[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; xFvDKW)_X7
} {W*_^>;K
int i1=l; J-yj&2
int i2=mid+1; 8:E)GhX
for(int cur=l;cur<=r;cur++){ \}[{q
if(i1==mid+1) `&]<_Jc1
data[cur]=temp[i2++]; 4 qMO@E_
else if(i2>r) '_!j9A]g
data[cur]=temp[i1++]; Q[+&n*
else if(temp[i1] data[cur]=temp[i1++]; <J" 7ufHSQ
else XG2&_u&
data[cur]=temp[i2++]; frV*+
} ^|-*amh
} ocOzQ13@Y
4Rj;lAlwB
} WxwSb`U|
/3`#ldb%}
改进后的归并排序: mkH{%7n
"|<6bA
package org.rut.util.algorithm.support; t:y} 7un
)*<=:
import org.rut.util.algorithm.SortUtil; {!h|(xqN+
(s`oJLW>
/** ;{'{*g[
* @author treeroot a![x^@nF
* @since 2006-2-2 U^+xCX<
* @version 1.0 {KkP"j'7h
*/ hwgLJY?
public class ImprovedMergeSort implements SortUtil.Sort { ?z,^QjQ}
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private static final int THRESHOLD = 10; wXdtY
44;ZX$HL
/* "]*16t%Z%x
* (non-Javadoc) LS1r}cl
* Fl)p^uUtl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M->/vi
*/ bMWL^*I
public void sort(int[] data) { P=v 0|Y*q|
int[] temp=new int[data.length]; *6uZ"4rb.
mergeSort(data,temp,0,data.length-1); }py6H[
} R1.No_`PHq
N$u;Q(^
private void mergeSort(int[] data, int[] temp, int l, int r) { d:KUJ Y.
int i, j, k; !=%E&e]
int mid = (l + r) / 2; GMc{g
if (l == r) )nJo\HFXv
return; c6zghP3dR
if ((mid - l) >= THRESHOLD) *5KV DOd
mergeSort(data, temp, l, mid); 88c-K{}3
else mDJF5I
insertSort(data, l, mid - l + 1); )C>4?)
if ((r - mid) > THRESHOLD) }~gBnq_DDU
mergeSort(data, temp, mid + 1, r); jET$wKw%
else `LD#fg*
insertSort(data, mid + 1, r - mid); m(Hb! RT
_"BYnPq@wb
for (i = l; i <= mid; i++) { :=J~t@
temp = data; h4@v.GI
} cW+6Emh
for (j = 1; j <= r - mid; j++) { ,SEC~)L
temp[r - j + 1] = data[j + mid]; (dSf>p r2
} &{#4^.Q
int a = temp[l]; |Ld/{&Qr
int b = temp[r]; OGmOk>_
for (i = l, j = r, k = l; k <= r; k++) { _Ju@<V$
if (a < b) { F_8< tA6
data[k] = temp[i++]; w h4WII
a = temp; -w8c;5X
} else { *eE&ptx1
data[k] = temp[j--]; x9fNIuAQ
b = temp[j]; t- Rp_2t
} 8<z]rLQw?%
} S<RJ46
} Z#8O)GK
Rg/*)SKj
/** QBi&Q%piy
* @param data T<!&6,N A
* @param l &[]0yNG
* @param i 7"L`|O?8)
*/ x --buO
private void insertSort(int[] data, int start, int len) { -8-BVU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3Q-i%7l
} l=jfgsjc
} L,I5/K6
} SoS GQ&k
} yHvF"4]
SG6@Rn*^
堆排序： nxzdg5A(w
ZzDE
package org.rut.util.algorithm.support; .A;D-"!
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import org.rut.util.algorithm.SortUtil; &w{""'
D;@*
/** 76i)m!
* @author treeroot {Vz.| a[T
* @since 2006-2-2 kNX"Vo]1
* @version 1.0 A aLj.HR
*/ mp2J|!Lx
public class HeapSort implements SortUtil.Sort{ ~T<yp
d ]LF5*i
/* (non-Javadoc) @^Tof5?F?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x Bn+-V
*/ ,X Zo0!
public void sort(int[] data) { ]lj,GD)c
MaxHeap h=new MaxHeap(); x,W)qv
h.init(data); 3JuWG\r)l
for(int i=0;i h.remove(); yRQR@
System.arraycopy(h.queue,1,data,0,data.length); &V;^xMO!
} P.bBu
(;1FhIi&
private static class MaxHeap{ #BQ7rF7CNE
R/)cEvB-0
void init(int[] data){ t#s?:
this.queue=new int[data.length+1]; LM:|Kydp3
for(int i=0;i queue[++size]=data; 2mVcT3
fixUp(size); 3`@alhD'
} r3X|*/
} G5y>v^&H
SJY<#_b
private int size=0; [n/'JeG5
l?CUd7P(a
private int[] queue; 8y;W+I(71
%GUu{n<6
public int get() { j{,3!
return queue[1]; ZM oV!lu
} @=o1q=5@8
wT?.Mte
public void remove() { uWw4l"RK`
SortUtil.swap(queue,1,size--); eto3dJ!R
fixDown(1); y(&JE^GfX
} XCU.tWR:
file://fixdown HA%%WSuf
private void fixDown(int k) { b#h?O}
int j; tjZ.p.IlG
while ((j = k << 1) <= size) { mQt';|X@
if (j < size %26amp;%26amp; queue[j] j++; +pU\;x
if (queue[k]>queue[j]) file://不用交换 2XJn3wPi
break; '| Enc"U
SortUtil.swap(queue,j,k); ND[u$N+5x"
k = j; '0g1v7Gx
} qJQE|VM&
} "@!z+x[8
private void fixUp(int k) { ZN!OM)@:!
while (k > 1) { mIVnc`3s
int j = k >> 1; bX#IE[Yp}
if (queue[j]>queue[k]) "&/:"~r
break; t ?8 ?Ok
SortUtil.swap(queue,j,k); /sY(/ JE
k = j; gd'#K~?
} QC.WR'.
} xq_%|p}y
%&KJtKe
} ia15r\4j)
c;_GZ}8
} .+3= H@8h
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SortUtil： Z;shFMu
&fA`Od6l"
package org.rut.util.algorithm; v{Cts3?Br
<apsG7(7
import org.rut.util.algorithm.support.BubbleSort; ]T\K-;i
import org.rut.util.algorithm.support.HeapSort; >B$ZKE
import org.rut.util.algorithm.support.ImprovedMergeSort; Saa#Mj`M
import org.rut.util.algorithm.support.ImprovedQuickSort; ]bO{001y,
import org.rut.util.algorithm.support.InsertSort; 0gPz|v>z
import org.rut.util.algorithm.support.MergeSort; jI@0jxF
import org.rut.util.algorithm.support.QuickSort; nt\6o?W
import org.rut.util.algorithm.support.SelectionSort; FRI<A8
import org.rut.util.algorithm.support.ShellSort; *leQd^47
wVk2Fr(
/** "!<Kmh5
* @author treeroot ";B.^pBv@;
* @since 2006-2-2 NL&(/72V
* @version 1.0 3F2> &p|7
*/ |33pf7o
public class SortUtil { tr"iluwGc
public final static int INSERT = 1; %?+A.0]E
public final static int BUBBLE = 2; B&A4-w v
public final static int SELECTION = 3; |RwpIe8~
public final static int SHELL = 4; 5sC{5LJzC
public final static int QUICK = 5; +]H9:ARI
public final static int IMPROVED_QUICK = 6; !o~% F5|t
public final static int MERGE = 7; |Hg)!5EJ
public final static int IMPROVED_MERGE = 8; r/=v;4.W
public final static int HEAP = 9; &'V_80vA
i+T#z
public static void sort(int[] data) { ~PaD _W#xP
sort(data, IMPROVED_QUICK); a`(6hL3IT
} I9N?zmH
private static String[] name={ UK+;/Mtg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]]@jvU_?kS
}; cv;&ff2%?
h>= e<H?f
private static Sort[] impl=new Sort[]{ 4XK*sR0-`
new InsertSort(), CJg &
new BubbleSort(), O_0|Q@
new SelectionSort(), dgpo4'c}
new ShellSort(), E+V^5Z:u
new QuickSort(), /,$;xt-J35
new ImprovedQuickSort(), m8$6FN
new MergeSort(), >x@]wsj
new ImprovedMergeSort(), _z\oDd`'
new HeapSort() 1i#uKKwE
}; hXM8`iFW5
cyA|6Ltg%
public static String toString(int algorithm){ JV(eHuw
return name[algorithm-1]; 4>>{}c!nf
} &#v^y3r
PXm{GLXRS;
public static void sort(int[] data, int algorithm) { ]B=B@UO@.
impl[algorithm-1].sort(data); 67%eAS
} lxj_(Uo
1qbd6D|t
public static interface Sort { ,)'!E^n
public void sort(int[] data); LgRx\*[C*
} '?t]iRCeI7
mfFC@~|g
public static void swap(int[] data, int i, int j) { p.TR1BHw
int temp = data; [Ua4{3#
data = data[j]; " jn@S-
data[j] = temp; vmJ1-<G4*
} SPOg'
} ^tsIgK^9H