[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; 8=pv/o
} !G[f[u4Zg
int i1=l; ?-S8yqe
int i2=mid+1; Lz?*B$h
for(int cur=l;cur<=r;cur++){ OOfyGvs
if(i1==mid+1) (H2ylMpQt
data[cur]=temp[i2++]; ajGcKyj8i
else if(i2>r) 6N?#b66
data[cur]=temp[i1++]; W7$s5G,
else if(temp[i1] data[cur]=temp[i1++]; gY%OhYtF2
else }Zt.*%
data[cur]=temp[i2++]; ot0U-G(
} `ReGnT[
} &M$Bt} <
Enu!u~1]F
} !*5_pGe
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改进后的归并排序: dK`(BA{`3
aj?2jU~Pq
package org.rut.util.algorithm.support; 7MoR9,(
Ca X^)
import org.rut.util.algorithm.SortUtil; %uj[`
>T`zh^+5W
/** 1y 1_6TZ+
* @author treeroot CX]RtV!
* @since 2006-2-2 sbgJw
* @version 1.0 Etw~*
*/ Q*Y4m8wY
public class ImprovedMergeSort implements SortUtil.Sort { O/(3 87=U
i},d[
private static final int THRESHOLD = 10; &yB%QX{3
y2GQN:X
/* k&yQ98H$K"
* (non-Javadoc) /q T E
* uL bp.N8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ::v;)VdX+*
*/ ^)Smv\Md
public void sort(int[] data) { o T:j:n
int[] temp=new int[data.length]; akMJ4EF/
mergeSort(data,temp,0,data.length-1); ]F !'M
} J`4Z<b53
-!@H["
private void mergeSort(int[] data, int[] temp, int l, int r) { 5QKRI)XpZ
int i, j, k; 15o9CaQw4"
int mid = (l + r) / 2; yq1Gqbh l
if (l == r) L^6"'#
return; I; ^xAd3G
if ((mid - l) >= THRESHOLD) K1/ U (A
mergeSort(data, temp, l, mid); 92s4u3L;
else fdN45in=>
insertSort(data, l, mid - l + 1); R_t~UTfI;
if ((r - mid) > THRESHOLD) Yd[U
mergeSort(data, temp, mid + 1, r); [|y`y%
else D% oueW
insertSort(data, mid + 1, r - mid); T:be 9 5!,
G}182"#4
for (i = l; i <= mid; i++) { GVeL~Q
temp = data; kZJt~}
} 7F,07\c
for (j = 1; j <= r - mid; j++) { f;e_04K
temp[r - j + 1] = data[j + mid]; rH[5~U
} d#E(~t(^
int a = temp[l]; pTc$+Z73
int b = temp[r]; >/(i3)
for (i = l, j = r, k = l; k <= r; k++) { >?^~s(t
if (a < b) { E7V38Z
data[k] = temp[i++]; -FQC9~rR;g
a = temp; -b].SG5S
} else { eLCdAr
data[k] = temp[j--]; N<p5p0
b = temp[j]; H0: iYHu
} <l*agH-.3
} Kl4isGcr]
} ;7;zhJs1t
1[26w_B3
/** Tm(Q@
* @param data eKL]E!
* @param l FgXu1-
* @param i );0<Odw%.
*/ qXXYF>Z-
private void insertSort(int[] data, int start, int len) { <FCj)CP%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z8 hTZU
} }rO?5
} }@3Ud' Y
} k\sc }z8X
} MDMtOfe|
;n%]*v
堆排序： ST[2]
pem3G5 `g=
package org.rut.util.algorithm.support; 'CP/ymf/a
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import org.rut.util.algorithm.SortUtil; L!CX&
`'z(--J}`
/** h$E\2lsE
* @author treeroot >t1_5
* @since 2006-2-2 ^VSt9&
* @version 1.0 o?:;8]sr!
*/ ^n\9AE3
public class HeapSort implements SortUtil.Sort{ u5xU)l3
BP)q6?Mz
/* (non-Javadoc) F{#N6,T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AyQS4A.s[
*/ 7Vz[ji
public void sort(int[] data) { Tns?mQ
MaxHeap h=new MaxHeap(); qZT 4+&y
h.init(data); 'Qm` A=
for(int i=0;i h.remove(); :z0s*,QH
System.arraycopy(h.queue,1,data,0,data.length); Ss"|1]acP
} hQgk.$g
2ApDpH`fiJ
private static class MaxHeap{ ga4/,
F/Rng'l
void init(int[] data){ _n-VgPRn
this.queue=new int[data.length+1]; ?aK'OIo
for(int i=0;i queue[++size]=data; 37j\D1Y
fixUp(size); {:};(oz)f
} F&W0DaH
} =oL8d6nI
7Y-FUZ.`>
private int size=0; m.\ >95!
uE,i-g0$Id
private int[] queue; jMm_A#V>p
sDaT[).Hm
public int get() { oj,HJH+
return queue[1]; Uv @!i0W
} g|&.v2 '
?D*Hl+iu
public void remove() { u4b3bH9U
SortUtil.swap(queue,1,size--); 4_6W s$x
fixDown(1); E5,%J
} #}[Sj-Vp
file://fixdown 6=Y3(#Ddt
private void fixDown(int k) { rh:s 7
int j; 8! |.H p
while ((j = k << 1) <= size) { VYl_U?D
if (j < size %26amp;%26amp; queue[j] j++; >:Rt>po8|w
if (queue[k]>queue[j]) file://不用交换 D\45l
break; {#dp-5V
SortUtil.swap(queue,j,k); v7{ P].M
k = j; jQ.>2-;H9
} Xm"w,J&
} nhVK?
private void fixUp(int k) { L:t)$iF5+
while (k > 1) { IEno.i\
int j = k >> 1; N3XVT{yo
if (queue[j]>queue[k]) dvg;
break; p"hm.=,
SortUtil.swap(queue,j,k); OBKC$e6I
k = j; Ak\D6eHcB
} eeI9[lTw
} (]zl$*k
sx)$=~o
} mC{!8WC@k
2R_opbw
} uZqu xu.
*#prSS
SortUtil： VV0EgfJ
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package org.rut.util.algorithm; q_9N+-?{7
+YQ)}v
import org.rut.util.algorithm.support.BubbleSort; +,vJ7
import org.rut.util.algorithm.support.HeapSort; {L-{Y<fke
import org.rut.util.algorithm.support.ImprovedMergeSort; M/8#&RycQ
import org.rut.util.algorithm.support.ImprovedQuickSort; ;*>QG6Fh
import org.rut.util.algorithm.support.InsertSort; |k7ts&2
import org.rut.util.algorithm.support.MergeSort; YWcui+4p}
import org.rut.util.algorithm.support.QuickSort; T(sG.%
import org.rut.util.algorithm.support.SelectionSort; Pq{YZMr
import org.rut.util.algorithm.support.ShellSort; LhVLsa(-%
0btmao-
/** :N*q;j>
* @author treeroot 8M3p\}O
* @since 2006-2-2 +e\:C~2f28
* @version 1.0 k"DQbUy0L
*/ DMK"Q#Vw
public class SortUtil { 43}&w.AS
public final static int INSERT = 1; lk+=26>
public final static int BUBBLE = 2; eo<~1w
public final static int SELECTION = 3; %CsTB0Y7n,
public final static int SHELL = 4; 8CnvvMf
public final static int QUICK = 5; lvz:UWo
public final static int IMPROVED_QUICK = 6; \DcC1W
public final static int MERGE = 7; fUL{c,7xda
public final static int IMPROVED_MERGE = 8; mk[d7Yt{O
public final static int HEAP = 9; e%@[d<Ta\
G8<It5CU
public static void sort(int[] data) { wNf*/?N
sort(data, IMPROVED_QUICK); e$/Zb`k
} of[|b{Ze4~
private static String[] name={ B!E<uVC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6M<mOhp@}n
}; X/;"CM
H,4,~lv|
private static Sort[] impl=new Sort[]{ 3$kv%uf{
new InsertSort(), >ihe|WN
new BubbleSort(), *\~kjZ 3
new SelectionSort(), cVP49r}}v
new ShellSort(), j_ywG{Jk
new QuickSort(), d~z<,_r5c
new ImprovedQuickSort(), QLpTz"H
new MergeSort(), g6a3MJV`
new ImprovedMergeSort(), 0R%uVJG
new HeapSort() "]\":T
}; 1Z$99
@x-GbK?
public static String toString(int algorithm){ B'BbTI,
return name[algorithm-1]; Nh7!Ah
} 4K?H-Jco
{;z L[AgCg
public static void sort(int[] data, int algorithm) { #35S7G^@`
impl[algorithm-1].sort(data); !,(bXa\^
} 3sg)]3jm2
IDk:jO
public static interface Sort { _^2[(<Gmv
public void sort(int[] data); S>ylAU;N
} C;:1CK
t+)GB=C
public static void swap(int[] data, int i, int j) { * SON>BSF
int temp = data; B43#9CK`o
data = data[j]; vM4`u5
data[j] = temp; zH\;pmWiN9
} ks`
} 0R^(rE"2#