[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; &(]@L\A
} ?zD?-
int i1=l; g5 J[ut
int i2=mid+1; cJnAwIs_e`
for(int cur=l;cur<=r;cur++){ y.l`NTT]<
if(i1==mid+1) 5D32d1A
data[cur]=temp[i2++]; ktILKpHt"
else if(i2>r) eKq`t.*Ft
data[cur]=temp[i1++]; QKAo}1Pq
else if(temp[i1] data[cur]=temp[i1++]; 5zqlK-$
else Sf2pU!5n^
data[cur]=temp[i2++]; pS3TD"p
} RvQl{aL
} x!A.**
KfO$bmwmx
} oTPPYi[r
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改进后的归并排序: TfYXF`d
~ "^]\3#
package org.rut.util.algorithm.support; /=5YHq>
BixKK$Lo
import org.rut.util.algorithm.SortUtil; CO`%eL~
dsx'l0q 'i
/** l 4zl|6%
* @author treeroot uK:?6>H
* @since 2006-2-2 Q!%4Iq%jr
* @version 1.0 {g:I5 A#
*/ }E\ b_.
public class ImprovedMergeSort implements SortUtil.Sort { ]ZQ3|ZJ?<
Jzg>Y?jN R
private static final int THRESHOLD = 10; D{]t50a.
{c'2{`px 5
/* v[r5!,F
* (non-Javadoc) 8Rgvb3u
* qH3|x08
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) = h _>OA
*/ n(|~z
public void sort(int[] data) { .o(XnY)cgJ
int[] temp=new int[data.length]; l Ikh4T6i
mergeSort(data,temp,0,data.length-1); \,-t]$9
} ;\F3~rl
u}eqU%
private void mergeSort(int[] data, int[] temp, int l, int r) { 1keH1[
int i, j, k; w"Q6'/P
int mid = (l + r) / 2; U;Iqz1S
if (l == r) {&2aH>V/
return; :N\j@yJK
if ((mid - l) >= THRESHOLD) }=1#ANM1
mergeSort(data, temp, l, mid); HC4vet
else %_rdO(
insertSort(data, l, mid - l + 1); 4,8=0[eRG
if ((r - mid) > THRESHOLD) 7~2b4"&
mergeSort(data, temp, mid + 1, r); J YA
else y"Fp4$qb
insertSort(data, mid + 1, r - mid); 5J d7<AO_
OJ (ho&((
for (i = l; i <= mid; i++) { j-egsKR
temp = data; '[E|3K5d
} 2S~cW./#fX
for (j = 1; j <= r - mid; j++) { }@kD&2
temp[r - j + 1] = data[j + mid]; <oweLRt
} *hhPCYOm
int a = temp[l]; h]wahExYP
int b = temp[r]; j.? '*?P
for (i = l, j = r, k = l; k <= r; k++) { &n_aMZ;
if (a < b) { }:5_vH0
data[k] = temp[i++]; hJrcy!P<a
a = temp; 3?x4+b
} else { [0M2`x4`
data[k] = temp[j--]; ra="4T$va
b = temp[j]; ,/d R
} Xz,-'
} &d"c6il[
} \+]U1^
zh5$$*\
/** 2E V M*^A
* @param data r-27AJu
* @param l 4NY00d/R
* @param i b)7uz>I
*/ "A_,Ga
private void insertSort(int[] data, int start, int len) { <78]OZ] Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fs8nYgv|Q
} ^tWt"GgC
} }LXS!Ff:
} >C6wm^bl
} N|Cx";,|FZ
(&n4^tJ+_
堆排序： c\X0*GX
]_cBd)3P}
package org.rut.util.algorithm.support; 4WK@ap-~
Y^zL}@
import org.rut.util.algorithm.SortUtil; ~Wh}W((L
Irk@#,{<
/** DU_38tz
* @author treeroot r"yA=d'c
* @since 2006-2-2 -7GF2 @
* @version 1.0 ye-o'%{
*/ 5gZEcJ
public class HeapSort implements SortUtil.Sort{ ]<9=%m
:}r^sD
/* (non-Javadoc) I y?_2m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bFivHms
*/ s%tPGjMq
public void sort(int[] data) { "qEi$a&]
MaxHeap h=new MaxHeap(); 'r KDw06/
h.init(data); |aH;@V
for(int i=0;i h.remove(); "=cWcztiP
System.arraycopy(h.queue,1,data,0,data.length); @"M%ZnFu
} d/Q}I[J.u
4::>Ca^{
private static class MaxHeap{ X#l]%IrW!
^i3~i?\,P
void init(int[] data){ f/spJ<B).4
this.queue=new int[data.length+1]; Q>\y%&df
for(int i=0;i queue[++size]=data; g~ tG
fixUp(size); |ITSd%`3_
} @(XX68
} w7b?ve3-
sOc<'):TK
private int size=0; k+xj 2)d7
SHw%u~[hu
private int[] queue; ld~8g,
=^.f)
public int get() { ~z)diF<
return queue[1]; $gi{)'z
} ,vBi)H
xrbDqA.b
public void remove() { Dp:u!tdbeg
SortUtil.swap(queue,1,size--); P0m;AqS#R
fixDown(1); neQ2k=ao
} z/bJDSQ
file://fixdown j%%l$i~
private void fixDown(int k) { 0 S3~IeJ
int j; )^+v*=Dc-i
while ((j = k << 1) <= size) { RX",Zt$q
if (j < size %26amp;%26amp; queue[j] j++; ># FO0R
if (queue[k]>queue[j]) file://不用交换 \0%)eJ
break; K*uFqdLL!
SortUtil.swap(queue,j,k); vkmTd4g
k = j; *uYnu|UQH
} kc&>l(
} MpbH!2J
private void fixUp(int k) { TGxspmY6
while (k > 1) { #4h_(Y
int j = k >> 1; |]7z
if (queue[j]>queue[k]) :0BaEqX
break; ZoJ:4uo N`
SortUtil.swap(queue,j,k); -a`EL]NX
k = j; *#j+,q!X
} s&S8P;K|
} 7&G[mOx0
EUdu"'=4a
} b&uo^G,
y}jX/Ln
} }G$rr.G
x;NCW
SortUtil： [V`j@dV
zR)|%[sWwQ
package org.rut.util.algorithm; OuIoO
WXj}gL`
import org.rut.util.algorithm.support.BubbleSort; (;=:QjaoZ
import org.rut.util.algorithm.support.HeapSort; |Ia3bVW
import org.rut.util.algorithm.support.ImprovedMergeSort; |RQ19m@
import org.rut.util.algorithm.support.ImprovedQuickSort; />fy@nPl|
import org.rut.util.algorithm.support.InsertSort; 2Mx9Kd'a r
import org.rut.util.algorithm.support.MergeSort; Yo:l@(
import org.rut.util.algorithm.support.QuickSort; Oqzz9+
import org.rut.util.algorithm.support.SelectionSort; y|!%C-P
import org.rut.util.algorithm.support.ShellSort; GW$(E*4q
<Gzy*1Q&
/** ^=Rqa \;
* @author treeroot 'UO,DFq[Fl
* @since 2006-2-2 #ej^K |Qx
* @version 1.0 za7h.yK}
*/ pYV$sDlD
public class SortUtil { .E|Hk,c9
public final static int INSERT = 1; ,J?Hdy:R
public final static int BUBBLE = 2; cOra`7L`
public final static int SELECTION = 3; "iE9X.6NMu
public final static int SHELL = 4; sqHvrI
public final static int QUICK = 5; ann!"s_
public final static int IMPROVED_QUICK = 6; QZk:G+$
public final static int MERGE = 7; vrXmzq
public final static int IMPROVED_MERGE = 8; kNfqdCF{P
public final static int HEAP = 9; th8f
ZjY_AbD
public static void sort(int[] data) { 2XrPgq'
sort(data, IMPROVED_QUICK); UwY<3ul
} /zn|?Y[
private static String[] name={ i%H_ua
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /_E:sI9(
}; cH6ie?KvAo
VP=(",`
private static Sort[] impl=new Sort[]{ 9}kN9u
new InsertSort(), ZC3b9:tk
new BubbleSort(), dC@aQi6{6
new SelectionSort(), Ojp)OeF\
new ShellSort(), 8%JxXtWW`
new QuickSort(), UiS9uGj
new ImprovedQuickSort(), w.J[3m/
new MergeSort(), -yeQQ4b
new ImprovedMergeSort(), 5bFE;Y;
new HeapSort() 0Mt2Rg}
}; [8.ufpZ
8 f%@:}H
public static String toString(int algorithm){ c\UVMyE
return name[algorithm-1]; |x["fWK
} ]CH@T9d5V
/ee:GjUkB
public static void sort(int[] data, int algorithm) { noe1*2*TE
impl[algorithm-1].sort(data); 8YraW|H
} #/@U|g
C.s{&
public static interface Sort { P]T(I/\g
public void sort(int[] data); 9}`O*A=KC
} mp0p#8txi
tC\x9&:
public static void swap(int[] data, int i, int j) { oT&JQ,i[2Q
int temp = data; 5/DTE:M<
data = data[j]; q#v.-013r
data[j] = temp; @8Drhx
} j>eL&.d
} #h ;j2