[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; 8ZM?)#`@{
} 5m*iE*+
int i1=l; WQ~;;.v#
int i2=mid+1; <Y*+|T+&d
for(int cur=l;cur<=r;cur++){ :=}US}H$
if(i1==mid+1) `>gd&u
data[cur]=temp[i2++]; K$&s=Hm
else if(i2>r) ~xA-V4.
data[cur]=temp[i1++]; )bS~1n_0
else if(temp[i1] data[cur]=temp[i1++]; wF IegC(
else q$ZHd
data[cur]=temp[i2++]; G3+.H
} "9m2/D`=
} sNj)ZWgd>
3*]eigi)
} *S]Ci\{_
Q}1 R5@7
改进后的归并排序: [=E
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package org.rut.util.algorithm.support; -d~4A
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import org.rut.util.algorithm.SortUtil; dU6ou'pf
,p4&g)o
/** 2"0es40;0
* @author treeroot un)4eo!7
* @since 2006-2-2 V^7V[(~`
* @version 1.0 98j>1"8
*/ ~T ]m>A!
public class ImprovedMergeSort implements SortUtil.Sort { 88VZR&v
$}<PL}+
private static final int THRESHOLD = 10; =@m &s^R
.Obw|V-
/* udxFz2>_l$
* (non-Javadoc) J5di[nu
* gi(H]|=a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NgADKrDU
*/ $LKIT0
public void sort(int[] data) { }O/U;4Z
int[] temp=new int[data.length]; hLI`If/+K
mergeSort(data,temp,0,data.length-1); W}--p fG
} qmnZAk
jq-p;-i
private void mergeSort(int[] data, int[] temp, int l, int r) { ZO!I.
int i, j, k; Qt iDTr
int mid = (l + r) / 2; <A[E:*`*
if (l == r) VO,!x~S!
return; RS"H8P4W
if ((mid - l) >= THRESHOLD) e>7]w,*|
mergeSort(data, temp, l, mid); u}>#Eb
else |S_T^'<W
insertSort(data, l, mid - l + 1); 2VF%@p
if ((r - mid) > THRESHOLD) B268e
mergeSort(data, temp, mid + 1, r); k>F'ypm
else bBu,#Mc
insertSort(data, mid + 1, r - mid); @PN#p"KaT
g'pK
for (i = l; i <= mid; i++) { +1Vjw'P
temp = data; CAWA3fcQp
} iocI:b<
for (j = 1; j <= r - mid; j++) { 03xa'Of>
temp[r - j + 1] = data[j + mid]; O?NeSx1
} N8!cO[3Oh
int a = temp[l]; dA-2%uJ
int b = temp[r]; *YW/_
for (i = l, j = r, k = l; k <= r; k++) { 2{]`W57_=
if (a < b) { _,zA ^*b
data[k] = temp[i++]; Mx6@$tQ%
a = temp; 6,"IDH|ND
} else { \qR7mI/*
data[k] = temp[j--]; T:t]"d}}
b = temp[j]; 4FEk5D
} ?f#y1m
} /+8JCp
} uG?_< mun
$u7;TW6QD
/** DamCF
* @param data r^h4z`:L
* @param l x N=i]~
* @param i ]Gpxhg
*/ Yb:\a/ y
private void insertSort(int[] data, int start, int len) { P#pn*L*"T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E>&n.%
} %dJX-sm@
} 7x#Ckep:I
} 3Th'paMG
} 09dK0H3(
m/v9!'cMI
堆排序： /4tj3B,
gfX\CSGy
package org.rut.util.algorithm.support; [!!o-9b
if}-_E<F
import org.rut.util.algorithm.SortUtil; `o<' x.I
=2[7 E
/** EzDk}uKY0R
* @author treeroot r9X?PA0f
* @since 2006-2-2 Ae mDJ8Y
* @version 1.0 J+[_Wd
*/ 4?0vso*X<:
public class HeapSort implements SortUtil.Sort{ ">~.$Jp_4
7Ok;Lt!x
/* (non-Javadoc) cS>e?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^9^WuSq
*/ &@%W29:
public void sort(int[] data) { UH]l9Aq$P
MaxHeap h=new MaxHeap(); 9!T[Z/}T
h.init(data); *j]9vktH
for(int i=0;i h.remove(); eL^.,H0
System.arraycopy(h.queue,1,data,0,data.length); NxjB/N
} e&7JpT
/[O(ea$U
private static class MaxHeap{ PH`9MXh
="x\`+U
void init(int[] data){ 'pm2n0
this.queue=new int[data.length+1]; m6n?bEl6I
for(int i=0;i queue[++size]=data; wm]^3qI2
fixUp(size); MG[o%I96
} Ne#WI'
} +lJG(Qd
p+l!6
private int size=0; ElS9?Q+
r~N"ere26
private int[] queue; )A!>=2M`
(EK"V';
public int get() { OC1I&",Ai|
return queue[1]; }-ftyl7
} KiI!frm1
HHiT]S9
public void remove() { XID<(HBA"!
SortUtil.swap(queue,1,size--); Z^V6K3GSz-
fixDown(1); N5*u]j
} +u!0rLb
file://fixdown XS`M-{f`
private void fixDown(int k) { s >e=?W
int j; Wi[~fI8^!
while ((j = k << 1) <= size) { "J+3w
if (j < size %26amp;%26amp; queue[j] j++; ~2<7ZtV=
if (queue[k]>queue[j]) file://不用交换 ]d,S749(s
break; >2~+.WePu
SortUtil.swap(queue,j,k); uvtF_P/
k = j; lrnyk(M}Q.
} *F ?8c
} U"q/rcA
private void fixUp(int k) { )E6;-rD0^+
while (k > 1) { b`)){LR
int j = k >> 1; m_=$0m J$
if (queue[j]>queue[k]) ^dP KDrKxh
break; *:>"q ej
SortUtil.swap(queue,j,k); mocI&=EF2X
k = j; -QOw8vm
} {LX.iH9}l
} [QMu2
Sl-v W
} `VKf3&|<A
AFc$%\s4
} Vnx,5E&
?"zY"*>4
SortUtil： t<~$
f@8>HCI
package org.rut.util.algorithm; Vl_:c75"
}@Ge}9$h
import org.rut.util.algorithm.support.BubbleSort; 'a$Gv&fu
import org.rut.util.algorithm.support.HeapSort; hGd<<\
import org.rut.util.algorithm.support.ImprovedMergeSort; {Z3dF)>
import org.rut.util.algorithm.support.ImprovedQuickSort; |~'IM3Jw(Y
import org.rut.util.algorithm.support.InsertSort; M@4UGM`J
import org.rut.util.algorithm.support.MergeSort; j'%$XvI
import org.rut.util.algorithm.support.QuickSort; z|asa*
import org.rut.util.algorithm.support.SelectionSort; Lg~B'd8m
import org.rut.util.algorithm.support.ShellSort; w4W_iaU
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/** CamE'
* @author treeroot ?_"+^R z
* @since 2006-2-2 j7sKsbb
* @version 1.0 0G7K8`a
*/ u}!@ ,/)
public class SortUtil { 'd+NVj{C
public final static int INSERT = 1; 0$7s^?G0
public final static int BUBBLE = 2; mjWU0Gh%*
public final static int SELECTION = 3; 66.5QD0
public final static int SHELL = 4; e&>;*$)
public final static int QUICK = 5; N@O8\oQG
public final static int IMPROVED_QUICK = 6; p"l3e9&'j
public final static int MERGE = 7; 3l3+A+n
public final static int IMPROVED_MERGE = 8; @;<ht c
public final static int HEAP = 9; jV? }9L^;
PQK(0iCo4
public static void sort(int[] data) { k]5Bykf`Ky
sort(data, IMPROVED_QUICK); .C2TQ:B,.
} kGd<5vCs
private static String[] name={ iXjo[Rz^C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OfctoPP _0
}; +n<k)E@>J
]%BWIqbr
private static Sort[] impl=new Sort[]{ dxZu2&gi
new InsertSort(), Ix(?fO#uNF
new BubbleSort(), Gm9hYhC8
new SelectionSort(), ?[)}l9
new ShellSort(), zX0mdx<|<
new QuickSort(), <$F\Nk|x
new ImprovedQuickSort(), yY[<0|o u
new MergeSort(), JJ{9U(`_y6
new ImprovedMergeSort(), (FJ9-K0b{n
new HeapSort() 4m*M,#mV
}; d?:=PH
*xON W
public static String toString(int algorithm){ %F:)5gT?
return name[algorithm-1]; EhO|~A*R
} E<C&Cjz:H
U Z|HJ8_
public static void sort(int[] data, int algorithm) { dbOdq
impl[algorithm-1].sort(data); hQ(qbt{e
} 'ihhoW8
Qu}W/j|3
public static interface Sort { 1Wm)rXW[x
public void sort(int[] data); *+uHQgn(
} O~59FuL
1gmt2>#v%
public static void swap(int[] data, int i, int j) { ?Y:8eD"*
int temp = data; 94 e): jS
data = data[j]; 2Fz|fW_
data[j] = temp; [8Qro8
} =QK$0r]c'k
} H"C[&r