[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; 6 9>@0P
} f/)Y {kS6
int i1=l; ]3LLlXtK[
int i2=mid+1; TxJk.c
for(int cur=l;cur<=r;cur++){ OG5{oH#K
if(i1==mid+1) t#^Cem<
data[cur]=temp[i2++]; 1}d F,e
else if(i2>r) #_DpiiS,.Q
data[cur]=temp[i1++]; tgF~5 o}?
else if(temp[i1] data[cur]=temp[i1++]; U#z"t&o=L
else GW AT0
data[cur]=temp[i2++]; Ui'v' $
} t]h_w7!U
} 2R\K!e
o%_-u +
} /HdXJL9B
A(2 0+
改进后的归并排序: r8EJ@pOF2w
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package org.rut.util.algorithm.support; ~su>RolaX
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import org.rut.util.algorithm.SortUtil; w){B$X
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/** LeCc`x,5
* @author treeroot rS [4Pey
* @since 2006-2-2 Y/sav;
* @version 1.0 'gY?=,dF>
*/ "Hw%@]#
public class ImprovedMergeSort implements SortUtil.Sort { RdX+:!lD
NfoHQU<n
private static final int THRESHOLD = 10; MSCH6R"5
\l/(L5gY
/* jwI2T$
* (non-Javadoc) Q`k;E}x_-
* JN8Rh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aT,WXW*
*/ 2XR!2_)O5
public void sort(int[] data) { 7J);{ &x9h
int[] temp=new int[data.length]; sX"L\v
mergeSort(data,temp,0,data.length-1); ntIR#fB
} /dCsZA
E-WpsNJ)X
private void mergeSort(int[] data, int[] temp, int l, int r) { OC&BJNOi
int i, j, k; #N][-i
int mid = (l + r) / 2; #6M |T+=
if (l == r) 5Ew( 0K[
return; 6 wN*d 5
if ((mid - l) >= THRESHOLD) T6/P54S
mergeSort(data, temp, l, mid); U6-47m0%
else Mi.#x_
insertSort(data, l, mid - l + 1); ;` L%^WZ;-
if ((r - mid) > THRESHOLD) 0Z2XVq~T$
mergeSort(data, temp, mid + 1, r); ep8UWxB5
else |sGJum&=
insertSort(data, mid + 1, r - mid); ,a>Dv@$Y
vv)q&,<c
for (i = l; i <= mid; i++) { ;pm/nu
temp = data; N^QxqQ~
} "}X+vd``
for (j = 1; j <= r - mid; j++) { /4+L2O[
temp[r - j + 1] = data[j + mid]; "nz\YQdg
} r5gqRh}+
int a = temp[l]; '-"[>`[q
int b = temp[r]; ~7b#BXzP
for (i = l, j = r, k = l; k <= r; k++) { _n:RA)4*
if (a < b) { >a975R*g
data[k] = temp[i++]; \:@6(e Bh
a = temp; Wrp~OF0k
} else { y{M7kYWtHV
data[k] = temp[j--]; o}=*E
b = temp[j]; P].Eb7I
} k{r<S|PK0
} huZ5?'/Fg
} Xm# +Z`|N
q]1p Q)\'p
/** *$O5.`]
* @param data Lx_Jw\YO
* @param l <oXBkCi0r
* @param i 3[Q7'\
*/ E,d<F{=8,o
private void insertSort(int[] data, int start, int len) { 29=ob("
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s/ABT.ZO
} 8Y-*rpLy
} &B5&:ib1D
} `a52{Wa
} R?1Z[N
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堆排序： TFOx=_.%i
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package org.rut.util.algorithm.support; UIU Pi gd
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import org.rut.util.algorithm.SortUtil; %KVmpWku
V]Te_ >E;w
/** J#Q>dC7
* @author treeroot ^/2HH
* @since 2006-2-2 gdCit-3
* @version 1.0 H*G(`Zl}
*/ }bRn&)e
public class HeapSort implements SortUtil.Sort{ ITl>HlS
p9jC-&:
/* (non-Javadoc) "'t f]s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,|z@Dy
*/ 7(D)U)9h
public void sort(int[] data) { Pek[j)g}
MaxHeap h=new MaxHeap(); PCwc=
h.init(data); N( 7(~D=)B
for(int i=0;i h.remove(); 5$!idfDr|m
System.arraycopy(h.queue,1,data,0,data.length); +UWv}|
} HY_>sD
CF3x\6.q}
private static class MaxHeap{ R<fF ^^
q~#>MB}".
void init(int[] data){ q{V e%8$"
this.queue=new int[data.length+1]; /t`|3Mw
for(int i=0;i queue[++size]=data; e<uf)K=(C
fixUp(size); 0,-]O=
} X9PbU1o;
} @-K[@e/uwy
;07$G+['
private int size=0; Q\zaa9P
ie[X7$@
private int[] queue; dLGHbeZ[(
WL(Y1>|j
public int get() { <o9i;[+H-
return queue[1]; tJ_Y6oFm=
} 3{.]!
f"gYXaVF+
public void remove() { #qk=R7"Q
SortUtil.swap(queue,1,size--); /":/DwI'
fixDown(1); dn}EM7:Z
} (xvg.Nby
file://fixdown Q_p&~PNy5
private void fixDown(int k) { iz;5:
int j; /JRZ?/<1
while ((j = k << 1) <= size) { |%5pzYe
if (j < size %26amp;%26amp; queue[j] j++; O*/%zr
if (queue[k]>queue[j]) file://不用交换 S]=.p-Am
break; IAzFwlO9
SortUtil.swap(queue,j,k); p2(ha3PW
k = j; fJ\?+,
} ] 7[#K^
} *.eeiSi{
private void fixUp(int k) { E$z-|-{>
while (k > 1) { cQxUEY('+
int j = k >> 1; TDZ==<C
if (queue[j]>queue[k]) @"h4S*U
break; #-Mr3
SortUtil.swap(queue,j,k); Wm"q8-<<
k = j; qi~-<qW
} "6IZf>N@#
} 1`|Z8Jpocj
0827z
} h3.CvPYy1
g||EjCsp
} !"<rlB,J
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SortUtil： Z3MhHvvgp{
F5+FO^3E
package org.rut.util.algorithm; M hW9^?
wO.d;SK
import org.rut.util.algorithm.support.BubbleSort; 7bbFUUUG"
import org.rut.util.algorithm.support.HeapSort; PX?%}~ v
import org.rut.util.algorithm.support.ImprovedMergeSort; 9;I%Dv
import org.rut.util.algorithm.support.ImprovedQuickSort; CAviP61T
import org.rut.util.algorithm.support.InsertSort; Rs{8vV
import org.rut.util.algorithm.support.MergeSort; LEjq<t1&
import org.rut.util.algorithm.support.QuickSort; uWClT):
import org.rut.util.algorithm.support.SelectionSort; JFc,f
import org.rut.util.algorithm.support.ShellSort; %Iflf]l
qLX<[UL
/** .3UJ*^(?
* @author treeroot ?fP3R':s
* @since 2006-2-2 Y|b,pC|,
* @version 1.0 SJX9oVJeZ
*/ u4T$
public class SortUtil { XXX y*/P
public final static int INSERT = 1; 6/3E!8
public final static int BUBBLE = 2; &+(D< U
public final static int SELECTION = 3; %{IgY{X
public final static int SHELL = 4; #"c'eG0
public final static int QUICK = 5; rZ+4kf6S
public final static int IMPROVED_QUICK = 6; e(0cz6
public final static int MERGE = 7; 9[X'9*,
public final static int IMPROVED_MERGE = 8; .czUJyFms}
public final static int HEAP = 9; 2<OU)rVE4
-z. wAp
public static void sort(int[] data) { l="X|t
sort(data, IMPROVED_QUICK); dHiir&Rd9`
} 4x-,l1NMR
private static String[] name={ K%L6UQ;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vy5Fw&?"
}; !^y;|9?O
-3? <Ja
private static Sort[] impl=new Sort[]{ (x/:j*`K
new InsertSort(), zd8A8]&-
new BubbleSort(), a;KdkykG
new SelectionSort(), |S).,B
new ShellSort(), XZ8rM4 ]
new QuickSort(), U!Zj%H1XQ0
new ImprovedQuickSort(), lr;ubBbT
new MergeSort(), iex%$> "
new ImprovedMergeSort(), 7neJV
new HeapSort() ct|0zl~
}; {*n<A{$[ m
[G|(E
public static String toString(int algorithm){ B%u[gNZ
return name[algorithm-1]; +J{ErsG?6P
} _3%:m||,XP
Y)lr+~84f
public static void sort(int[] data, int algorithm) { ><IWF#kUA
impl[algorithm-1].sort(data); IEm~^D#<=
} (||qFu9a
'ParMT
public static interface Sort { 8Uh|V&
public void sort(int[] data); SD*q+Si,1U
} 1k:yU(
Op9 ^Eu%n
public static void swap(int[] data, int i, int j) { re%XaL
int temp = data; Hicd -'
data = data[j]; F-o?tU
data[j] = temp; 6RxI9{ry
} f^QC4hf0
} x.t&NP^V)