[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; fTA%HsvU:
} 32):&X"AIh
int i1=l; qr7_3
int i2=mid+1; q%}54E80
for(int cur=l;cur<=r;cur++){ +p)kemJ~
if(i1==mid+1) @X0$X+]E*8
data[cur]=temp[i2++]; H52] Zm
else if(i2>r) 3sBu`R*hk
data[cur]=temp[i1++]; s$OnQc2/
else if(temp[i1] data[cur]=temp[i1++]; \Ot,&Z k2
else p< jM%fbZk
data[cur]=temp[i2++]; ais"xm<V
} [,p[%Dza
} {= l9{K`~
09rbu\h
} yi3Cd@t({{
h{M.+I$}C
改进后的归并排序: e?!A]2
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package org.rut.util.algorithm.support; FDO$(&
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import org.rut.util.algorithm.SortUtil; FFqqAT5
b\9}zmG[u
/** 2=xjgK
* @author treeroot WMd5Y`y
* @since 2006-2-2 veh?oJi@
* @version 1.0 2q.J1:lW
*/ 8;]U:tv
public class ImprovedMergeSort implements SortUtil.Sort { q~:k[@`.
72>/@
private static final int THRESHOLD = 10; |cCrLa2*-
?Dk&5d^d
/* u>o2lvy8
* (non-Javadoc) Mk@%Wuxg2
* E"$AOM?(*i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7LY4q/
*/ F%pYnHr<
public void sort(int[] data) { op|/_I$
int[] temp=new int[data.length]; n[pW^&7x
mergeSort(data,temp,0,data.length-1); v-mhqhb
} [1{uK&$e
}_L,Xg:I
private void mergeSort(int[] data, int[] temp, int l, int r) { Fv"jKZPgzz
int i, j, k; Ks@
int mid = (l + r) / 2; 8n^v,s>
if (l == r) w{;esU
return; nv^nq]4'Dq
if ((mid - l) >= THRESHOLD) h"{Z%XPX#
mergeSort(data, temp, l, mid); { 'Db
else L<**J\=7M
insertSort(data, l, mid - l + 1); PYp<eo\
if ((r - mid) > THRESHOLD) TS{ycGY
mergeSort(data, temp, mid + 1, r); *CtOQ
else o3~ecJ?k
insertSort(data, mid + 1, r - mid); O_jf)N\pi
Lx:O Dd
for (i = l; i <= mid; i++) { 4 u!)QG
temp = data; {m/h3hjFa
} ]N+(SU
for (j = 1; j <= r - mid; j++) { WM_wkvYl
temp[r - j + 1] = data[j + mid]; ,KHebv!
} \]eB(&nq
int a = temp[l]; OZ6gu$ n*
int b = temp[r]; -mlBr63Bj
for (i = l, j = r, k = l; k <= r; k++) { q'%-8t
if (a < b) { <k0$3&D
data[k] = temp[i++]; se1\<YHDS
a = temp; z\fmwI
} else { -W5ml @
data[k] = temp[j--]; N>S_Vgk}
b = temp[j]; nDvj*lZF
} El$yM.M"
} #sK:q&/G`
} l|c#
M/X&zr
/** e-dpk^-
* @param data O%.c%)4Xo
* @param l "[ 091<
* @param i CfoT$g
*/ ? LA>5
private void insertSort(int[] data, int start, int len) { `$*cW1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V~> x\
} O]SjShp
} k%5o5Hx
} O.%' 47A
} `czL$tN<P
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堆排序： yrnIQu*Uu
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package org.rut.util.algorithm.support; $s*\yam?|
qd=&*?
import org.rut.util.algorithm.SortUtil; y()7m/
D)ZGTq`(
/** H +O7+=&
* @author treeroot DRC2U%[
* @since 2006-2-2 jW^@lH EU
* @version 1.0 ]\y:AkxhJ
*/ b'Scoa7@'
public class HeapSort implements SortUtil.Sort{ tp-PE?
~9Nn8g6
/* (non-Javadoc) gi|j! m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #@QZ
*/ zoUM<6q
public void sort(int[] data) { )zzK\I6/EQ
MaxHeap h=new MaxHeap(); hP1H/=~
h.init(data); x4&<Vr
for(int i=0;i h.remove(); FOAy'76p
System.arraycopy(h.queue,1,data,0,data.length); VfK8')IXk
} DeTx7i0
xWv@PqXD
private static class MaxHeap{ WQ(*A $
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void init(int[] data){ +}al_.
this.queue=new int[data.length+1]; Hy _ (
for(int i=0;i queue[++size]=data; w^e5"og]
fixUp(size); >}tm8|IHoo
} &&/2oP+z
} @j/UDM
:`~;~gW<
private int size=0; k?%?EsR
Bg"KNg
private int[] queue; Z=P]UD
8.S&J6
public int get() { rq;Xcc
return queue[1]; T2Q`Ax7
} }pOem}
1'O++j_%y
public void remove() { T)ZO+}
SortUtil.swap(queue,1,size--); 21b
fixDown(1); K+=cNC4B
} MlDWK_y_&
file://fixdown hmfO\gc}y
private void fixDown(int k) { 5C}1iZEJ
int j; ~(( '1+
while ((j = k << 1) <= size) { ){u/v[O9"
if (j < size %26amp;%26amp; queue[j] j++; +j*hbG=
if (queue[k]>queue[j]) file://不用交换 KCE5Z?k
break; O$=[m9V
SortUtil.swap(queue,j,k); i(hI\hD
k = j; IQ$cLr-S
} 8T&.8r
} hG~TqH^}B
private void fixUp(int k) { gLyXe,Jp
while (k > 1) { `1AVw]k
int j = k >> 1; oa4{s&db-
if (queue[j]>queue[k]) PBXRey7>D
break; bi^[Eh
SortUtil.swap(queue,j,k); rHzwSR@}1
k = j; &!|'EW
} P4&3jQ[o
} i&%~:K*
-@6R`m=>
} ^lB=O
kj$Ks2!W
} ,4O|{Iu#n
fC$Rz#5?
SortUtil： O;bnyB$
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package org.rut.util.algorithm; KaEL*
k/6Qwb#
import org.rut.util.algorithm.support.BubbleSort; Bu[sSoA
import org.rut.util.algorithm.support.HeapSort; }XJA#@
import org.rut.util.algorithm.support.ImprovedMergeSort; /$w,8pV=
import org.rut.util.algorithm.support.ImprovedQuickSort; ,".1![b
import org.rut.util.algorithm.support.InsertSort; |ia#Elavo
import org.rut.util.algorithm.support.MergeSort; nY]5pOF:
import org.rut.util.algorithm.support.QuickSort; `7v"(
import org.rut.util.algorithm.support.SelectionSort; ""0 cw
import org.rut.util.algorithm.support.ShellSort; #qx$ p
4^3}+cJ7j
/** d:j65yu
* @author treeroot FX"j8i/N
* @since 2006-2-2 V7+fNr]I
* @version 1.0 zSJSus
*/ eflmD$]SW
public class SortUtil { L5-p0O`R
public final static int INSERT = 1; O[$,e%
public final static int BUBBLE = 2; NNOemTh
public final static int SELECTION = 3; v- 793pr
public final static int SHELL = 4; z(00"ei
public final static int QUICK = 5; >-%tvrS%
public final static int IMPROVED_QUICK = 6; /6K9? /
public final static int MERGE = 7; 2=\} 0
public final static int IMPROVED_MERGE = 8; Nk#[~$Q-1
public final static int HEAP = 9; 3FD6.X>x
0Yzm\"Ggv
public static void sort(int[] data) { y\?T%g
sort(data, IMPROVED_QUICK); 5]-q.A5m
} ?@*hU2MTC
private static String[] name={ -a=RCzX]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YadG05PDe
}; %<^IAMkp
kH.e"e
private static Sort[] impl=new Sort[]{ VxgP^*
new InsertSort(), (_9u<
new BubbleSort(), W 'w{}|
new SelectionSort(), ^k*h
new ShellSort(), {5GXN!f
new QuickSort(), >}"9heF
new ImprovedQuickSort(), *VuiEBG
new MergeSort(), >/BMA;`
new ImprovedMergeSort(), AmyZ9r#{
new HeapSort() !R`E+G@
}; !_yWe
e&R?9z-*
public static String toString(int algorithm){ S)?V;@p6
return name[algorithm-1]; G!G]*p5
} D1ep7ykY
43'!<[?x
public static void sort(int[] data, int algorithm) { h4 X=d5qd
impl[algorithm-1].sort(data); m }J@w~#
} 8q}955Nl
4X}.aZO&b
public static interface Sort { rf ?\s/#OY
public void sort(int[] data); wr) \GJ#>
} iImy"$yX{
SsY:gp_
public static void swap(int[] data, int i, int j) { eBZ94rA]
int temp = data; hw @)W
data = data[j]; (D<_ iV
data[j] = temp; ehpU`vQz
} M:5K4$>Kx
} }zO>y%eI