[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; n.@HT"
} !Q>xVlPVu
int i1=l; {8.Zb NEJ
int i2=mid+1; 5{HF'1XgZ*
for(int cur=l;cur<=r;cur++){ 'pt(
if(i1==mid+1) nVs@DH
data[cur]=temp[i2++]; Gsh9D
else if(i2>r) lc <V_8
data[cur]=temp[i1++]; ]fajj\
else if(temp[i1] data[cur]=temp[i1++]; $z_yx `5
else y7+@ v'
data[cur]=temp[i2++]; j/aJDE(+
} d}O\:\}y
} S})f`X9_}
[3X\"x5@V
} OkC.e')Vx
J?V$V >d
改进后的归并排序: IT NFmD
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package org.rut.util.algorithm.support; 'ayb`
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import org.rut.util.algorithm.SortUtil; vN(~}gOd\
e[iv"|+
/** Lyc6nP;F
* @author treeroot a &tWMxBr
* @since 2006-2-2 _o9axBJs
* @version 1.0 hj1;f<' U
*/ e\X[\ve
public class ImprovedMergeSort implements SortUtil.Sort { pJFn 8&!J
uzxwJs'fz
private static final int THRESHOLD = 10; ,Mw93Kp Va
K{d3)lVYCS
/* 3u j|jwL
* (non-Javadoc) m%.4OXX"&
* F9LKO3Rh#u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X QLP|v;"
*/ z9 0JZA
public void sort(int[] data) { c!HGiqp
int[] temp=new int[data.length]; fK:4jl-r
mergeSort(data,temp,0,data.length-1); 9X*Z\-
} ]0'cdC
jUE:QOfRib
private void mergeSort(int[] data, int[] temp, int l, int r) { F$ZWQ9&5U0
int i, j, k; _-o*3gmbQ
int mid = (l + r) / 2; f`:e#x
if (l == r) P>)-uLc~W
return; YRG+I GX
if ((mid - l) >= THRESHOLD) Av.(i2
mergeSort(data, temp, l, mid); kZU8s'C
else n{r+t=X
insertSort(data, l, mid - l + 1); FT[oM<M\Xd
if ((r - mid) > THRESHOLD) s|pb0
mergeSort(data, temp, mid + 1, r); H'q&1^w)
else d#ya"e>
insertSort(data, mid + 1, r - mid); 6zRJ5uI,/
~9kvC&/{[
for (i = l; i <= mid; i++) { cQ6[o"j.
temp = data; )_GM&-
} 9`4h"9dO
for (j = 1; j <= r - mid; j++) { >:W)9o
temp[r - j + 1] = data[j + mid]; i_`YZ7Hxp
} smIZ:L%
int a = temp[l]; 7KRc^ *pZs
int b = temp[r]; %f6l"~y
for (i = l, j = r, k = l; k <= r; k++) { yZ0;\Tr*J
if (a < b) { pqMvYF
data[k] = temp[i++]; [O"i!AQ
a = temp; +GP"9S2%R
} else { X2M<DeF:
data[k] = temp[j--]; 9'8OGCN
b = temp[j]; px//q4U
} rJ\A)O+Mq(
} 4 3]6J]!)
} &U4]hawbOU
?=r!b{9
/** QAygr4\X^
* @param data U|{WtuR
* @param l 7w>"M
* @param i 3C_g)5 _:
*/ VZAdc*X
private void insertSort(int[] data, int start, int len) { ]3d&S5zU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P2`ks[u+i
} jvu,W4
} F<V zVEx
} wf|CE410
} 2i,Jnv=sR
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堆排序： Q96g7[
jWU)y)$
package org.rut.util.algorithm.support; @kqy!5)K
brTB /(E
import org.rut.util.algorithm.SortUtil; VJ=!0v
)3G?5 OTS
/** IL>g-
* @author treeroot rtzxMCSEU
* @since 2006-2-2 b%)a5H(
* @version 1.0 ^8MgNVoJ)
*/ QkF-}P%
public class HeapSort implements SortUtil.Sort{ Q2fa]*Z5
bjvi`jyL3k
/* (non-Javadoc) [xE\IqwM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]\_4r)cN<n
*/ w\@Anwj#L
public void sort(int[] data) { L1D%vu`
MaxHeap h=new MaxHeap(); p1|@F^Q
h.init(data); |20p#]0E+
for(int i=0;i h.remove(); S8]g'!
System.arraycopy(h.queue,1,data,0,data.length); F`38sq
} 5k\61(*s
I`y}Ky<q
private static class MaxHeap{ _C*}14 "3
.79'c%3}
void init(int[] data){ 3ea6g5kX
this.queue=new int[data.length+1]; Pd@?(WQ
for(int i=0;i queue[++size]=data; $Z;0/\r%
fixUp(size); 9xWeVlfQ
} a]ftE\99
} s\KV\5\o
\y0abxIHS
private int size=0; F-ijGGL#
3-Ti'xM
private int[] queue; i4uUvZf
RQh4RUm
public int get() { _y8)jD"
return queue[1]; \ (X~Z
} dwmj*+
D vK}UAj=
public void remove() { fo5!d@Nv
SortUtil.swap(queue,1,size--); 1YS{; y[o
fixDown(1); D&]SPhX
} gN(8T_r
file://fixdown W/&cnp\
private void fixDown(int k) { D+k5e=
int j; 3 D+dM0wM
while ((j = k << 1) <= size) { WAob"`8]
if (j < size %26amp;%26amp; queue[j] j++; %+`$Lb?{
if (queue[k]>queue[j]) file://不用交换 3UBG?%!$f
break; cl{;%4$9
SortUtil.swap(queue,j,k); R[Pyrs!H
k = j; VV?KJz=,W=
} :PjHsNp;^
} a[t2TjB
private void fixUp(int k) { !v94FkS>
while (k > 1) { $%sOL( r
int j = k >> 1; 0h$23.
if (queue[j]>queue[k]) $7lI Dt
break; bl:.D~@
SortUtil.swap(queue,j,k); =cg0o_q8
k = j; H{9di\xnEm
} ?mrG^TV^+r
} !7Ta Vx}`(
4WDh8U
} #=+d;RdlW
*y F 9_\n
} CYs:P8^
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SortUtil： i!jxjP
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package org.rut.util.algorithm; Svy bP&i|
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import org.rut.util.algorithm.support.BubbleSort; Ll%[}C?~]?
import org.rut.util.algorithm.support.HeapSort; yp_:]RE
import org.rut.util.algorithm.support.ImprovedMergeSort; ;#cb%e3
import org.rut.util.algorithm.support.ImprovedQuickSort; \h?C G_|]
import org.rut.util.algorithm.support.InsertSort; kC0F@'D
import org.rut.util.algorithm.support.MergeSort; iIA&\'|;i
import org.rut.util.algorithm.support.QuickSort; j:\MrYt0H
import org.rut.util.algorithm.support.SelectionSort; XeKIue@_
import org.rut.util.algorithm.support.ShellSort; pjWqI6,
F3i+t+Jt
/** BUuNI_?M#5
* @author treeroot K1]H~'
* @since 2006-2-2 PW~+=,
* @version 1.0 m "h{HgJd
*/ +r"{$'{^
public class SortUtil { 2D>WIOX
public final static int INSERT = 1; >7p?^*&7;
public final static int BUBBLE = 2; AK} wSXF
public final static int SELECTION = 3; "VRcR
public final static int SHELL = 4; 4(f[Z9 iZ]
public final static int QUICK = 5; w =^QIr%
public final static int IMPROVED_QUICK = 6; &2d^=fih
public final static int MERGE = 7; -uHD| }
public final static int IMPROVED_MERGE = 8; -O:+?gG
public final static int HEAP = 9; Xk8+m>
O=?WI
public static void sort(int[] data) { L#1YR}m
sort(data, IMPROVED_QUICK); 4siNY4i"
} D .oX>L#:
private static String[] name={ yF8 av=<{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" waz)jEk
}; ]v{f!r=}
,`ST Va-
private static Sort[] impl=new Sort[]{ 0GK<l
new InsertSort(), iC10|0%{
new BubbleSort(), ;Kob]b
new SelectionSort(), S!j=hj@qW
new ShellSort(), ,]+P#eXgE
new QuickSort(), $vlq]6V8
new ImprovedQuickSort(), p%pM3<p
new MergeSort(), c=p`5sN)
new ImprovedMergeSort(), o{f|==<t3#
new HeapSort() ze@NqCF
}; iZ} w>1
UE3(L ^
public static String toString(int algorithm){ ?5_~Kn%2
return name[algorithm-1]; (LbAP9Zj#f
} e[.c^Hw
r9McCebIW
public static void sort(int[] data, int algorithm) { e33j&:O
impl[algorithm-1].sort(data); SR7$m<0t*
} MB06=N
(99P9\[p
public static interface Sort { /n;Ll](ri
public void sort(int[] data); /`McKYIP
} FKRO0%M4}Z
q1}HsTnBH
public static void swap(int[] data, int i, int j) { 78zjC6}`
int temp = data; e=ZwhRP
data = data[j]; #-*7<wN
data[j] = temp; D;VQoO
} 2[6>h)
} Y7(E<1Yx