[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; PG]%Bv57
} Gx 72
int i1=l; WW@d:R
int i2=mid+1; rP(eva
for(int cur=l;cur<=r;cur++){ Ou>vX[{
if(i1==mid+1) )}L??|#
data[cur]=temp[i2++]; BJS-Jy$-
else if(i2>r) ~j'l.gQb
data[cur]=temp[i1++]; 1+7GUSIb
else if(temp[i1] data[cur]=temp[i1++]; \`w4|T
else u(!&:A9JFd
data[cur]=temp[i2++]; oW;6h.
} ]LZ`LL'#Y_
} k;5Pom
o-cAG{.WC
} g_Im;1$
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改进后的归并排序: %AW4.3()8
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package org.rut.util.algorithm.support; "+uNmUUnm
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import org.rut.util.algorithm.SortUtil; > MG>=A
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/** "3F;cCDv]
* @author treeroot OD=!&LM
* @since 2006-2-2 #pHs@uvO
* @version 1.0 _U{&@}3
*/ &J!aw
public class ImprovedMergeSort implements SortUtil.Sort { 6q>+!kXh
7zTqNnPnf
private static final int THRESHOLD = 10; p*l$Wj
Xe+,wW3YF
/* n$(p-po
* (non-Javadoc) |*mL1#bB
* Xes|[*Y!V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |7@O($b
*/ AddeaB5<
public void sort(int[] data) { ejXMKPE;
int[] temp=new int[data.length]; *U#m+@\0
mergeSort(data,temp,0,data.length-1); ~3RC>8*Qw
} ]Zf6Yw.Y
Q# ?wXX47
private void mergeSort(int[] data, int[] temp, int l, int r) { q_Lo3|t i
int i, j, k; nmjm<Bu
int mid = (l + r) / 2; 8I,QD` xu
if (l == r) (3dPLp:K
return; m%#`y\]I
if ((mid - l) >= THRESHOLD) j'p1q
mergeSort(data, temp, l, mid); +([!A6:
else `)4a[thp
insertSort(data, l, mid - l + 1); n,O5".aa<
if ((r - mid) > THRESHOLD) 6> {r6ixs1
mergeSort(data, temp, mid + 1, r); \.gEh1HW
else :"o o>
insertSort(data, mid + 1, r - mid); 8p1ziz`4>$
k8]O65t|
for (i = l; i <= mid; i++) { =iHiPvP0
temp = data; Fd\e*ww'
} Vc3mp;6"
for (j = 1; j <= r - mid; j++) { gX5&d\y
temp[r - j + 1] = data[j + mid]; z{]?h cY
} n+1y
int a = temp[l]; Qju`e Eo
int b = temp[r]; V^il$'
for (i = l, j = r, k = l; k <= r; k++) { -p-0;Hy
if (a < b) { ->lu#;A5
data[k] = temp[i++]; H g5++.Bp
a = temp; e1q"AOV6
} else { A 699FQ
data[k] = temp[j--]; B8I4[@m>w\
b = temp[j]; SNT5Amz!
} zX7q:Pt
} )$x_!=@1
} $(q>mg:H
y0ckm6^
/** P|jF6?C
* @param data =GR'V
* @param l Dmdy=&G
* @param i 8n?kZY$,
*/ 9j|gdfb%ml
private void insertSort(int[] data, int start, int len) { %zo= K}u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l+y-Fo@
} 34|a:5c
} AN9[G
} l)+:4N?iVv
} .>6 Wv0
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堆排序： @\Js8[wS9@
+K6szGP
package org.rut.util.algorithm.support; #NRh\Wj|
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import org.rut.util.algorithm.SortUtil; /2NSZO
s.jO<{
/** D!TZI
* @author treeroot l*7?Y7FK
* @since 2006-2-2 +'03>!V
* @version 1.0 K6pR8z*?
*/ vi {uy
public class HeapSort implements SortUtil.Sort{ CV.+P-
_`a&9i &
/* (non-Javadoc) .gYt0raSY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '5H4z7)
*/ K3p@$3hQ
public void sort(int[] data) { +3^NaY`Y
MaxHeap h=new MaxHeap(); I+,SZ]n
h.init(data); %c6E-4b
for(int i=0;i h.remove(); So4nJ><p
System.arraycopy(h.queue,1,data,0,data.length); ulXnq`
} Yr&Ka:
8V5a%2eV
private static class MaxHeap{ C9KWa*3
]HvZ$
void init(int[] data){ 7!2 HNg
this.queue=new int[data.length+1]; =l`OHTg
for(int i=0;i queue[++size]=data; hG Apuy
fixUp(size); M$&>5n7
} #s+X+fe
} E8-53"m
YL5>V$i
private int size=0; y@apJ;_R-
v:d9o.h
private int[] queue; ^@.G,u
Gq]d:-7l
public int get() { ]h~o],:
return queue[1]; D[>W{g $
} ^9ng)
M#0 @X
public void remove() { 7U:=~7GH
SortUtil.swap(queue,1,size--); 6[==BbZ
fixDown(1); ,d 7Z
} +8^_D?*\n
file://fixdown ^g!B.ll`
private void fixDown(int k) { vg^Myn
int j; :)P<jX-G
while ((j = k << 1) <= size) { ,$Tk$
if (j < size %26amp;%26amp; queue[j] j++; Vm!i
if (queue[k]>queue[j]) file://不用交换 eoJ]4-WFq
break; cgyo_ k
SortUtil.swap(queue,j,k); 4 iH&:Al
k = j; wOHEv^,
} .s};F/(diD
} dERc}oAh(
private void fixUp(int k) { *bZ\@Qm
while (k > 1) { #AncOo
int j = k >> 1; `-D$Fsl
if (queue[j]>queue[k]) VG#Q;Xd}
break; V.,bwPb{9
SortUtil.swap(queue,j,k); K+mU_+KRp
k = j; @}eNV~ROu
} R{<Y4C2~
} BLW]|p|1:
]p$zvMf}
} \GHOg.P
~hD{coVTI
} C ktX0
.;slrg(5F
SortUtil： Ed=}PrE
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package org.rut.util.algorithm; [.U^Wrd
!`C%Fkq
import org.rut.util.algorithm.support.BubbleSort; e\~l!f'z
import org.rut.util.algorithm.support.HeapSort; {8ECNQ[]
import org.rut.util.algorithm.support.ImprovedMergeSort; cQ,9Rnfl,
import org.rut.util.algorithm.support.ImprovedQuickSort; ;o >WXw
import org.rut.util.algorithm.support.InsertSort; @ta?&Qf)
import org.rut.util.algorithm.support.MergeSort; 6z]`7`G
import org.rut.util.algorithm.support.QuickSort; %O/d4
import org.rut.util.algorithm.support.SelectionSort; ~'[jBn)
import org.rut.util.algorithm.support.ShellSort; 3M$X:$b
X2P``YFV{
/** {_as!5l
* @author treeroot b_ JWnh
* @since 2006-2-2 bm6hZA|
* @version 1.0 <_f`$z
*/ vXf:~G]
public class SortUtil { (txt8q
public final static int INSERT = 1; i+RD]QL
public final static int BUBBLE = 2; 'Q`C[*c
public final static int SELECTION = 3; ^;64!BaK
public final static int SHELL = 4; h60\ Y 8
public final static int QUICK = 5; -eq=4N=s
public final static int IMPROVED_QUICK = 6; uWrFunh%
public final static int MERGE = 7; }s6G!v^2""
public final static int IMPROVED_MERGE = 8; ;/aB)JZ5=
public final static int HEAP = 9; +3HPA#A
Gt5$6>A
public static void sort(int[] data) { @tQ2E}psP,
sort(data, IMPROVED_QUICK); e/P4mc)
} Q;@X2JSp
private static String[] name={ O3&|}:<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =g[H]-Ee
}; {]@Qu"M
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private static Sort[] impl=new Sort[]{ 9;pzzZ
new InsertSort(), ^Yr|K
new BubbleSort(), IrUi Eq
new SelectionSort(), b.,$# D{p
new ShellSort(), L"9 Gc
new QuickSort(), 1)gv%_
new ImprovedQuickSort(), +/}_%Cf8
new MergeSort(), 7p !zp9|
new ImprovedMergeSort(), H-m`Dh5{
new HeapSort() &]*|6cR$E
}; aa!a&L|!
`%%?zgY
public static String toString(int algorithm){ sM0c#YK?
return name[algorithm-1]; Kv1vx*>
} s8yCC#H"
XX:q|?6_ 4
public static void sort(int[] data, int algorithm) { v2(U(Tt
impl[algorithm-1].sort(data); R;.d/U|av
} o6:45
ha5 bD%
public static interface Sort { GP Ix@k
public void sort(int[] data); ?{n>EvLY
} wYa0hNd
"u,sRbL
public static void swap(int[] data, int i, int j) { tw]/,>\G
int temp = data; {QW-g
data = data[j]; $xQ"PJ2
data[j] = temp; ]|;7R^o3|
} u8xk]:%
} IF& PGo