[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; Kxz|0l
} !;hp
int i1=l; UISsiiG(
int i2=mid+1; @L0)k^:
for(int cur=l;cur<=r;cur++){ |L:X$oM
if(i1==mid+1) Fdq5:v?k
data[cur]=temp[i2++]; J |UFuD
else if(i2>r) S-</(,E}|
data[cur]=temp[i1++]; | qelvK*
else if(temp[i1] data[cur]=temp[i1++]; )ZFc5m^+u
else DnW/q
data[cur]=temp[i2++]; &FYv4J
} `~41>mM%
} &!M6{O=~
Rtl1eJ-
} JeA_mtSQ|
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改进后的归并排序: 3*(><<ZC
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package org.rut.util.algorithm.support; ziM@@$.F
kmtkh"
import org.rut.util.algorithm.SortUtil; Z5EII[=$o
^gR~~t;@
/** ;lhW6;oI'
* @author treeroot P6=5:-Hh
* @since 2006-2-2 aH8]$e8_,\
* @version 1.0 ;W FiMM\
*/ ez5>V7Y
public class ImprovedMergeSort implements SortUtil.Sort { yMD0Tj5ZQ
/V#?d
private static final int THRESHOLD = 10; +V[;DOlll
'Z#>K*
/* -C!m#"PDW
* (non-Javadoc) /WK1(B:
* wByTNA7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V-X Ty iv
*/ pqju@FD*
public void sort(int[] data) { D>Rlm,U
int[] temp=new int[data.length]; '- #QK'p
mergeSort(data,temp,0,data.length-1); G-sQL'L[U
} %mzDmrzq
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private void mergeSort(int[] data, int[] temp, int l, int r) { Re'3bs:+
int i, j, k; soX^$l
int mid = (l + r) / 2; q]SH'Wd
if (l == r) :1@jl2,
return; kr!>rqN5
if ((mid - l) >= THRESHOLD) N3oa!PE
mergeSort(data, temp, l, mid); !:tr\L {
else I#7H)^us
insertSort(data, l, mid - l + 1); D-x*RRkpp
if ((r - mid) > THRESHOLD) Ra:UnA
mergeSort(data, temp, mid + 1, r); vmo!
else [ <k&]Kv
insertSort(data, mid + 1, r - mid); `G:hC5B
t\Qm2Q)>
for (i = l; i <= mid; i++) { Vh]=sd<F
temp = data; X gtn}7N.
} L;+e)I]
for (j = 1; j <= r - mid; j++) { uX&h~qE/
temp[r - j + 1] = data[j + mid]; lZ <D,&
} pigu]mj
int a = temp[l]; SxcE@WM
int b = temp[r]; 8E9k7
for (i = l, j = r, k = l; k <= r; k++) { CoWT
if (a < b) { &SPr#OkW
data[k] = temp[i++]; ilZ5a&X;
a = temp; !0):g/2h
} else { &+H\ST(/
data[k] = temp[j--]; I'N!j>5oX
b = temp[j]; BuxU+
} 'AmA3x)9u
} y$6EEp
} Y/pK
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/** .SOCWznb
* @param data |W&K@g$
* @param l EZhk(LE
* @param i mGoC8t}iP
*/ mD*!<<Sw
private void insertSort(int[] data, int start, int len) { P4c}@Mq3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bQI.Qk
} w6^TwjjZ$
} (Fq]y5
} oU*e=uehj
} Y ._Om}H
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堆排序： C]ax}P>BQ
x@pzgqi3
package org.rut.util.algorithm.support; =CCddLO
mJH4M9WJ]
import org.rut.util.algorithm.SortUtil; [[]NnWJ
LJt5?zQKrW
/** Lw?>1rTT/
* @author treeroot &._Mh
* @since 2006-2-2 t$R0UprK
* @version 1.0 w[)HQ1K
*/ DQ0 UY
public class HeapSort implements SortUtil.Sort{ GpR,n2
?}u][akM
/* (non-Javadoc) '[HU!8F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n:H |=SF{
*/ %z"$?Iv
public void sort(int[] data) { kb~ 9/)~g
MaxHeap h=new MaxHeap(); kY'C'9p
h.init(data); q>6,g>I
for(int i=0;i h.remove(); dKw[#(m5v
System.arraycopy(h.queue,1,data,0,data.length); %uo#<Ny/ I
} c^5fhmlt
k9VWyq__
private static class MaxHeap{ ]J/;Xp
6k+tO%{~
void init(int[] data){ !L/.[:X
this.queue=new int[data.length+1]; (+BrC`
for(int i=0;i queue[++size]=data; f;&XTF5D^
fixUp(size); vH E:TQo4
} uD ;T
} eq9qE^[Z&
:cP u
private int size=0; Dr}elR>~G=
SLvo)`Nc3-
private int[] queue; x@>~&eP
8%MF<
public int get() { N;=J)b|9
return queue[1]; IQmlmu
} 8. %g&%S
=2}bQW
public void remove() { `1FNs?j
SortUtil.swap(queue,1,size--); {%\;'&@z\
fixDown(1); ax2#XSCO
} >F/E,U ]
file://fixdown RGY#0.Z}
private void fixDown(int k) { a"k,x-EL(
int j; :U @L$
while ((j = k << 1) <= size) { e >7Ka\
if (j < size %26amp;%26amp; queue[j] j++; y35e3
if (queue[k]>queue[j]) file://不用交换 x3jjtjf
break; 0zA:?}
SortUtil.swap(queue,j,k); \z.p [;'ir
k = j; 5yroi@KT
} 5iGz*_ m
} 'sk M$jr
private void fixUp(int k) { s>TC~d82
while (k > 1) { *r6v9
int j = k >> 1; ^[2siG
if (queue[j]>queue[k]) BfW@f
break; X{h[
SortUtil.swap(queue,j,k); H;FzWcm
k = j; 9HlM0qE5b
} hm1.UE
} owO&[D/
pT;xoe
} gf8~Zlq4v
X: Be'
} 4%u\dTg/B
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SortUtil： $@WA}\D
3BB/u%N}
package org.rut.util.algorithm; g_"B:DR
@ZcI]G%
import org.rut.util.algorithm.support.BubbleSort; %V-Hy;V
import org.rut.util.algorithm.support.HeapSort; JS&;7Z$KX
import org.rut.util.algorithm.support.ImprovedMergeSort; }7qboUGe
import org.rut.util.algorithm.support.ImprovedQuickSort; 8: VRq
import org.rut.util.algorithm.support.InsertSort; k{^iv:
import org.rut.util.algorithm.support.MergeSort; mDA1$fj"
import org.rut.util.algorithm.support.QuickSort; :&s8G*
import org.rut.util.algorithm.support.SelectionSort; 9}d^ll&
import org.rut.util.algorithm.support.ShellSort; AxCFZf5
!@ )JqF.
/** *+J`Yk7}
* @author treeroot )fc+B_
* @since 2006-2-2 ' KNg;
* @version 1.0 BR~+CBH
*/ Q+E)_5_sA
public class SortUtil { =jRC4]M})
public final static int INSERT = 1; hOm0ND?;1
public final static int BUBBLE = 2; _P=L| U#C
public final static int SELECTION = 3; Gn%k#
public final static int SHELL = 4; k,r}X:<6jz
public final static int QUICK = 5; Ys@\~?ym+
public final static int IMPROVED_QUICK = 6; U H6 Jvt
public final static int MERGE = 7; R!:F}*
public final static int IMPROVED_MERGE = 8; 9]a!1
public final static int HEAP = 9; #23($CSE
=K9-
public static void sort(int[] data) { VQ4rEO=t
sort(data, IMPROVED_QUICK); U{3Pk0rZ
} <!~NG3KW[>
private static String[] name={ t\-;n:p-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qB3=wFI
}; )oMMDHw\
.wcKG9u
private static Sort[] impl=new Sort[]{ )AAPT7!U
new InsertSort(), XC[bEp$
new BubbleSort(), D(">bR)1
new SelectionSort(), G2FD'Sf
new ShellSort(), gCW {$d1=
new QuickSort(), Kd3EZo.
new ImprovedQuickSort(), bHmn0fZ9
new MergeSort(), OJ)XJL
new ImprovedMergeSort(), bN.U2%~!
new HeapSort() SHe547X1
}; Uy{ZK*c8i
V%n7h&\%
public static String toString(int algorithm){ Ly`FU)
return name[algorithm-1]; {tF)%>\#
} Y j*Y*LB~
9I*`~il>{
public static void sort(int[] data, int algorithm) { k\lU Q\/O5
impl[algorithm-1].sort(data); 8POLp9>X
} '8UhYwyr
qJEtB;J'
public static interface Sort { qJ<Ghd`8v
public void sort(int[] data); .oxeo0@~
} NC{8[*Kx5
4F?O5&329i
public static void swap(int[] data, int i, int j) { 0*8uo Wt&
int temp = data; teg[l-R"7z
data = data[j]; ~`o%Y"p%rv
data[j] = temp; G0pqiU6
} NUGiDJ+[
} .0#{?R,