[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|?$F*bs
} :\!D 6\o6
int i1=l; Yk;-]qi7
int i2=mid+1; jOkc'
for(int cur=l;cur<=r;cur++){ ,A$#gLyk<
if(i1==mid+1) J?oI%r7^
data[cur]=temp[i2++]; w5C$39e\G
else if(i2>r) m;_gNh8Ee
data[cur]=temp[i1++]; >)Udb//
else if(temp[i1] data[cur]=temp[i1++]; 6KvoHo
else wjq;9%eXk
data[cur]=temp[i2++]; Fjs:rZ#{
} KF4D)NM|
} ax.;IU
%>z4hH,
} %9q]
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改进后的归并排序: v>XAzA
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package org.rut.util.algorithm.support; yt5Sy
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import org.rut.util.algorithm.SortUtil; Rudj"OGO
xJ$/#UdP
/** ; ,vGw<|o
* @author treeroot ;u(#-C2^{l
* @since 2006-2-2 .83{NF
* @version 1.0 Cr7T=&L
*/ 6YHQ/#'G~
public class ImprovedMergeSort implements SortUtil.Sort { 5 O't-'
<UEta>jj
private static final int THRESHOLD = 10; Daw;6f:
@QN(ouqQ
/* A_y]6~Mu?~
* (non-Javadoc) Nf]h8d~
* [$Dzf<0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /e:kBjysJ
*/ |]Eli%mNe
public void sort(int[] data) { F3?PlH:Y
int[] temp=new int[data.length]; kS7`g A
mergeSort(data,temp,0,data.length-1); QX`T-)T e
} nxjP4d>
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private void mergeSort(int[] data, int[] temp, int l, int r) { f?qp*
int i, j, k; {^T_m)|n
int mid = (l + r) / 2; j;MQ_?"iN
if (l == r) L0Ycf|[s,
return; +W%3VV$
if ((mid - l) >= THRESHOLD) %tE#%;Z
mergeSort(data, temp, l, mid); 4:I'zR5
else ^pysoaZCT_
insertSort(data, l, mid - l + 1); svaclkT=
if ((r - mid) > THRESHOLD) *y0=sG1+D
mergeSort(data, temp, mid + 1, r); m]?C @ina
else .eHOG]H
insertSort(data, mid + 1, r - mid); :~{Nf-y0`1
Hrg~<-.La
for (i = l; i <= mid; i++) { ;:]#Isq
temp = data; 3J_BuMV
} (-[73v-w
for (j = 1; j <= r - mid; j++) { 4Zn"K}q
temp[r - j + 1] = data[j + mid]; tkX?iqKQ
} obz|*1M?
int a = temp[l]; ubQbEv{(,
int b = temp[r]; WAUgbImc{
for (i = l, j = r, k = l; k <= r; k++) { Xl %ax!/
if (a < b) { ?'IY0^
data[k] = temp[i++]; c-y`Hm2"
a = temp; '@{Mq%`
} else { k d9<&.y{
data[k] = temp[j--]; fZtuP1-4
b = temp[j]; k0v&U@+-J
} fe4Ki
} h]jy):9L
} a;h.I}*]
V#,jUH|
/** wj{[g^y%
* @param data >+FaPym
* @param l vveL|j
* @param i .Cz9?]jyI
*/ _+6aD|7x
private void insertSort(int[] data, int start, int len) { ~QngCg-5q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Fl}{"eCF8
} <}Hs@`jS
} n)uck5
} i}gsxq%
} KK';ho,W
O63:t$Yx#
堆排序： UbEK2&q/8
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package org.rut.util.algorithm.support; asZ(Hz%
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import org.rut.util.algorithm.SortUtil; \(&UDG$
GWa:C\YK
/** ?0x=ascP
* @author treeroot -d4|EtN
* @since 2006-2-2 H7{I[>:
* @version 1.0 $]<wQH/?_
*/ ]99@Lf[^f
public class HeapSort implements SortUtil.Sort{ EdTR]}8
B2^*Sr[
/* (non-Javadoc) ^oMdx2Ow#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T9\G,;VQ7/
*/ DS|q(O=7~t
public void sort(int[] data) { [T(`+ #f
MaxHeap h=new MaxHeap(); O8k+R@
h.init(data); FaLc*CU
for(int i=0;i h.remove(); s4[PwD
System.arraycopy(h.queue,1,data,0,data.length); <lgX=wx L
} vLs*}+f
c->.eL%
private static class MaxHeap{ (b8ZADI*
rHp2I6.0a
void init(int[] data){ ECk* H
this.queue=new int[data.length+1]; [.'9Sw
for(int i=0;i queue[++size]=data; \A 5Na-/9
fixUp(size); o/hj~;(]
} VZ$^:.I0
} |c[= V?AC
ctMH5"F&1
private int size=0; -BC`p 8
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private int[] queue; \YPvpUg
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public int get() { <!q_C5>XJ
return queue[1]; oV'G67W
} I+/fX0-Lib
:E.T2na
public void remove() { fb8)jd'~}O
SortUtil.swap(queue,1,size--); !;Vqs/E
fixDown(1); X?.tj Z,
} w/e?K4
file://fixdown >o1,Y&
private void fixDown(int k) { uvl>Z= "
int j; 2j&0U!DX
while ((j = k << 1) <= size) { M.67[Qj~"u
if (j < size %26amp;%26amp; queue[j] j++; $DW__h
if (queue[k]>queue[j]) file://不用交换 no(or5UJ
break; @~bP|a
SortUtil.swap(queue,j,k); LT#EYnG
k = j; 3<>DDY2bl
} "j8`)XXa(
} 0"{-<Wot}
private void fixUp(int k) { Z~]G+(
while (k > 1) { )|6OPR@(#/
int j = k >> 1; _%u t#
if (queue[j]>queue[k]) gh `]OxA
break; \ #N))gAQ
SortUtil.swap(queue,j,k); ^p~QHS/
k = j; i`5Skr:M
} &Qmb?{S0
} tYp 185
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} ]Pe8G(E!
)jjL'
} yN/g;bQ
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SortUtil： Vqr]Ui
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package org.rut.util.algorithm; jLn|zK
!JtM`x/yR
import org.rut.util.algorithm.support.BubbleSort; YjiMUi\V
import org.rut.util.algorithm.support.HeapSort; _ glB<r$
import org.rut.util.algorithm.support.ImprovedMergeSort; =>XjChM
import org.rut.util.algorithm.support.ImprovedQuickSort; yO` |X
import org.rut.util.algorithm.support.InsertSort; >T)tAZ?WK
import org.rut.util.algorithm.support.MergeSort; s Fx0
import org.rut.util.algorithm.support.QuickSort; 9)>+r6t
import org.rut.util.algorithm.support.SelectionSort; ECk3Da
import org.rut.util.algorithm.support.ShellSort; ]xGpN ]u
niyI$OC
/** "m`}J*s"
* @author treeroot /VD[:sU7
* @since 2006-2-2 UrO&K]Z
* @version 1.0 S`Z[MNY
*/ NA$%Up
public class SortUtil { ipE|)Ns
public final static int INSERT = 1; [?bq4u`
public final static int BUBBLE = 2; U6.hH%\}@
public final static int SELECTION = 3; v'm-A d+4t
public final static int SHELL = 4; yxi&80$
public final static int QUICK = 5; _WZ{i,
public final static int IMPROVED_QUICK = 6; sR^b_/ElxT
public final static int MERGE = 7; Z3U%Afl2{
public final static int IMPROVED_MERGE = 8; 3WpQzuHPT
public final static int HEAP = 9; 5uV_Pkb?8
w'9!%mr
public static void sort(int[] data) { RL[F 9g
sort(data, IMPROVED_QUICK); xo4lM
} v\E6N2.S
private static String[] name={ <zm:J4&>T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jX0^1d@
}; <fE^S
R@#xPv4o%
private static Sort[] impl=new Sort[]{ eVd:C8q
new InsertSort(), WcY$=\7
new BubbleSort(), P)Rq\1:
new SelectionSort(), HL-'\wtl
new ShellSort(), NLu[<u U*
new QuickSort(), JXHf$k
new ImprovedQuickSort(), P/xEn_*v
new MergeSort(), uAs!5h
new ImprovedMergeSort(), (b.4&P"0
new HeapSort() UCj:]!P
}; _GM?`
ui-]%~
public static String toString(int algorithm){ ^CgN>-xZ?#
return name[algorithm-1]; MS:,I?
} Dp4x\97O
Bw~jqDZ}|
public static void sort(int[] data, int algorithm) { L9oLdWa(C
impl[algorithm-1].sort(data); 6&QOC9JW+7
} Lq2jXy5#n
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public static interface Sort { zG{jRth
public void sort(int[] data); i'.D=o
} XMz*}B6GQ
{Us^4Xe
public static void swap(int[] data, int i, int j) { B@S~v+Gr
int temp = data; |bhv7(_
data = data[j]; *>2e4j]
data[j] = temp; BHiG3fP
} ohs`[U=%~
} B`||4*