[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; *:Y%HAy*
} <^VJy5>
int i1=l; Kz~ps 5
int i2=mid+1; j]{_s"O
for(int cur=l;cur<=r;cur++){ :*I#n
if(i1==mid+1) _GV:HOBi
data[cur]=temp[i2++]; 6V$Avg\6\
else if(i2>r) xcd#&
data[cur]=temp[i1++]; S=MEG+Ad
else if(temp[i1] data[cur]=temp[i1++]; \HqNAE2T
else t)~"4]{*}D
data[cur]=temp[i2++]; @@R7p
} tI`Q/a5@
} BBaQ}{F8>2
*1uKr9
} o*-)Tq8GHE
vmU@^2JSJ
改进后的归并排序: Z?6%;n^ 54
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package org.rut.util.algorithm.support; dzARI`
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import org.rut.util.algorithm.SortUtil; p, h9D_
E%yNa]\P
/** %aHB"vi6
* @author treeroot 2y//'3[
* @since 2006-2-2 Bc(Y(X$PK
* @version 1.0 0]'7_vDs|
*/ /z4$gb7Y
public class ImprovedMergeSort implements SortUtil.Sort { WYHQ?
X.OD`.!>
private static final int THRESHOLD = 10; L5Ebc#
? E1<!~
/* ! +a.Ei
* (non-Javadoc) y=fx%~<> 8
* 34`'M+3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N nRD|A
*/ .I7pA5V{#
public void sort(int[] data) { *T-<|zQ
int[] temp=new int[data.length]; {o)Lc6T8s
mergeSort(data,temp,0,data.length-1); @'w"R/,n-@
} :G [|CPm-
/$ w%Q-p
private void mergeSort(int[] data, int[] temp, int l, int r) { Ok|*!!T
int i, j, k; 8hu<E4]L
int mid = (l + r) / 2; dz:E?
if (l == r) {Bk[rCl
return; P60~V"/P
if ((mid - l) >= THRESHOLD) 2V"B:X\
mergeSort(data, temp, l, mid); v:f}XK<
else - \5v^l
insertSort(data, l, mid - l + 1); O@tU.5*$5
if ((r - mid) > THRESHOLD) lsgh#x
mergeSort(data, temp, mid + 1, r); ],>@";9u"
else ?~l6K(*2
insertSort(data, mid + 1, r - mid); }{,^@xdyW
FTX=Wyr
for (i = l; i <= mid; i++) { &4{KV.
temp = data; :nh_k4S@v
} ?}Z1bH
for (j = 1; j <= r - mid; j++) { q]\:P.x!>
temp[r - j + 1] = data[j + mid]; l>2E (Y|
} $~~Jw]
int a = temp[l]; p2Z?T}fa}&
int b = temp[r]; "An,Q82oHf
for (i = l, j = r, k = l; k <= r; k++) { z#zI1Am(O
if (a < b) { NvD7Krqwa
data[k] = temp[i++]; Qk0R a_
a = temp; V39g,=`b%
} else { ?[VM6- &
data[k] = temp[j--]; &c`nR<
b = temp[j]; bbtGXfI+SB
} 18)'c?^.
} 3]OE}[R
} &#o~U$GBg
H7?Vybg~
/** ++bf#qS<8D
* @param data v6[!o<@"a
* @param l c%^7!FSg
* @param i 7G:s2432
*/ AhCW'.
private void insertSort(int[] data, int start, int len) { g9m-TkNk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 10G}{
} ZEXc%-M
} -0d0t!
} QMA%$
} %"kPvI3Y
xN>npP
堆排序： GX)u|g
m-%E-nr
package org.rut.util.algorithm.support; <>n0arAn
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import org.rut.util.algorithm.SortUtil; Km%]1X7T6
P!~MZ+7#&
/** GSY(
* @author treeroot QEm|])V
* @since 2006-2-2 d)"3K6s|5
* @version 1.0 6~0$Z-);(
*/ Z_PNI#h*
public class HeapSort implements SortUtil.Sort{ bADnW4N`6;
8&;UO{
/* (non-Javadoc) Av @b!iw+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _U$<xVnP
*/ efSM`!%j
public void sort(int[] data) { NO2XA\
MaxHeap h=new MaxHeap(); w4_ U0 n3
h.init(data); x[4`fM.m*
for(int i=0;i h.remove(); AG3>V+k{Lv
System.arraycopy(h.queue,1,data,0,data.length); n+! AnKq
} Gn22<C/
E_gD:PPU5
private static class MaxHeap{ t![7uU.W
Qf58ig-vCY
void init(int[] data){ 2{M^,=^>
this.queue=new int[data.length+1]; VGLaN%|
for(int i=0;i queue[++size]=data; !*/*8re
fixUp(size); @M<|:Z %.@
} yTyj'-4
} cO-7ke
|$+3a
private int size=0; xpNH?#&
u=Fv2
private int[] queue; :fKl]XO
<i<J^-W
public int get() { :KH g&ZX7
return queue[1]; \/E>4)MDy
} B*qi_{Gp
Pih tf4i
public void remove() { !y#"l$"xK
SortUtil.swap(queue,1,size--); sD<a+Lw}x
fixDown(1); ZjT,pOSyb
} []x#iOnC&
file://fixdown oYHj~t
private void fixDown(int k) { XoXM^*Vk
int j; ,t}vz 7
while ((j = k << 1) <= size) { -_ I_W&
if (j < size %26amp;%26amp; queue[j] j++; kM!kD4&
if (queue[k]>queue[j]) file://不用交换 d; [C6d
break; (w&F/ynO:
SortUtil.swap(queue,j,k); %/EVUN9=
k = j; /TE_W@?^
} UT>s5C
} M\C"5%2Mu
private void fixUp(int k) { +_s #2
while (k > 1) { .R`5Qds*l
int j = k >> 1; )js)2L~
if (queue[j]>queue[k]) 2`.cK 3
break; hS_6
SortUtil.swap(queue,j,k); ?=>+LqP
k = j; Ytgcs( /$
} S(QpM.9*
} dCb`xR}
| H!28h
} %el"BSB
YpQ7)_s?
} g!cUF+
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SortUtil： ^*S ,xP
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package org.rut.util.algorithm; ]I-Z]m"
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import org.rut.util.algorithm.support.BubbleSort; PiYY6i0
import org.rut.util.algorithm.support.HeapSort; ckV`OaRw4
import org.rut.util.algorithm.support.ImprovedMergeSort; ot@|!V
import org.rut.util.algorithm.support.ImprovedQuickSort; 4B=2>k
import org.rut.util.algorithm.support.InsertSort; sfLMkE
import org.rut.util.algorithm.support.MergeSort; Yaj0;Lo[wt
import org.rut.util.algorithm.support.QuickSort; INUG*JC6
import org.rut.util.algorithm.support.SelectionSort; =b38(\
import org.rut.util.algorithm.support.ShellSort; U0=]
"ZHW2l Mf
/** _\=`6`b)
* @author treeroot Gn&-X]Rrl
* @since 2006-2-2 a5 *2h{i
* @version 1.0 Y;nZ=9Sw
*/ Z1zVwHa_
public class SortUtil { "~E[)^ANxD
public final static int INSERT = 1; ,PlO8;5]
public final static int BUBBLE = 2; syk!7zfK
public final static int SELECTION = 3; nv)2!mAh\
public final static int SHELL = 4; ;V^ 112|C
public final static int QUICK = 5; 1D16
public final static int IMPROVED_QUICK = 6; ]e>RK'
public final static int MERGE = 7; ~+bv6qxg]\
public final static int IMPROVED_MERGE = 8; {zQS$VhXr
public final static int HEAP = 9; &-s'BT[PGq
?P4w]a
public static void sort(int[] data) { rxr{/8%f%
sort(data, IMPROVED_QUICK); ur*T%b9&
} G,TM-l_uw
private static String[] name={ qe#P?[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 17D"cP
}; !) S ?m
~n[d4qV&
private static Sort[] impl=new Sort[]{ CQZgMY1{
new InsertSort(), Mmj;'iYOwF
new BubbleSort(), Y^36>1.:
new SelectionSort(), K6y :mJYp\
new ShellSort(), Jwj%_<
new QuickSort(), np%\&CVhN
new ImprovedQuickSort(), y+!+ D[x
new MergeSort(), JBZUv
new ImprovedMergeSort(), *J$=.fF1
new HeapSort() gWrgnlq
}; ;`l'2 z@N
{x:ZF_wbb
public static String toString(int algorithm){ 1h>yu3O
return name[algorithm-1]; c<uN"/gi*
} '#LQN<"4
'sLiu8G
public static void sort(int[] data, int algorithm) { "+\lws
impl[algorithm-1].sort(data); :1 (p.q=
} $|]" W=h
e`d%-9
public static interface Sort { ,REJt
public void sort(int[] data); V<D.sd<
} xO1[>W
#Pw2Q
public static void swap(int[] data, int i, int j) { bgS${n/
int temp = data; Kk(9O06j
data = data[j]; R-NS,i={
data[j] = temp; M(RZ/x
} /D5`
} ;=geHiQHA