[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; mO\=#Q>
} a>nV!b\n5
int i1=l; 9>5]y}.{
int i2=mid+1; E|B1h!!\c
for(int cur=l;cur<=r;cur++){ 'BEM:1)
if(i1==mid+1) YjG:ECj}
data[cur]=temp[i2++]; T=cb:PD{%
else if(i2>r) nQ'AB~ Do
data[cur]=temp[i1++]; !un_JZD
else if(temp[i1] data[cur]=temp[i1++]; pC)S9Kl
else hN:2(x
data[cur]=temp[i2++]; j7Lw(AJ
} f^XfIH_#
} eJ$ {`&J
B;L^!sLP
} 2) A$bx
ds QGj&
改进后的归并排序: g\,HiKBXd
v*e=oyx[
package org.rut.util.algorithm.support; LZ~$=<
&$NVEmW-J
import org.rut.util.algorithm.SortUtil; AyZBH&}RZ
~48mCD
/** TqMy">>
* @author treeroot 4dvuw{NZ
* @since 2006-2-2 V6 ,59
* @version 1.0 )'?@raB!
*/ u:4?$%rB
public class ImprovedMergeSort implements SortUtil.Sort { PR1%
j,JGs[A
private static final int THRESHOLD = 10; nF|m*_DW
C[(Exe
/* `L}Irt}
* (non-Javadoc) N+ R/ti
* 6~Xe$fP(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?x &"EhA>
*/ \LW '6 pQ_
public void sort(int[] data) { [kq+a]q
int[] temp=new int[data.length]; uH!;4@uI
mergeSort(data,temp,0,data.length-1); ma26|N5
} ag$UNV
lV!@h}mG
private void mergeSort(int[] data, int[] temp, int l, int r) { %!1:BQ,p,i
int i, j, k; %S4pkFR
int mid = (l + r) / 2; -T-h~5
if (l == r) CpICb9w
return; )<jT;cT!&
if ((mid - l) >= THRESHOLD) $PNIuC?=
mergeSort(data, temp, l, mid); kQm\;[R
else :ITz\m
insertSort(data, l, mid - l + 1); <)(STo
if ((r - mid) > THRESHOLD) xlaBOKa%
mergeSort(data, temp, mid + 1, r); wXsA-H/`
else X\1'd,V
insertSort(data, mid + 1, r - mid); i'9
iPJZ%
for (i = l; i <= mid; i++) { 8[;U|SR"
temp = data; -xf=dzm)
} G%K<YyAP
for (j = 1; j <= r - mid; j++) { } Pc6_#
temp[r - j + 1] = data[j + mid]; &wZ:$lK#o
} p,9eZUGy
int a = temp[l]; G l*C"V
int b = temp[r]; "I]% aK0
for (i = l, j = r, k = l; k <= r; k++) { yeNC-U<
if (a < b) { %k3a34P@
data[k] = temp[i++]; X/nb7_M
a = temp; EmR#)c~(W
} else { `W[oLQ
data[k] = temp[j--]; Y&5h_3K;<
b = temp[j]; ;wz YZ5=Di
} c;bp[Y3R
} N|h}'p
} ZUMzWK5Th
o^},L?
/** "ND 7,rQ
* @param data E-irB/0
* @param l vV|u+v{
* @param i z>hG'
*/ h^bbU.
private void insertSort(int[] data, int start, int len) { U:xr['
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ' 7>V4\"
} P{)eZINlE
} *Oo2rk nQ
} 7{XI^I:n
} -q\1Tlc]3
4>>d "<}C
堆排序： O&irgc!
dd>stp
package org.rut.util.algorithm.support; jO$3>q
Y9 ,KOs
import org.rut.util.algorithm.SortUtil; FbHk6(/)
? S>"yAoe
/** i%0Ml:Y
* @author treeroot 'zZN]P
* @since 2006-2-2 +X0?bVT
* @version 1.0 Yt7R[|
*/ m>?OjA!
public class HeapSort implements SortUtil.Sort{ m Fwx},dl
*9((b;Ju
/* (non-Javadoc) a%sr*`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^6|Q$]}Ok
*/ e&E""ye
public void sort(int[] data) { \:\rkc9LI
MaxHeap h=new MaxHeap(); gz-}nCSi
h.init(data); .T/\5_Bx
for(int i=0;i h.remove(); zVYX#- nv
System.arraycopy(h.queue,1,data,0,data.length); c Q|nL
} sV'(y>PP%
:}v&TQ
private static class MaxHeap{ ^c!"*L0E
+glT5sOk
void init(int[] data){ G0|j3y9$
this.queue=new int[data.length+1]; _1f!9ghT\
for(int i=0;i queue[++size]=data; 6+e@)[l.zc
fixUp(size); ksT2_Ic
} N)03{$WM
} iZB?5|*
k/?5Fs!#
private int size=0; tpO%)*
0p:FAvvNI
private int[] queue; p@y?xZS
c%yhODq/
public int get() { D|@*HX@_Xp
return queue[1]; iVLfAN @
} <T+)~&g$
o nt8q8
public void remove() { [nB[]j<R*
SortUtil.swap(queue,1,size--); |TatRB3>
fixDown(1); d:.S]OI0
} U6e 0{n
file://fixdown UmcPpZ
private void fixDown(int k) { bf|s=,D
int j; +] >o@
while ((j = k << 1) <= size) { K>hQls+
if (j < size %26amp;%26amp; queue[j] j++; oW3j|V
if (queue[k]>queue[j]) file://不用交换 z^j7wMQ
break; _]@
SortUtil.swap(queue,j,k); @9lV~,,U
k = j; kAA1+rG
} (`\ DDJ[
} ^pruQp1X
private void fixUp(int k) { S=B?bD_,c
while (k > 1) { 3DRJl,v
int j = k >> 1; Ybo:2e
if (queue[j]>queue[k]) /N.xh
break; GdHFgxI
SortUtil.swap(queue,j,k); q#B=PZ'NA
k = j; P0VXHE1p
} ix2V?\
} Wu3or"lcw*
g<pr(7jO
} p5`iq~e9
[qbZp1s|(
} yuIy?K
Cw6\'p%l-\
SortUtil： 0M=A,`qk
(iQ< [3C=
package org.rut.util.algorithm; >G7dw1;
E/[>#%@i
import org.rut.util.algorithm.support.BubbleSort; q@k/"ee*?
import org.rut.util.algorithm.support.HeapSort; }z%fQbw
import org.rut.util.algorithm.support.ImprovedMergeSort; tQ=3Oa[u
import org.rut.util.algorithm.support.ImprovedQuickSort; )E9[=4+*C$
import org.rut.util.algorithm.support.InsertSort; UMtnb:ek
import org.rut.util.algorithm.support.MergeSort; ac
import org.rut.util.algorithm.support.QuickSort; 8J|2b; Vf
import org.rut.util.algorithm.support.SelectionSort; Buc{dcL/
import org.rut.util.algorithm.support.ShellSort; NULew]:5
|i_+b@Lul
/** _y:-_q
* @author treeroot )Fk*'6
* @since 2006-2-2 9o%k [n
* @version 1.0 e1cqzhI=nA
*/ HiAj3
public class SortUtil { 7PTw'+{
public final static int INSERT = 1; nv$>iJ^~H
public final static int BUBBLE = 2; M3q%(!2
public final static int SELECTION = 3; kU:ge
public final static int SHELL = 4; tofX.oi+C$
public final static int QUICK = 5; 4eVQO%&2
public final static int IMPROVED_QUICK = 6; K0;caqE^
public final static int MERGE = 7; g0({$2Q7R
public final static int IMPROVED_MERGE = 8; <pA%|]
public final static int HEAP = 9; "&Q sv-9t
2{U5*\FhVX
public static void sort(int[] data) { p>#sR4d>
sort(data, IMPROVED_QUICK); Q1kZ+b&
} (\8IgQ{
private static String[] name={ pLYLHS`*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |D*a"*1+A
}; wrP3:!=
>EE}P|=-
private static Sort[] impl=new Sort[]{ M./1.k&@
new InsertSort(), qa-%j+
new BubbleSort(), \ -n&z;`
new SelectionSort(), z }3`9
new ShellSort(), _uXb 9
new QuickSort(), Cb4.N8
new ImprovedQuickSort(), \/XU v(
new MergeSort(), %f)%FN.S
new ImprovedMergeSort(), J:Mn5hdK=
new HeapSort() >c`r&W.t
}; h2jrO9
M!i["($_
public static String toString(int algorithm){ Z.}Z2K
return name[algorithm-1]; "+XF'ZO
} kz0pX-@b
-HwqR Ys
public static void sort(int[] data, int algorithm) { y^0 mf|
impl[algorithm-1].sort(data); gQQve{'
} \jmT#Gt`9
?,}:)oA_
public static interface Sort { inHlL
public void sort(int[] data); vzX%x ul
} &s#OiF8
mUan(iJ
public static void swap(int[] data, int i, int j) { D :)HKD.
int temp = data; FPb4VJ|xm
data = data[j]; lvOM1I
data[j] = temp; "tT68
} cqYMzS t
} ^O.` P