[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; !iBe/yb
} al<[iZ
int i1=l; 6KuB<od
int i2=mid+1; 4<b=;8
for(int cur=l;cur<=r;cur++){ ,2\?kPoc8
if(i1==mid+1) Te=[tx~x
data[cur]=temp[i2++]; e|)6zh<O:
else if(i2>r) f>\guuG
data[cur]=temp[i1++]; :=qblc
else if(temp[i1] data[cur]=temp[i1++]; $Fx:w
else :r%Hsur(
data[cur]=temp[i2++]; <smi<syx
} B]Vnu7
} ?}4 =A&][
*GxOiv7"4W
} [\(}dnj:
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改进后的归并排序: ^.5`jdk
8zv=@`4@G
package org.rut.util.algorithm.support; 'r;C(Gh6
}TjiYA.
import org.rut.util.algorithm.SortUtil; gFR9!=,/V%
>\=~2>FCD
/** 5g9lO]WDI
* @author treeroot 4FK|y&p4r
* @since 2006-2-2 oG5:]/F
* @version 1.0 q3a`Y)aVB
*/ tHlKo0S$0
public class ImprovedMergeSort implements SortUtil.Sort { 4 [2^#t[
R%)ZhG*
private static final int THRESHOLD = 10; 6[g~p< 8n}
XRi/O)98o
/* P70\ |M0~y
* (non-Javadoc) DA'A-C2
* VJ1(|v{D4[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l AF/O5b
*/ !Z+4FwF
public void sort(int[] data) { u2=gG.
int[] temp=new int[data.length]; m/W0vPM1
mergeSort(data,temp,0,data.length-1); |3\$\qa
} 5fpBzn$
^+Ho#]
private void mergeSort(int[] data, int[] temp, int l, int r) { t[Dg)adc
int i, j, k; ,VK! 3$;|
int mid = (l + r) / 2; 2,.%]U
if (l == r) '\yp}r'u
return; gY'w=(/`
if ((mid - l) >= THRESHOLD) VO"f=gFg
mergeSort(data, temp, l, mid); WR'm<u
else r?Y+TtF\e
insertSort(data, l, mid - l + 1); uYW9kw>$
if ((r - mid) > THRESHOLD) tEEeek(!
mergeSort(data, temp, mid + 1, r); #P:o
else iwb]mJUA
insertSort(data, mid + 1, r - mid); @.T w*t
b"x[+&%i
for (i = l; i <= mid; i++) { nNe`?TS?f
temp = data; B{IYVviiP
} 7gIK+1`
for (j = 1; j <= r - mid; j++) { jA ?tDAx`
temp[r - j + 1] = data[j + mid]; 2K/+6t}
} pyPS5vWG
int a = temp[l]; Of|e]GR
int b = temp[r]; .eQIU$Kw!O
for (i = l, j = r, k = l; k <= r; k++) { V&)lS Qw
if (a < b) { +QS7F`O
data[k] = temp[i++]; B-63IN
a = temp; &mebpEHUG7
} else { ppcuMcR{
data[k] = temp[j--]; [5&zyIi
b = temp[j]; Q8:`;W
} 1S!<D)n
} hR;J#w
} Mv9q-SIc[
]KX _a1e
/** <a>\.d9#)7
* @param data /rRQ*m_
* @param l b}P5*}$:9"
* @param i cp|&&q
*/ 5fGUJ[F=
private void insertSort(int[] data, int start, int len) { \VW&z:/*pZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .:eNL]2%:
} ]V9z)uz
} gemjLuf
} fneg[K
} :v/6k
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堆排序： (`0dO8
JM8s]&
package org.rut.util.algorithm.support; dt NHj/\
.f'iod-
import org.rut.util.algorithm.SortUtil; S30@|@fTz
/$OX'L&b
/** Kgi| 7w
* @author treeroot @ucN|r}=R
* @since 2006-2-2 bI^zwK,@4
* @version 1.0 F+e J9
*/ o!Vs{RRu}
public class HeapSort implements SortUtil.Sort{ yK"OZ2Mv
>-0b@ +j
/* (non-Javadoc) ypxqW8Xe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,z}wR::%
*/ o6e6Jw
public void sort(int[] data) { Q>gU(
MaxHeap h=new MaxHeap(); ;]<{<czc
h.init(data); B!jINOg
for(int i=0;i h.remove(); [ e4)"A"
System.arraycopy(h.queue,1,data,0,data.length); !x9j~D'C`
} 9g" 1WZ!
^'8T9N@U
private static class MaxHeap{ @Yua%n6]#D
HLMEB0zh^
void init(int[] data){ C7=Q!UK`\
this.queue=new int[data.length+1]; M4a-+T"
for(int i=0;i queue[++size]=data; ,j~R ^j
fixUp(size); b@J&jE~d
} tMaJ; 4
} 02]9OnWw
)=\W sQ
private int size=0; UXB[3SP
!=#230Y
private int[] queue; mfu>j,7l
g;(r@>U.r
public int get() { )2X ng_,
return queue[1]; X-di^%<
} ZyqTtA!A
0y4z`rzTn
public void remove() { }z&P^p)R
SortUtil.swap(queue,1,size--); Y[8w0ve-g
fixDown(1); @URLFMFi
} nbYkr*: "t
file://fixdown H3 _7a9
private void fixDown(int k) { *VT@
int j; }I7/FqrD
while ((j = k << 1) <= size) { ;??wLNdf-
if (j < size %26amp;%26amp; queue[j] j++; 6l#1E#]|
if (queue[k]>queue[j]) file://不用交换 fSp(}'m2L
break; 3mn0
SortUtil.swap(queue,j,k); JWG7QH
k = j; &?3?8Q\
} EmNB}\IYU
} +P6#7.p`Z
private void fixUp(int k) { R<mLG $
while (k > 1) { z;x`dOP
int j = k >> 1; amf=uysr
if (queue[j]>queue[k]) MBCA%3z08
break; mQ#@"9l%
SortUtil.swap(queue,j,k); =K2Dxu_:
k = j; uPe4Rr
} lh*m(
} =5&)^
\S;% "0!
} wxZnuCO%H8
|0w'+HaE~N
} G#'3bxI{f+
A"Rzn1/
SortUtil： !)tXN=(1a
=ox#qg.5
package org.rut.util.algorithm; ^ j@Q2>&?
Kq`Luf
import org.rut.util.algorithm.support.BubbleSort; |bDN~c:/
import org.rut.util.algorithm.support.HeapSort; ~%^af"_
import org.rut.util.algorithm.support.ImprovedMergeSort; UQ>GAzh
import org.rut.util.algorithm.support.ImprovedQuickSort; <W,k$|w
import org.rut.util.algorithm.support.InsertSort; w;Qo9=-
import org.rut.util.algorithm.support.MergeSort; L}AR{
import org.rut.util.algorithm.support.QuickSort; q9qmz[
import org.rut.util.algorithm.support.SelectionSort; k=Ef)'
import org.rut.util.algorithm.support.ShellSort; eEJ8j_G
`<t{NJ&f
/** 'O`jV0aa'
* @author treeroot ;:*o P(9k
* @since 2006-2-2 {549&]/o
* @version 1.0 "}K/ b
*/ h_]3L/
public class SortUtil { 6K P!o
public final static int INSERT = 1; 5S7`gN.
public final static int BUBBLE = 2; 17{]QuqNF
public final static int SELECTION = 3; ^g[\.Q
public final static int SHELL = 4; ^iubqtT]
public final static int QUICK = 5; %R;cXs4r
public final static int IMPROVED_QUICK = 6; ]T^m>v)X
public final static int MERGE = 7; GMU<$x8o
public final static int IMPROVED_MERGE = 8; *cp|lW!ag
public final static int HEAP = 9; #2DH_P
z/fRd6|[
public static void sort(int[] data) { @.*[CC;&
sort(data, IMPROVED_QUICK); ~<, \=;b/
} vFb{(gIJ
private static String[] name={ &7Ixf?e!K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `#fOY$#XB
}; _DC/`_'
g)$Pvfc
private static Sort[] impl=new Sort[]{ OJ UM Y<5
new InsertSort(), =&"Vf!7YR7
new BubbleSort(), D0i84I`Z%
new SelectionSort(), :G^`LyOM
new ShellSort(), ENC_#-1x
new QuickSort(), =(v!pEF
new ImprovedQuickSort(), F.A<e #e?
new MergeSort(), ^&&dO*0{
new ImprovedMergeSort(), g) v"nNS
new HeapSort() n{BC m %
}; ejo4mQ]a
ErESk"2t
public static String toString(int algorithm){ EFql g9bK
return name[algorithm-1]; ?xQlX%&`6
} d?N"NqaN
no?)GQ
public static void sort(int[] data, int algorithm) { pw>AQ
impl[algorithm-1].sort(data); zp4ru\
} ?%Y?z]L#
42p6l
public static interface Sort { ~n[LL)v
public void sort(int[] data); 7gVWu"
} A</[Q>8
%hrv~=
public static void swap(int[] data, int i, int j) { Qb|w\xT^Y
int temp = data; ?qO,=ms>-
data = data[j]; YfMe69/0I
data[j] = temp; hQL9 Zl~
} puqLXDjA/
} }#'KME4