[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'2K7\>E
} xx!o]D-}
int i1=l; {< jLfL1
int i2=mid+1; e)!X9><J
for(int cur=l;cur<=r;cur++){ ]~3wq[O
if(i1==mid+1) zHDC8m
data[cur]=temp[i2++]; /A|ofAr)
else if(i2>r) "^22Y}VB
data[cur]=temp[i1++]; si3i#l&.b_
else if(temp[i1] data[cur]=temp[i1++]; qi7dcn@d
else @hl5^d"l
data[cur]=temp[i2++]; N<"_5
} c)iQ3_&=
} ,0lRs
sGMC$%e}
} "o;l8$)VL
X*$ 7g;
改进后的归并排序: 84)S0Y8w
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package org.rut.util.algorithm.support; OaU} 9&
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import org.rut.util.algorithm.SortUtil; ?kE2S6j5
*=^_K`y
/** 'qQDM_+
* @author treeroot !Aunwq^
* @since 2006-2-2 ?D57HCd`n
* @version 1.0 \m5:~,p=
*/ <C# s0UX
public class ImprovedMergeSort implements SortUtil.Sort { [RC|W%<Z>
I>L lc Y
private static final int THRESHOLD = 10; '~liDz*O
\ {"8(ELX
/* tQo"$ JN}
* (non-Javadoc) W=I%3F_C"R
* G\jr^d\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5XFhjVmEL
*/ EU>@k{Qt
public void sort(int[] data) { -_>c P
int[] temp=new int[data.length]; 8ru@ 8|r
mergeSort(data,temp,0,data.length-1); w>/KQ> \"
} >[ lj8n
,_\h)R_
private void mergeSort(int[] data, int[] temp, int l, int r) { <0v'IHlZ8
int i, j, k; .N/4+[2p(
int mid = (l + r) / 2; u+8_et5T
if (l == r) R;I}#b cJ
return; >tib21*
if ((mid - l) >= THRESHOLD) !l.Rv_o<O
mergeSort(data, temp, l, mid); sE>'~+1_O
else z_A%>E4
insertSort(data, l, mid - l + 1); WYEvW<Hv
if ((r - mid) > THRESHOLD) 3i35F.=X,
mergeSort(data, temp, mid + 1, r); ^]E| >~\
else /*rMveT
insertSort(data, mid + 1, r - mid); FCqs'
Pbm;@V
for (i = l; i <= mid; i++) { Wd~}O<"
temp = data; 9FPl
} Cv;z^8PZJz
for (j = 1; j <= r - mid; j++) { `n5RDz/f0
temp[r - j + 1] = data[j + mid]; z0g$+bhy
} bgYM
int a = temp[l]; ^Ud`2 OW;2
int b = temp[r]; tet
for (i = l, j = r, k = l; k <= r; k++) { "TN}=^A\F
if (a < b) { ,,fLK1
data[k] = temp[i++]; Rg0\Ng4|G
a = temp; 2S!=2u+7
} else { e|+uLbN&;c
data[k] = temp[j--]; HV>|f'45
b = temp[j]; K{q(/>:
} a`/[\K6
} "UVV/&`o
} V+Cb.$@
My)}oN7\z
/** IO v4Zx<)
* @param data p)TH^87
* @param l 'y'>0'et
* @param i Eptsxyz{
*/ Kq-y1h]7H
private void insertSort(int[] data, int start, int len) { aASnk2DFd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hrEKmRmF-
} v,g,c`BjK
} 3b%y+?-{\u
} W=F?+KgL
} I&1Mh4yu
i}+dctg/
堆排序： >OiC].1
?;^_%XSQ*
package org.rut.util.algorithm.support; Hej0l^
4:6@9.VVT
import org.rut.util.algorithm.SortUtil; {/R4Q1
NbkWy
/** EWH'x$z_q
* @author treeroot 7J$ ^R6rh
* @since 2006-2-2 3@6f%Dyj
* @version 1.0 @jwUH8g1
*/ E.6^~'/
public class HeapSort implements SortUtil.Sort{ { "$2
Kpj0IfC,10
/* (non-Javadoc) d*q_DV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y}#bCRy~.A
*/ D}b+#G(m[
public void sort(int[] data) { eN}FBX#'
MaxHeap h=new MaxHeap(); zZ;tSKL
h.init(data); G=~T)e
for(int i=0;i h.remove(); U%w-/!p
System.arraycopy(h.queue,1,data,0,data.length); wond>m 3
} ce+\D'q[
6pr}A
private static class MaxHeap{ OaU$ [Z'8
&?zJ|7rh@|
void init(int[] data){ @iWIgL
this.queue=new int[data.length+1]; Q#:,s8TW[
for(int i=0;i queue[++size]=data; To=1B`@-
fixUp(size); (`>4~?|+T
} oX?2fu-
} FA4bv9:hi
v,p/r)E
private int size=0; 9O}YtX2
,YH^jc
private int[] queue; p1X lni%=
Ev$?c9*>
public int get() { \Sm.]=br
return queue[1]; [lyB@) 6.
} <V>vDno\
tYmWze.j
public void remove() { [!bTko>rSB
SortUtil.swap(queue,1,size--); <niHJ*
fixDown(1); '%K,A-7W
} L & PhABZ
file://fixdown <([o4%
private void fixDown(int k) { u!{P{C
int j; nM}X1^PiK"
while ((j = k << 1) <= size) { #C!8a
if (j < size %26amp;%26amp; queue[j] j++; #kma)_X
if (queue[k]>queue[j]) file://不用交换 m"+9[d_u
break; O a-ZeCq
SortUtil.swap(queue,j,k); 9"MC<
k = j; E;-R<X5n
} ^dqyX(
} "d.qmM
private void fixUp(int k) { ! daXF&q
while (k > 1) { NGS/lKz
int j = k >> 1; %)q5hB
if (queue[j]>queue[k]) CE*@CkC0z
break; M^g"U`
SortUtil.swap(queue,j,k); %&z9^}Vd[
k = j; ,ci tzh
} ,)oUdwR k
} <=jE,6_|
fkk\Q>J9!=
} $!KV]]
zL)m!:_
} w_\niqm<y
Z8nNZ<k
SortUtil： LD^V="d
jQsucs5$h
package org.rut.util.algorithm; 4y)"IOd#|
oD!72W_:
import org.rut.util.algorithm.support.BubbleSort; N,Y<mX
import org.rut.util.algorithm.support.HeapSort; *K m%Vl
import org.rut.util.algorithm.support.ImprovedMergeSort; 6 D~b9e
import org.rut.util.algorithm.support.ImprovedQuickSort; *,pG4kh!
import org.rut.util.algorithm.support.InsertSort; 0XXu_f@]9
import org.rut.util.algorithm.support.MergeSort; YSv\T '3
import org.rut.util.algorithm.support.QuickSort; B6=8cf"i
import org.rut.util.algorithm.support.SelectionSort; C=9|K`g5 R
import org.rut.util.algorithm.support.ShellSort; Q[8L='E
n*bbmG1
/** KvktC|~?
* @author treeroot GH^i,88
* @since 2006-2-2 PTL52+}/
* @version 1.0 X3RpJ#m"'
*/ D!)'c(b
public class SortUtil { |!rD2T\Ef
public final static int INSERT = 1; H={fY:%
public final static int BUBBLE = 2; T#er5WOH
public final static int SELECTION = 3; lR;<6
public final static int SHELL = 4; 1 ht4LRFi
public final static int QUICK = 5; nm\n\j~
public final static int IMPROVED_QUICK = 6; xNq&_oY7
public final static int MERGE = 7; F/@#yQv?
public final static int IMPROVED_MERGE = 8; N:gS]OI*
public final static int HEAP = 9; d!w32Y,.
#i:p,5~")
public static void sort(int[] data) { uX`Jc:1q3
sort(data, IMPROVED_QUICK); Cw Z{&
} ;:"~utL7
private static String[] name={ ,:;nq>;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PO |p53
}; m}F1sRkdQ
@c7 On)sy
private static Sort[] impl=new Sort[]{ ##R]$-<4dQ
new InsertSort(), ^HC! my
new BubbleSort(), #M{}Grg
new SelectionSort(), ^$rt|]
new ShellSort(), V^?+|8_(
new QuickSort(), 183'1Z$KA
new ImprovedQuickSort(), p&XbXg-
new MergeSort(), %{o5}TqD
new ImprovedMergeSort(), I uhyBo
new HeapSort() iM}cd$r{
}; Vs9fAAXS4
y . AN0
public static String toString(int algorithm){ zjVb+Z\n
return name[algorithm-1]; q(a6@6f"kD
} YZ/mTQn_D
KX`MX5?x
public static void sort(int[] data, int algorithm) { 5/neV&VcB
impl[algorithm-1].sort(data); c5O1h8
} NIV&)`w
4my8 p Fk
public static interface Sort { FC vR
public void sort(int[] data); H(n_g QAX
} 7J0PO}N
s g6
public static void swap(int[] data, int i, int j) { S{fNeK
int temp = data; lc[\S4
data = data[j]; QN*'MA"M
data[j] = temp; tJ'U<s
} .@1\26<
} )c+ZQq