[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; o8+ZgXct
} VvuwgJX
int i1=l; o9dqHm
int i2=mid+1; G1 ?."
for(int cur=l;cur<=r;cur++){ x!klnpGp
if(i1==mid+1) Y>KRI2](<
data[cur]=temp[i2++]; Qe=,EXf
else if(i2>r) ^dB~#A1
data[cur]=temp[i1++]; [h "*>J{
else if(temp[i1] data[cur]=temp[i1++]; OhmKjY/}
else uT8@p8
data[cur]=temp[i2++]; mzufl:-=
} Vv=/{31
} +I$c+WfU
M_tY:v
} 8spoDb.S
l[=7<F
改进后的归并排序: #s JE{Tb
> Y <in/
package org.rut.util.algorithm.support; +Hz});ix<
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import org.rut.util.algorithm.SortUtil; 8'Dp3x^W>
5'f4=J$Z)
/** 8$O=HE*
* @author treeroot V5y8VT=I
* @since 2006-2-2 ]M AB
* @version 1.0 )X{x\ /N
*/ u.( WW(/N
public class ImprovedMergeSort implements SortUtil.Sort { Dm=t`_DL8
D>9~JHB
private static final int THRESHOLD = 10; ^R* _Q,o#
@xKLRw
/* WPVur{?<
* (non-Javadoc) * z|i{=W F
* 1PWs">*(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dkTj KV
*/ )(~s-x^\z@
public void sort(int[] data) { KK;3<kX
int[] temp=new int[data.length]; 44bTx y
mergeSort(data,temp,0,data.length-1); ;cQhs7m(9
} /(C?3}}L
<V?M~u[7f
private void mergeSort(int[] data, int[] temp, int l, int r) { CJB
int i, j, k; VU+`yQp
int mid = (l + r) / 2; "&jA CI
if (l == r) }gL:"C"~
return; :uhU<H<,f
if ((mid - l) >= THRESHOLD) K_/8MLJQ
mergeSort(data, temp, l, mid); rU?sUm,ch
else 5/j7C>
insertSort(data, l, mid - l + 1); UhuEE
if ((r - mid) > THRESHOLD) PW(4-H
mergeSort(data, temp, mid + 1, r); N3?hyR<T
else 6?y<F4
insertSort(data, mid + 1, r - mid); FqQqjA
>]N}3J}47g
for (i = l; i <= mid; i++) { &u5OL?>
temp = data; :;[pl|}tM
} O@;;GJ
for (j = 1; j <= r - mid; j++) { b&:>v9U
temp[r - j + 1] = data[j + mid]; VwfeaDJw
} L:$kd `v[
int a = temp[l]; N@D]Q&;+(T
int b = temp[r]; 0zrgK;9
for (i = l, j = r, k = l; k <= r; k++) { V1Yab#
if (a < b) { P:GAJ->;]>
data[k] = temp[i++]; {"Xn`@Y
a = temp; t']d_Vcza
} else { 6&8([J
data[k] = temp[j--]; %LBa;M
b = temp[j]; 9>gxJ7pY
} nx#0*r}5
} *1FDK{
} 4.7YIM
p=F!)TnJN
/** 2'O2n]{
* @param data RbPD3&.
* @param l <A{|=2<
* @param i cj ?aCVa
*/ l-;u*JA
private void insertSort(int[] data, int start, int len) { }DH3_M!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); USF9sF0l
} &PY~m<F
} R*Jnl\?>@
} =T_E]>FF9
} 8 xfn$
sVdn>$KXk
堆排序： U^qQ((ek
XO[S(q
package org.rut.util.algorithm.support; O~3<P3W
f3,qDbQyJ
import org.rut.util.algorithm.SortUtil; ]=X6* E*/E
GYvD*?uBc
/** @VdkmqXz
* @author treeroot x`7Ch3`4}
* @since 2006-2-2 JmMB=} <
* @version 1.0 MNC=r?
*/ _=%F6}TE
public class HeapSort implements SortUtil.Sort{ g.L~Z1-
*\#/4_yB}
/* (non-Javadoc) ?vA)F)MS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8 $5 y]%!
*/ UA>3,|gV1
public void sort(int[] data) { \"]KF8c^_
MaxHeap h=new MaxHeap(); VT>TmfN(I
h.init(data); z@bq*':~J
for(int i=0;i h.remove(); o!6~tO=%
System.arraycopy(h.queue,1,data,0,data.length); rcq^mPdQ
} EY$Dtb+g8
DIqM\ ><
private static class MaxHeap{ RIC\f_Dv
KU]co4]8^s
void init(int[] data){ h#hx(5"6
this.queue=new int[data.length+1]; e>$d*~mwn
for(int i=0;i queue[++size]=data; Bb[WtT}=
fixUp(size); GGM|B}U p
} |Do+=Gr$t@
} 3!l+)g
DB~3(r?K
private int size=0; $ol]G`+
8+f{ /
private int[] queue; rCK
y ;/T.W9!
public int get() { fMpxe(
return queue[1]; -1_WE/Ps
} hqXp>.W
jo-2D[Q{
public void remove() { &6feR#~A
SortUtil.swap(queue,1,size--); kk`K)PESi
fixDown(1); <<=.;`(/v
} ^ABtg#
file://fixdown IdS=lN$
private void fixDown(int k) { "L0Q"t:
int j; *5QN:
while ((j = k << 1) <= size) { JRw<v4pZ
if (j < size %26amp;%26amp; queue[j] j++; ; Sd== *
if (queue[k]>queue[j]) file://不用交换 \?D~&d,a=
break; exZgk2[0
SortUtil.swap(queue,j,k); 5gq
k = j; uIy$|N
} :' =le*h
} 3jqV/w[-
private void fixUp(int k) { |EGC1x]j=
while (k > 1) { WaPuJ5;e
int j = k >> 1; 4<j7F4
if (queue[j]>queue[k]) erQQ_
break; 7;I;(iY
SortUtil.swap(queue,j,k); Zv0'OX~8i
k = j; %{|67h
} %p(X*mVX
} ~} 02q5H
1`sTGNo
} h+c9FN
8DuD1hZq
} N;HG@B!m
y]okOEV0
SortUtil： ?$Dc>
k|^YYi=xF
package org.rut.util.algorithm; JLbmh1'
>g;995tG
import org.rut.util.algorithm.support.BubbleSort; 9+ A~(
import org.rut.util.algorithm.support.HeapSort; I&%KOe0
import org.rut.util.algorithm.support.ImprovedMergeSort; g5;Ig
import org.rut.util.algorithm.support.ImprovedQuickSort; c :2w(BVi
import org.rut.util.algorithm.support.InsertSort; r h c&#JS
import org.rut.util.algorithm.support.MergeSort; #Ibpf ,
import org.rut.util.algorithm.support.QuickSort; `< 82"cAT{
import org.rut.util.algorithm.support.SelectionSort; uqM=/T^A
import org.rut.util.algorithm.support.ShellSort; c 'rn8Jo}
^&lkh@Y1q
/** Eq=j+ch7
* @author treeroot goOw.~dZ'
* @since 2006-2-2 #l 6QE=:
* @version 1.0 gh-i|i,
*/ 'A,)PZL9i
public class SortUtil { #]h&GX
public final static int INSERT = 1; X>i{288M3
public final static int BUBBLE = 2; ;YZ'd"0v
public final static int SELECTION = 3; +} y"S-
public final static int SHELL = 4; FY)US>
public final static int QUICK = 5; &W}6Xg(
public final static int IMPROVED_QUICK = 6; F+]cFx,/
public final static int MERGE = 7; Cwl:
public final static int IMPROVED_MERGE = 8; i}O.,iH
public final static int HEAP = 9; YH&q5W,KX
hGcu(kAC,
public static void sort(int[] data) { l(HxZlHr
sort(data, IMPROVED_QUICK); :_h#A}8Xd
} G1Vn[[%k
private static String[] name={ CY\D.Eow
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xKkXr-yb`f
}; dwouw*8
'A9Z ((
private static Sort[] impl=new Sort[]{ _K B%g_{
new InsertSort(), "|BSGV!8
new BubbleSort(), t)mc~M9w
new SelectionSort(), J(SGaHm@
new ShellSort(), x2f=o|]D'
new QuickSort(), (o^?i2)g
new ImprovedQuickSort(), $$XeCPs0
new MergeSort(), 2$'bOo
new ImprovedMergeSort(), /I:&P Pff
new HeapSort() i]Bu7Fuu
}; Yq'D-$@
lx7]rkWo|a
public static String toString(int algorithm){ F##xVmR~
return name[algorithm-1]; TkVqv v
} 6Fc*&7Z+
%/d1x
public static void sort(int[] data, int algorithm) { 6ld /E
impl[algorithm-1].sort(data); UjMWSPEBy
} 1B@7#ozWA?
`fE'$2
public static interface Sort { '.jYu7
public void sort(int[] data); &A=c[pc
} .#Z"Sj
DG}s`'
public static void swap(int[] data, int i, int j) { :? s{@7
int temp = data; dkeMiLm
data = data[j]; ^9><qKbO
data[j] = temp; yb>R(y
} cI&XsnY
} ,N nh$F