[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; Ns\};j?TU*
} ofs'xs1C
int i1=l; ZsP>CELm@
int i2=mid+1; okO\A^F
for(int cur=l;cur<=r;cur++){ ]\/"-Y#4Q
if(i1==mid+1) 3sl6$NKo
data[cur]=temp[i2++]; \GZ|fmYn
else if(i2>r) \0FwxsL
data[cur]=temp[i1++]; tF.N
else if(temp[i1] data[cur]=temp[i1++]; O;0VKNn['
else `4ti?^BNm
data[cur]=temp[i2++]; j-| !QlB
} 5inCAPXz
} nXERj; Q"
1'1>B
} ffsF], _J
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改进后的归并排序: 6A ptq
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package org.rut.util.algorithm.support; mA^3?yj
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import org.rut.util.algorithm.SortUtil; VKSn \HT~
Th$xk9TK^@
/** .S]*A b
* @author treeroot @h/-P'Lc=7
* @since 2006-2-2 4,BJK`{
* @version 1.0 ('o}EoXS
*/ #JN4K>_4
public class ImprovedMergeSort implements SortUtil.Sort { i\x@s>@x}
xWM?E1@
private static final int THRESHOLD = 10; n"@){:{4?
ZWKvz3Wt
/* (&X/n=UI
* (non-Javadoc) 7vc4 JO]
* AGhr(\j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sW]>#e
*/ kF-7OX0)
public void sort(int[] data) { o%E-K=a
int[] temp=new int[data.length]; E>c*A40=.n
mergeSort(data,temp,0,data.length-1); tS3!cO\
} OE/r0C<&
]u|5ZCv0
private void mergeSort(int[] data, int[] temp, int l, int r) { {VE1c'E"V?
int i, j, k; nTv^][
int mid = (l + r) / 2; &8HJ4Vj2
if (l == r) +8}8b_bgH
return; 8}aSSL]
if ((mid - l) >= THRESHOLD) `3^%ft~l
mergeSort(data, temp, l, mid); 3[UaK`/1C
else /"@k_[O
insertSort(data, l, mid - l + 1); _ |G') 9
if ((r - mid) > THRESHOLD) LS/ZZAN u
mergeSort(data, temp, mid + 1, r); 8a;;MJ)
else .R^q$U~v3
insertSort(data, mid + 1, r - mid); t=IM"ZgfL
0ZJrK\K;
for (i = l; i <= mid; i++) { th|'t}bWV
temp = data; )O,+'w?
} =AP0{
for (j = 1; j <= r - mid; j++) { [{PmU~RMYf
temp[r - j + 1] = data[j + mid]; Iuve~ugO
} 3Vk<hBw2
int a = temp[l]; J\?d+}hynX
int b = temp[r]; vhrURY.
for (i = l, j = r, k = l; k <= r; k++) { b"(bT6XO!
if (a < b) { $Yj4&Two<
data[k] = temp[i++]; *5mJA -[B+
a = temp; T5eJIc3a"
} else { ^S:I38gR#q
data[k] = temp[j--]; LHMA-0$?)
b = temp[j]; u}-)ywX
} v*&WqVg
} 2OwO|n
} s+9b.
0Wb3M"#9<
/** YK V"bI
* @param data (m() r0:@
* @param l 2Uy}#n|)r
* @param i u vyvy
*/ +7Qj%x\
private void insertSort(int[] data, int start, int len) { XZ4H(Cj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^.~ F_
} ,-V7~gM%}
} Lpk`qJ
} F~l:WQAj
} 5XZ\7Z|
m^;A]0h+
堆排序： D26A%[^O
T#3`&[
package org.rut.util.algorithm.support; `;Xwv)
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import org.rut.util.algorithm.SortUtil; Ym wb2]M
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/** g7r0U6Y
* @author treeroot b`^mpB*6R
* @since 2006-2-2 ?Lem|zo
* @version 1.0 Es&'c1$^s
*/ $yZ(ws
public class HeapSort implements SortUtil.Sort{ Q oWjC
w/wU~~
/* (non-Javadoc) 4EFP*7X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &!?qSi~V
*/ $ItPUYi";
public void sort(int[] data) { 7jPn6uz>w
MaxHeap h=new MaxHeap(); :Oc&{z?q
h.init(data); ?>iZ){0,
for(int i=0;i h.remove(); R]y9>5 'U
System.arraycopy(h.queue,1,data,0,data.length); 89fl\18%
} S%7%@Qs"%
1-}$sO c
private static class MaxHeap{ r'J3\7N!u
J Sms \
void init(int[] data){ 2KSt4oa
this.queue=new int[data.length+1]; s/OXZ<C|
for(int i=0;i queue[++size]=data; u`wT_?%w
fixUp(size); C44*qiG.
} ^ =RSoR
} EakS(Q?
oT^r
private int size=0; 9F|e.
l 5z8]/
private int[] queue; "yPKdwP
du^r EMb%
public int get() { l]mn4cn3
return queue[1]; aR0v qRF
} 33w(Pw
eo'C)j# U
public void remove() { b*o,re)Dj
SortUtil.swap(queue,1,size--); jAOD&@z1
fixDown(1); 1~9AQ[]w8
} ;aUI3n%
file://fixdown mG+hLRTXP
private void fixDown(int k) { l&m'?.gf
int j; WyJXT.
while ((j = k << 1) <= size) { ppPzI,
if (j < size %26amp;%26amp; queue[j] j++; )4bZ;'B5
if (queue[k]>queue[j]) file://不用交换 cP[]\r+Kj
break; }$1Aw%p^
SortUtil.swap(queue,j,k); Gq^#.o]
k = j; ai~JY[
} }NETiJ"6
} 8A|i$#.&
private void fixUp(int k) { Mta;6<
while (k > 1) { ]@7]mu:oL
int j = k >> 1; eZ +uW0
if (queue[j]>queue[k]) K7$Vl"l
break; eO=!(
SortUtil.swap(queue,j,k); U-GV^j
k = j; Nx"v|"
} JulxFjC
} _Rnq5y
Abf=b<bu
} a3oSSkT
m&Lc."
} kn|z
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SortUtil： X5eTj
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package org.rut.util.algorithm; N3g?gb"Ex)
QTjOLK$e$
import org.rut.util.algorithm.support.BubbleSort; !;YQQ<D
import org.rut.util.algorithm.support.HeapSort; 2\=cv
import org.rut.util.algorithm.support.ImprovedMergeSort; T+|V;nP.
import org.rut.util.algorithm.support.ImprovedQuickSort; 05m/iQ
import org.rut.util.algorithm.support.InsertSort; {cBLm/C
import org.rut.util.algorithm.support.MergeSort; Y4dTv<=K@i
import org.rut.util.algorithm.support.QuickSort; cP MUu9du
import org.rut.util.algorithm.support.SelectionSort; UT7".1H
import org.rut.util.algorithm.support.ShellSort; =m=utd8
Gg9NG`e6I
/** 7<VfE`Q3
* @author treeroot ~+Da`Wp
* @since 2006-2-2 wuTCdBu6hU
* @version 1.0 iiZK^/P$
*/ Q{Lsr,
public class SortUtil { xj!_]XJ^w
public final static int INSERT = 1; dSBW&-p
public final static int BUBBLE = 2; Ctxx.MM
public final static int SELECTION = 3; DeTZl+qm1E
public final static int SHELL = 4; SAGLLk07G
public final static int QUICK = 5; 8M;G@ Q80
public final static int IMPROVED_QUICK = 6; |_;Vb
public final static int MERGE = 7; 0\y@etb:mf
public final static int IMPROVED_MERGE = 8; c{t[iXDG
public final static int HEAP = 9; _A.?:'-
U"v}br-kb
public static void sort(int[] data) { c=p@l<)
sort(data, IMPROVED_QUICK); W[3)B(Vq<E
} kM\O2ay
private static String[] name={ tEl4 !vA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lYu1m
}; ;DKwv}
!&Q3>8l
private static Sort[] impl=new Sort[]{ $zBG19 [%
new InsertSort(), \HOOWaapN
new BubbleSort(), E$[\Fk}S
new SelectionSort(), S:"t]gbF =
new ShellSort(), %.R_[.W
new QuickSort(), ngN_,x7yc
new ImprovedQuickSort(), ZR'q.y[k)
new MergeSort(), U< p kg
new ImprovedMergeSort(), <`q|6XWL
new HeapSort() _k@{> ?(a
}; Q(KLx)
Wwf#PcC]
public static String toString(int algorithm){ 5i$~1ZC
return name[algorithm-1]; 41TB
} e+F5FAMR68
K/u`Wz~A
public static void sort(int[] data, int algorithm) { SS;QPWRZ
impl[algorithm-1].sort(data); FBcF
} yX(6C]D
%d9UWQ
public static interface Sort { $0Y&r]'
public void sort(int[] data); 0PnW|N0
} ~Rcd
z~xN]=
public static void swap(int[] data, int i, int j) { ?Ib/}JST
int temp = data; h tn2`
data = data[j]; t?]6>J_V
data[j] = temp; E `)p,{T
} ]Nvtiw 6
} 0n,5"B