/Y6*$b
} Zl/+HU~
UE](`|4H
/** 78A4n C
* @param data H zK=UcD
* @param l \}(-9dr
* @param i ol>=tk 8}
*/ }{PtQc6RL!
private void insertSort(int[] data, int start, int len) { 4y)1*VU:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D#(Pg
} bJ[1'Es`
} blS4AQ?b^
} U}5KAi 9Z
} ;L{y3CWT
dTNgrW`4
堆排序： XX;%:?n
JIkmtZv
package org.rut.util.algorithm.support; K1yM'6Zw
unB "dE
import org.rut.util.algorithm.SortUtil; *Fs^T^ ?r
Fsdn2{g8U
/** g[Y$SgJ
* @author treeroot <0MUn#7'
* @since 2006-2-2 $a]dxRkz
* @version 1.0 *gKr1}M
*/ UY^f|f&
public class HeapSort implements SortUtil.Sort{ =z dti'2{4
7tnzgtal
/* (non-Javadoc) 9]9(o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }gt~{9?c
*/ B)iJH
public void sort(int[] data) { [! o-F;
MaxHeap h=new MaxHeap(); z[Qv}pv
h.init(data); 3Pq)RD|hn
for(int i=0;i h.remove(); *GMRu,u2
System.arraycopy(h.queue,1,data,0,data.length); ZaV@}=Rd8
} A`8If
YDL)F<Y
private static class MaxHeap{ n*uZ=M_/Q
_E 8SX v
void init(int[] data){ #pK)
this.queue=new int[data.length+1]; lDXH<W?
for(int i=0;i queue[++size]=data; S^.=j oI
fixUp(size); sa?;D
} gr7_oJ:R
} 2y,wN"qH*
ivk|-C'\
private int size=0; hkxZ=l
'r0gqtB
private int[] queue; `VbG%y&I
_!D$Aj
public int get() { N"{o3QmA
return queue[1]; AJ}Q,E
} pQi -
^~od*:
public void remove() { 5{[0Clb)
SortUtil.swap(queue,1,size--); R&A.F+Zgt
fixDown(1); h:wD &Fh8
} 8'$n|<1X
file://fixdown 04TV./uA
private void fixDown(int k) { }"v"^5
int j; im"v75 tc
while ((j = k << 1) <= size) { NgKNT}JDv
if (j < size %26amp;%26amp; queue[j] j++; !k^\`jMzw
if (queue[k]>queue[j]) file://不用交换 7y&`H
break; n_j[hA
SortUtil.swap(queue,j,k); ty ?y&~axk
k = j; g=wnly
} Q]C1m<x
} Ym6[~=~EK
private void fixUp(int k) { .*{LPfD|
while (k > 1) { SV >EB;<
int j = k >> 1; tee%E=P
if (queue[j]>queue[k]) j.sf FS
break; ,==lgM2V>
SortUtil.swap(queue,j,k); e"Z~%,^A
k = j; VPuzu|
} 0FBifK
} W=drp>Uj
+9t@eHJT1
} pmZr<xs
vnE,}(M
} 4I$#R
9S}PCAA;
SortUtil： a[!':-R`s
:Fh*4 &Z
package org.rut.util.algorithm; :hr%iu
\VW.>@s~
import org.rut.util.algorithm.support.BubbleSort; b.F2m(e2
import org.rut.util.algorithm.support.HeapSort; pdM|dGq^
import org.rut.util.algorithm.support.ImprovedMergeSort; c`TgxMu
import org.rut.util.algorithm.support.ImprovedQuickSort; NW$Z}?I
import org.rut.util.algorithm.support.InsertSort; |jlR],
import org.rut.util.algorithm.support.MergeSort; -H{{
import org.rut.util.algorithm.support.QuickSort; k~R_Pq S
import org.rut.util.algorithm.support.SelectionSort; iIg_S13
import org.rut.util.algorithm.support.ShellSort; ,+XQ!y%
NGNn_1
/** ~{J.br`
* @author treeroot K:y>wyzl
* @since 2006-2-2 Li}yK[\]
* @version 1.0 qzq>C"z\Y$
*/ &"=inkh
public class SortUtil { Q-AN~k8+)[
public final static int INSERT = 1; k5^'b#v
public final static int BUBBLE = 2; R6ywc"xE
public final static int SELECTION = 3; Fik*7!XQ8
public final static int SHELL = 4; o9JJ_-O"
public final static int QUICK = 5; +:D0tYk2B
public final static int IMPROVED_QUICK = 6; #+XKfumLk
public final static int MERGE = 7; K}6}Opr,Tt
public final static int IMPROVED_MERGE = 8; {aU~[5L3(
public final static int HEAP = 9; 3?C$Tl2G8
'kp:yI7w
public static void sort(int[] data) { <w[)T`4N
sort(data, IMPROVED_QUICK); zg]9~i8
} ~s+\Y/@A
private static String[] name={ 9+pnpaZB0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }ZV$_
}; /Z-|E
P'zA=Rd&~>
private static Sort[] impl=new Sort[]{ yVSJn>l!
new InsertSort(), Hh,\>= ':
new BubbleSort(), j $L
new SelectionSort(), ?'^xO:
new ShellSort(), RE*;nSVFt
new QuickSort(), K@+&5\y]
new ImprovedQuickSort(), hD sFsG
new MergeSort(), 233jT@Z
new ImprovedMergeSort(), iX}EJD{f
new HeapSort() pX"f "
}; I/t2c=f
po!0j+r3
public static String toString(int algorithm){ L_Om<LO2
return name[algorithm-1]; Y'58.8hl
} ?bY'J6n.
nD|Bo 9
public static void sort(int[] data, int algorithm) { rcAx3AK.
impl[algorithm-1].sort(data); !Vy/-N
} aR+vY1d"
c.r]w
public static interface Sort { E<Efxb'p
public void sort(int[] data); -:Yx1Y3 [
} cJGU~\
5Q =o.wf
public static void swap(int[] data, int i, int j) { @}qMI
int temp = data; \K55|3~R
data = data[j]; K '7M\:zy
data[j] = temp; C,&r7
} vT)FLhH6*
} sBt,y_LW