[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; Zr/r2
} gQVBA %
int i1=l; yY=<'{!
int i2=mid+1; c[(Pg%
for(int cur=l;cur<=r;cur++){ n~r 9!m$<
if(i1==mid+1) RI.2F*|
data[cur]=temp[i2++]; bH9Le
else if(i2>r) 6].:.b\qQc
data[cur]=temp[i1++]; !$xu(D.
else if(temp[i1] data[cur]=temp[i1++]; Eu<r$6Q0}o
else 'CV^M(o'9
data[cur]=temp[i2++]; vgG}d8MW37
} ;)/@Xx
} oK+Lzb\d{M
H'Qo\L4H
} ZXXiL#^
W'/>et
改进后的归并排序: &^QPkX@p
^X?D#\
package org.rut.util.algorithm.support; Ie_I7YJ
y?:dE.5p|
import org.rut.util.algorithm.SortUtil; *8A6Q9YT
/^<en(0=P
/** #BJ\{"b_}z
* @author treeroot ;;#nV$
* @since 2006-2-2 y:so L:(F
* @version 1.0 EZj1jpL
*/ @EZ>f5IO+
public class ImprovedMergeSort implements SortUtil.Sort { C3"&sdLb$
rxE&fjW
private static final int THRESHOLD = 10; 0D3OE.$0
JZx%J)
/* [X"k> Sq
* (non-Javadoc) l)Mh2lA,=
* W<'<'z5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $$gtZ{ukQ
*/ f1cl';
public void sort(int[] data) { SGf9U^ds
int[] temp=new int[data.length]; )U98
mergeSort(data,temp,0,data.length-1); aqL<v94wX
} RaNeZhF>M
Jt=>-Spj
private void mergeSort(int[] data, int[] temp, int l, int r) { Bymny>.M
int i, j, k; WYO\'W
int mid = (l + r) / 2; Y3oMh,
if (l == r) i?>Hr|
return; lX;mhJj!
if ((mid - l) >= THRESHOLD) MUwVG>b8J~
mergeSort(data, temp, l, mid); AzjMv6N
else h}6_ybmZ
insertSort(data, l, mid - l + 1); tgN92Q.i6T
if ((r - mid) > THRESHOLD) #5{sglC"|F
mergeSort(data, temp, mid + 1, r); j%xBo:
else Bw-s6MS
insertSort(data, mid + 1, r - mid); K2|7%
&oN/_7y
for (i = l; i <= mid; i++) { fM":f| G
temp = data; P|}\/}{`
} xrI}3T
for (j = 1; j <= r - mid; j++) { -Bv12ymLG
temp[r - j + 1] = data[j + mid]; bXvbddu)}
} ,}7_[b)&V
int a = temp[l]; 1uM/2sX
int b = temp[r]; ua#K>sur.
for (i = l, j = r, k = l; k <= r; k++) { fv?45f
if (a < b) { R}k69-1vL
data[k] = temp[i++]; pt})JMm
a = temp; ,y.3Fe
} else { }tR'Hz2
data[k] = temp[j--]; qJ Gm8^b-
b = temp[j]; =]KIkS3
} e^frVEV
} 7^wE$7hS
} cjY@Ot*i$
4A o{M
/** ND,`QjmZ
* @param data _LLshV3
* @param l 3^~Zj95M
* @param i hAAUecx
*/ Mjw[:70
private void insertSort(int[] data, int start, int len) { {PmzkT}LF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B\zoJg&7(
} @_O3&ZK
} .zwVCW,u
} K+> V|zKuk
} a7 )@BzF#
R0IF'
堆排序： M,G8*HI"
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package org.rut.util.algorithm.support; x!+Z{x
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import org.rut.util.algorithm.SortUtil; ua:9`+Dff
m5qCq9Y
/** /j %_t
* @author treeroot L9J;8+ge
* @since 2006-2-2 gvr]]}h:O
* @version 1.0 .+uVgSN
*/ j4vB`Gr]
public class HeapSort implements SortUtil.Sort{ S)Mby
.b~OMTHuvM
/* (non-Javadoc) *h])mqhB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?o>6S EGW
*/ T>5wQYh$'
public void sort(int[] data) { JU2P%3
MaxHeap h=new MaxHeap(); @?M;'xMbB
h.init(data); 40+fGRyOL
for(int i=0;i h.remove(); 2%]t3\XW
System.arraycopy(h.queue,1,data,0,data.length); un&>
} 2<m Q,,j
'tSnH&c
private static class MaxHeap{ cf&C|U
<G}m#
void init(int[] data){ 7YD\ !2b
this.queue=new int[data.length+1]; C=s((q*
for(int i=0;i queue[++size]=data; $~ VcQ
fixUp(size); 8E=vR 8
} `W="g6(
} oE5;|x3
}Fz!6F2w
private int size=0; vcV!K^M-
30BR0C
private int[] queue; <L%HG
lXw;|dGF
public int get() { vhX-Qkt}
return queue[1]; 1"d\mE
} C?(y2p`d\
xpz`))w
public void remove() { qs "s/$
SortUtil.swap(queue,1,size--); 6T]Q.\5BZ
fixDown(1); rr>IKyI'
} nDF&EE
file://fixdown $'y1Po'2
private void fixDown(int k) { ID+,[TM`
int j; W=F3XYS
while ((j = k << 1) <= size) { -$b?rt]h1g
if (j < size %26amp;%26amp; queue[j] j++; eA10xpM0
if (queue[k]>queue[j]) file://不用交换 03] r*\
break; x6jm-n
SortUtil.swap(queue,j,k); 35}P0+
k = j; 6\XP|n-0+0
} WEps.]s
} }il%AAI9}r
private void fixUp(int k) { tRkrV]K
while (k > 1) { zK,~37)\
int j = k >> 1; "wF*O"WQo
if (queue[j]>queue[k]) Ag<4r
break; c.\:peDk
SortUtil.swap(queue,j,k); svF*@(-P#
k = j; [KD}U-(Wg
} M Ey1~h/
} @H3|u`6V
s~/57S
} ]m RF[b$
Fu#Y7)r
} &8zk3
q~mcjbLz
SortUtil： ^sJ1 ^LT
2k%Bl+I
package org.rut.util.algorithm; +7`u9j.
W;5N04ko
import org.rut.util.algorithm.support.BubbleSort; TjT](?'o
import org.rut.util.algorithm.support.HeapSort; I8:"h
import org.rut.util.algorithm.support.ImprovedMergeSort; "[Yip5
import org.rut.util.algorithm.support.ImprovedQuickSort; 1o(+rR<h9
import org.rut.util.algorithm.support.InsertSort; ,I("x2
import org.rut.util.algorithm.support.MergeSort; bL+sN"Km
import org.rut.util.algorithm.support.QuickSort; }1l}-w`F
import org.rut.util.algorithm.support.SelectionSort; #3YdjU3w
import org.rut.util.algorithm.support.ShellSort; w"yK\OE
NT'Ie]|
/** O^y$8OKEi,
* @author treeroot 0qOM78rE
* @since 2006-2-2 b$IY2W<Ln
* @version 1.0 UnJi& ~O
*/ -v;iMEZ)
public class SortUtil { //VG1@vaVX
public final static int INSERT = 1; #@IQlqJfY7
public final static int BUBBLE = 2; n(9F:N
public final static int SELECTION = 3; Lqg7D\7j
public final static int SHELL = 4; w6%l8+{R
public final static int QUICK = 5; !d/`[9jY
public final static int IMPROVED_QUICK = 6; <Wp`[S]r
public final static int MERGE = 7; 9Y;}JVS
public final static int IMPROVED_MERGE = 8; <?{ SU
public final static int HEAP = 9; ~_(!}V
q=T<^Tk#e
public static void sort(int[] data) { GE{8I<7c
sort(data, IMPROVED_QUICK); % E<FB;h
} 3L%Y"4(mm
private static String[] name={ D "JMSL4r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;]|m((15G
}; BASO$?jf4
+SP!R[a
private static Sort[] impl=new Sort[]{ rjfc.l#v
new InsertSort(), 3 t~X:
new BubbleSort(), O<gP)ZW~
new SelectionSort(), FA5k45wL
new ShellSort(), T9aTEsA[U
new QuickSort(), '&rw=.cU
new ImprovedQuickSort(), {9y9Kr|(P:
new MergeSort(), NHst7$Y<
new ImprovedMergeSort(), >?H_A
new HeapSort() :0i#=ODR
}; wI|bBfd(
jJiCF,m
public static String toString(int algorithm){ Rt*-#`I $
return name[algorithm-1]; eW<!^Aer
} E;ndw/GZjR
(\5<GCW-
public static void sort(int[] data, int algorithm) { Lx|w~+k}
impl[algorithm-1].sort(data); JI28}Cxs0
} {'cs![U
ZYpD8u6U
public static interface Sort { h+\$Z]
public void sort(int[] data); Ke'YM{
} EfMG(oI
H{p[Ghp
public static void swap(int[] data, int i, int j) { +z{x 7
int temp = data; ',v0vyO8
data = data[j]; h9@gs,'
data[j] = temp; p8E;[
} kW*W4{Fth
} 3?-V>-[G_