[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; WxVn&c\
} ':4}O#
int i1=l; &o*s !u
int i2=mid+1; &c!j`86y*
for(int cur=l;cur<=r;cur++){ @K$VV^wp
if(i1==mid+1) %@lV-(5q
data[cur]=temp[i2++]; 29Gwv
else if(i2>r) %XP_\lu]
data[cur]=temp[i1++]; G$;] ?g
else if(temp[i1] data[cur]=temp[i1++]; %RQC9!
else f0uUbJ5
data[cur]=temp[i2++]; eVw\v#gd
} [j)\v^m
} ]#Vo}CVP
+Lm3vj_N
} lAdDu
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改进后的归并排序: TL},Unq
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package org.rut.util.algorithm.support; ~L%Pz0Gg
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import org.rut.util.algorithm.SortUtil; 9wO/?
OUEI~b1
/** E?30J3S
* @author treeroot 1Pk mg%+
* @since 2006-2-2 iNod</+"K
* @version 1.0 r0\cc6
*/ ?EI'^xg
public class ImprovedMergeSort implements SortUtil.Sort { op hH9D
de> ?*%<
private static final int THRESHOLD = 10; =X-^YG3x
P?9nTG
/* \Fj5v$J-
* (non-Javadoc) <y@,3DD3A9
* p91`<>Iw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |@ikx{W
*/ <^lJr82
public void sort(int[] data) { }3v'Cp0L
int[] temp=new int[data.length]; $[Tt#CJw
mergeSort(data,temp,0,data.length-1); zRwb"
} `]*%:NZP@
J=I:T2bV&s
private void mergeSort(int[] data, int[] temp, int l, int r) { ic%?uWN
int i, j, k; .6> hD1'
int mid = (l + r) / 2; i 8l./Yt/
if (l == r) XB0a dp
return; &|v{#,ymeb
if ((mid - l) >= THRESHOLD) h ?uqLsRl
mergeSort(data, temp, l, mid); 06 QU
else 5Z/yhF.{
insertSort(data, l, mid - l + 1); 5]jx5!N
if ((r - mid) > THRESHOLD) )O,wRd>5
mergeSort(data, temp, mid + 1, r); 2Y400
else >(hSW~i~
insertSort(data, mid + 1, r - mid); N>+P WE$
S8 :"<B)
for (i = l; i <= mid; i++) { &J8Z@^
temp = data; hf;S]8|F
} V,V*30K5
for (j = 1; j <= r - mid; j++) { 6}ce1|mkg/
temp[r - j + 1] = data[j + mid]; }$o*
} IUOxGJ|rO
int a = temp[l]; B\\6#
int b = temp[r]; Lp_$?MCD.
for (i = l, j = r, k = l; k <= r; k++) { `/z_rqJ0CL
if (a < b) { k@#5$Ejc2
data[k] = temp[i++]; ,zQo {.
a = temp; UQ/qBbn
} else { s[3e=N
data[k] = temp[j--]; y8G&Wg aCi
b = temp[j]; FY$fV"s
} gX[|;IZ0o
} )FRM_$t
} bF*NWm$Lf
h@=7R
/** wZ#Rlv,3Wa
* @param data ~A6"sb=
* @param l {J (R
* @param i MR`:5e
*/ 1%%'6cWWu
private void insertSort(int[] data, int start, int len) { WzjL-a(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yQ9ZhdQS
} Mtm/}I
} ^$!987"
} W4(v6>5l
} sONBQ9
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堆排序： wuA^'T
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package org.rut.util.algorithm.support; +noZ<KFW "
S=' wJ@?;
import org.rut.util.algorithm.SortUtil; Ht#@'x
Cezh l
/** PocYFhWQ`
* @author treeroot qD#VbvRc9+
* @since 2006-2-2 bp#:UUO%S
* @version 1.0 2R]&v;A
*/ J{`eLmTu
public class HeapSort implements SortUtil.Sort{ Y2C9(Zk U
XAPYpBgm
/* (non-Javadoc) ~4\,&HH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VU|;:
*/ Wqra8u#
public void sort(int[] data) { oBA`|yW{U
MaxHeap h=new MaxHeap(); Cp#)wxi6[y
h.init(data); A3HF,EG
for(int i=0;i h.remove(); {XgnZ`*
System.arraycopy(h.queue,1,data,0,data.length); 5o#Yt
} FW8-'~
rz%<AF Z
private static class MaxHeap{ Rs*vm
$<|ocUC7
void init(int[] data){ Q.+|xwz
this.queue=new int[data.length+1]; [$\z'}
for(int i=0;i queue[++size]=data; \?DR s
fixUp(size); t|V0x3X
} T$KF< =
} C)Jn[/BD
k;I &.H
private int size=0; EATu KLP\
3$VxRz)
private int[] queue; 3LDsxE=N:q
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public int get() { ;Wc4qJ.@
return queue[1]; (vc|7DX M
} iEIg:
8!mc@$Z
public void remove() { I;7nb4]AmF
SortUtil.swap(queue,1,size--); 1tB[_$s
fixDown(1); BByCMY
} a{SBCy
file://fixdown B&Y_2)v
private void fixDown(int k) { 2 -Xdoxw
int j; #eK=
while ((j = k << 1) <= size) { ow6*Xr8eQ
if (j < size %26amp;%26amp; queue[j] j++; ]JE TeZ^/
if (queue[k]>queue[j]) file://不用交换 Z{R[Wx
break; |>2FRPK
SortUtil.swap(queue,j,k); %+-C3\'
k = j; {f/]5x(_
} {_#yz\j
} hXn3,3f3oZ
private void fixUp(int k) { YE}s
while (k > 1) { w!SkWS b,~
int j = k >> 1; l&$$w!n0w
if (queue[j]>queue[k]) @ O>&5gB1u
break; 8' K0L(3[
SortUtil.swap(queue,j,k); ;n6b%,s
k = j; -x`G2i
} 1mH%H*#
} R}:KE&tq
!}KqB8;
} ~u87H?
[zkikZy
} o.-C|IXG
}-@4vl x$
SortUtil： ' GG=Ebt
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package org.rut.util.algorithm; is?2DcSl5
gRJfX%*F
import org.rut.util.algorithm.support.BubbleSort; S/[E8T"
import org.rut.util.algorithm.support.HeapSort; *[+)7
import org.rut.util.algorithm.support.ImprovedMergeSort; %Sk@GNI_
import org.rut.util.algorithm.support.ImprovedQuickSort; 9\;|x
import org.rut.util.algorithm.support.InsertSort; 7^*"O&y_al
import org.rut.util.algorithm.support.MergeSort; awewYf$li
import org.rut.util.algorithm.support.QuickSort; ?=;qK{)37
import org.rut.util.algorithm.support.SelectionSort; ^Q+i=y{W
import org.rut.util.algorithm.support.ShellSort; m~#%Q?_ %
J#2!ZQE 3
/** lb*8G
* @author treeroot ww k PF
* @since 2006-2-2 KvPX=/&Zu
* @version 1.0 Zm ogM7B
*/ BV`-=wRC
public class SortUtil { a4i:|
public final static int INSERT = 1; 5S{7En~zUE
public final static int BUBBLE = 2; !ZRs;UZ>o
public final static int SELECTION = 3; o>/O++7Ra
public final static int SHELL = 4; c`*TPqw(B[
public final static int QUICK = 5; ,m=4@ofX
public final static int IMPROVED_QUICK = 6; -fI@])$9J
public final static int MERGE = 7; j2l55@
public final static int IMPROVED_MERGE = 8; 8qEK+yi,
public final static int HEAP = 9; ^!8P<y
_c$9eAe
public static void sort(int[] data) { B[4pX +f
sort(data, IMPROVED_QUICK); {<>K]P~wD
} sOCs13A"
private static String[] name={ WY:&ugGx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" llV3ka^!
}; Z?Hs@j
G~7 i@Zs
private static Sort[] impl=new Sort[]{ gb=/#G0R
new InsertSort(), 6 15s5ZA
new BubbleSort(), ] b9-k
new SelectionSort(), aVL=K
new ShellSort(), %M|,b!eF
new QuickSort(), >>i@r@
new ImprovedQuickSort(), 3bZIYF2@
new MergeSort(), ORXm&z)
new ImprovedMergeSort(), wa=uUM_4u^
new HeapSort() 3@Z#.FV~C[
}; #@@Mxr'F
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public static String toString(int algorithm){ vsWHk7 9
return name[algorithm-1]; hN2:d1f0
} wkqX^i7ls
S [h];eM
public static void sort(int[] data, int algorithm) { %?^6).aEK
impl[algorithm-1].sort(data); W!!S!JF
} obrl#(\P
vDl- "!G1
public static interface Sort { Uo12gIX
public void sort(int[] data); <GHYt#GIZ+
} [[d(jV=*
@~c6qh
public static void swap(int[] data, int i, int j) { ]ul$*
int temp = data; x_Jwd^`t!
data = data[j]; 1i:|3PA~
data[j] = temp; %CUGm$nH
} 'I;!pUfVp
} km^^T_ M/