[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; X"{%,]sb G
} :'p)xw4K|
int i1=l; M/<ypJ
int i2=mid+1; 81Kf X {|
for(int cur=l;cur<=r;cur++){ dtR"5TL<~}
if(i1==mid+1) ['mpxtG
data[cur]=temp[i2++]; k)b{UFRW
else if(i2>r) 7h 54j
data[cur]=temp[i1++]; W[&nQW$E
else if(temp[i1] data[cur]=temp[i1++]; <&E}db
else =2p?_.|'
data[cur]=temp[i2++]; (kxS0 ]=
} o,rF15
} KR?;7*qF
!PA:#]J
} 6F(z6_<
0>|q[SC
改进后的归并排序: ^EUR#~b5iy
/!H24[tnk1
package org.rut.util.algorithm.support; rbd0`J9fq
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import org.rut.util.algorithm.SortUtil; 'NtI bS
`jE[Xt"@
/** .Pm5nS
* @author treeroot UXct+l
* @since 2006-2-2 .\XRkr'-
* @version 1.0 ]K(a32VCH
*/ ,j%\3g`
public class ImprovedMergeSort implements SortUtil.Sort { QEJu.o
oZ%uq78#[%
private static final int THRESHOLD = 10; &hWELZe0vv
b-&rMML
/* iE'_x$i
* (non-Javadoc) lju5+0BSb
* 2y!n c%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CF;Gy L1M
*/ r)t[QoD1
public void sort(int[] data) { wiN0|h>,
int[] temp=new int[data.length]; >j?5?J"
mergeSort(data,temp,0,data.length-1); ;dzy5o3
} !BoGSI
1`8s "T
private void mergeSort(int[] data, int[] temp, int l, int r) { I1]YT
int i, j, k; d4b! r
int mid = (l + r) / 2; 7\UHADr
if (l == r) $>/d)o
return; H(^Ehv>
if ((mid - l) >= THRESHOLD) _`?0w#>0
mergeSort(data, temp, l, mid); :qo[@x{
else tiZH;t';<
insertSort(data, l, mid - l + 1); 'Dfs&sm
if ((r - mid) > THRESHOLD) p\[!=ZXFr\
mergeSort(data, temp, mid + 1, r); 5HbHJ.|r
else &y_t,8>5
insertSort(data, mid + 1, r - mid); }U7IMONU
b~.$1oZ
for (i = l; i <= mid; i++) { )9Q+07
temp = data; ,kJ'_mq
} ,l&?%H9q
for (j = 1; j <= r - mid; j++) { =CQfs6np:N
temp[r - j + 1] = data[j + mid]; VD.TosVeWo
} MXSD8]je
int a = temp[l]; g(&cq
int b = temp[r]; H>+/k-n-
for (i = l, j = r, k = l; k <= r; k++) { 8#QT[H 4F
if (a < b) { sV"tN2W@
data[k] = temp[i++]; %wbdg&^
a = temp; u(Mbp$R'?
} else { ,ojJ;w5D
data[k] = temp[j--]; ]G["TX,
b = temp[j]; 5RLO}Vn]
} Szzj9K
} ;<i u*a
} 1sXCu|\q
"==c
/** "W5MZ
* @param data hE:~~ox
* @param l O<vBuD2
* @param i 9':Ipf&x
*/ z_'^=9m
private void insertSort(int[] data, int start, int len) { H r:*p6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;W{z"L;nX
} 5j`sJvq
} 8$-MUF,
} 6Jgl"Jw8
} j"jssbu}
s~,!E
堆排序： s$(%]~P
S\Z*7j3;M
package org.rut.util.algorithm.support; S[L@8z.Sj
4<s;xSCL
import org.rut.util.algorithm.SortUtil; \gP?uJ
,.Ofv):=
/** E]q>ggeNH
* @author treeroot Ls2OnL9
* @since 2006-2-2 7O)ATb#up
* @version 1.0 }6l:'nW
*/ Z*Ffdh>*:&
public class HeapSort implements SortUtil.Sort{ :+YHj)mN
TD\TVK3P
/* (non-Javadoc) g(P7CX+y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /,I?"&FWc
*/ u4lM>(3Y}
public void sort(int[] data) { ^fKKsfIf
MaxHeap h=new MaxHeap(); UW":&`i
h.init(data); H'S~GP4D
for(int i=0;i h.remove(); m&AbH&;
System.arraycopy(h.queue,1,data,0,data.length); ok--Jyhv#
} -F`gRAr-
bN?*p($/
private static class MaxHeap{ L@MCB-@V
lsV>sW4]Z
void init(int[] data){ Gh_5$@ hF
this.queue=new int[data.length+1]; t_^cqEr
for(int i=0;i queue[++size]=data; '0f!o&?g
fixUp(size); J|xXo
} 7_Vd%<:
} 0of:tZU
23LG)or.JC
private int size=0; K;/f?3q
BSS4}qyS
private int[] queue; 0uKm)t/
a/E(GQ,,
public int get() { CV|Ae [
return queue[1]; ~a=]w#-KD
} AYNz {9
<!dZ=9^^1
public void remove() { OY"BaSEOw}
SortUtil.swap(queue,1,size--); q|YnNk>1
fixDown(1); Wr Wz+5M8
} R]od/u/$
file://fixdown v2|zIZ
private void fixDown(int k) { v*excl~
int j; KXTk.\c
while ((j = k << 1) <= size) { L^^f.w#m
if (j < size %26amp;%26amp; queue[j] j++; CEk[&39"
if (queue[k]>queue[j]) file://不用交换 Iv7BIK^0
break; V13^SVM
SortUtil.swap(queue,j,k); ~i-n_7+
k = j; 0Wd5s{S
} \sGJs8#v][
} %.[AZ>
private void fixUp(int k) { \ bNDeA&l
while (k > 1) { zV$Z@o
int j = k >> 1; @ &c@
if (queue[j]>queue[k]) !/2kJOSp
break; (N}\Wft%
SortUtil.swap(queue,j,k); 2P57C;N8|
k = j; 7TX$
} Q-_;.xy#4
} a&)$s;
!G;BYr>X
} Jv2V@6a(
%Y`)ZKh
} ADP[KZO$4
ke*&*mx"L
SortUtil： ygm=q^bV]s
-}qay@cDt
package org.rut.util.algorithm; '&/Y}]
8QFRX'i
import org.rut.util.algorithm.support.BubbleSort; Rv*x'w ==
import org.rut.util.algorithm.support.HeapSort; #!z'R20PH
import org.rut.util.algorithm.support.ImprovedMergeSort; \XY2s&"
import org.rut.util.algorithm.support.ImprovedQuickSort; "gpfD-BX
import org.rut.util.algorithm.support.InsertSort; N*w{NB7L
import org.rut.util.algorithm.support.MergeSort; A}!D&s&UH
import org.rut.util.algorithm.support.QuickSort; i/N68
import org.rut.util.algorithm.support.SelectionSort; H_JT"~_2
import org.rut.util.algorithm.support.ShellSort; }LBrk0]
UL8"{-`_\
/** ue *mTMN
* @author treeroot pv|D{39Hs
* @since 2006-2-2 0/+TQD!L
* @version 1.0 /4BYH?*
*/ %'F[(VB
public class SortUtil { Se/]J<]
public final static int INSERT = 1; !Je!;mEvI
public final static int BUBBLE = 2; q[Y*.%~
public final static int SELECTION = 3; YWhS<}^
public final static int SHELL = 4; bir tA{q
public final static int QUICK = 5; )Z?\9'6e4
public final static int IMPROVED_QUICK = 6; imS&N.*3m
public final static int MERGE = 7; MM+nE_9lV
public final static int IMPROVED_MERGE = 8; [Az^i>iH
public final static int HEAP = 9; nRZ T~S4
b|Ed@C
public static void sort(int[] data) { p t{/|P
sort(data, IMPROVED_QUICK); 5geZ6]|
} q|;+Wp?
private static String[] name={ \4q1<j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e3&.RrA
}; C"}]PW
/Bnh%6#ab
private static Sort[] impl=new Sort[]{ IW|1)8d
new InsertSort(), yw?UA
new BubbleSort(), nG5:H.)
new SelectionSort(), ]\R%@FCYc
new ShellSort(), 9%Ftln6
new QuickSort(), rFv=j:8
new ImprovedQuickSort(), NE$=R"<Gv
new MergeSort(), 7^8<[8
new ImprovedMergeSort(), -,xsUw4
new HeapSort() My>{;n=}
}; r+l3J>:K
q(@hYp#O"3
public static String toString(int algorithm){ i3y>@$fRL\
return name[algorithm-1]; 'v3>"b
} ZYW=#df R
c/}bx52>u
public static void sort(int[] data, int algorithm) { *}i.,4+y
impl[algorithm-1].sort(data); F_%&,"$
} XAr YmO
r`'n3#O*
public static interface Sort { [[:wSAO>6'
public void sort(int[] data); b_0Xi
} I%G6V a@
FZtIC77X5
public static void swap(int[] data, int i, int j) { \.dvRI'
int temp = data; ~); 7D'[
data = data[j]; yX8$LOjE
data[j] = temp; 5SY(:!
} VJ(#FA2
} w+owx(mN@