[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; $^W|@et{ ]
} [V0%=q+R
int i1=l; 3C2~heO>|
int i2=mid+1; TrBtTqH)
for(int cur=l;cur<=r;cur++){ X&!($*/
if(i1==mid+1) S~GS:E#
data[cur]=temp[i2++]; ?Xqkf>
else if(i2>r) R%Xz3Z&|
data[cur]=temp[i1++]; ZsGJ[
else if(temp[i1] data[cur]=temp[i1++]; -90X^]
else %/RT}CBBsW
data[cur]=temp[i2++]; hjp,v)#
} m21H68y
} cZAf?,>u
v=-T3 n
} ePTxuCf>
>vNE3S_
改进后的归并排序: $Eo-58<q
s2 $w>L
package org.rut.util.algorithm.support; 2=X.$&a
t5EYu*
import org.rut.util.algorithm.SortUtil; [\=1|t5n~
}q:4Zh'l!
/** (1%A@4
* @author treeroot H~W=#Cx
* @since 2006-2-2 GsIqUM#R
* @version 1.0 JY$;m3h
*/ JC7:0A^
public class ImprovedMergeSort implements SortUtil.Sort { H)5"<=]
?F|F~A8dr
private static final int THRESHOLD = 10; 5zH_yZ@+
3/8<dc
/* Y5<W"[B!
* (non-Javadoc) :%IB34e
* ^-(DokdBn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8#RL2)7Uy`
*/ 4C9k0]k2
public void sort(int[] data) { 6e"Lod_ L
int[] temp=new int[data.length]; ,m5tO
mergeSort(data,temp,0,data.length-1); Bm&6
} 5]2 p>%G
i.e4<|{
private void mergeSort(int[] data, int[] temp, int l, int r) { 4 Z&KR<2Z
int i, j, k; seZb;0
int mid = (l + r) / 2; mH )i
if (l == r) Lg|]|,%e
return; SxL/]jWR7
if ((mid - l) >= THRESHOLD) :13u{5:th
mergeSort(data, temp, l, mid); V/yj.aA*@
else Sea6xGdq
insertSort(data, l, mid - l + 1); Nu+DVIM
if ((r - mid) > THRESHOLD) z]!w@:
mergeSort(data, temp, mid + 1, r); i~rb-~o
else !'>,37()
insertSort(data, mid + 1, r - mid); +(h{3Y|
$rPQ%2eF4
for (i = l; i <= mid; i++) { 9yj'->dL
temp = data; XjTu`?Na;
} Xl E0oN~{
for (j = 1; j <= r - mid; j++) { -a7BVEFts
temp[r - j + 1] = data[j + mid]; q<4{&omUJ
} }bnodb^.7
int a = temp[l]; 4TSkm`iR
int b = temp[r]; 8I0G%hD
for (i = l, j = r, k = l; k <= r; k++) { ."ytBF
if (a < b) { }+K=>.
data[k] = temp[i++]; k{cPiY^
a = temp; dyB@qh~H
} else { i$CF*%+t
data[k] = temp[j--]; ;dTxQ_:
b = temp[j]; bl#6B.*=
} %Hu.FS5'
} }l_8~/9
} n'!x"O7
Au*1-
/** c~!ETwpHQ
* @param data .>Fpk7
* @param l 877Kv);
* @param i pMoza8
*/ ;&MnPFmq
private void insertSort(int[] data, int start, int len) { `k(m2k?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kv<(N
} Asj<u!L
} X#o;`QM
} _.SpU`>/f
} [<nd+3E
)-25?B
堆排序： `tl-] ^Y2
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package org.rut.util.algorithm.support; qf{HGn_9~1
'30JJ0
import org.rut.util.algorithm.SortUtil; w^}*<q\
2%)~E50U
/** @)@tIhw
* @author treeroot =]1g*~%
* @since 2006-2-2 Ho $+[K
* @version 1.0 kH4m6p
*/ fr&p0)85>B
public class HeapSort implements SortUtil.Sort{ j_S3<wEJ
*E-MJCv
/* (non-Javadoc) =FfR?6 ~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W3n[qVZIC
*/ <]*Jhnx/
public void sort(int[] data) { \8USFN~(Y
MaxHeap h=new MaxHeap(); Is9.A_0h
h.init(data); 38%"#T3#
for(int i=0;i h.remove(); 7?\r9bD
System.arraycopy(h.queue,1,data,0,data.length); "+hUt
} fyxc4-D
^1Bk*?Yx\x
private static class MaxHeap{ y(=0
|7!Bk$(vA
void init(int[] data){ $)'LbOe
this.queue=new int[data.length+1]; qos/pm$&i
for(int i=0;i queue[++size]=data; BRv#`
fixUp(size); CjJ n
} Sp]ov:]%f
} Y@+9Ukd/
[YJ*zO
private int size=0; u\km_e
U@:l~xJ
private int[] queue; <"av /`;
@.pr}S/
public int get() { #;UoZJ B
return queue[1]; WN o+%
} &iT^IkA{
&uI33=
public void remove() { ER:K^ Za
SortUtil.swap(queue,1,size--); 1+Vei<H$
fixDown(1); Bo ??1y
} 1/SB[[g
file://fixdown `!ZkWF6
private void fixDown(int k) { SRrp=>w?
int j; etk|%%J
while ((j = k << 1) <= size) { M`xI N~
if (j < size %26amp;%26amp; queue[j] j++; +y][s{A
if (queue[k]>queue[j]) file://不用交换 8DFq eY0S
break; ,/[1hhP@
SortUtil.swap(queue,j,k); Uh^j;s\y
k = j; E&Sr+D aPD
} f|2QI~R
} ?S.LGc
private void fixUp(int k) { 2(R{3E4.
while (k > 1) { 2t7=GA+j
int j = k >> 1; ZQmg;L&7
if (queue[j]>queue[k]) {<i(aq?
break; rEs!gGNN
SortUtil.swap(queue,j,k); d!"gb,ec
k = j; " pL5j
} !0cb f&^:
} ryTtGx%a
#?~G\Ux0/
} T? ,Q=.
;!EEzR.
} o^u}(wZ{
:BblH0'
SortUtil： U)1hC^[!
C6d#+
package org.rut.util.algorithm; 8,:lw3x1
?y^ ix+M
import org.rut.util.algorithm.support.BubbleSort; )(yKm/50
import org.rut.util.algorithm.support.HeapSort; Ua+Us"M3}
import org.rut.util.algorithm.support.ImprovedMergeSort; yRz l}
import org.rut.util.algorithm.support.ImprovedQuickSort; &p=(0$0&-
import org.rut.util.algorithm.support.InsertSort; Vtk}>I@%
import org.rut.util.algorithm.support.MergeSort; 0:eK}tC
import org.rut.util.algorithm.support.QuickSort; QtOT'<2t]
import org.rut.util.algorithm.support.SelectionSort; ;$UB@)7%
import org.rut.util.algorithm.support.ShellSort; dkZ[~hEQG-
Qq\hD@Z|
/** ^1XnnQa
* @author treeroot (-{.T
* @since 2006-2-2 'he&h4fm
* @version 1.0 5~"m$/yE
*/ ['I5(M@
public class SortUtil { lV?OYS|4i
public final static int INSERT = 1; D+*_iM6[-
public final static int BUBBLE = 2; T7*p!0
public final static int SELECTION = 3; j7C&&G q
public final static int SHELL = 4; !3o]mBH8
public final static int QUICK = 5; WQHlf0]
public final static int IMPROVED_QUICK = 6; MUp{2_RA
public final static int MERGE = 7; I@q4D1g
public final static int IMPROVED_MERGE = 8; AaJz3oncJ
public final static int HEAP = 9; =7zvp,B
_i0,?U2C
public static void sort(int[] data) { z4(Q.0x7
sort(data, IMPROVED_QUICK); Yk5Cyq
} -[7S.
private static String[] name={ ( z.\,M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n^rzl6dy
}; +Z/aG k;
*l'5z)]
private static Sort[] impl=new Sort[]{ y;tX`5(fe
new InsertSort(), "@&I*1&
new BubbleSort(), |z.Ov&d4)(
new SelectionSort(), =bb)B(
new ShellSort(), -[>G@m:?e
new QuickSort(), gOn^}%4.I
new ImprovedQuickSort(), 2L?Pw
new MergeSort(), W sDFui
new ImprovedMergeSort(), UC?i>HsJrX
new HeapSort() ~H`(zzk
}; c+]5[6
'U4@Sax,
public static String toString(int algorithm){ H,U qU3b3
return name[algorithm-1]; RhumNP<M
} i^6g1"h
1EA}[x
public static void sort(int[] data, int algorithm) { 2]-xmS>|b
impl[algorithm-1].sort(data); "?Xb$V7
} -'::$ {
Y1U\VU
public static interface Sort { T~-PT39E
public void sort(int[] data); #6qLu
} ~bSjZ1`
Ed&M
public static void swap(int[] data, int i, int j) { EyPF'|Qtn
int temp = data; <!.Qn Y
data = data[j]; 1N\-Ku
data[j] = temp; &io*pmUm6
} ^1w*$5YI
} he1W22