[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; Fdr*xHx$P
} .@Hmg
int i1=l; a" ^#!G<+
int i2=mid+1; i<J^:7
for(int cur=l;cur<=r;cur++){ $\0TD7p
if(i1==mid+1) L%k67>
data[cur]=temp[i2++]; VZt;P%1;h
else if(i2>r) :wSJ-\'$
data[cur]=temp[i1++]; x<Iy<v7-
else if(temp[i1] data[cur]=temp[i1++]; uvR0TIF4
else gj[zka0_
data[cur]=temp[i2++]; F:M/z#:~
} n$IWoIdbGN
} -*r[
nrI"k2oA@
} +<GrRYbC
}+*w.X}L
改进后的归并排序: ]&' jP
ZMP?'0h=
package org.rut.util.algorithm.support; mn(/E/
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import org.rut.util.algorithm.SortUtil; vNPfUEnA
4+-5,t7
/** vwm|I7/w
* @author treeroot y9=t;qH@|
* @since 2006-2-2 .zQ4/
* @version 1.0 ;A x=]Q
*/ =jsx(3V
public class ImprovedMergeSort implements SortUtil.Sort { ZUv ZNf
=.VepX|?D
private static final int THRESHOLD = 10; Th.3j's
(_s;aK
/* o*?[_{xW
* (non-Javadoc) }Q,(u
* P_kaIPP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -hQ96S8
*/ =_K%$y*
public void sort(int[] data) { IES41y<
int[] temp=new int[data.length]; 0W;q!H[G
mergeSort(data,temp,0,data.length-1); *iPs4Es-
} j~Xj
OY+!aG@.
private void mergeSort(int[] data, int[] temp, int l, int r) { !}z%#$
int i, j, k; Z`^ K%P=
int mid = (l + r) / 2; & 8ccrw
if (l == r) Xs{/}wc.q;
return; f:n]Exsy
if ((mid - l) >= THRESHOLD) qK<aZ%V
mergeSort(data, temp, l, mid); O\LjtMF
else mipi]*ZfXE
insertSort(data, l, mid - l + 1); @QvfN>T
if ((r - mid) > THRESHOLD) 32M6EEmPG
mergeSort(data, temp, mid + 1, r); 5JO[+>
else xWd9%,mDNR
insertSort(data, mid + 1, r - mid); }*xC:A%aS
C<zx'lw!
for (i = l; i <= mid; i++) { s'R~r
temp = data; bMSD/L
} (K^YD K
for (j = 1; j <= r - mid; j++) { Ti0 (VdY
temp[r - j + 1] = data[j + mid]; ac2}3$u
} N;e;4,_ n
int a = temp[l]; OJnPP>
int b = temp[r]; -OHvK0~
for (i = l, j = r, k = l; k <= r; k++) { pI'8>_o
if (a < b) { ;5&k/CB1
data[k] = temp[i++]; $ijx#a&O
a = temp; /&~nM
} else { NvXj6U*%
data[k] = temp[j--]; |U8>:DEl
b = temp[j]; +J\L4ri k
} p*A^0DN'Fn
} e}{8a9J<%_
} ~,(0h:8
113Z@F
/** SIKk|I)
* @param data \DG( 8l
* @param l \9dz&H
* @param i trID#DT~
*/ % <8K^|w
private void insertSort(int[] data, int start, int len) { ^hQ:A4@q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s4\SX,
} X7'h@>R
} wxdh?sQ
} ,apd3X%g
} tXssejiE%
zv$=*
堆排序： $#6Fnhh}
/ig^7+#
package org.rut.util.algorithm.support; @t{{Q1
yVbg,q'?
import org.rut.util.algorithm.SortUtil; @ef//G+Z"
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/** ;`X`c
* @author treeroot J>,'P^
* @since 2006-2-2 v*vub#wP
* @version 1.0 ~$ cm9>
*/ o+)m}'T8
public class HeapSort implements SortUtil.Sort{ VZ9e~){xA
)?= kb
/* (non-Javadoc) ZwY`x')
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m? \#vw$
*/ G#_(7X&
public void sort(int[] data) { DzX6U[=
MaxHeap h=new MaxHeap(); v.~Nv@+kR
h.init(data); jgZX~D
for(int i=0;i h.remove(); I1eb31<
System.arraycopy(h.queue,1,data,0,data.length); hr/xpQW
} g4BwKENM
B1 jH.(
private static class MaxHeap{ +iZ@.LI
`Z;B^Y0
void init(int[] data){ pn ~/!y
this.queue=new int[data.length+1]; HQ-N!pf9
for(int i=0;i queue[++size]=data; ];YglHH
fixUp(size); "GIg|3
} [4V|UvKz
} bi4^ zaCEE
ijR-?nrR
private int size=0; J.CZR[XF#
zD#+[XI]K
private int[] queue; f4@#pnJ3po
RPScP
public int get() { #/&q
return queue[1]; AOvH&9**
} Z.cG`Km*
3!ajvSOI9j
public void remove() { bOnukbJ
SortUtil.swap(queue,1,size--); j,gM+4V^
fixDown(1); DcFV^8O&
} .q'FSEkMJ
file://fixdown h:US]ZC^Z
private void fixDown(int k) { 6 ^6uK
int j; cSHtl<UY
while ((j = k << 1) <= size) { B<|q{D$N/
if (j < size %26amp;%26amp; queue[j] j++; l1`c?Y
if (queue[k]>queue[j]) file://不用交换 A-@-?AR
break; 6832N3=
SortUtil.swap(queue,j,k); u:{. Hn`
k = j; %Pt[3>
} unbcz{&Hb[
} Ay[9k=q]
private void fixUp(int k) { HeAc(_=C
while (k > 1) { `siy!R
int j = k >> 1; $)i"[
if (queue[j]>queue[k]) :#"OCXr
break; U8.0L
SortUtil.swap(queue,j,k); e-T9HM&%P
k = j; *(XgUJq+
} c+\Gd}IJq
} [3bwbfHhi
~k:>Xo[|O
} =-a?oH-
y+~Aw"J}
} +$pO
O+3D 5*
SortUtil： (t"YoWA#m
PHB\)/
package org.rut.util.algorithm; )Sh;UW
Qg8eq_m(
import org.rut.util.algorithm.support.BubbleSort; _oyL*Cb
import org.rut.util.algorithm.support.HeapSort; O.m.]%URW
import org.rut.util.algorithm.support.ImprovedMergeSort; k%bTs+]*
import org.rut.util.algorithm.support.ImprovedQuickSort; (HP={MrV
import org.rut.util.algorithm.support.InsertSort; "p_[A
import org.rut.util.algorithm.support.MergeSort; p_kTLNZd9
import org.rut.util.algorithm.support.QuickSort; 9BgQoK@
import org.rut.util.algorithm.support.SelectionSort; rqG6Ll`=+
import org.rut.util.algorithm.support.ShellSort; 7zOvoQ}
U]R|ej
/** _ jM6ej<
* @author treeroot fSb@7L
* @since 2006-2-2 u{y5'cJ{
* @version 1.0 ^,\se9=(
*/ H"Em|LX^
public class SortUtil { 0^tJX1L
public final static int INSERT = 1; I?xhak1)lu
public final static int BUBBLE = 2; ^LAS9K1.
public final static int SELECTION = 3; &opH\wa
public final static int SHELL = 4; Yh!\:9@(
public final static int QUICK = 5; uma9yIk
public final static int IMPROVED_QUICK = 6; F\$}8,9
public final static int MERGE = 7; C8%nBa/
public final static int IMPROVED_MERGE = 8; $F==n4)
public final static int HEAP = 9; ^c:eXoU
~m"M#1,ln3
public static void sort(int[] data) { Y_ u7 0@`
sort(data, IMPROVED_QUICK); D/!G]hx
} :O2v0Kx
private static String[] name={ ?(XX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UW~tS
}; JO;`Kz_$
TTjjyZ@
private static Sort[] impl=new Sort[]{ )}k`X<~k
new InsertSort(), >?Y3WPB<F
new BubbleSort(), !-Tmu
new SelectionSort(), dIe 6:s
new ShellSort(), cVt$#A)
new QuickSort(), "Mu$3w
new ImprovedQuickSort(), .cnw?EI
new MergeSort(), E"vi+'(v
new ImprovedMergeSort(), ]{l O
new HeapSort() ;Q%19f3,6
}; ckkM)|kK
pRfHbPV?
public static String toString(int algorithm){ =dJEcC_J
return name[algorithm-1]; Mdq'> <ajL
} N_~Wu
v,O&UrZ
public static void sort(int[] data, int algorithm) { vmQ DcCw
impl[algorithm-1].sort(data); Ymh2qGcj]8
} UHm+5%ZC
L&F\"q9q71
public static interface Sort { wz2)seZY
public void sort(int[] data); Lzb [%?
} DL/*t.)"et
W!Os ci
public static void swap(int[] data, int i, int j) { kO O~%|1CP
int temp = data; O#ajoE
data = data[j]; 0DjBqh$
data[j] = temp; (]uoN4
} ;{#M
} /t2<OU9