[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; Km8btS]n
} Zn1+} Z@I
int i1=l; " _jIqj6C
int i2=mid+1; *;Dd:D9
for(int cur=l;cur<=r;cur++){ dI5Z*"`R9
if(i1==mid+1) A@j;H|
data[cur]=temp[i2++]; 1}tZ,w>
else if(i2>r) l2+qP{_4
data[cur]=temp[i1++]; sDK lbb
else if(temp[i1] data[cur]=temp[i1++]; mwZesSxB_
else Jn +[:s.
data[cur]=temp[i2++]; ElZ'/l*\
} gq*- v:P>
} m}T^rX%m_
OwwH 45
} Oq(_I b)9
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改进后的归并排序: K0@2>nR
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package org.rut.util.algorithm.support; 8U/q3@EC
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import org.rut.util.algorithm.SortUtil; H?sl_3-#
im>Sxu@
/** miCt)Qd
* @author treeroot FviLlly6
* @since 2006-2-2 ({yuwH?tH
* @version 1.0 4-eb&
*/ :&mYz(1q
public class ImprovedMergeSort implements SortUtil.Sort { j?i Ur2
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private static final int THRESHOLD = 10; W'E!5T^
.6!IO^`[
/* /u<lh. hPW
* (non-Javadoc) }Y(Q7l
* hqnJ@N$yY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cfyas'
*/ k~>9,=::d
public void sort(int[] data) { f~jx2?W
int[] temp=new int[data.length]; +uM1#-+h
mergeSort(data,temp,0,data.length-1); KZ6}),p
} Fm3-Sn|Po
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private void mergeSort(int[] data, int[] temp, int l, int r) { KunK.m
int i, j, k; {p|OKf
int mid = (l + r) / 2; gd_w;{WP
if (l == r) 2xZg, \
return; Y:^~KS=Uz
if ((mid - l) >= THRESHOLD) 7$z")JB
mergeSort(data, temp, l, mid); ibl^A=
else HPCzh
insertSort(data, l, mid - l + 1); }zj w\
if ((r - mid) > THRESHOLD) #-'=)l}i1A
mergeSort(data, temp, mid + 1, r); doBfpQ2
else f?dNTfQ3mi
insertSort(data, mid + 1, r - mid); Fla[YWS
8d-; ;V
for (i = l; i <= mid; i++) { Y6`9:97
temp = data; PkLRQ}
} j$Vv'on
for (j = 1; j <= r - mid; j++) { .lb2`!'r&
temp[r - j + 1] = data[j + mid]; Oe'Nn250
} oZ& ns!#
int a = temp[l]; YUF!Y9!
int b = temp[r]; UQ$dO2^
for (i = l, j = r, k = l; k <= r; k++) { Q#}} 1}Ja
if (a < b) { H#E
data[k] = temp[i++]; _R1UEE3M
a = temp; 5dMIv<#T`
} else { k1L GT&
data[k] = temp[j--]; s+[_5n~
b = temp[j]; x]euNa
} KA`1IW;
} 1HN_
} 6NO=NL
*-ZD-B*?
/** 37ll8
* @param data B+jT|Y'
* @param l E,xCfS)
* @param i G 8uX[-L1
*/ tW|B\p}
private void insertSort(int[] data, int start, int len) { ;G0~f9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7V4iPx
} N ]}Re$5
} J6hWcA6g
} b/"gkFe#
} vn .wM
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堆排序： `.MM|6
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package org.rut.util.algorithm.support; .W,<]L '
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import org.rut.util.algorithm.SortUtil; CLQ\Is^]
\&R}JK
/** *gMuo6
* @author treeroot *7ap[YXZ\w
* @since 2006-2-2 Wxjk}&+pVa
* @version 1.0 2a5yJeaIv*
*/ >/6v` 8F
public class HeapSort implements SortUtil.Sort{ ~SV;"e2N.
O_-.@uo./(
/* (non-Javadoc) xO/44D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VEpIAC4
*/ a+A/l
public void sort(int[] data) { bkmX@+Pe
MaxHeap h=new MaxHeap(); ksu:RJ-
h.init(data); 5Lum$C c}
for(int i=0;i h.remove(); ClaYy58v
System.arraycopy(h.queue,1,data,0,data.length); K._1sOw'"Y
} Z6K9E=%)c
2J9eeN
private static class MaxHeap{ )lB-D;3[_
U=Z@Ipu5T
void init(int[] data){ A"vI6ud>
this.queue=new int[data.length+1]; "N4c>2Q
for(int i=0;i queue[++size]=data; fN0D\Mu!)b
fixUp(size); z]Ql/AK
} [<wy@W
} $N,9e
8'^eH1d'
private int size=0; @{+*ea7M(`
t,k9:p
private int[] queue; +=\S"e[F
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public int get() { oS_'@u.5
return queue[1]; CdWGb[uI
} %{zM> le9
J)'6 z
public void remove() { 7T4rx53
SortUtil.swap(queue,1,size--); .?AtW:<*I
fixDown(1); SB$~Btr
} pC5-,Z;8
file://fixdown Kz$Ijj
private void fixDown(int k) { \sp7[}Sw
int j; (O?z6g
while ((j = k << 1) <= size) { gMHH3^\VH)
if (j < size %26amp;%26amp; queue[j] j++; QXXcJc~
if (queue[k]>queue[j]) file://不用交换 7yQ r
break; y)s/\l&
SortUtil.swap(queue,j,k); Ls|;gewp
k = j; Xk7zXah
} Aqp3amW!
} xl# j_d,
private void fixUp(int k) { =1\'xz}p?
while (k > 1) { egr@:5QwZ{
int j = k >> 1; !u7WCw.Dm
if (queue[j]>queue[k]) ~x4Y57
break; HF47Lc*c
SortUtil.swap(queue,j,k); T}u'
k = j; Or_9KX2
} Nk=M
} i"_f46rP
\7og&j-h
} WZFV8'
&TK%igL
} sjaG%f&h
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SortUtil： !w C4ei`
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package org.rut.util.algorithm; dFFB\|e;0
8|J%IE
import org.rut.util.algorithm.support.BubbleSort; .(`u'G=
import org.rut.util.algorithm.support.HeapSort; >!a*wf~]
import org.rut.util.algorithm.support.ImprovedMergeSort; wHIS}OONz
import org.rut.util.algorithm.support.ImprovedQuickSort; > }:6m
import org.rut.util.algorithm.support.InsertSort; ]+@b=J2b
import org.rut.util.algorithm.support.MergeSort; =x[`W9.D
import org.rut.util.algorithm.support.QuickSort; nY~CAo/:
import org.rut.util.algorithm.support.SelectionSort; PDGh\Y[AK,
import org.rut.util.algorithm.support.ShellSort; =)y=M!T2
Zu+Z7@$}/
/** .@[+05Yw
* @author treeroot h|jsi*4NnL
* @since 2006-2-2 xvrCm`3n@
* @version 1.0 ?;i6eg17<
*/ | @mZ]`p
public class SortUtil { xQ$*K]VP
public final static int INSERT = 1; 'X[3y^q
public final static int BUBBLE = 2; E%40u.0
public final static int SELECTION = 3; Yoaz|7LS
public final static int SHELL = 4; z{tyB
public final static int QUICK = 5; Z7%>O:@z
public final static int IMPROVED_QUICK = 6; fQe-v_K
public final static int MERGE = 7; ]54V9l:
public final static int IMPROVED_MERGE = 8; A\ LTAp(I
public final static int HEAP = 9; "lUw{3
K_}vmB\2l
public static void sort(int[] data) { <0lfkeD
sort(data, IMPROVED_QUICK); uK t>6DN.
} ?)JW}3<.
private static String[] name={ rJg!2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;AHa|35\
}; Uu3[Cf=C
BWQ (>Z"
private static Sort[] impl=new Sort[]{ X,gXgxP\
new InsertSort(), h05 ~ g
new BubbleSort(), U?@UIhtM|
new SelectionSort(), .|_+>){$w
new ShellSort(), 9ft7
new QuickSort(), bBg?x 4bu
new ImprovedQuickSort(), &)`A4bf%
new MergeSort(), XhTp'2,]
new ImprovedMergeSort(), Ag}>gbz~G
new HeapSort() 44b'40
}; KcY 2lTvx
N/^r9Nu
public static String toString(int algorithm){ <5q:mG88
return name[algorithm-1]; 8R-?x/:
} fr:RiOPn
R$cg\DD
public static void sort(int[] data, int algorithm) { q/&Z6LJ)
impl[algorithm-1].sort(data); x'n J_0
} 0M:.Jhp
_DH,$evS%
public static interface Sort { >\KBXS}
public void sort(int[] data); a0y;c@pkO
} hOw7"'# !
Rl$NiY?2
public static void swap(int[] data, int i, int j) { +D$\^ <#
int temp = data; |'1[\<MM3
data = data[j]; Gu&zplB
data[j] = temp; 0*,r
} OTalR;:]r
} .Ml}cE$L