[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; K^s!0[6
} C x$|7J=O
int i1=l; UiaY0 .D
int i2=mid+1; zOWbdd_zl
for(int cur=l;cur<=r;cur++){ f}eZX
if(i1==mid+1) :m^eNS6:
data[cur]=temp[i2++]; N;<<-`i
else if(i2>r) im4V6 f;%
data[cur]=temp[i1++]; rK}*Uwut
else if(temp[i1] data[cur]=temp[i1++]; ##1[/D(
else \W}?4kz
data[cur]=temp[i2++]; WR gAc%
} 2/qfK+a
} &{/ `Q,
O'A''}M
} { S4?L8
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改进后的归并排序: Q5{i#F7nJm
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package org.rut.util.algorithm.support; :}e*3={4
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import org.rut.util.algorithm.SortUtil; .2[>SI
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/** ^\{%(i9
* @author treeroot ^e<0-uM"s
* @since 2006-2-2 zZ OoPE
* @version 1.0 _"##p
*/ pkjL2U:
public class ImprovedMergeSort implements SortUtil.Sort { a}0\kDe
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private static final int THRESHOLD = 10; qW$IpuK
lmQ!q>N
/* E;| q
* (non-Javadoc) L8/o9N1
* hTf]t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i1\xZ<|0
*/ =pN?h<dc
public void sort(int[] data) { Xv9kJ
int[] temp=new int[data.length]; .LN&EfMenF
mergeSort(data,temp,0,data.length-1); !+JSguy
} u}qfwVX Z
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private void mergeSort(int[] data, int[] temp, int l, int r) { 6V*@ {
int i, j, k; vn6/H8
int mid = (l + r) / 2; 3)EslBA7i
if (l == r) ~}$:iyJV(>
return; K>w}(td
if ((mid - l) >= THRESHOLD) +mMn1&
mergeSort(data, temp, l, mid); < 5;0LPU
else -r/#20Y
insertSort(data, l, mid - l + 1); bhnm<RZ
if ((r - mid) > THRESHOLD) m/cbRuPWgP
mergeSort(data, temp, mid + 1, r); 8y/YX
else *8kg6v%
insertSort(data, mid + 1, r - mid); =_D82`p
-Z4J?b
for (i = l; i <= mid; i++) { lVARe3#
temp = data; DTlM}
} nxA]EFS
for (j = 1; j <= r - mid; j++) { `IFt;Ja\6
temp[r - j + 1] = data[j + mid]; 0A9x9l9Wd
} WFjNS'WI_
int a = temp[l]; D3HE~zkI
int b = temp[r]; <E&1HeP
for (i = l, j = r, k = l; k <= r; k++) { D$YAi%*H
if (a < b) { j/#kO?
data[k] = temp[i++]; V`pTl3
a = temp; ;]i&AAbj
} else { 7iLm_#M
data[k] = temp[j--]; nyw,Fu
b = temp[j]; )j',e$m
} vD[@cm
} gD@ &/j7
} UH%oGp$ykX
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/** % 95:yyH 0
* @param data TEh]-x`
* @param l O->i>d
* @param i <{[AG3/Zj4
*/ qaA\.h7
private void insertSort(int[] data, int start, int len) { })M$#%(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A AH-Dj|&l
} o~NeS|a
} ?\<2*sW [k
} d?v#gW
} _-o*3gmbQ
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堆排序： E,c~.jYc
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package org.rut.util.algorithm.support; = EyxM
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import org.rut.util.algorithm.SortUtil; kZU8s'C
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/** q&<#)#+
* @author treeroot Zv7@
* @since 2006-2-2 L}XEROTR
* @version 1.0 Dr6Br<yi
*/ $\81WsL'
public class HeapSort implements SortUtil.Sort{ \S=!la_T@m
umcbIi('
/* (non-Javadoc) ,^26.p$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S4qh8c
*/ ]1)@.b;QR
public void sort(int[] data) { ,\+tvrR4X
MaxHeap h=new MaxHeap(); <j ;HRm
h.init(data); :`:<JA3,
for(int i=0;i h.remove(); nd3]&occ
System.arraycopy(h.queue,1,data,0,data.length); thipfS
} t<ftEJU"'w
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private static class MaxHeap{ pqMvYF
c`doR(oZ
void init(int[] data){ iBp 71x65
this.queue=new int[data.length+1]; 2mu~hJ
for(int i=0;i queue[++size]=data; F#X\}MvEU
fixUp(size); }2`S@Rq.WW
} <Ks?g=K-
} /D1Bf:'(
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private int size=0; %bDd
hf:n!+,C
private int[] queue; ?=r!b{9
j@GMZz<
public int get() { 1Y}gki^F
return queue[1]; RVI],O
} ^3=8*Xr
)Bb :tz+
public void remove() { EF"ar
SortUtil.swap(queue,1,size--); ,J}lyvkd
fixDown(1); mNb+V/*x3
} <(BAws(X
file://fixdown F<V zVEx
private void fixDown(int k) { _JR4 PKtx
int j; Z]w_2- -
while ((j = k << 1) <= size) { O])/kS`
if (j < size %26amp;%26amp; queue[j] j++; WCR+ZXI?1
if (queue[k]>queue[j]) file://不用交换 /3KEX{'@U
break; 2mU}"gf[
SortUtil.swap(queue,j,k); ?ZDx9*f
k = j; U-WrZ|-
} X\1D[n:
} (a^F`#]
private void fixUp(int k) { XJ?@l3D:
while (k > 1) { A]H+rxg
int j = k >> 1; h$ZF[Xbfe
if (queue[j]>queue[k]) n0vPW^EQ
break; SCGQo.~,
SortUtil.swap(queue,j,k); N"E\o,_
k = j; +S/8{2%?DG
} A%Bz52yg
} =602%ef\
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} FfD2 &(-R
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} 3_33@MM
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SortUtil： @kqy!5)K
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package org.rut.util.algorithm; OcSLRN?t
U{ahA
import org.rut.util.algorithm.support.BubbleSort; dDm<'30?*v
import org.rut.util.algorithm.support.HeapSort; [Xz7.<0#U
import org.rut.util.algorithm.support.ImprovedMergeSort; .Dx]wv
import org.rut.util.algorithm.support.ImprovedQuickSort; M2oKLRt)L
import org.rut.util.algorithm.support.InsertSort; )%MBo.NL
import org.rut.util.algorithm.support.MergeSort; eGguq~s`
import org.rut.util.algorithm.support.QuickSort; {?m',sG;&
import org.rut.util.algorithm.support.SelectionSort; ~+T~}S
import org.rut.util.algorithm.support.ShellSort; aX~iY ~?_
*{-XN
/** DH9?~|
* @author treeroot a\%g_Q){
* @since 2006-2-2 Wg$MKc9Vy[
* @version 1.0 YEZ"BgUnbp
*/ 90ORx\Oeo
public class SortUtil { }RyYzm2
public final static int INSERT = 1; dvXu?F55
public final static int BUBBLE = 2; W0nRUAo[
public final static int SELECTION = 3; ,$*IJeKx
public final static int SHELL = 4; 54'z"S:W
public final static int QUICK = 5; t;4{l`dk
public final static int IMPROVED_QUICK = 6; YE^|G,]
public final static int MERGE = 7; J7l1-
public final static int IMPROVED_MERGE = 8; P"xP%zqo
public final static int HEAP = 9; k*n5+[U^tP
a]ftE\99
public static void sort(int[] data) { 8<g5.$xyz
sort(data, IMPROVED_QUICK); t=yM}#r$
} U|y+k`
private static String[] name={ >yL8C:J9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "1l d4/
}; Q}m)Q('Rk
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private static Sort[] impl=new Sort[]{ "0]i4d1l
new InsertSort(), r?Z8_5Y
new BubbleSort(), D vK}UAj=
new SelectionSort(), C"YM"9JSJ
new ShellSort(), &PGU%"rN
new QuickSort(), l9SbuT$U
new ImprovedQuickSort(), q'1rSK
new MergeSort(), v4 c_UFEh<
new ImprovedMergeSort(), X#pE!mT
new HeapSort() hsVWD,w
}; Dpof~o,f
.ipYZg'V
public static String toString(int algorithm){ m+V'*[O{
return name[algorithm-1]; j[c|np4k\
} !qy/'v4
+=:CW'B5
public static void sort(int[] data, int algorithm) { Mb+cXdZb
impl[algorithm-1].sort(data); %pV/(/Q
} 'GNT'y_
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public static interface Sort { Pirc49c
public void sort(int[] data); 4INO .
} Q;`#ujxL
0h$23.
public static void swap(int[] data, int i, int j) { $7lI Dt
int temp = data; IEO5QV:u:
data = data[j]; \/'u(|G
data[j] = temp; ,qt9S0QS
} q*-q5FE
} LUJKR6oT{>