[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; 403[oOj
} T>}0) s
int i1=l; z%(Fo2)^
int i2=mid+1; aq3~!T;W
for(int cur=l;cur<=r;cur++){ %KGq*|GUu
if(i1==mid+1) 9T(L"9r-e
data[cur]=temp[i2++]; 21r== H$
else if(i2>r) 63W{U/*aao
data[cur]=temp[i1++]; e]lJqC
else if(temp[i1] data[cur]=temp[i1++]; !ZFr7Xz
else 9n1ZVP.ag
data[cur]=temp[i2++]; !Y (apVQ
} QX[Djz0H8
} q@(1Yivk
10p8|9rE}B
} <fN; xIB
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改进后的归并排序: Vclr)}5
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package org.rut.util.algorithm.support; !c%
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import org.rut.util.algorithm.SortUtil; l , ..5
QV7,G9
/** .*BA 1sjE
* @author treeroot Yc^%zxub
* @since 2006-2-2 &5?G-mn
* @version 1.0 AXs=1 e
*/ MDJc[am
public class ImprovedMergeSort implements SortUtil.Sort { 11@]d]v ,
bmu6@jT
private static final int THRESHOLD = 10; 089 k.WG
e}c&LDgU
/* B`fH^N
* (non-Javadoc) $B\ H
* i}v9ut]B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2-~|Z=eGW
*/ w5`#q&?
public void sort(int[] data) { B MM--y@
int[] temp=new int[data.length]; gH[,Xx?BN!
mergeSort(data,temp,0,data.length-1); +Mk#9r
} Y;Ap9i*
`H>b5
private void mergeSort(int[] data, int[] temp, int l, int r) { K/txD20 O|
int i, j, k; ks*Y9D*=
int mid = (l + r) / 2; r`jWp\z
if (l == r) Rf)ke("
return; /@hJpz|+
if ((mid - l) >= THRESHOLD) 0"78/6XIs
mergeSort(data, temp, l, mid); aBhV3Fd[B
else iib
insertSort(data, l, mid - l + 1); v!9i"@<!
if ((r - mid) > THRESHOLD) ]ab#q=
mergeSort(data, temp, mid + 1, r); 7{e=="#*
else !4WEk
insertSort(data, mid + 1, r - mid); 5{K}?*3hJ
hN3u@P^
for (i = l; i <= mid; i++) { ib$nc2BPb
temp = data; D'b#,a;V
} g JjN<&,
for (j = 1; j <= r - mid; j++) { (CJ.BHu]
temp[r - j + 1] = data[j + mid]; pXu/(&?
} MV0Lq:# N
int a = temp[l]; i%-Ld Ka}"
int b = temp[r]; x({H{'9?
for (i = l, j = r, k = l; k <= r; k++) { :=Kx/E:1
if (a < b) { e$e#NoN
data[k] = temp[i++]; 5|I55CTx
a = temp; c3)C{9T](
} else { c)}2K0
data[k] = temp[j--]; w8Vw1wW
b = temp[j]; l>6@:nq|R
} oH#v6{y
} \K iwUz
} -r<#rITH"
HfB@vw^
/** CSTI?A"P
* @param data >9H@|[C
* @param l n6MM5h/#r
* @param i F%d\~Vj
*/ .fYZ*=P;c
private void insertSort(int[] data, int start, int len) { ?F7o!B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t<j^q`;@v
} +Qxu$#
} \.uc06
} j(rL
} lFSe?X^
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堆排序： 0d^Z uTN
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package org.rut.util.algorithm.support; (`BSVxJH
6KZf%)$
import org.rut.util.algorithm.SortUtil; S4CbyXW
zYY$D.
/** ])DX%$f
* @author treeroot Y&HK1>M_
* @since 2006-2-2 5O/i3m26
* @version 1.0 px;/8c-
*/ -r7]S
public class HeapSort implements SortUtil.Sort{ L!Cz'm"Nl
o Y}]UB>
/* (non-Javadoc) .@q-B+Eg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a:,y Z
*/ uX/$CM
public void sort(int[] data) { 8~lIe:F-
MaxHeap h=new MaxHeap(); S~Z|PLtF
h.init(data); :O<bA&:d
for(int i=0;i h.remove(); l_tw<`Ep
System.arraycopy(h.queue,1,data,0,data.length); lbdTQ6R
} wXMDh$
I04jjr:<
private static class MaxHeap{ l_'[27
^ KK_qC
void init(int[] data){ X~=xXN.
this.queue=new int[data.length+1]; wxg^Bq)D*R
for(int i=0;i queue[++size]=data; <h).fX
fixUp(size); YTQt3=1ii
} j(:I7%3&(*
} f3j{VN
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private int size=0; >_dx_<75&
Q5{Pv}Jx
private int[] queue; ,#FLM`
!Z!g:II /
public int get() { )n49lr6X
return queue[1]; U[L9*=P;
} %CwL:.|
,;?S\V
public void remove() { `@d<n
SortUtil.swap(queue,1,size--); YJg,B\z}
fixDown(1); znJhP}(
} (&|_quP7O
file://fixdown -9 !.m
private void fixDown(int k) { wbDM5%
int j; O%g$9-?F0
while ((j = k << 1) <= size) { E:zF/$tG
if (j < size %26amp;%26amp; queue[j] j++; C51bc6V
if (queue[k]>queue[j]) file://不用交换 Y2B&go
break; ^;,M}|<h
SortUtil.swap(queue,j,k); 9a\nszwa
k = j; [ EFMu;q
} Spo?i.#
} k#8Ti"0
private void fixUp(int k) { )"zvwgaW
while (k > 1) { UYk>'\%H0
int j = k >> 1; DRqZ,[!+
if (queue[j]>queue[k]) )"f N!9,F
break; dm-pxE "
SortUtil.swap(queue,j,k); Mb3}7@/[
k = j; |qZko[W}=
} 1im^17X
} X[#zCM
8+]hpa,q
} 3lV^B[$
U\/5;Txy(
} (feTk72XX
.@ xF6UZ
SortUtil： x21dku<6K[
zR!o{8
package org.rut.util.algorithm; ?JL7=o X
o6f_l^+H
import org.rut.util.algorithm.support.BubbleSort; tiN?/
import org.rut.util.algorithm.support.HeapSort; cvwhSdZu8
import org.rut.util.algorithm.support.ImprovedMergeSort; =%'`YbD$
import org.rut.util.algorithm.support.ImprovedQuickSort; ]9}HEu;1M
import org.rut.util.algorithm.support.InsertSort; zF5uN:-s
import org.rut.util.algorithm.support.MergeSort; 7t,t`
import org.rut.util.algorithm.support.QuickSort; G-9iowS/A
import org.rut.util.algorithm.support.SelectionSort; VG/3xR&y
import org.rut.util.algorithm.support.ShellSort; )54%HM_$k
vI$t+m:
/** ?+T^O?r|O
* @author treeroot s@MYc@k
* @since 2006-2-2 \om%Q[F7a
* @version 1.0 .]aF 1}AI
*/ iC iZJ"
public class SortUtil { qfcYE=
public final static int INSERT = 1; p ?wI9GY
public final static int BUBBLE = 2; 2Z20E$Cb
public final static int SELECTION = 3; g$. \
public final static int SHELL = 4; e#/E~r&
public final static int QUICK = 5; =]3tUD
public final static int IMPROVED_QUICK = 6; p4VeRJk%
public final static int MERGE = 7; UT}i0I9
public final static int IMPROVED_MERGE = 8; A(]H{>PMy
public final static int HEAP = 9; EGl^!.'
VLBE'3Qg1
public static void sort(int[] data) { Be+0NXLVy
sort(data, IMPROVED_QUICK); t>8XTqqi
} !mXxAo
private static String[] name={ fwzb!"!.@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AIA6yeaU
}; $%VuSrZ&
a<]B B$~
private static Sort[] impl=new Sort[]{ qY 4#V k
new InsertSort(), *%KKNT'*
new BubbleSort(), $ cj>2.
new SelectionSort(), tH'2gl
new ShellSort(), Zw wqSyuGf
new QuickSort(), !%dN<%Ah
new ImprovedQuickSort(), wf1lyS
new MergeSort(), BB|?1"neg
new ImprovedMergeSort(), VY)s+Bx
new HeapSort() uYrfm:4S
}; DNP13wp@
V]90
public static String toString(int algorithm){ gk`zA
return name[algorithm-1]; [@4rjGwB
} 1 hg}(Hix
-GLMmZJt
public static void sort(int[] data, int algorithm) { G9JAcO1
impl[algorithm-1].sort(data); u+{a8=
} ;2Q~0a|
+VQ\mA59
public static interface Sort { @?"h !fyu
public void sort(int[] data); <]G]W/eB'
} QNDHOo>v
/r_~:3F
public static void swap(int[] data, int i, int j) { F5o+kz$;
int temp = data; LY-2sa#B$-
data = data[j]; n@G[
data[j] = temp; |^@dFOz
} z3uW)GQ.
} Zdn~`Q{