[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; k"%~"9
} K7B/s9/xs
int i1=l; RLXL&
int i2=mid+1; ,-LwtePJ0
for(int cur=l;cur<=r;cur++){ NA`SyKtg_
if(i1==mid+1) Rok7n1gW
data[cur]=temp[i2++]; UgSB>V<?
else if(i2>r) Xl{P8L
data[cur]=temp[i1++]; HRCT}
else if(temp[i1] data[cur]=temp[i1++]; | j`@eF/"
else 8'[7 )I=
data[cur]=temp[i2++]; -Cpl?Io`r5
} eK=xrk
} re?,Wext\
/Iy]DU8
} SM#]H-3
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改进后的归并排序: oulVg];
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package org.rut.util.algorithm.support; DJ k/{Z:
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import org.rut.util.algorithm.SortUtil; 2;`1h[,-^
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/** /9*B)m"
* @author treeroot $9#H04.x
* @since 2006-2-2 n ATuD
* @version 1.0 J1|\Q:-7p
*/ 7kLz[N6Ll
public class ImprovedMergeSort implements SortUtil.Sort { 6vo;!V6
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private static final int THRESHOLD = 10; %nZo4hnr$r
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/* ]@c+]{
* (non-Javadoc) A RuA<vQ
* wk D^r(hiH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r'r%w#=`t
*/ :{v#'U/^
public void sort(int[] data) { 4jMFr,
int[] temp=new int[data.length]; 6 7.+ .2
mergeSort(data,temp,0,data.length-1); (zYtNLoFx
} `pa!~|p
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private void mergeSort(int[] data, int[] temp, int l, int r) { ZohCP
int i, j, k; _ QI\
int mid = (l + r) / 2; z+wA rPxc
if (l == r) !u[9a;Sa#
return; CS5?Ti6
if ((mid - l) >= THRESHOLD) 'RR~7h
mergeSort(data, temp, l, mid); '~<m~UXvD#
else #aJ(m&
insertSort(data, l, mid - l + 1); 81F/G5
if ((r - mid) > THRESHOLD) . B9iLI
mergeSort(data, temp, mid + 1, r); LVfF[
else DB|Y
insertSort(data, mid + 1, r - mid); U^%Q}'UYym
\;3~a9q%
for (i = l; i <= mid; i++) { jl$ece5v
temp = data; A]0 St@
} K~{$oD7!
for (j = 1; j <= r - mid; j++) { o3^l~iT
temp[r - j + 1] = data[j + mid]; `/XY>T}-
} :yr+vcD?
int a = temp[l]; e0zq1XcZ
int b = temp[r]; wLH>:yKUU
for (i = l, j = r, k = l; k <= r; k++) { bKY7/w<dP
if (a < b) { gIa+5\qYY
data[k] = temp[i++]; )3}9K ^jS
a = temp; ZRB)uA)5=
} else { nI-w}NQ
data[k] = temp[j--]; g"DG]/ev
b = temp[j]; *boR`[Ond
} SiRaFj4s"
} KIf dafRL
} gMmaK0uhS
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/** Y'S%O/$
* @param data -q1??u
* @param l 5h-SCB>P
* @param i Y0@"fU35
*/ GqvpA# i
private void insertSort(int[] data, int start, int len) { '&tG?gb&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zuad~%D<I
} T{.pM4Hd
} XbKYiy
} r&JgLC(
} 4y?n [/M/
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堆排序： p!7FpxZY
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package org.rut.util.algorithm.support; ,{u yG:
<I\/n<*
import org.rut.util.algorithm.SortUtil; Uw. `7b>B
wPd3F.<$
/** 3vN_p$
* @author treeroot ^R7lom.
* @since 2006-2-2 rdP[<Y9
* @version 1.0 4{U T!WIi
*/ gjwn7_
public class HeapSort implements SortUtil.Sort{ ^e_hLX\SW
x7&B$.>3
/* (non-Javadoc) wr/"yQA]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qZtzO2Mt
*/ FEz-+X<q2
public void sort(int[] data) { 3*"WG O5
MaxHeap h=new MaxHeap(); {0wIR_dGX
h.init(data); F3@phu${
for(int i=0;i h.remove(); %9F([K
System.arraycopy(h.queue,1,data,0,data.length); vjGo;+K
} |O\s|H
iAEbu&XG
private static class MaxHeap{ +US!YU
|&+o^
void init(int[] data){ W.f/pu
this.queue=new int[data.length+1]; x;P_1J%Q
for(int i=0;i queue[++size]=data; .\ULbN3Z
fixUp(size); d9fC<Tp
} XFHYQ2ME2
} yiXSYD
S]e|"n~@
private int size=0; _~l5u8{^6
WdH$JTk1
private int[] queue; ;>EM[u
{tuYs:
public int get() { #4Rx]zW^%
return queue[1]; 1QcNp(MO
} NdA[C|_8}f
~F|+o}a`
public void remove() { y1eWpPJa
SortUtil.swap(queue,1,size--); 3</_c1~
fixDown(1); [2!w_Iw'
} ) <[XtK
file://fixdown *eTqVG.
private void fixDown(int k) { X"|['t
int j; '6iEMg&3
while ((j = k << 1) <= size) { P6'1.R
if (j < size %26amp;%26amp; queue[j] j++; JW83Tp8[8
if (queue[k]>queue[j]) file://不用交换 h,u,^ r
break; PB\(=
SortUtil.swap(queue,j,k); B[Ku\A6&
k = j; gZ3u=uME
} Xv5wJlc!d
} Ct<udO
private void fixUp(int k) { _/s$ZCd
while (k > 1) { ^B.5GK)!
int j = k >> 1; p?%y82E
if (queue[j]>queue[k]) c \J:![x
break; ul6]!Iy
SortUtil.swap(queue,j,k); qdJ=lhHM}
k = j; ?4#Li~q
} F4-$~v@
} K*vt;L
In"ZIKaC
} ok"k*?Ov
KEo,m
} E1aHKjLQ
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SortUtil： a8e6H30Sm
oQ/E}Zk@
package org.rut.util.algorithm; ]KKS"0a
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import org.rut.util.algorithm.support.BubbleSort; T?CdZc.
import org.rut.util.algorithm.support.HeapSort; F`9xVnK=
import org.rut.util.algorithm.support.ImprovedMergeSort; lBLARz&c#
import org.rut.util.algorithm.support.ImprovedQuickSort; 'A=^Se`=
import org.rut.util.algorithm.support.InsertSort; t:x\kp
import org.rut.util.algorithm.support.MergeSort; b;B%q$sntC
import org.rut.util.algorithm.support.QuickSort; wtLO!=B
import org.rut.util.algorithm.support.SelectionSort; PFlNo` iO
import org.rut.util.algorithm.support.ShellSort; Gi|w}j_
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/** y4 #>X
* @author treeroot "rALt~AX
* @since 2006-2-2 })H wh).
* @version 1.0 ^qvZXb
*/ 1APe=tJ
public class SortUtil { aB2FC$z
public final static int INSERT = 1; 8+Lm's=W*
public final static int BUBBLE = 2; ~f&E7su-6+
public final static int SELECTION = 3; +/4A
public final static int SHELL = 4; V# }!-Xj
public final static int QUICK = 5; IYE~t
public final static int IMPROVED_QUICK = 6; ,B*EVN
public final static int MERGE = 7; [: n'k
public final static int IMPROVED_MERGE = 8; +5g_KS
public final static int HEAP = 9; &T?RZ2
oz\!V*CtK
public static void sort(int[] data) { K-^\" W8
sort(data, IMPROVED_QUICK); q5J5>
} Gt8M&S-;
private static String[] name={ xjUT{iwS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |#v7/$!
}; u"r`3P`
3V+] 9;
private static Sort[] impl=new Sort[]{ )` SrfGp8
new InsertSort(), g>E LGG|Q
new BubbleSort(), :[.vM
new SelectionSort(), [t m_Mg
new ShellSort(), M~Tuj1?
new QuickSort(), y1jCg%'H
new ImprovedQuickSort(), "=HA Y
new MergeSort(), K(e$esLs-
new ImprovedMergeSort(), jKz$@gP
new HeapSort() D%[mWc@1I
}; gs^Xf;gvI
CCs%%U/=
public static String toString(int algorithm){ ozyX$tp
return name[algorithm-1]; (U DnsF
} %?1ew
\i>?q
public static void sort(int[] data, int algorithm) { B-RjMxX4>
impl[algorithm-1].sort(data); W<h)HhyG
} hk;5w{t}}
f=+mIZ
public static interface Sort { ;}I:\P
public void sort(int[] data); '&P%C" 5
} ?.m bK
0Uz"^xO["
public static void swap(int[] data, int i, int j) { <q58uuK
int temp = data; :^lI`9'*R
data = data[j]; LRxZcxmy
data[j] = temp; MVpGWTH@F
} h:))@@7MJ
} 9Z$"K-G