[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; ^xpiNP!?a
} Pd~{XM,yfW
int i1=l; C `>1x`n
int i2=mid+1; S(c&XJR
for(int cur=l;cur<=r;cur++){ GJ3@".+6
if(i1==mid+1) pKxq\U
data[cur]=temp[i2++]; )PU_'n=>
else if(i2>r) `!JcQ'u
data[cur]=temp[i1++]; #cZ<[K q6
else if(temp[i1] data[cur]=temp[i1++]; [5iBXOmpS=
else ;mi+[`E
data[cur]=temp[i2++]; qZcRK9l]F1
} >@mvb@4*
} '/ >7pB
LRuB&4r8
} 5i$iUDuT>(
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改进后的归并排序: gXQ s)Eyv
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package org.rut.util.algorithm.support; 8vuA`T!~G
j~'a %P
import org.rut.util.algorithm.SortUtil; qkg`4'rLg
1 po.Cmx
/** t}!Y}D
* @author treeroot {zri6P+s
* @since 2006-2-2 pI>[^7
* @version 1.0 ?Tr]zxtd
*/ .}O _5b(
public class ImprovedMergeSort implements SortUtil.Sort { 9k`}fk\M
_T{ "F
private static final int THRESHOLD = 10; IGtpL[.;/
A%zX LV=3O
/* wS)2ymRg
* (non-Javadoc) 3G;#QK-c
* T=kR!Gx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?KKu1~a_
*/ dpTeF`N
public void sort(int[] data) { d hp-XIA;
int[] temp=new int[data.length]; FthrI
mergeSort(data,temp,0,data.length-1); h3<L,Olp
} -!C9x?gNY
xe!([^l&
private void mergeSort(int[] data, int[] temp, int l, int r) { SdJGhU
int i, j, k; 9 :ubPqt
int mid = (l + r) / 2; ! /^Jma7n
if (l == r) EV$$wrohQ`
return; jnu!a.H
if ((mid - l) >= THRESHOLD) X>$s>})Y
mergeSort(data, temp, l, mid); REj<2Lo
else G 5T{*
insertSort(data, l, mid - l + 1); 0[O."9
if ((r - mid) > THRESHOLD) b":3J)Y6.
mergeSort(data, temp, mid + 1, r); 6N<v&7cSB
else 2jUEL=+Y
insertSort(data, mid + 1, r - mid); FD+y?UF
\?VNr2
for (i = l; i <= mid; i++) { C~r(*nr
temp = data; A.%MrgOOX
} ,?k~>,{3
for (j = 1; j <= r - mid; j++) { z87_/(nu
temp[r - j + 1] = data[j + mid]; u51%~
} qTA,rr#p0
int a = temp[l]; DA(ur'D
int b = temp[r]; /p PSo
for (i = l, j = r, k = l; k <= r; k++) { ?}tWI7KI
if (a < b) { A'=,q
data[k] = temp[i++]; e0nr dM[i
a = temp; )^)j=xs
} else { JR_s-&GaM
data[k] = temp[j--]; @_L:W1[
b = temp[j]; wyVQV8+&>
} A;'*>NS
} 'ZUB:R@[
} p[J 8 r{'
3%NbT
/** H({Y
* @param data z/Kjz$l!
* @param l L4x08 e
* @param i 2`ED?F68gH
*/ {f12&t
private void insertSort(int[] data, int start, int len) { M< 1rQW'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Tx|}ke~
} jlA?JB
} yW!+:y_N_
} ?L'4*S]
} V|njgcn d
1yg5d9
堆排序： l[cBDNlrC;
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package org.rut.util.algorithm.support; =ll{M{0Q]!
ee7{5
import org.rut.util.algorithm.SortUtil; |LwW/>I
B4>kx#LR
/** jb5nL`(j$
* @author treeroot KXtc4wra
* @since 2006-2-2 `PH*tdYrh
* @version 1.0 $zR[2{bg
*/ &AS<2hB
public class HeapSort implements SortUtil.Sort{ KXS{@/"-B
Naqz":%.
/* (non-Javadoc) -2`D(xC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '(4#He?Gd
*/ D{J+}*y
public void sort(int[] data) { v)VhR2d3
MaxHeap h=new MaxHeap(); O6Gg?j
h.init(data); mH/$_x)o
for(int i=0;i h.remove(); `~.0PnHf
System.arraycopy(h.queue,1,data,0,data.length); UyWKE<
} 2^TJ_xG~
=64%eF
private static class MaxHeap{ tI&E@
bB#6Xx
void init(int[] data){ 49;2tl;F
this.queue=new int[data.length+1]; 1,/L&_=_A
for(int i=0;i queue[++size]=data; j. m(Z}
fixUp(size); |}O9'fyU8
} tK$x=9M
} }_A#O|dxO
,fQs+*j
private int size=0; %mv9+WJN.
4=T>Iy
private int[] queue; u3Jsu=Nx-
>~% _U+6
public int get() { +EnJyli
return queue[1]; )t/[z3rn
} <>&!+|#
6kc/
public void remove() { 5nhc|E)C
SortUtil.swap(queue,1,size--); G#~6a%VW
fixDown(1); ic+tn9f\
} 1aAYBV<3
file://fixdown !{L6 4qI
private void fixDown(int k) { S(5aJ[7Zm
int j; F%v?,`_&I
while ((j = k << 1) <= size) { GsG9;6c+u
if (j < size %26amp;%26amp; queue[j] j++; R^i8AbFW
if (queue[k]>queue[j]) file://不用交换 'aWzam>
break; 4*<27
SortUtil.swap(queue,j,k); A^a9,T
k = j; 1Xv- e8M
} /^d!$v
} wkp|V{k
private void fixUp(int k) { 9%VNzPzf
while (k > 1) { kp+\3z_
int j = k >> 1; D-zqu~f`
if (queue[j]>queue[k]) otsINAizgS
break; <AzM~]"3
SortUtil.swap(queue,j,k); P9wx`x""k
k = j; t-vH\m
} u/@dWeY[]
} aXSTA,%
kdWk{ZT^
} x{B%TM-Ey
o~Im5j],*
} mh4NZ @;
#hBDOXHPf
SortUtil： qP"<vZ
JQ*CF(9
package org.rut.util.algorithm; fRTQ5V
6^L4wd7)
import org.rut.util.algorithm.support.BubbleSort; L;},1 \
import org.rut.util.algorithm.support.HeapSort; );$L#XpB
import org.rut.util.algorithm.support.ImprovedMergeSort; 8#Q=CTjF
import org.rut.util.algorithm.support.ImprovedQuickSort; FuYV}C
import org.rut.util.algorithm.support.InsertSort; Mb I';Mq
import org.rut.util.algorithm.support.MergeSort; Tv;|K's'
import org.rut.util.algorithm.support.QuickSort; ]0HlPP:2
import org.rut.util.algorithm.support.SelectionSort; Ef;OrE""
import org.rut.util.algorithm.support.ShellSort; !5~{?sr>
0!n6tz lT
/** T/V 5pYl
* @author treeroot >Ic)RPO9
* @since 2006-2-2 mn=G6h T}W
* @version 1.0 (+Yerc.NQt
*/ Jmln*,Ol7
public class SortUtil { h5bQ
public final static int INSERT = 1; |zV-a2K%J
public final static int BUBBLE = 2; BO b#9r
public final static int SELECTION = 3; ~CQYF,[Th
public final static int SHELL = 4; }5RCks;)*
public final static int QUICK = 5; ,R j{^-k
public final static int IMPROVED_QUICK = 6; eeuTf
public final static int MERGE = 7; %#rH~E
public final static int IMPROVED_MERGE = 8; 3N) bJ
public final static int HEAP = 9; 3B(6^iS
^G,]("di`
public static void sort(int[] data) { dpO ZqhRs.
sort(data, IMPROVED_QUICK); io]e]m%
} -vXX u;frt
private static String[] name={ F3\'WQh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #:v e3gWl
}; -*sDa6L
Ojx1IL
private static Sort[] impl=new Sort[]{ vZM.gn
new InsertSort(), qbjLTE=
new BubbleSort(), zR'lQ<u
new SelectionSort(), Y5~_y?BX
new ShellSort(), nlsQf3
new QuickSort(), '3f"#fF6
new ImprovedQuickSort(), TR8<=
new MergeSort(), AepAlnI@
new ImprovedMergeSort(), 9S0I<<m
new HeapSort() 4VjP:>*p
}; HR55|`]
;zD1#dD
public static String toString(int algorithm){ .`84Y
return name[algorithm-1]; Z-RgN
} aClXg-
ic:_v?k
public static void sort(int[] data, int algorithm) { VRYj&s'@
impl[algorithm-1].sort(data); .17WF\1HC.
} -{i;!XE$SR
5-Vdq
public static interface Sort { ?Sj3-*/?
public void sort(int[] data); _2VL%
} 3_W1)vd{
%aU4d e^
public static void swap(int[] data, int i, int j) { 6mJa
int temp = data; 3T$gT
data = data[j]; /wB<1b"
data[j] = temp; )+c4n]
} K@P5]}'#
} 8[SiIuIV