[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; p-r[M5;-^Q
} MdN0 Y@Ll
int i1=l; FGzKx9I9
int i2=mid+1; 2;(+]Ad<
for(int cur=l;cur<=r;cur++){ w+wtr[;wwL
if(i1==mid+1) d<6m_!L
data[cur]=temp[i2++]; CXi[$nF3
else if(i2>r) md,KRE
data[cur]=temp[i1++]; A$i^/hJs
else if(temp[i1] data[cur]=temp[i1++]; q[GDK^-g
else lQd7p+21
data[cur]=temp[i2++]; T.jCF~%7F
} d8iq9AP\o
} 6bPl(.(3
0U~*uDU
} Mi;Pv*
o{hX?,4i
改进后的归并排序: B$n1k45
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package org.rut.util.algorithm.support; }'*6 A
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import org.rut.util.algorithm.SortUtil; :yRv:`r3Lt
yO}5.
/** lu8*+.V
* @author treeroot 3=yfbO<-
* @since 2006-2-2 ITg<u?z_
* @version 1.0 ~GcWG4
*/ ?(n v_O
public class ImprovedMergeSort implements SortUtil.Sort { Xdwpn+7s
,ga6
private static final int THRESHOLD = 10; )_1 GPS
2WTOu x*
/* s_a jA
* (non-Javadoc) \EsT1aT
* ~>HzAo9e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6oKdw|(Q#
*/ 'uE;8.,
public void sort(int[] data) { .T)wG;+
int[] temp=new int[data.length]; TkJ[N4'0
mergeSort(data,temp,0,data.length-1); #f<v%
} aHVzBcCPh
>,E^ R`y
private void mergeSort(int[] data, int[] temp, int l, int r) { Nk<^ Qv
int i, j, k; 4"_`Mu_%
int mid = (l + r) / 2; aZ+><1TD
if (l == r) 9?8PMh.
return; b+|3nc!
if ((mid - l) >= THRESHOLD) 2:_6nWl
mergeSort(data, temp, l, mid); =#v? }JG
else *yaS^k\
insertSort(data, l, mid - l + 1); 0y6M;"&~E
if ((r - mid) > THRESHOLD) &!OEd]
mergeSort(data, temp, mid + 1, r); dFF=-_O>
else ,2^4"gIl
insertSort(data, mid + 1, r - mid); &w#!
c!_c, vwrn
for (i = l; i <= mid; i++) { ?C#E_
temp = data; ~MBPN4r
} b>Y{,`E3
for (j = 1; j <= r - mid; j++) { R(`:~@3\6
temp[r - j + 1] = data[j + mid]; !?(7g2NP)
} tAF?.\x"g
int a = temp[l]; #{PwEX !Ct
int b = temp[r]; ,zltNbu\.(
for (i = l, j = r, k = l; k <= r; k++) { ! 5NuFLOf
if (a < b) { 8AX_y3$
data[k] = temp[i++]; <^'{=A>
a = temp; o6d x\
} else { t*=[RS*
data[k] = temp[j--]; ATl?./Tu
b = temp[j]; _$ivN!k
} xH xTL>,?
} ~Ix2O
} 'gvR?[!t
X!p`|i
/** G$>QH-p
* @param data XTo7fbW*
* @param l |Ha#2pt{bc
* @param i USEb} M`
*/ j/z=<jA
private void insertSort(int[] data, int start, int len) { >m>F {v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 68Gywk3]=u
} _ i}W1i
} l2qvYNMw
} N,c!1:b
} D2?H"PH
)63 $,y-;$
堆排序： dPwyiV0
L%T(H<G
package org.rut.util.algorithm.support; {d'-1z"q
pA~}_
import org.rut.util.algorithm.SortUtil; lPZ(c%P
4|=>gdW)KN
/** UX@%1W!8
* @author treeroot Lwr's'ao.
* @since 2006-2-2 ~v+kO~
* @version 1.0 u]P|
*/ Uj):}xgi'
public class HeapSort implements SortUtil.Sort{ `m7<_#Y
"`$,qvNN
/* (non-Javadoc) mb1mlsE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D%p*G5Bg3
*/ C9!t&<\}
public void sort(int[] data) { bDkZU
MaxHeap h=new MaxHeap(); iT>u&0B-
h.init(data); Aqmpo3P[+
for(int i=0;i h.remove(); hMa;\k
System.arraycopy(h.queue,1,data,0,data.length); Y~WdN<g
} %_ibe
jYHnJ}<
private static class MaxHeap{ *nCA6i
QB*,+u4
void init(int[] data){ H<(F$7Q!\
this.queue=new int[data.length+1]; 68Fl/
for(int i=0;i queue[++size]=data; j uA@"SG
fixUp(size); \c< oVF'
} fF(2bVKP:
} ; oyV8P$
eDJnzh83
private int size=0; eV[{c %wN:
"mK`3</G
private int[] queue; N1a]y/
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public int get() { c*;oR$VW
return queue[1]; m,k0 h%
} D&G6^ME
E^1yU
public void remove() { }QFL
SortUtil.swap(queue,1,size--); YThVG0I =
fixDown(1); W,xdj!^t
} sbW+vc
file://fixdown !8H0.u rw
private void fixDown(int k) { 1dQAo1
int j; r&{8/ 5"
while ((j = k << 1) <= size) { nTeA=0 4
if (j < size %26amp;%26amp; queue[j] j++; @dWA1tM
if (queue[k]>queue[j]) file://不用交换 l<v{8:,e#
break; JQV%W+-@
SortUtil.swap(queue,j,k); \'m7un
k = j; iWs6 !s!
} ;6G]~}>o
} O[ma% E*0
private void fixUp(int k) { v$y\X3)mB
while (k > 1) { kE&R;T`Gb%
int j = k >> 1; ZISIW!
if (queue[j]>queue[k]) uY]';OtG
break; 7=P)`@
SortUtil.swap(queue,j,k); 9q`Ewj R
k = j; [vi =^
} '12m4quO
} qs]W2{-4~
y\FQt];z)
} :'[?/<iTg
,U{dqw8E{
} +^AdD8U
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SortUtil： /TMVPnvz.
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package org.rut.util.algorithm; q[U pP`Z%
vMzL+D2)
import org.rut.util.algorithm.support.BubbleSort; )G2Bx+Z;L
import org.rut.util.algorithm.support.HeapSort; $DDO9
import org.rut.util.algorithm.support.ImprovedMergeSort; 8-;.Ejz!\A
import org.rut.util.algorithm.support.ImprovedQuickSort; ,RPb<3 B
import org.rut.util.algorithm.support.InsertSort; f#s6 'g
import org.rut.util.algorithm.support.MergeSort; rEa(1(I
import org.rut.util.algorithm.support.QuickSort; QbJ7$,4
import org.rut.util.algorithm.support.SelectionSort; f7&ni#^Ztj
import org.rut.util.algorithm.support.ShellSort; GgpE"M?
fzJiW@-T
/** @/#G2<Vp1
* @author treeroot awzlLI<2p
* @since 2006-2-2 *d8 %FQ
* @version 1.0 C. .|O
*/ ozOc6
public class SortUtil { `{#""I^_
public final static int INSERT = 1; CEj_{uf|
public final static int BUBBLE = 2; Te+#
public final static int SELECTION = 3; K3zY-yIco
public final static int SHELL = 4; a!o%x
public final static int QUICK = 5; \n}%RD-Ce
public final static int IMPROVED_QUICK = 6; ,LBj$U]e|E
public final static int MERGE = 7; 9O- otAGM
public final static int IMPROVED_MERGE = 8; 8$uq60JK
public final static int HEAP = 9; C^$E#|E9N
)v(rEY
public static void sort(int[] data) { "-:H$
sort(data, IMPROVED_QUICK); ,zjz "7'
} Y~Uf2(7b5
private static String[] name={ / B!j`UK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \4 b^*`d
}; 9"[,9HN
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private static Sort[] impl=new Sort[]{ YMo8C(
new InsertSort(), `@y~JNf!
new BubbleSort(), Ktk?(49
new SelectionSort(), gPn0-)<
new ShellSort(), +=W(c8~P
new QuickSort(), BiU>h.4=\(
new ImprovedQuickSort(), _#~D{91 j:
new MergeSort(), H7uh"/A
new ImprovedMergeSort(), l9QIlTc7
new HeapSort() OsOfo({I_
}; +wj}x?ZeV
fhg'4FO
public static String toString(int algorithm){ B/16EuH#
return name[algorithm-1]; EwBrOq`C
} F*G]Na@6D
m2m ;|rr
public static void sort(int[] data, int algorithm) { RSAGSGp
impl[algorithm-1].sort(data); b\\lEM>o1
} /\,3AInLb
7jw+o*;
public static interface Sort { uBG!R#T
public void sort(int[] data); mBL?2~M
} g8/ ,E-u
}>iNT.Lvd
public static void swap(int[] data, int i, int j) { e=##X}4zZ
int temp = data; iklZ[G%A0
data = data[j]; q"269W:
data[j] = temp; |zRrGQYm
} BuvnY
} ~"*W;|)