[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; yFM>T\@
} i_U}{|j
int i1=l; 8$}OS-
int i2=mid+1; Oif,|:
for(int cur=l;cur<=r;cur++){ Vxh.<b6&'
if(i1==mid+1) :oa9#c`L
data[cur]=temp[i2++]; Y<LNQ]8\G
else if(i2>r) h&'=F)5
data[cur]=temp[i1++]; AcC8)xRpk4
else if(temp[i1] data[cur]=temp[i1++]; O&$0&dhc
else Iql5T#K+
data[cur]=temp[i2++]; `Q%NSU?
} ,Y!zORv<7
} Q_4Zb
OE"<!oIs
} ((MLM3zJ
nl@E[yA9[
改进后的归并排序: xncwYOz
ybvI?#
package org.rut.util.algorithm.support; B\_[R'Pf&
f a5]a
import org.rut.util.algorithm.SortUtil; OFy,B-`A{
+1@AGJU3
/** Rd! 2\|
* @author treeroot b5 Q NEi
* @since 2006-2-2 \Ph7(ik
* @version 1.0 C\Ayv)S#2
*/ W_<4WG
public class ImprovedMergeSort implements SortUtil.Sort { iBvOJs
arj$dAW
private static final int THRESHOLD = 10; Q}P-$X+/ n
j Z'&0x"U
/* ?q Xs-
* (non-Javadoc) l3J$md|f
* ;~/4d-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JR1*|u
*/ H/jm f5
public void sort(int[] data) { l{%a&/
int[] temp=new int[data.length]; dlD}Ub
mergeSort(data,temp,0,data.length-1); :p-Y7CSSu
} - ]Y wl
kwar}:`
private void mergeSort(int[] data, int[] temp, int l, int r) { (@Zcx9
int i, j, k; yJ/#"z=h?
int mid = (l + r) / 2; bUvK
if (l == r) l)8sw=
return; 7/>a:02
if ((mid - l) >= THRESHOLD) abWl ut
mergeSort(data, temp, l, mid); =kFuJ x)f
else hKksVi
insertSort(data, l, mid - l + 1); g42T#p8^
if ((r - mid) > THRESHOLD) IJPgFZ7
mergeSort(data, temp, mid + 1, r); se,Z#H
else 9} *$n&B
insertSort(data, mid + 1, r - mid); ~3=2=Uf
/DU*M,
for (i = l; i <= mid; i++) { kxo.v|)8
temp = data; ;|30QUYh
} KO,_6>8]U
for (j = 1; j <= r - mid; j++) { iz`jDa Q|1
temp[r - j + 1] = data[j + mid]; V^En8
} cU+>|'f&
int a = temp[l]; d8:C3R
int b = temp[r]; kZ[mM'u#
for (i = l, j = r, k = l; k <= r; k++) { ]^@0+!
if (a < b) { e@j8T gI)
data[k] = temp[i++]; #:{6b*}
a = temp; @ER1zKK?
} else { %dmfBf Ev
data[k] = temp[j--]; Uu5C%9^s
b = temp[j]; pULsGb
} Ae3,^
} e2Jp'93o'
} 8^X]z|[d2
},PBqWe
/** UC|JAZL
* @param data fn1pa@P
* @param l G(\Ckf:
* @param i RgGA$HN/
*/ g1qi\axm
private void insertSort(int[] data, int start, int len) { 8]C1K Zs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7) 0q--B
} 2U%qCfh6|
} }n95< {
} [TCRB`nTQF
} _,Q[2gQ5N
!K\itOEP-
堆排序： 8c).8RLf
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package org.rut.util.algorithm.support; ) `I=oB
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import org.rut.util.algorithm.SortUtil; h5!d
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/** qLRE}$P
* @author treeroot |nm2Uy/0
* @since 2006-2-2 $ !5f"<FCB
* @version 1.0 K:w]>a
*/ (1 yGg==W.
public class HeapSort implements SortUtil.Sort{ %#9P?COs&W
h,]+>`b
/* (non-Javadoc) xjrlc9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A& =pw#
*/ stXda@y<p
public void sort(int[] data) { owMmCR
MaxHeap h=new MaxHeap(); oD,C<[(p
h.init(data); UTX](:TC
for(int i=0;i h.remove(); wlVvxX3%
System.arraycopy(h.queue,1,data,0,data.length); BWEv1' v
} .. UoyBV
<[9?Rj@
private static class MaxHeap{ (nz}J)T&
:c<*%*e
void init(int[] data){ SG`)PW?
this.queue=new int[data.length+1]; #eLN1q&Z
for(int i=0;i queue[++size]=data; OPiaG!3<
fixUp(size); M.[wKGX(
} Ff)@L-Y\K
} P;c0L;/
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private int size=0; {]["6V6W
*(nJX.7
private int[] queue; +-P<CCvWz
i[_|%'p
public int get() { o=mo/N4
return queue[1]; wA",SBGX
} y.ql#eQ,
.C?GW1[c~@
public void remove() { 4d-q!lRpa
SortUtil.swap(queue,1,size--); :<UtHf<=k
fixDown(1); 4k$0CbHx0
} 97]4 :Zv
file://fixdown `Sx.|`x8
private void fixDown(int k) { Yj3*)k
int j; QQ~23TlA
while ((j = k << 1) <= size) { yM|g|;U
if (j < size %26amp;%26amp; queue[j] j++; qmID-t"
if (queue[k]>queue[j]) file://不用交换 xFX&9^Uk
break; ['t8C
SortUtil.swap(queue,j,k); ;q&0,B
k = j; /f]/8b g>
} K @C4*?P
} hiIyaWU
private void fixUp(int k) { ,`"K
while (k > 1) { 9'X@@6b*'
int j = k >> 1; _XWnS9
if (queue[j]>queue[k]) <S{7Ro
break; e?1KbJ?.
SortUtil.swap(queue,j,k); e&ts\0
k = j; +9_,w bF
} '$*[SauAG
} D&f!( n
%r P !
} WP!il(Gr
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} dm 2EH
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SortUtil： ,\}k~ U99
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package org.rut.util.algorithm; 9R>~~~{-Go
GVZTDrC
import org.rut.util.algorithm.support.BubbleSort; "?[7#d])
import org.rut.util.algorithm.support.HeapSort; -U:2H7
import org.rut.util.algorithm.support.ImprovedMergeSort; `/c@nxh
import org.rut.util.algorithm.support.ImprovedQuickSort; I3An57YV].
import org.rut.util.algorithm.support.InsertSort; 5f{wJb2
import org.rut.util.algorithm.support.MergeSort; [x|)}P7%s
import org.rut.util.algorithm.support.QuickSort; ~.H~XKw
import org.rut.util.algorithm.support.SelectionSort; *F..ZS'$[
import org.rut.util.algorithm.support.ShellSort; 7P c(<Ui+
{yU0D*#6
/** cTy'JT7
* @author treeroot =G*z 53
* @since 2006-2-2 u9,=po=+7f
* @version 1.0 aC}p^Nkr"k
*/ s"N\82z)
public class SortUtil { Ta^.$O=F
public final static int INSERT = 1; 2;h+;G
public final static int BUBBLE = 2; MU*It"@}2
public final static int SELECTION = 3; cPSti
public final static int SHELL = 4; pSXEJ 2k
public final static int QUICK = 5; ?F25D2[(
public final static int IMPROVED_QUICK = 6; eN4t1$
public final static int MERGE = 7; St_Sl:m$
public final static int IMPROVED_MERGE = 8; 1[px`%DR~
public final static int HEAP = 9; >-eS&rma
SNN#$8\
public static void sort(int[] data) { RB *P0
sort(data, IMPROVED_QUICK); K9^"NS3
} &AJUY()8
private static String[] name={ _V&x`ks
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *cPN\Iu.W
}; yduuFK
wZ O@J|
private static Sort[] impl=new Sort[]{ ^t7_3%%w
new InsertSort(), 7<vy;"wB
new BubbleSort(), !9PX\Xbn
new SelectionSort(), *iYMX[$
new ShellSort(), ~Z7)x7 z
new QuickSort(), EFeAr@nj
new ImprovedQuickSort(), A^t"MYX@
new MergeSort(), R7,pukK
new ImprovedMergeSort(), UL[uh@4
new HeapSort() z41D^}b
}; AT-0}9z{
{x|MA(NO
public static String toString(int algorithm){ =8@RKG`>;
return name[algorithm-1]; wzg i @i
} K` 2i
16L"^EYq
public static void sort(int[] data, int algorithm) { |MVV +.X
impl[algorithm-1].sort(data); ig+k[`W
} 2G H)iUmc
:)j7U3u
public static interface Sort { JOPTc]
public void sort(int[] data); !#C)99L"F
} o16d`}/<
T:Bzz)2/
public static void swap(int[] data, int i, int j) { KoFv0~8Q
int temp = data; ? 1GJa]G
data = data[j]; TX&[;jsj
data[j] = temp; ~6] )*y
} $G)&J2zL
} 75<el.'H