[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; NND=Zxl
} !K3cf]2UD
int i1=l; -,A5^>}%,Y
int i2=mid+1; m'(;uR`
for(int cur=l;cur<=r;cur++){ j~S!!Z]
if(i1==mid+1) KBRg95E~]l
data[cur]=temp[i2++]; #K1BJ#KUt
else if(i2>r) *\:_o5o%[T
data[cur]=temp[i1++]; (g/X(3
else if(temp[i1] data[cur]=temp[i1++]; 5[2.5/
else AV 5\W}
data[cur]=temp[i2++]; O;e8ft '|
} AOx3QgC^NO
} FT/5 _1i
JX/4=..
} _#D\*0J
LL[#b2CKa
改进后的归并排序: EY&C[=
tP Efz+1N
package org.rut.util.algorithm.support; 7;}3{z
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import org.rut.util.algorithm.SortUtil; -Bo~"q
hRa(<ZK
/** W+f&%En
* @author treeroot -V u/TT0
* @since 2006-2-2 )=E~CpKV
* @version 1.0 ,J(5@8(>a
*/ T$^>Fiz{Se
public class ImprovedMergeSort implements SortUtil.Sort { $#7J\=GZ+
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private static final int THRESHOLD = 10; y{`(|,[
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/* 8yWu{'G
* (non-Javadoc) TjUZv1(L
* fAMD2C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,B~lwF9
*/ ;*-@OLT_K
public void sort(int[] data) { 45)ogg2
int[] temp=new int[data.length]; Ku/H=
mergeSort(data,temp,0,data.length-1); qbU1qF/
} j[/SXF\=
Oh/b?|imG
private void mergeSort(int[] data, int[] temp, int l, int r) { CaYos;Pl
int i, j, k; MLt'YW^
int mid = (l + r) / 2; U+*oI*
if (l == r) Z6R: rq
return; xQ#Akd=
if ((mid - l) >= THRESHOLD) (9KDtr*(2i
mergeSort(data, temp, l, mid); =(.mf
else Rnj Jg?I=
insertSort(data, l, mid - l + 1); 5]H))}9>d
if ((r - mid) > THRESHOLD) -4vHK!l
mergeSort(data, temp, mid + 1, r); YBtq0c
else "y~muE:.
insertSort(data, mid + 1, r - mid); "$W|/vD+
q: TT4MUj<
for (i = l; i <= mid; i++) { b=K6IX;
temp = data; 9iGE`1N%E
} Ld\LKwo
for (j = 1; j <= r - mid; j++) { 5 dfe@$
temp[r - j + 1] = data[j + mid]; N[,VSO&
} :kb1}Wu
int a = temp[l]; 8<yV
int b = temp[r]; ']ITuP8
for (i = l, j = r, k = l; k <= r; k++) { KUp
if (a < b) { T/GgF&i3
data[k] = temp[i++]; \)^,PA3
a = temp; 0q[p{_t`
} else { 8tLT'2+H#
data[k] = temp[j--]; {=bg5I0|a
b = temp[j]; ]&C:>
} <78$]Z2we
} Ha)3i{OM
} 3?.1~"-J
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/** R=vbUA
* @param data .DDg%z
* @param l lL(p]!K'
* @param i 3$?9uMl#
*/ ;|>q zx
private void insertSort(int[] data, int start, int len) { 0i8[=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !,Xyl} #
} 5)d,G9
} sf |oNOz
} 4_Qa=T8
} y+4?U
}BI~am_
堆排序： Wl& >6./{
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package org.rut.util.algorithm.support; <XQN;{xSa
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import org.rut.util.algorithm.SortUtil; :DtZ8$I`]C
cBz!U8(
/** ZnvEv;P
* @author treeroot V!T^wh;
* @since 2006-2-2 wr$cK'5ZL
* @version 1.0 BIxV|\k
*/ h8f!<:rTS
public class HeapSort implements SortUtil.Sort{ '1W!xQ}E
IajD;V
/* (non-Javadoc) MV"E?}0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @sc8}"J]#
*/ n-b>m7O(
public void sort(int[] data) { k{gl^
MaxHeap h=new MaxHeap(); 42rj6m\
h.init(data); fL ~1
for(int i=0;i h.remove(); A Gv!c($
System.arraycopy(h.queue,1,data,0,data.length); 0+T*$=?
} ZYE' C
\%sPNw=e
private static class MaxHeap{ AMbKN2h1f
DMF?5GX
void init(int[] data){ J[e}
this.queue=new int[data.length+1]; Ik`O.Q.}
for(int i=0;i queue[++size]=data; F(Lb8\to\M
fixUp(size); o3Mf:;2cC
} BZovtm3E
} k$ZRZ{ E+
)Rjb/3*!
private int size=0; 99<4t$KH
E%<w5d.lq
private int[] queue; v<L=!-b^
nd.57@*M
public int get() { ^I]LoG:
return queue[1]; P@qMJ}<j
} 7~_{.f
Yo>`h2C4
public void remove() { `wNm%*g
SortUtil.swap(queue,1,size--); ).pO2lLF4
fixDown(1); /8f>':zUb
} r?fH &u
file://fixdown h/,R{A2mO
private void fixDown(int k) { u@<Pu@?xm
int j; :lUX5j3
while ((j = k << 1) <= size) { K@B" ]6
if (j < size %26amp;%26amp; queue[j] j++; <^d!Vzr]
if (queue[k]>queue[j]) file://不用交换 cNe0x2Z$?
break; 6ayy[5tW
SortUtil.swap(queue,j,k); U z"sdi
k = j; ?n)Xw)]
} Z:K+I+:t
} }1 $hxfb
private void fixUp(int k) { + c`AE
while (k > 1) { M2}np
int j = k >> 1; Vwjk[ DOL
if (queue[j]>queue[k]) ov8 ByJc
break; ?Phk~ jE
SortUtil.swap(queue,j,k); 4w'lu"U
k = j; `,+#!)
} Z;#%t.
} "[k1D_PZ
ful#Px6m
} FC6xFg^
x Sv-;!y
} WrNLGkt
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SortUtil： KacR?Al
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package org.rut.util.algorithm; t{!/#eQC
)IQ*
import org.rut.util.algorithm.support.BubbleSort; VM7 !0
import org.rut.util.algorithm.support.HeapSort; $H'8 #:[d_
import org.rut.util.algorithm.support.ImprovedMergeSort; ^7.XGWQ)-
import org.rut.util.algorithm.support.ImprovedQuickSort; 1n_;kaY
import org.rut.util.algorithm.support.InsertSort; Bp :~bHf
import org.rut.util.algorithm.support.MergeSort; =-_)$GOI'
import org.rut.util.algorithm.support.QuickSort; <0#^7Z
import org.rut.util.algorithm.support.SelectionSort; ;(7-WnU8N
import org.rut.util.algorithm.support.ShellSort; HN{zT&
QIQfI05
/** 2Zy_5>~
* @author treeroot R~)ybf{
* @since 2006-2-2 nP<S6:s:
* @version 1.0 S.{fDcM
*/ K}x_nW
public class SortUtil { 1pK6=-3w3
public final static int INSERT = 1; ^K+:C;Q|
public final static int BUBBLE = 2; Jm4#V~w
public final static int SELECTION = 3; 5k]XQxc6_
public final static int SHELL = 4; [u`6^TycP
public final static int QUICK = 5; TXjloGv^
public final static int IMPROVED_QUICK = 6; 'TL2%T/)t
public final static int MERGE = 7; 9e!vA6Fx
public final static int IMPROVED_MERGE = 8; 9RH"d[%yc}
public final static int HEAP = 9; BWh}^3?l
:}Ok$^5s
public static void sort(int[] data) { OOokhZd`
sort(data, IMPROVED_QUICK); K1OkZ6kl
} r$ =qQ7^#
private static String[] name={ zN%97q_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @D~B{Hg
}; ,9d9_c.T
/%!~x[BeJ>
private static Sort[] impl=new Sort[]{ e'34Pw!m
new InsertSort(), Pe}PH I
new BubbleSort(), Di>rO038
new SelectionSort(), 2:Q(Gl`<l
new ShellSort(), ;\qXbL7
new QuickSort(), ?R|th Z
new ImprovedQuickSort(), W m . }Zh
new MergeSort(), }x:0os
new ImprovedMergeSort(), -p`L%xj\
new HeapSort() A?8\Y{FQ
}; *t(4 $
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public static String toString(int algorithm){ e`iEy=W
return name[algorithm-1]; :lgi>^
} Ow@v"L;jF!
EiWd+v,QJQ
public static void sort(int[] data, int algorithm) { $ KB
impl[algorithm-1].sort(data); )T1iN(Z
} }^Gd4[(,g
:_xh(W+2<
public static interface Sort { &$=!dA
public void sort(int[] data); */(I[p
} K*Ks"Vx
'H|~u&?
public static void swap(int[] data, int i, int j) { qM",( Bh
int temp = data; ]]2k}A[-I
data = data[j]; 5dl,co{q
data[j] = temp; QB&BTT=!
} l+[czb~
} vN65T$g7