[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; j xI;clr
} c[2ikI,n[
int i1=l; "gNi}dB<]
int i2=mid+1; %|+aI?
for(int cur=l;cur<=r;cur++){ @BLB.=
if(i1==mid+1) 4r_*: $g
data[cur]=temp[i2++]; ;B |
else if(i2>r) -cUbIbW
data[cur]=temp[i1++]; kVZs:
else if(temp[i1] data[cur]=temp[i1++]; =U~53Tg
else #@-dT,t
data[cur]=temp[i2++]; i?d545. u
} 6I(Y<LZ5
} xKBi".wA
o% Q7 el$f
} Pi1LOCq
7_3 PM 3C
改进后的归并排序: 8fi'"
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package org.rut.util.algorithm.support; v$@1q9 5J
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import org.rut.util.algorithm.SortUtil; G[ns^
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/** ).GM0-y
* @author treeroot g:~q&b[q6
* @since 2006-2-2 c]1AM)xo
* @version 1.0 %n6<6t`$
*/ jQ7;-9/~N
public class ImprovedMergeSort implements SortUtil.Sort { bbS,pid1
lGK7XAx,
private static final int THRESHOLD = 10; 4sSw7`
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/* |1H9,:*%
* (non-Javadoc) @$kzes\
* &b,A-1`w_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dpchZ{
*/ r2tE!gMC
public void sort(int[] data) { }LS.bQKqi,
int[] temp=new int[data.length]; UxB3/!<5g3
mergeSort(data,temp,0,data.length-1); nF]E":
} 4`o0?_.'
)(.g~Q:
private void mergeSort(int[] data, int[] temp, int l, int r) { Y5ei:r|^
int i, j, k; 1,zc8>M
int mid = (l + r) / 2; A>Qu`%g*
if (l == r) :{S@KsPqE
return; ^^ SMr l
if ((mid - l) >= THRESHOLD) p;7wH\c
mergeSort(data, temp, l, mid); h5@7@w%
else 0n4(Rj|}2
insertSort(data, l, mid - l + 1); !s$1C=z5u
if ((r - mid) > THRESHOLD) )bYOy+2g
mergeSort(data, temp, mid + 1, r); Nf* .r
else Zw4%L?
insertSort(data, mid + 1, r - mid); DfGq m-c
{C?$osrr
for (i = l; i <= mid; i++) { t{s>B]i^_w
temp = data; dj9i*#F
} (7,Q4T
for (j = 1; j <= r - mid; j++) { QTF1~A\
temp[r - j + 1] = data[j + mid]; Jk`l{N
} Z s|*+[
int a = temp[l]; h(~of(
int b = temp[r]; iM9k!u FE
for (i = l, j = r, k = l; k <= r; k++) { &\5bo=5V
if (a < b) { >e.vUUQ{
data[k] = temp[i++]; XgUSJ*
a = temp; ;InMgo,
} else { <WmjjD
data[k] = temp[j--]; ./DlHS;
b = temp[j]; Rq",;,0ZJ
} #ax% n
} zmuRn4Nv
} sGiK S,.K
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/** Rm,>6bQx
* @param data /IX555/dR1
* @param l )FA:wsy~E
* @param i L`Ys`7
*/ r-WX("Vvh
private void insertSort(int[] data, int start, int len) { $%&OaAg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N`X|z
} Y)(w&E>1
} .DnG}884
} ]<%NX $9\
} (<H@W/0$
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堆排序： M0vX9;J
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package org.rut.util.algorithm.support; U? U3?Y-k`
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import org.rut.util.algorithm.SortUtil; FSkX95
UT 7'-
/** g38MF
* @author treeroot K-c>J uv&,
* @since 2006-2-2 Y)GU{
* @version 1.0 \SgBI/L^
*/ &(o&Y
public class HeapSort implements SortUtil.Sort{ |Zo36@s
0x&L'&SpN
/* (non-Javadoc) M3d%$q)<rW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lF7".
*/ 8{&.[SC7
public void sort(int[] data) { g>b{hkIXg
MaxHeap h=new MaxHeap(); CNWA!1n^Hy
h.init(data); d,'gh4C
for(int i=0;i h.remove(); 2>CR]
System.arraycopy(h.queue,1,data,0,data.length); )T slI
} ]-+l.gVFW
5lwMc0{/3
private static class MaxHeap{ NOAz"m+o
$RC)e7
void init(int[] data){ qsQTJlq)
this.queue=new int[data.length+1]; -Vmp6XY3q
for(int i=0;i queue[++size]=data; {?cF2K#
fixUp(size); kcNPdc
} (enOj0
} $(yi+v
?ZhBS3L
private int size=0; \m<$qp,n
bXM&VW?OP
private int[] queue; ! bwy/A
( pCU:'"
public int get() { V72?E%d0
return queue[1]; r. rzU
} Y$ KR\ m
;jKLB^4nX
public void remove() { ^>fr+3a"P
SortUtil.swap(queue,1,size--); 5RF*c,cNq
fixDown(1); {uqP+Cs
} je%y9*V
file://fixdown P|;v>
private void fixDown(int k) { A=D G+z''
int j; + :b"0pu-H
while ((j = k << 1) <= size) { }h sR}
if (j < size %26amp;%26amp; queue[j] j++; J'wJe,
if (queue[k]>queue[j]) file://不用交换 Q:ql~qew
break; 0yb9R/3.
SortUtil.swap(queue,j,k); $/E{3aT@F2
k = j; Pn?gB}l
} cA90FqUH
} I3ugBLxVC3
private void fixUp(int k) { (;N#Gqb6l
while (k > 1) { 1l.HQ IS
int j = k >> 1; BY$L[U;@T
if (queue[j]>queue[k]) qzu(4*Gk6
break; )L"J?wTe
SortUtil.swap(queue,j,k); 1 a%1C`d
k = j; {JfL7%
} R0q|{5S
} OskQ[ e0
rF/<}ye/4M
} 1CUI6@Cz)
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} W7\UZPs5t
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SortUtil： \rH0=~F-P
L*{E-m/
package org.rut.util.algorithm; :{-/b
$o ;48uV^
import org.rut.util.algorithm.support.BubbleSort; Zo Ra^o
import org.rut.util.algorithm.support.HeapSort; E8aD[j[w
import org.rut.util.algorithm.support.ImprovedMergeSort; fz+dOIU3\L
import org.rut.util.algorithm.support.ImprovedQuickSort; @|d`n\%x
import org.rut.util.algorithm.support.InsertSort; <CS,v)4,nH
import org.rut.util.algorithm.support.MergeSort; d @b ]/
import org.rut.util.algorithm.support.QuickSort; tR?)C=4,
import org.rut.util.algorithm.support.SelectionSort; Ai`0Ud,M@
import org.rut.util.algorithm.support.ShellSort; * YLpC^&
byk9"QeY\
/** }l5Q0'
* @author treeroot J2!)%mF$
* @since 2006-2-2 UrdSo"%
* @version 1.0 "OrF81
*/ ;jmT5XzL
public class SortUtil { 'pT8S
public final static int INSERT = 1; 80LN(0?x
public final static int BUBBLE = 2; t2FA|UF
public final static int SELECTION = 3; aBKJd
public final static int SHELL = 4; <07~EP
public final static int QUICK = 5; kM76?M
public final static int IMPROVED_QUICK = 6; |u[@g`Z
public final static int MERGE = 7; )kE1g&
public final static int IMPROVED_MERGE = 8; 'D^@e0.3
public final static int HEAP = 9; f3mQd}<L
F^!_!V B
public static void sort(int[] data) { uAV-wc
sort(data, IMPROVED_QUICK); zHXb[$Q
} |_16IEJ
private static String[] name={ oK2jPP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =^w:G=ymS
}; Y>CZ
3o_@3-Y%
private static Sort[] impl=new Sort[]{ 1HeE$
new InsertSort(), /,+&O#SX
new BubbleSort(), !Ic~_7"
new SelectionSort(), YS>VQl
new ShellSort(), ,'@t.XP
new QuickSort(), GOX2'N\h^
new ImprovedQuickSort(), :?\Je+iA
new MergeSort(), gzp]hh@4
new ImprovedMergeSort(), ['aiNhlbt
new HeapSort() lkb,UL;V
}; .s3y^1C
rG'W#!^*
public static String toString(int algorithm){ AN+S6t
return name[algorithm-1]; eY(JU5{
} <1kK@m -E
BBj>ML\X
public static void sort(int[] data, int algorithm) { F?4&qbdD
impl[algorithm-1].sort(data); <a&$D
} P?<G:]W
=gO4B-[
public static interface Sort { H) q_9<;
public void sort(int[] data); -\8v{ry
} Jy-V\.N>s
'I@l$H
public static void swap(int[] data, int i, int j) { N?c!uO|h|
int temp = data; D3C3_ @*
data = data[j]; G]gc*\4
data[j] = temp; ")3$. '5Dg
} Ji0FHa_
} ~lr,}K,