[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; No2b"G@
} &A#~)i5gF
int i1=l; MX>[^}n
int i2=mid+1; #plY\0E@
for(int cur=l;cur<=r;cur++){ JNcYJ[wqv
if(i1==mid+1) ?` SUQm
data[cur]=temp[i2++]; bINvqv0v
else if(i2>r) +r3IN){jz
data[cur]=temp[i1++]; 9Fn\FYUq
else if(temp[i1] data[cur]=temp[i1++]; );-~j
else h6dPO"
data[cur]=temp[i2++]; TLehdZ>^
} n~VD uKn9
} F R|&^j6
fNGZo
} E7-@&=]v
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改进后的归并排序: .k,YlFvj
w3jO6*_ M
package org.rut.util.algorithm.support; U`hY{E;
2wF8 P)
import org.rut.util.algorithm.SortUtil; Q_l'o3
Sna4wkbS
/** a22XDes=
* @author treeroot LdJYE;k Ju
* @since 2006-2-2 s+>:,U<A
* @version 1.0 G@j0rnn>B
*/ $AHQmyg<
public class ImprovedMergeSort implements SortUtil.Sort { \TU3rk&X
RejQ5'Neh
private static final int THRESHOLD = 10; ?6'rBH/w
V')0 Mr
/* sH\5/'?
* (non-Javadoc) `-LGU7~+
* Z1"v}g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T Q,?>6n
*/ =hl}.p
public void sort(int[] data) { 7g3>jh
int[] temp=new int[data.length]; $ MC)}l
mergeSort(data,temp,0,data.length-1); O$cHZs$
} .9.2Be
d^`?ed\1
private void mergeSort(int[] data, int[] temp, int l, int r) { TsTPj8GAl[
int i, j, k; kwsp9 0)
int mid = (l + r) / 2; cph:y
if (l == r) P9 Z}H(?C
return; zl`h~}I
if ((mid - l) >= THRESHOLD) V*~Zs'L'E
mergeSort(data, temp, l, mid); =JmT:enV
else Po%(~ )S>
insertSort(data, l, mid - l + 1); t45Z@hmcW
if ((r - mid) > THRESHOLD) &iV{:)L
mergeSort(data, temp, mid + 1, r); U,LTVYrO
else ]LM-@G+Jz
insertSort(data, mid + 1, r - mid); g&{9VK6.
i7ly[6{^pr
for (i = l; i <= mid; i++) { k!{p7*0
temp = data; #^]n0!
} P67o{EdK
for (j = 1; j <= r - mid; j++) { b6*!ACY
temp[r - j + 1] = data[j + mid]; 1x,tu}<u^
} jq!tT%o*B
int a = temp[l]; =)7s$ p
int b = temp[r]; D|.ic!w'
for (i = l, j = r, k = l; k <= r; k++) { {`w;39$+
if (a < b) { Pfs;0}h5
data[k] = temp[i++]; GQ-Rtn4v
a = temp; 7sXxq4
} else { )l#E}Uz
data[k] = temp[j--]; 1</kTm/Qa
b = temp[j]; y.q(vzg\_
} m?&1yU9
} )Dz+X9;g+
} !3ctB3eJ
ki)#d' }
/** 1PatH[T[
* @param data nakYn
* @param l 3@]SKfoo1
* @param i ,tg0L$qC
*/ CH<E,Z C1T
private void insertSort(int[] data, int start, int len) { gatB QwJb9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .e3+s*
} SZXY/~=h
} [#sz WNfU
} ]H1I,`=@
} fX|Y;S-@+
]i)j3WDz]
堆排序： @qHNE,K
n9xAPB }
package org.rut.util.algorithm.support; X<*U.=r)
k Zq!&
import org.rut.util.algorithm.SortUtil; zO MA
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/** {qa Aq%'
* @author treeroot x UD-iSY
* @since 2006-2-2 )d>!"JB-
* @version 1.0 HC}YY2
*/ +PuPO9jKO@
public class HeapSort implements SortUtil.Sort{ }O4^Cc6
w4d--[Q
/* (non-Javadoc) ]:~OG@(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uF3qD|I\
*/ |x-S&-
public void sort(int[] data) { 2]ape !(
MaxHeap h=new MaxHeap(); 4tS.G
h.init(data); fwRZ5`v<
for(int i=0;i h.remove(); X.e7A/ClEo
System.arraycopy(h.queue,1,data,0,data.length); xcf%KXJf6
} GHeVp/u
1OF& *
private static class MaxHeap{ 5EebPXBzB
$"H{4x`-
void init(int[] data){ &sL&\+=<(
this.queue=new int[data.length+1]; Q(oN/y3,
for(int i=0;i queue[++size]=data; b^$|Nz;
fixUp(size); L# 2+z@g
} jE/AA!DC#
} y)@[Sl>
5)MS~ii
private int size=0; & J2M1z%
)}?#
private int[] queue; ML>[^F
9 o&`5
public int get() { ^cz(}N 6&
return queue[1]; -B$2\ZE
} fu]s/'8B
8{X"h#
public void remove() { vsl]92xI
SortUtil.swap(queue,1,size--); hs$GN]
fixDown(1); <U\B!fO'
} _<OSqE
file://fixdown 3S}Pm2D2
private void fixDown(int k) { 2P@sn!*{1
int j; [6XF=L,!
while ((j = k << 1) <= size) { 1jF`5k
if (j < size %26amp;%26amp; queue[j] j++; ]h %Wiw
if (queue[k]>queue[j]) file://不用交换 ]n~ilS.rkl
break; ,~]tg77
SortUtil.swap(queue,j,k); MfWyc_
k = j; D5*q7A6
} k+ty>bP=
} W|g4z7Pb
private void fixUp(int k) { 4k@5/5zsM
while (k > 1) { >)M`IU[d^.
int j = k >> 1; K8UP,f2
if (queue[j]>queue[k]) )j0TeE1R
break; tE`u(B,
SortUtil.swap(queue,j,k); 2 Cv4=S
k = j; ZWKg9%y7
} k@3Q|na
} Tw;3_Lj
I ,z3xU
} \}"$ ?d'f
f m)pulz
} sWc*5Rt
)]H-BIuGm
SortUtil： [8*jw'W|[
+>{Y.`a;Jo
package org.rut.util.algorithm; [k;\SXDZo
<#u=[_H
import org.rut.util.algorithm.support.BubbleSort; \Ani}qQ%|
import org.rut.util.algorithm.support.HeapSort; C8V/UbA /
import org.rut.util.algorithm.support.ImprovedMergeSort; UVd7 JGR
import org.rut.util.algorithm.support.ImprovedQuickSort; rp!oO>F
import org.rut.util.algorithm.support.InsertSort; :?g:~+hfO
import org.rut.util.algorithm.support.MergeSort; G <i@ 5\#
import org.rut.util.algorithm.support.QuickSort; vnM@QfN
import org.rut.util.algorithm.support.SelectionSort; c*L0@Ak%
import org.rut.util.algorithm.support.ShellSort; AK*LyR?
R|(q
/** hp5|@
* @author treeroot 06c>$1-?
* @since 2006-2-2 x:7b/j-
* @version 1.0 &h^9}>rVjV
*/ LHkc7X$
public class SortUtil { 8o'_`{ba
public final static int INSERT = 1; ;U.hxh;+
public final static int BUBBLE = 2; CsoiyY -2
public final static int SELECTION = 3; XkXHGDEf1
public final static int SHELL = 4; ToXki,
public final static int QUICK = 5; 7!EBH(,z
public final static int IMPROVED_QUICK = 6; -ZRO@&tMD
public final static int MERGE = 7; KLitg6&P
public final static int IMPROVED_MERGE = 8; j}JrE,|
public final static int HEAP = 9; P3)Nl^/
g1W.mAA3B
public static void sort(int[] data) { DRp~jW(\y
sort(data, IMPROVED_QUICK); ifUGY[L
} _m gHJ0v'
private static String[] name={ ?fUlgQ}N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zMm#Rhn
}; QxVq^H
<SgM@0m
private static Sort[] impl=new Sort[]{ z$/_I0[
new InsertSort(), $Q96,rb}k;
new BubbleSort(), u'|4?"uz
new SelectionSort(), M<.d8?p )
new ShellSort(), cDFO;Dr
new QuickSort(), 1 u| wMO
new ImprovedQuickSort(), aWWU4xe
new MergeSort(), TDFkxB>
new ImprovedMergeSort(), aJ-K?xQ
new HeapSort() k.vBj~xU
}; sk,ox~0R
4'g;TI^
public static String toString(int algorithm){ b&~4t/Vq
return name[algorithm-1]; z(_Ss@ $
} '=nQ$/!q
![YX]+jqNp
public static void sort(int[] data, int algorithm) { #sPHdz'3M
impl[algorithm-1].sort(data); +cgSC5nR
} !`g~F\l
F)&@P-9+
public static interface Sort { EQb7-vhg
public void sort(int[] data); ysxb?6
} trPAYa}W
-xSA
public static void swap(int[] data, int i, int j) { Kwefs;<E?
int temp = data; \r /ya<5
data = data[j]; h]+C.Eqnt#
data[j] = temp; DnCP aM4%
} 7'Zky2F
} \`oT#|0