[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; 4,&f#=Y
} ?jsgBol
int i1=l; w^ X@PpP
int i2=mid+1; fjMmlp
for(int cur=l;cur<=r;cur++){ NOFH
if(i1==mid+1) 7e[&hea
data[cur]=temp[i2++]; bduHYs+rq
else if(i2>r) L=5Y^f'aU
data[cur]=temp[i1++]; |+Xh ^E
else if(temp[i1] data[cur]=temp[i1++]; +fHqGZ]
else Y=/;7T
data[cur]=temp[i2++]; \0)2 u[7
} TpYdIt9#>
} J&L#^f*d
a_zf*;
} \SBAk h
2gW+&5;4
改进后的归并排序: z3M6<.K
L?(m5u~b
package org.rut.util.algorithm.support; N_p^DP
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import org.rut.util.algorithm.SortUtil; !N/?b^y
&-KQ m20n
/** LAGg(:3f3
* @author treeroot i x_a
* @since 2006-2-2 6-\C?w A
* @version 1.0 UdFYG^i
*/ 3=_to7]
public class ImprovedMergeSort implements SortUtil.Sort { d3p;[;`
xw3A|Aj?r
private static final int THRESHOLD = 10; mFyYn,Mu|
!/Wv\qm
/* Mvk#$:8e
* (non-Javadoc) {/XU[rn
* nN(Q}bF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2'WdH1UrBc
*/ nVk]Qe
public void sort(int[] data) { 7T?7KS
int[] temp=new int[data.length]; `4"&_ltD
mergeSort(data,temp,0,data.length-1); NmV][0(BS
} u"zQh|
fG /wU$B
private void mergeSort(int[] data, int[] temp, int l, int r) { Ay\!ohIS3
int i, j, k; W97 &[([
int mid = (l + r) / 2; l5_%Q+E_
if (l == r) V__n9L/t
return; D 3}e{J8
if ((mid - l) >= THRESHOLD) }{e7wqS$&,
mergeSort(data, temp, l, mid); ]TKM.[[
else Vt U
insertSort(data, l, mid - l + 1); mQt?d?6
if ((r - mid) > THRESHOLD) .g6(07TyV
mergeSort(data, temp, mid + 1, r); d*<goBd
else +yu^Z*_
insertSort(data, mid + 1, r - mid); LL=nMoS
)IZ~!N|-w
for (i = l; i <= mid; i++) { yO09NQ 5u
temp = data; 5P < F
} pmi`Er
for (j = 1; j <= r - mid; j++) { @T+pQ)0{{
temp[r - j + 1] = data[j + mid]; %Tv^BYQAZ
} y-CVyl
int a = temp[l]; }!g^}BWWp
int b = temp[r]; {!vz 6QDS
for (i = l, j = r, k = l; k <= r; k++) { We,~P\g
if (a < b) { qbe9 CF'@_
data[k] = temp[i++]; G!IJ#|D:~
a = temp; )|@UY(VZ^
} else { {pNf&'
data[k] = temp[j--]; 2*1s(Jro
b = temp[j]; G#A& Y$
} c/E6}OWA
} U0W- X9>y
} I~>L4~g)
Px))O&w{
/** \ >(;t#>
* @param data tJ9i{TS
* @param l `Z0#IeX=
* @param i fX2PteA0qX
*/ OVm $
private void insertSort(int[] data, int start, int len) { 7)Rx-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -*EK-j
} [UHDN:y
} K}U}h>N
} j@b4)t
} O5Xu(q5+
Y?z@)cL
堆排序： 8vcV-+x
/IC7q?avQN
package org.rut.util.algorithm.support; &@xixbg
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import org.rut.util.algorithm.SortUtil; ,]'?Gd
n(b(H`1n
/** ~o+HAc`=v
* @author treeroot Z?5kO-[
* @since 2006-2-2 TK;*:K8oe
* @version 1.0 Nd~?kZZu
*/ g(Jzu'
public class HeapSort implements SortUtil.Sort{ 5B?>.4R
i(JBBE"
/* (non-Javadoc) "Kz=ZC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0*"auGuX
*/ 0f 1Lu) 2
public void sort(int[] data) { P.RlozF5;
MaxHeap h=new MaxHeap(); 0=;jGh}|i
h.init(data); 31y=Ar""
for(int i=0;i h.remove(); EW{z?/
System.arraycopy(h.queue,1,data,0,data.length); >yn%.Uoh@
} Wr7^
:xfD>K
private static class MaxHeap{ 9/MUzt
tqIz$84G
void init(int[] data){ ZN|DR|cUY
this.queue=new int[data.length+1]; {hX.R
for(int i=0;i queue[++size]=data; %lchz/
fixUp(size); a4X J0Tm
} mk1;22o{TX
} vt[4"eU
5,'?NEyw
private int size=0; \@Gyl_6^
/!UuGm
private int[] queue; W?G4\ubM3<
l'VgS:NT
public int get() { [syuoJ
return queue[1]; [zK|OMxoV
} *L/_ v
46*o_A,"
public void remove() { mUzNrkG(G
SortUtil.swap(queue,1,size--); xUPM-eF=
fixDown(1); ` &|Rs
} dx[<@f2c
file://fixdown :N%cIxrqP
private void fixDown(int k) { 52tIe|KwL
int j; qI<6% ^i
while ((j = k << 1) <= size) { FqQm*k_
if (j < size %26amp;%26amp; queue[j] j++; yEtSyb~GK
if (queue[k]>queue[j]) file://不用交换 /9|1eSUa
break; tz&=v,_jc
SortUtil.swap(queue,j,k); 8^$}!9B~JZ
k = j; PX[taDN
} Rs{L
} x';6
private void fixUp(int k) { *(s+u~, I
while (k > 1) { 2;5EH0
int j = k >> 1; !~m)_Q5?~
if (queue[j]>queue[k]) w]UYD;f
break; 7s,IT8ii
SortUtil.swap(queue,j,k); Dz]&|5'N
k = j; .jZmQtc
} P 5m{}@g
} 4/S4bk*8
Yp./3b VO
} HW"|Hm$Y(
,JN2q]QPP
} #SQT!4
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SortUtil： ['sj'3cW-
Va\dMv-b
package org.rut.util.algorithm; 3@J0-w
j=r`[Bm
import org.rut.util.algorithm.support.BubbleSort; ,<zGvksk
import org.rut.util.algorithm.support.HeapSort; b~Op1p
import org.rut.util.algorithm.support.ImprovedMergeSort; 5.]+K<:h"A
import org.rut.util.algorithm.support.ImprovedQuickSort; E08FUAth]#
import org.rut.util.algorithm.support.InsertSort; cTHSPr?<
import org.rut.util.algorithm.support.MergeSort; rC14X}X6
import org.rut.util.algorithm.support.QuickSort; 5CueD]
import org.rut.util.algorithm.support.SelectionSort; Y]P';C_eP
import org.rut.util.algorithm.support.ShellSort; ?5Wjy
4v33{sp
/** 1LZ?!Lw
* @author treeroot '+?AaR&p?
* @since 2006-2-2 ,@tkL!"9q
* @version 1.0 ]U!vZY@\
*/ X,IjM&o"Y
public class SortUtil { ?FVX &{{V
public final static int INSERT = 1; w0)V3
public final static int BUBBLE = 2; MGfDxHg]
public final static int SELECTION = 3; @H= d8$
public final static int SHELL = 4; oN)l/"%C7/
public final static int QUICK = 5; h8Q+fHDYv
public final static int IMPROVED_QUICK = 6; s:7^R-"
public final static int MERGE = 7; Gi~p-OS,
public final static int IMPROVED_MERGE = 8; b4Br!PL@G
public final static int HEAP = 9; !jN}n)FSq
}=z_3JfO
public static void sort(int[] data) { ^ llZf$`
sort(data, IMPROVED_QUICK); f_}/JF
} <gF=$u|}3[
private static String[] name={ I@+h| n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9h>nP8
}; QG*=N {%5
CL.JalR`b
private static Sort[] impl=new Sort[]{ btHN
new InsertSort(), B8UtD
new BubbleSort(), |iKk'Rta4
new SelectionSort(), _ui03veA1
new ShellSort(), +~?ze,Di
new QuickSort(), cjAKc|NJ
new ImprovedQuickSort(), <cNXe4(
new MergeSort(), X1&Ug^
new ImprovedMergeSort(), ,(dg]7
new HeapSort() gyj.M`+y
}; fOJ0#^Z
<f.*=/]W2
public static String toString(int algorithm){ #"-?+F=rk
return name[algorithm-1]; 0<_|K>5dS|
} "X0"=1R~
Wt4ROj
public static void sort(int[] data, int algorithm) { NAjY,)>'K
impl[algorithm-1].sort(data); ma9q?H#X
} XI:8_F;Q
tvXoF;Yq
public static interface Sort { ph{p[QI:{X
public void sort(int[] data); z%$ E6Im
} }/&Q\Sc
VN[C%C
public static void swap(int[] data, int i, int j) { e8g"QDc
int temp = data; bwo-9B
data = data[j]; WA}<Zme3[
data[j] = temp; u$ C@0d
} Atsi}zTR\
} Ck;O59A"&-