[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; y+^KVEw
} Foj|1zJS_
int i1=l; *B4OvHi)'
int i2=mid+1; on hLhrZ
for(int cur=l;cur<=r;cur++){ ~Q^.7.-T
if(i1==mid+1) hH$9GL{H
data[cur]=temp[i2++]; >8>s K(S]
else if(i2>r) tHqa%
data[cur]=temp[i1++]; Jl\U~i
else if(temp[i1] data[cur]=temp[i1++]; 0f_`;{
else GS>YfJ&DZ
data[cur]=temp[i2++]; .5SYN-@
} "8)%XSb
} _TdH6[9
v"Bm4+c&0
} gr!!pp;
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改进后的归并排序: 0WZd$
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package org.rut.util.algorithm.support; (3K,f4S@
/^K-tz-R
import org.rut.util.algorithm.SortUtil; eF0FQlMe[
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/** AH#a+<;a
* @author treeroot 6e|uA7i4
* @since 2006-2-2 D1ik*mDA=
* @version 1.0 e~he#o[%a
*/ wKcuIc$
public class ImprovedMergeSort implements SortUtil.Sort { {Gh9(0,B?
CE (zt
private static final int THRESHOLD = 10; +u |SX/C
lP4s"8E`h
/* Rm_+kp@\
* (non-Javadoc) RHd no C
* 1LSD,t|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /ZL6gRRA|
*/ non5e)w3@
public void sort(int[] data) { !mVq+_7]
int[] temp=new int[data.length]; |A|K);
mergeSort(data,temp,0,data.length-1); )yz)Fw|&
} Bs '=YK$
5ld?N2<8/
private void mergeSort(int[] data, int[] temp, int l, int r) { wU/fGg*M2
int i, j, k; `S3)uV]I
int mid = (l + r) / 2; QXa2qxTc
if (l == r) zk@s#_3ct
return; =(R3-['QIb
if ((mid - l) >= THRESHOLD) i$.!8AV6
mergeSort(data, temp, l, mid); ]l=CiG4!M
else r0OP !u
insertSort(data, l, mid - l + 1); 4"nYxL"<4
if ((r - mid) > THRESHOLD) .|P :n'
mergeSort(data, temp, mid + 1, r); Gf!c
else I~HA ad,k
insertSort(data, mid + 1, r - mid); Yp3y%n
Te3 ?z
for (i = l; i <= mid; i++) { y(a>Y! dgU
temp = data; all2?neK
} 0XC3O 8q
for (j = 1; j <= r - mid; j++) { ,1t|QvO
temp[r - j + 1] = data[j + mid]; 2/F8kVx{
} '"hSX=
int a = temp[l]; ;i [;%
int b = temp[r]; IW}Wt{'m
for (i = l, j = r, k = l; k <= r; k++) { @eESKg(,
if (a < b) { jW^]N$>
data[k] = temp[i++]; .Y!dO@$:
a = temp; ]R^xO;g'
} else { 1;,<UHF8N
data[k] = temp[j--]; N3)n**
b = temp[j]; x*X{*?5@
} 8X? EB6=c
} ~XXNzz]?
} JCB3 BZg7&
_$vbb#QXZG
/** 4B[uF/[
* @param data #N"QTD|i
* @param l mYk~ ]a-
* @param i |~v2~
*/ ]XX>h~0
private void insertSort(int[] data, int start, int len) { {EVy.F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %n,_^voE
} DHvZ:)aT}
} C0^r]^$Z
} $EdL^Q2KAy
} fU.z_T[@
(_N(K`4#W
堆排序： U9\w)D|+eE
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package org.rut.util.algorithm.support; ]Ee$ulJ02
eT2Tg5Etc
import org.rut.util.algorithm.SortUtil; *k?y+}E_f
NE &{_i!
/** ~?iQnQYI
* @author treeroot o>]z~^c
* @since 2006-2-2 m*lcIa
* @version 1.0 M D&7k,!
*/ EACI>
public class HeapSort implements SortUtil.Sort{ F0kAQgUv
W]>%*n
/* (non-Javadoc) iJKGzHvS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UQP>yuSx
*/ fL-$wK<p<
public void sort(int[] data) { Vhe$vH
MaxHeap h=new MaxHeap(); u3Zu ~C
h.init(data); X<v1ES$
for(int i=0;i h.remove(); _1YC9}
System.arraycopy(h.queue,1,data,0,data.length); =?\%E[j
} `Hu2a]e9
:/"5x
private static class MaxHeap{ d+ [2Sm(7
ZC^NhgX
void init(int[] data){ PH^Gjm
this.queue=new int[data.length+1]; (bB"6 #TI
for(int i=0;i queue[++size]=data; e)XnS'
fixUp(size); 3m&
} }{&;\^i
} CHCT e
[;~"ctf{
private int size=0; nuA 0%K
F]0 qt$GO
private int[] queue; eq<!
.Ep&O#
public int get() { E},zB*5TH
return queue[1]; ]9W7]$
} 5e?<x>e
tCwB7c-
public void remove() { 7y.iXe!P
SortUtil.swap(queue,1,size--); ao|n<*}
fixDown(1); =u.23#.
} Nz;\PS
file://fixdown z"Cyjmg"
private void fixDown(int k) { O{U j
int j; `'pAiu
while ((j = k << 1) <= size) { @a 7U0$,O#
if (j < size %26amp;%26amp; queue[j] j++; Y|tK19
if (queue[k]>queue[j]) file://不用交换 #]gmM
break; AYp~;@
SortUtil.swap(queue,j,k); q_9 tbZ;
k = j; NQvI=R-g
} DhsvN&yNM
} )ac!@slb^7
private void fixUp(int k) { (I35i!F+tY
while (k > 1) { G68@(<<Z
int j = k >> 1; ;=6EBP%
if (queue[j]>queue[k]) q)AX*T+
break; 0y+i?y 9
SortUtil.swap(queue,j,k); 2n-kJl`: O
k = j; h[<l2fy
} GY^;$?
} } .<(L
Ji6.-[:
} Zp9kxm'
>6)|>#Wi
} lJT"aXt'M
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SortUtil： !?+q7U
IcGX~zWr
package org.rut.util.algorithm; E\p"%
=+q\Jh
import org.rut.util.algorithm.support.BubbleSort; j5]ul!ji
import org.rut.util.algorithm.support.HeapSort; Y4_xV&
import org.rut.util.algorithm.support.ImprovedMergeSort; qL[SwEc
import org.rut.util.algorithm.support.ImprovedQuickSort; Mq'm TM
import org.rut.util.algorithm.support.InsertSort; ,*?[Rg0]+
import org.rut.util.algorithm.support.MergeSort; ooC9a>X
import org.rut.util.algorithm.support.QuickSort; A(cR/$fn6
import org.rut.util.algorithm.support.SelectionSort; RAuVRm=E
import org.rut.util.algorithm.support.ShellSort; w8 `1'*HG
k_Y7<z0G
/** es=OWJt^
* @author treeroot Ki&a"Fu3
* @since 2006-2-2 YBF$/W+=9|
* @version 1.0 <$otBC/%
*/ Htln <N
public class SortUtil { )+w1nw|m
public final static int INSERT = 1; DVJn;X^T:
public final static int BUBBLE = 2; 1uB$@a\
public final static int SELECTION = 3; KDH<T4#x
public final static int SHELL = 4; :F@goiuC
public final static int QUICK = 5; PrA(==FX/
public final static int IMPROVED_QUICK = 6; g#cet{>
public final static int MERGE = 7; NSH4 @x
public final static int IMPROVED_MERGE = 8; Nd{U|k3pL
public final static int HEAP = 9; U=U5EdN;
5O Y5b8
public static void sort(int[] data) { IOY7w"|LW
sort(data, IMPROVED_QUICK); Uqy/~n-v<
} XD't)B(q
private static String[] name={ i" )_Xb_1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n=AcN
}; jIVDi~Ld
=;b3i1'U
private static Sort[] impl=new Sort[]{ 6]kBG?m0
new InsertSort(), k}NM]9EAE
new BubbleSort(), sf->8
new SelectionSort(), J_-fs#[x
new ShellSort(), CH;U_b
new QuickSort(), r\Kcg~D>
new ImprovedQuickSort(), !\9^|Ef?
new MergeSort(), *f`P7q*
new ImprovedMergeSort(), kfT*G +l]
new HeapSort() F"O\uo:3
}; 5b*knN>
evYn}
public static String toString(int algorithm){ =WBfaxL}
return name[algorithm-1]; n+te5_F
} ~1[n@{*:(
8&| o
public static void sort(int[] data, int algorithm) { js@L%1r#L
impl[algorithm-1].sort(data); \IImxkE
} .kn2M&P>=
T<?kH
public static interface Sort { f5FEHyj|
public void sort(int[] data); nPqpat`E
} Fb=uN
<r$h =hM
public static void swap(int[] data, int i, int j) { %A=/(%T>
int temp = data; 6=;(~k&x9:
data = data[j]; $sE=[j'v
data[j] = temp; H"6x/&s.=k
} >7%T%2N
} G8klWZAJ