[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; f32nO
} ]2+(i
int i1=l; O #"O.GX<
int i2=mid+1; BH^q.p_#>X
for(int cur=l;cur<=r;cur++){ VPuzu|
if(i1==mid+1) \}5\^&}_
data[cur]=temp[i2++]; &%<G2x$
else if(i2>r) ZZUCwczI
data[cur]=temp[i1++]; ?p]w_l
else if(temp[i1] data[cur]=temp[i1++]; (Y86q\DQ?|
else AiuF3`Xa
data[cur]=temp[i2++]; ]v#Q\Q8>
} uzOZxW[e
} ul E\>5O4h
9ZwhCsO
} Ru/3>n
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改进后的归并排序: a[!':-R`s
YGB|6p(
package org.rut.util.algorithm.support; %O-wMl
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import org.rut.util.algorithm.SortUtil; 0X;Dr-3<
xM(
/** G8@%)$A
* @author treeroot | =&r) ~
* @since 2006-2-2 pdM|dGq^
* @version 1.0 y9 "!ys
*/ zPn8>J<.0Q
public class ImprovedMergeSort implements SortUtil.Sort { 1-`8v[S
|dvcDx0|K
private static final int THRESHOLD = 10; sy~mcH:%+
oPi)#|jcb
/* Ty>`rn
* (non-Javadoc) ),86Y:^4
* Mw<1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9E+^FZe
*/ !|SawT5t
public void sort(int[] data) { r~X6qC
int[] temp=new int[data.length]; NGNn_1
mergeSort(data,temp,0,data.length-1); I>:'5V
} wx<DzC
K:y>wyzl
private void mergeSort(int[] data, int[] temp, int l, int r) { )s M}BY
int i, j, k; Q"KH!Bu%P
int mid = (l + r) / 2; f_}55?i0
if (l == r) |m~|
return; 0@2%pIq\
if ((mid - l) >= THRESHOLD) s`TfNwDvU
mergeSort(data, temp, l, mid); %gN8-~$1
else zk?lNs
insertSort(data, l, mid - l + 1); sD M!Uv2n
if ((r - mid) > THRESHOLD) &iTsuA/7
mergeSort(data, temp, mid + 1, r); rkVZP!7!
else JAYom%A"
insertSort(data, mid + 1, r - mid); +K&ze:-Z
hsi#J^n{
for (i = l; i <= mid; i++) { =fm/l-P@
temp = data; K}6}Opr,Tt
} _uDtRoI8
for (j = 1; j <= r - mid; j++) { @qeI4io-n
temp[r - j + 1] = data[j + mid]; !5ppA
} ?P}7AF A(W
int a = temp[l]; Q16RDQ*
int b = temp[r]; lgU7jn
for (i = l, j = r, k = l; k <= r; k++) { H}A67J9x
if (a < b) { zg]9~i8
data[k] = temp[i++]; 'EXp[*
a = temp; I\":L
} else { \;4RD$J
data[k] = temp[j--]; Xf:-K(%e
b = temp[j]; bBGLf)fsTG
} t1xX B^.M{
} Fm:Ri$iT
} P'zA=Rd&~>
97Whn*
/** k9a-\UIMet
* @param data VEJ Tw
* @param l *T 6<'a
* @param i jQc$>M<"o
*/ @A g=2\9
private void insertSort(int[] data, int start, int len) { /|Zk$q.\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H`kfI"u8
} M>-x\[n+
} yhZ2-*pTg
} hD sFsG
} "zfy_h
s3oK[:/
堆排序： !s5 _JO
:Z,zWk1|
package org.rut.util.algorithm.support; lBl`R|Gt
eR?`o!@y
import org.rut.util.algorithm.SortUtil; +hi!=^b]
hCM+=]z"
/** J-b Z`)[Q
* @author treeroot %G>*Pez%
* @since 2006-2-2 $33wK
* @version 1.0 wTqgH@rGtR
*/ Ymx/N+Jl
public class HeapSort implements SortUtil.Sort{ *&!&Y*Jzg
T2GJoJ!
/* (non-Javadoc) U",kAQY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {o AJL
*/ o[aRG7C
public void sort(int[] data) { fE,\1LK4
MaxHeap h=new MaxHeap(); ^k/@y@%
h.init(data); dCN4aY[d
for(int i=0;i h.remove(); kowBB0
System.arraycopy(h.queue,1,data,0,data.length); G8H=xr#
} </Ja@%
|G }qY5_
private static class MaxHeap{ 5Q =o.wf
|}=xA%)
void init(int[] data){ bt"*@NJ$
this.queue=new int[data.length+1]; Iy'a2@
for(int i=0;i queue[++size]=data; x+47CDDu3
fixUp(size); rdSkGb
} C,&r7
} FZO}+ P
5V]!xi
private int size=0; WQK ~;GV-
7;5SK:X%dm
private int[] queue; Xnpw'<~X
d=yuuS/
public int get() { 22(7rUkI
return queue[1]; =HH}E/9z
} s: pmB\
.liVlo@
public void remove() { YH@p\#Y
SortUtil.swap(queue,1,size--); <BEM`2B
fixDown(1); /{|JQ'gqX
} ,'Zs")Ydp
file://fixdown V\vt!wBcB
private void fixDown(int k) { IZn|1X?}\s
int j; IN~Q(A]Z%
while ((j = k << 1) <= size) { E:(DidSE@
if (j < size %26amp;%26amp; queue[j] j++; \W4|.[
if (queue[k]>queue[j]) file://不用交换 @vs+)aRa
break; tFn_{fCc>
SortUtil.swap(queue,j,k); plN:QS$
k = j; lp+Uox
} N"L@
} 9bwG3jn4?
private void fixUp(int k) { 8`Ih> Dc
while (k > 1) { QbrR=[8b
int j = k >> 1; [3o^06V8j
if (queue[j]>queue[k]) #%5[8~&
break; 0w<vc}{t
SortUtil.swap(queue,j,k); &P'd&B1
k = j; 6 b-'Hui+
} wkc)2z
} z>}H[0[#
Y#7sDd!N|
} =jz [}5
)jm!bR`
} N.(wR
b v5BV
SortUtil： 4z6kFQgu
|q!O~<H@
package org.rut.util.algorithm; QN)EPS:y
Q!.JV.(
import org.rut.util.algorithm.support.BubbleSort; xU9T8Lw
import org.rut.util.algorithm.support.HeapSort; 5d|hP4fEc
import org.rut.util.algorithm.support.ImprovedMergeSort; fkk&pu
import org.rut.util.algorithm.support.ImprovedQuickSort; 2:GS(%~
import org.rut.util.algorithm.support.InsertSort; t[}&*2"$/
import org.rut.util.algorithm.support.MergeSort; I'[gGK4F
import org.rut.util.algorithm.support.QuickSort; XN|[8+#U<@
import org.rut.util.algorithm.support.SelectionSort; '8Wu9 phT
import org.rut.util.algorithm.support.ShellSort; mH6\8I
x<d2/[(}mT
/** C@b-)In
* @author treeroot W<Ri(g-
* @since 2006-2-2 VRE[vM'
* @version 1.0 v-(dh5e` H
*/ PJ-g.0q
public class SortUtil { uidoz f2}
public final static int INSERT = 1; n~_;tO
public final static int BUBBLE = 2; 6 H{G$[2
public final static int SELECTION = 3; nOTe 3?i>
public final static int SHELL = 4; gUGMoXSTI|
public final static int QUICK = 5; f9$8$O
public final static int IMPROVED_QUICK = 6; o*_arzhA
public final static int MERGE = 7; Be;l!]i
public final static int IMPROVED_MERGE = 8; Y+)qb);
public final static int HEAP = 9; 40=*Ul U-
*{x8@|K8
public static void sort(int[] data) { 7/e25LS!`U
sort(data, IMPROVED_QUICK); $&Lw 2 c0
} <]Btx;}
private static String[] name={ B}fd#dr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Fzmc#?
}; _*wkTI+j
/`s{!t#Y
private static Sort[] impl=new Sort[]{ aO&!Y\=@
new InsertSort(), yByxy-~
new BubbleSort(), Mh"iyDGA
new SelectionSort(), <H,E1kGw9
new ShellSort(), bUU\bc
new QuickSort(), k|4}Do%;
new ImprovedQuickSort(), }y>/#]X
new MergeSort(), yU|=)p5
new ImprovedMergeSort(), fL(_V/p^
new HeapSort() Q3<ctd\]Y
}; l3N '@GO
dt5`UBvUg
public static String toString(int algorithm){ UX24*0`\~
return name[algorithm-1]; d~qZ;uw
} \)M EM=U
6DVHJ+WTV
public static void sort(int[] data, int algorithm) { ?G>E[!8ev
impl[algorithm-1].sort(data); blx"WVqo
} B,b^_4XX$
c8h71Cr
public static interface Sort { BN1,R] *;
public void sort(int[] data); +?'a2pUS
} o%E-K=a
E>c*A40=.n
public static void swap(int[] data, int i, int j) { pnpf/T{xpM
int temp = data; R+# g_"1@p
data = data[j]; +!/pzoWpE
data[j] = temp; BD2Gv)?g
} d1}cXSQ1T
} >)t-Zh:n