[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; =oQzL
} 2jhVmK
int i1=l; 0[v:^H
int i2=mid+1; m/eGnv;!
for(int cur=l;cur<=r;cur++){ On'3K+(_
if(i1==mid+1) s=%HTfw
data[cur]=temp[i2++]; fykN\b
else if(i2>r) x *qef_Hu
data[cur]=temp[i1++]; xh-[]Jz(
else if(temp[i1] data[cur]=temp[i1++]; s`#hk^{
else :/~vaCZ
data[cur]=temp[i2++]; *0c }`|
} _23sIUN c3
} ;*Rajq
NWAF4i&$
} HO@T2t[
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改进后的归并排序: 2#(7,o}Y5
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package org.rut.util.algorithm.support; ;~1r{kXxA"
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import org.rut.util.algorithm.SortUtil; ~JZLfw
/yykOvUO
/** ZH0f32K
* @author treeroot N!h>fE`
* @since 2006-2-2 N"T8 Pt
* @version 1.0 %x927I>
*/ O]Kb~jkd
public class ImprovedMergeSort implements SortUtil.Sort { }TF<C!]
p9s~WD/K
private static final int THRESHOLD = 10; 25ayYO%PTc
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/* L}21[ N~ky
* (non-Javadoc) &R5M&IwL
* 3?O|X+$p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :mJM=FeJ
*/ $U8ap4EXM
public void sort(int[] data) { gx6&'${=#
int[] temp=new int[data.length]; `+f\Q2]Z
mergeSort(data,temp,0,data.length-1); _yoG<qI
} BphF+'CM
<>e<Xd:77{
private void mergeSort(int[] data, int[] temp, int l, int r) { W@ Z=1y
int i, j, k; X*JD
int mid = (l + r) / 2; Hug{9Hr3.
if (l == r) AN%.LK
return; 2ga}d5lu
if ((mid - l) >= THRESHOLD) RyhR#
mergeSort(data, temp, l, mid); xg^fM@#m
else b@X@5SJFW
insertSort(data, l, mid - l + 1); YpKai3 B
if ((r - mid) > THRESHOLD) \6'A^cE/PX
mergeSort(data, temp, mid + 1, r); ib&qH_r/
else xaS
insertSort(data, mid + 1, r - mid); v'>Yc#VJ
E, v1F!
for (i = l; i <= mid; i++) { l3afuD:
temp = data; xsTxc&0^
} As\5Ze9|
for (j = 1; j <= r - mid; j++) { c:6w >:
temp[r - j + 1] = data[j + mid]; qnS7z%H8
} 3>(`Y
int a = temp[l]; 9@1W=sl
int b = temp[r]; ~>C>LH>8
for (i = l, j = r, k = l; k <= r; k++) { *Qf}4a0
if (a < b) { 7wqwDE
data[k] = temp[i++]; #NE^f2
a = temp; *Vc=]Z2G^
} else { \'EWur"
data[k] = temp[j--]; !K 9(OX2;
b = temp[j]; EK#m?O:>
} yJL"uleRT
} p)jxqg
} AFFLnLA<L
}M7kApb>Y
/** Sy'>JHx
* @param data w7D:0SGD
* @param l 6,)y{/ENC
* @param i C5M-MZaS
*/ KCT8Q!\
private void insertSort(int[] data, int start, int len) { -,;Ep'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <^\r9Qxl
} \nHlI=!P
} :A'!u r=\
} <S}qcjG
} kW~F*
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堆排序： B1M/5cr.
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package org.rut.util.algorithm.support; @Y,F&8a$
Hj\~sR$L-
import org.rut.util.algorithm.SortUtil; aOHCr>po,
,$]q2aL
/** N93E;B
* @author treeroot _tk5?9Ykn
* @since 2006-2-2 vck$@3*
* @version 1.0 ) G{v>Z,
*/ zoJ;5a.3B
public class HeapSort implements SortUtil.Sort{ UIl_&|
TUaK:*x*
/* (non-Javadoc) [:QMnJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (*RybKoaA
*/ l(5-Cr
public void sort(int[] data) { t0>{0 5
MaxHeap h=new MaxHeap(); &~%@QC/
h.init(data); N>R%0m<e
for(int i=0;i h.remove(); ie(7m|.
System.arraycopy(h.queue,1,data,0,data.length); (<l2 ^H
} v'!Ntk
3+-(;>>\
private static class MaxHeap{ Q]wM/7
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void init(int[] data){ nIjQLx
this.queue=new int[data.length+1]; RFJ;hh
for(int i=0;i queue[++size]=data; FZ9<Q
fixUp(size); ^kr)U8
} W/>?1+r.Z
} iy]}1((hR
[hL1PWKs
private int size=0; !I[n|r"
7fay:_
private int[] queue; $vBU}~l7
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public int get() { m-89nOls
return queue[1]; 6p"c^
} hU 7fZl%yl
]M(mq`K
public void remove() { 9oP{Al
SortUtil.swap(queue,1,size--); *d@Hnu"q
fixDown(1); /[? F1Q
} ~vGtNMQg
file://fixdown =%\6}xPEl<
private void fixDown(int k) { EKPTDKut
int j; j7 =3\SO
while ((j = k << 1) <= size) { LJwMM
if (j < size %26amp;%26amp; queue[j] j++; M0SH-0T;Z
if (queue[k]>queue[j]) file://不用交换 pV6HQ:y1
break; 4w( vRe
SortUtil.swap(queue,j,k); Pm^N0L9?q
k = j; @;fE%N
} ~5NGDT#L*
} DOVX$N$3
private void fixUp(int k) { HF: T]n,
while (k > 1) { LUNs|\&
int j = k >> 1; Wi?%)hur
if (queue[j]>queue[k]) DME?kh>7
break; X-1Vp_(,TP
SortUtil.swap(queue,j,k); Z9&D'n)
k = j; c@-K
} Zd U{`>v
} 1Wk EPj,
K$cIVsfr
} g/,Bx!'8p
oqba:y;AR
} B bw1k
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SortUtil： 5TneuG[OD
1[BvHOI2
package org.rut.util.algorithm; lK,=`xe
6KCmswvE
import org.rut.util.algorithm.support.BubbleSort; `Kw"XGT
import org.rut.util.algorithm.support.HeapSort; 4E-A@FR
import org.rut.util.algorithm.support.ImprovedMergeSort; p@Y$eZ:O
import org.rut.util.algorithm.support.ImprovedQuickSort; &}0wzcMg
import org.rut.util.algorithm.support.InsertSort; TucAs0-bF
import org.rut.util.algorithm.support.MergeSort; 8Wx@[!
import org.rut.util.algorithm.support.QuickSort; Om2X>/V%C
import org.rut.util.algorithm.support.SelectionSort; .'b3iG&
import org.rut.util.algorithm.support.ShellSort; KVM@//:{
C9U{^
/** +;*(a3Gp
* @author treeroot 18"VB50b}
* @since 2006-2-2 Z'NbHwW}
* @version 1.0 D}/=\J/
*/ Hu9R.[u
public class SortUtil { lF8dRIav
public final static int INSERT = 1; o,Zng4NY
public final static int BUBBLE = 2; O*03PF^
public final static int SELECTION = 3; ]cqZ!4?_
public final static int SHELL = 4; z|]oM#Gt
public final static int QUICK = 5; !mxh]x<e
public final static int IMPROVED_QUICK = 6; o9LD6$
public final static int MERGE = 7; 1O2h9I$bk
public final static int IMPROVED_MERGE = 8; %DRy&k/T
public final static int HEAP = 9; tnF9Vj[#%_
mvA xx`jc
public static void sort(int[] data) { *:T>~ilF
sort(data, IMPROVED_QUICK); s`iNbW="
} <W51oO
private static String[] name={ ^q&wITGI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )fMX!#KP
}; \U*-w:+@
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private static Sort[] impl=new Sort[]{ gQh Ccv
new InsertSort(), reM
new BubbleSort(), cF&h$4-
new SelectionSort(), UW/3{2
new ShellSort(), Ac!&j=ZE
new QuickSort(), Kt90mA
new ImprovedQuickSort(), l?JO8^Nn
new MergeSort(), jqGo-C~
new ImprovedMergeSort(), 0"^oTmQN
new HeapSort() 9U<)_E<y
}; ah/6;,T
Hx2j=Q_dw
public static String toString(int algorithm){ vYSetAdv
return name[algorithm-1]; d0A\#H_&
} \ ~LU 'j
sK 1m9
public static void sort(int[] data, int algorithm) { [B~zoB(
impl[algorithm-1].sort(data); L.0} UXd
} :Q r7:$S^
P"=UI$HN
public static interface Sort { a4jnu:e
public void sort(int[] data); KBr5bcm4u
} Wt+y-ES
cUZ!;*
public static void swap(int[] data, int i, int j) { loC5o|Wh
int temp = data; 7c29Ua~[
data = data[j]; E7yf[/it
data[j] = temp; f1Yv hvWL
} 1V**QSZ1
} /SCZ&