[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; m[xl)/e
} ;+XrCy!.)L
int i1=l; ss%,
int i2=mid+1; pWKE`x^
for(int cur=l;cur<=r;cur++){ ;ZUj2WxE
if(i1==mid+1) Ez~5ax7x
data[cur]=temp[i2++]; "7y,d%H
else if(i2>r) d^A]]Xg
data[cur]=temp[i1++]; T='uqKW\
else if(temp[i1] data[cur]=temp[i1++]; V3ozaVk;
else u ,3B[
data[cur]=temp[i2++]; W9]z]6
} AC1RP`c
} \4wMv[;7
`sqr>QD
} >\[]z^J
OiQf=Uz\
改进后的归并排序: U.,S.WP+d
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package org.rut.util.algorithm.support; E>s+"y
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import org.rut.util.algorithm.SortUtil; pZ'q_Oux
\"(?k>]E
/** iGhvQmd(/*
* @author treeroot qZ^ PC-
* @since 2006-2-2 'wEQvCS
* @version 1.0 <z\SKR[
*/ ]TT >3"Dw7
public class ImprovedMergeSort implements SortUtil.Sort { ,5v'hG
=xm7i#1
private static final int THRESHOLD = 10; U\Vg&"P
@ &N
/* P6.PjK!Ar
* (non-Javadoc) 9oJM?&i
* <b H*f w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nC p/.]Y*
*/ 'Wnh1|z
public void sort(int[] data) { $6mShp9(
int[] temp=new int[data.length]; *@''OyL
mergeSort(data,temp,0,data.length-1); Mc.{I"c@
} |gI>Sp%Fu
xg/(
private void mergeSort(int[] data, int[] temp, int l, int r) { uQvTir*e
int i, j, k; .4\I?
int mid = (l + r) / 2; I}bu
if (l == r) f;^ +q-Q
return; _ +DL
if ((mid - l) >= THRESHOLD) r%f Q$q>
mergeSort(data, temp, l, mid); %]}JWXof
else :|s;2Y
insertSort(data, l, mid - l + 1); C33Jzn's
if ((r - mid) > THRESHOLD) T"{~mQ*
mergeSort(data, temp, mid + 1, r); kMCP .D45;
else :Q DkaA
insertSort(data, mid + 1, r - mid); THhxj)
_y[C52,
for (i = l; i <= mid; i++) { R 9`[C
temp = data; zN!W_2W*
} + )Qu,%2
for (j = 1; j <= r - mid; j++) { _">F]ptI;
temp[r - j + 1] = data[j + mid]; UDr1t n
} v_5qE
int a = temp[l]; x t-s"A
int b = temp[r]; +@?Q"B5u}
for (i = l, j = r, k = l; k <= r; k++) { >`UqS`YQK
if (a < b) { m8F$h-
data[k] = temp[i++]; Ag9GYm
a = temp; aeUgr!
} else { 6d]4 %QT
data[k] = temp[j--]; HSNj
b = temp[j]; ;SU<T^a
} ^slIR!L
} LSc^3=X
} 8_!qoW@B
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/** ?I^$35
* @param data Bbs1U
* @param l 0]7jb_n1
* @param i CmBPCjh
*/ ^$P_B-C N
private void insertSort(int[] data, int start, int len) { C{/U;Ie-b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #).^k-
} u!D?^:u=)
} a?+C]u?_D
} ;>Z+b#C[
} y_Lnk=Q ^
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堆排序： ]2m=lt1
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package org.rut.util.algorithm.support; Z~Q5<A9Jz
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import org.rut.util.algorithm.SortUtil; \(Rj2
d~QKZ&jf
/** acS~%^"<_
* @author treeroot sC\?{B0r
* @since 2006-2-2 tZ[9qms^_
* @version 1.0 d[l8qaD
*/ pP.`+vPi
public class HeapSort implements SortUtil.Sort{ (9]1p;
|u%;"N'p)
/* (non-Javadoc) ,]0BmlD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E|;>!MMA;
*/ S*G^U1Sc+
public void sort(int[] data) { ,|RKM
MaxHeap h=new MaxHeap(); i}8OaX3x
h.init(data); poafGoH-Y
for(int i=0;i h.remove(); E'{:HX
System.arraycopy(h.queue,1,data,0,data.length); uB"B{:Kz
} .>;??BG}
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private static class MaxHeap{ \"ogQnmz
q0%QMut%
void init(int[] data){ Pxf>=kY
this.queue=new int[data.length+1]; =M?+KbTJ3
for(int i=0;i queue[++size]=data; }R+#>P
fixUp(size); Z#u{th
} q'S[TFMNE
} $)*qoV
A v>v\ :.>
private int size=0; | t:UpP
uSXnf
private int[] queue; 3_wR2AU~
OH>Gc-V
public int get() { G!VEV3zT
return queue[1]; y$fMMAN7
} W3/] 2"0
]+,L/P
public void remove() { DC).p'0VL
SortUtil.swap(queue,1,size--); 2<UC^vZ
fixDown(1); 6k@F?qHS
} ]/h$6mrL
file://fixdown L=;T$4+p
private void fixDown(int k) { FUSe!f
int j; nL^7t7mp
while ((j = k << 1) <= size) { $'CS/U`E}
if (j < size %26amp;%26amp; queue[j] j++; r ts2Jk7f
if (queue[k]>queue[j]) file://不用交换 4j0;okQWV'
break; 8cZ[Kl%
SortUtil.swap(queue,j,k); g \S6>LG!
k = j; F\&wFA'J
} 56YqYu.
} ='.b/]!_
private void fixUp(int k) { vxf09v{-
while (k > 1) { ABoB=0.l
int j = k >> 1; Fp?M@
if (queue[j]>queue[k]) #@YKNS[
break; zK~_e\m
SortUtil.swap(queue,j,k); j8Q_s/n
k = j; Heqr1btK
} |a])o
} yT<"?S>D
n'vdA !R
} GBZu<t/
m==DBh
} z+oy#p6+F.
7~"eT9WV
SortUtil： *lZ V3F
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package org.rut.util.algorithm; q}jh>`d
xC +>R1)
import org.rut.util.algorithm.support.BubbleSort; VXk[p
import org.rut.util.algorithm.support.HeapSort; lrkgsv6
import org.rut.util.algorithm.support.ImprovedMergeSort; LsGO~EiJ
import org.rut.util.algorithm.support.ImprovedQuickSort; 3`D*AFQc
import org.rut.util.algorithm.support.InsertSort; `;G@qp:A
import org.rut.util.algorithm.support.MergeSort; a"4X7 D+
import org.rut.util.algorithm.support.QuickSort; 21<Sfsc$
import org.rut.util.algorithm.support.SelectionSort; C+!=C{@7di
import org.rut.util.algorithm.support.ShellSort; Y[b08{/
.(p_YjIA
/** P;XA|`&
* @author treeroot kn$SG
* @since 2006-2-2 Ot=nKdP}D
* @version 1.0 {gEz;:!):
*/ l(QntP
public class SortUtil { (i{ZxWW&
public final static int INSERT = 1; qldm"Ul
public final static int BUBBLE = 2; PU\xFt
public final static int SELECTION = 3; 3r^||(_u
public final static int SHELL = 4; j?tE#
public final static int QUICK = 5; +5O^{Ce6
public final static int IMPROVED_QUICK = 6; $pPc}M[h
public final static int MERGE = 7; &)q>Z!C-l
public final static int IMPROVED_MERGE = 8; ^Hf?["m^@
public final static int HEAP = 9; <aFB&Fm
, DuyPBAms
public static void sort(int[] data) { W4qT]m
sort(data, IMPROVED_QUICK); F{ 4k2Izr
} XpKeN2=p
private static String[] name={ 3^H-,b0^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qOD^P
}; w=nS*Qy2
]GHw~s?
private static Sort[] impl=new Sort[]{ !6taOT>v
new InsertSort(), s 64@<oU<"
new BubbleSort(), &`!H1E^
new SelectionSort(), \ D>!&
new ShellSort(), x^`P[>
new QuickSort(), C.u)2[(
new ImprovedQuickSort(), USgO`l\}4
new MergeSort(), p+nB@fN/
new ImprovedMergeSort(), ae0Mf0<#)
new HeapSort() R-iWbLD
}; SdI>
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public static String toString(int algorithm){ bB/fU7<{)u
return name[algorithm-1]; 66WJ=?JV
} BUL<FTg
Cvt/ot-J?
public static void sort(int[] data, int algorithm) { F`gK6;zp
impl[algorithm-1].sort(data); ER!s
} jX$U)O
lUnC+w#[
public static interface Sort { nYC S %\"
public void sort(int[] data); ?:vB_@
} r<dvo%I#|
~}D"8[ABj
public static void swap(int[] data, int i, int j) { ?*q-u9s9
int temp = data; rV%;d[LB
data = data[j]; MnY}U",
data[j] = temp; './qBJ
} $Vs5d=B
} 8v^AVg