[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; JVR,Py:%G
} 9wdl1QS
int i1=l; /@Ec[4^=!.
int i2=mid+1; $[V-M\q
for(int cur=l;cur<=r;cur++){ Zmz $ hr
if(i1==mid+1) *;[g Ga~
data[cur]=temp[i2++]; v,d'SR.
else if(i2>r) 6h?)x
data[cur]=temp[i1++]; 98XlcI#
else if(temp[i1] data[cur]=temp[i1++]; 7mA:~-.u
else odKdpa Zc[
data[cur]=temp[i2++]; =[LUOOR*]
} c\OLf_Uf
} w5;d/r<q
>E9 k5
} 2?@Ozr2Uh
3|PV.
改进后的归并排序: sFw;P`
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package org.rut.util.algorithm.support; ,c|Ai(U
7)*q@
import org.rut.util.algorithm.SortUtil; *g"Xhk
ny1Dg$ui2
/** ^/)%s3
* @author treeroot 6iS7Hao"
* @since 2006-2-2 lBLL45%BIN
* @version 1.0 #N'bhs
*/ O?0`QMY
public class ImprovedMergeSort implements SortUtil.Sort { H%ScrJ#V
^G "Qp8 "
private static final int THRESHOLD = 10; CKX3t:HP0
*r ('A
/* 5kCXy$"%
* (non-Javadoc) **c"}S6:mC
* gp+@+i>b+[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?U =Mdw
*/ \uZ1Sl
public void sort(int[] data) { o ^ 08<
int[] temp=new int[data.length]; MjK<n[.
mergeSort(data,temp,0,data.length-1); `rV-,-r@
} k7]4TIUD*
kV4L4yE
private void mergeSort(int[] data, int[] temp, int l, int r) { h-U]?De5\
int i, j, k; fP 3t0cp
int mid = (l + r) / 2; #"C!-kS'=
if (l == r) +o35${
return; gUYTVp Vf
if ((mid - l) >= THRESHOLD) 0a1Mu>P,
mergeSort(data, temp, l, mid); 6XnUs1O
else 4}Lui9
insertSort(data, l, mid - l + 1); aO2zD<d
if ((r - mid) > THRESHOLD) T "#DhEM
mergeSort(data, temp, mid + 1, r); =F_j})O5
else 1B$8<NCQ=?
insertSort(data, mid + 1, r - mid); 8"rK
~*`wRiUhis
for (i = l; i <= mid; i++) { ($gmN 4
temp = data; g[;&_gL
} yM7FR);
for (j = 1; j <= r - mid; j++) { m8INgzVTC
temp[r - j + 1] = data[j + mid]; ZgmK~iJ
} C~PP}|<~V
int a = temp[l]; ,V''?@
int b = temp[r]; w^:@g~
for (i = l, j = r, k = l; k <= r; k++) { F4:5 >*:
if (a < b) { lB7/oa1]>
data[k] = temp[i++]; +e#(p<
a = temp; 2}_^~8
} else { W#kLM\2L
data[k] = temp[j--]; T n,Ifo3
b = temp[j]; 2 xi@5;!
} /FcwsD\=$
} !V/p.O
} b+BX >$
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/** lPz5.(5'
* @param data |8\et
* @param l XsMETl"Av4
* @param i S7CD#Y[s
*/ X<H+Z2d
private void insertSort(int[] data, int start, int len) { w Qp{z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >*}m.'u
} a0 w
} >k u7{1)
} {1GIiP-U
} 2f9%HX(5
C}]rx{xC
堆排序： G""=`@
dr4m}v.
package org.rut.util.algorithm.support; y(Q.uYz*
cp+eh
import org.rut.util.algorithm.SortUtil; iLFhm4.PO
*Rj*%S
/** |CjdmQ u
* @author treeroot !|#1z}(
* @since 2006-2-2 1;+(HB
* @version 1.0 v=+>ids
*/ ]&L[]
public class HeapSort implements SortUtil.Sort{ , pr ",=
$h'>Zvf
/* (non-Javadoc) B4# gT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \"A~ks~
*/ H3o Um1
public void sort(int[] data) { %MN>b[z
MaxHeap h=new MaxHeap(); t`A5wqm
h.init(data); vlZ?qIDe
for(int i=0;i h.remove(); [2ZZPY9?Q
System.arraycopy(h.queue,1,data,0,data.length); TM$`J
} ` _]tN
m2Q#ATLW
private static class MaxHeap{ L+"5g@
ZD]5"oHY
void init(int[] data){ Z9 tjo1X
this.queue=new int[data.length+1]; 2<5s0GT'/
for(int i=0;i queue[++size]=data; ^'aMp}3iu
fixUp(size); 1rhQ{6
} <lVW;l7
} c-^\YSDMN
g\ p;
private int size=0; fj])
FA;uu\
private int[] queue; >9wEx[
P(za8l>
public int get() { ~4+=C\r
return queue[1]; AW:WDNQh8n
} `;!v<@:i2
`ynD-_fTN
public void remove() { G@igxnm}
SortUtil.swap(queue,1,size--); u4[3JI>
fixDown(1); N!F ;!
} YWPAc>uw,
file://fixdown 9:tKRN_D
private void fixDown(int k) { 3YF*TxKx
int j; <ib#PLRM
while ((j = k << 1) <= size) { Yj^n4G(h
if (j < size %26amp;%26amp; queue[j] j++; /Hl]$sJY
if (queue[k]>queue[j]) file://不用交换 nAJ<@a
break; &Rx-zp&dJ
SortUtil.swap(queue,j,k); SD^6ib/]b
k = j; T6ajWUw
} D=nuK25
} %Ot^G%34
private void fixUp(int k) { DKfw8"L]
while (k > 1) { 7.PG*q
int j = k >> 1; :n&n"`D~
if (queue[j]>queue[k]) tc'`4O]c8
break; 8j}CP
SortUtil.swap(queue,j,k); cO"7wgg
k = j; r9@Q="J_)
} X,<n|zp
} %Ln7{w
*@r)3
} .)>DFGb>H
h@"dpmpe
} H`$s63
6XO%l0dC.
SortUtil： gekW&tRie
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package org.rut.util.algorithm; bgqN&J)Jr)
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import org.rut.util.algorithm.support.BubbleSort; 3/>McZ@OH
import org.rut.util.algorithm.support.HeapSort; Axhe9!Fm
import org.rut.util.algorithm.support.ImprovedMergeSort; $[}31=0
import org.rut.util.algorithm.support.ImprovedQuickSort; c~b[_J)
import org.rut.util.algorithm.support.InsertSort; K& <|94_k
import org.rut.util.algorithm.support.MergeSort; #IA[erf:
import org.rut.util.algorithm.support.QuickSort; {f3)!Pei`J
import org.rut.util.algorithm.support.SelectionSort; 5Jd&3pO
import org.rut.util.algorithm.support.ShellSort; cPi 3UjY~
!`hjvJryw
/** R8F[ 7&(
* @author treeroot *TVr| to
* @since 2006-2-2 mm'n#%\G
* @version 1.0 `MlQPLH
*/ 2)h i(
public class SortUtil { "'p:M,:
public final static int INSERT = 1; !>Db
public final static int BUBBLE = 2; t8\F7F P
public final static int SELECTION = 3; 2PE|4zG
public final static int SHELL = 4; mEv<r6qDT
public final static int QUICK = 5; vXLiYWo
public final static int IMPROVED_QUICK = 6; ?P,z^
public final static int MERGE = 7; f%` =>l
public final static int IMPROVED_MERGE = 8; wAkpk&R
public final static int HEAP = 9; }|%dN*',
Oj\lg2Ck
public static void sort(int[] data) { @X?DHLM
sort(data, IMPROVED_QUICK); m"<0sqD;
} WW\u}z.QJ
private static String[] name={ lPSyFb"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3ox%1x NA
}; MzL^u8
K>l$Y#x}k
private static Sort[] impl=new Sort[]{ t,M_
new InsertSort(), @AaM]?=P{
new BubbleSort(), ' 7+x,TszI
new SelectionSort(), )UbPG`x8
new ShellSort(), FlGU1%]m
new QuickSort(), G%^jgr)
new ImprovedQuickSort(), IR;l{q&`
new MergeSort(), SW5V:|/
new ImprovedMergeSort(), (rqc_ZU5
new HeapSort() 'L?e)u.
}; r5 tn'
;\j7jz^uC
public static String toString(int algorithm){ B-^r0/y;
return name[algorithm-1]; '&hz*yk
} \4Uhc3
?M!Mb-C[
public static void sort(int[] data, int algorithm) { A,67)li3
impl[algorithm-1].sort(data); ~_Q~AOFM
} 4> k"$l/:
V=^B7a.;>
public static interface Sort { 4`yE'%6.}
public void sort(int[] data); ;)~}/nR<a
} JLd-{}A""-
fi%)520
public static void swap(int[] data, int i, int j) { GuK3EM*_
int temp = data; "&Hr)yyWG
data = data[j]; SR%k|YT
data[j] = temp; y0vJ@ %`
} #[f]-c(!
} {zX]41T