[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; EDT9O
} (/7b8)g
int i1=l; !He_f-eZ
int i2=mid+1; [*C%u_h
for(int cur=l;cur<=r;cur++){ |yl,7m/B-G
if(i1==mid+1) VBUrtx:
data[cur]=temp[i2++]; nz|6CP
else if(i2>r) |\2>n!
data[cur]=temp[i1++]; FI,K 0sO/|
else if(temp[i1] data[cur]=temp[i1++]; %oB0@&!mS
else "1$X5?%
data[cur]=temp[i2++]; !RP0W
} ,wf:Fr
} IR:GoD+
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} AJ+\Qs(0
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改进后的归并排序: Mw3$QRM
Xdi<V_!BC-
package org.rut.util.algorithm.support; 9wlp AK
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import org.rut.util.algorithm.SortUtil; eC"k-a8j+
",l6-<s
/** iX o(
* @author treeroot Llkh kq_
* @since 2006-2-2 3-btaG'P
* @version 1.0 _aYhW{wW
*/ :zX^H9'E<(
public class ImprovedMergeSort implements SortUtil.Sort { tnAj3wc
ul3~!9F5F
private static final int THRESHOLD = 10; ,4S[<(T"
vf zC2
/* =igTY1|af
* (non-Javadoc) [;yKbw!C
* #]dq^B~~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d5NE:%K
*/ DXG`%<ZMn
public void sort(int[] data) { dG7d}0Ou'
int[] temp=new int[data.length]; X1d{7H8A2
mergeSort(data,temp,0,data.length-1); wK0x\V6dJ
} Td,d9M
?%`Ph ?BZl
private void mergeSort(int[] data, int[] temp, int l, int r) { >;XtJJS
int i, j, k; :8(jhs
int mid = (l + r) / 2; Rz&`L8Bz
if (l == r) >-\^)z
return; J90:c@O"w
if ((mid - l) >= THRESHOLD) k;jl3GV
mergeSort(data, temp, l, mid); CcW3o"=4
else *=O]^|]2
insertSort(data, l, mid - l + 1); L*dGo,oN
if ((r - mid) > THRESHOLD) =xDxX#3
mergeSort(data, temp, mid + 1, r); g0"xG}d
else `*[\b9>
insertSort(data, mid + 1, r - mid); DLP@?]BBOA
z6}p4
for (i = l; i <= mid; i++) { 2*^=)5Gj-h
temp = data; |JR`" nF`
} V,rR*a&p
for (j = 1; j <= r - mid; j++) { x&^Xgi?
temp[r - j + 1] = data[j + mid]; +'SL5d*
} 8G3 Z,8P4(
int a = temp[l]; 1) K<x
int b = temp[r]; ,"5HJA4
for (i = l, j = r, k = l; k <= r; k++) { T[^&ZS]s
if (a < b) { 4CchE15
data[k] = temp[i++]; RhKDQGdd
a = temp; GApvRR+Z
} else { [TQYu:e
data[k] = temp[j--]; [T4{K&
b = temp[j]; lwfM>%%N
} 8\9W:D@"x
} kP}l"CN4
} Y'jgp Vt
|=v,^uo
/** wl%ysM|x
* @param data m' S{P:TK
* @param l % >a /m.$
* @param i y`8U0TE3R
*/ Ym"^Ds}
private void insertSort(int[] data, int start, int len) { I$S*elveG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Du +_dr^4
} Xs|d#WbX
} @`+\vmfD
} J zFR9DEt
} *~4<CP+"0
~8UMwpl-
堆排序： Ek_&E7
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package org.rut.util.algorithm.support; A$7K5
J"< h#@`
import org.rut.util.algorithm.SortUtil; cAGM|%
bf=\ED^
/** hrD2-S
* @author treeroot Xjxa 2D
* @since 2006-2-2 !]}C!dXd
* @version 1.0 j@#RfVx
*/ +w(6#R8u5
public class HeapSort implements SortUtil.Sort{ -hfkF+=U'
Cq7 uy
/* (non-Javadoc) T%9t8?I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -dF (_ %C
*/ B5+Q%)52
public void sort(int[] data) { K@DFu5
MaxHeap h=new MaxHeap(); |OAiHSW"V
h.init(data); &hI!0DixX
for(int i=0;i h.remove(); ~|, "w90
System.arraycopy(h.queue,1,data,0,data.length); 6AdUlPM
} x5xMr.vm
Pzd!"Gl9
private static class MaxHeap{ A'uaR?
/=l!F'
void init(int[] data){ l&e{GHz
this.queue=new int[data.length+1]; O(-6Zqk8Q
for(int i=0;i queue[++size]=data; ^8bc<c:P
fixUp(size); jj;TS%
} 3!cenyE
} "x.iD,>k
jTNt!2 :B
private int size=0; 6 <`e]PT
%Jd!x{a`>A
private int[] queue; Avyer/{
K$GQc"
public int get() { a%a0/!U[
return queue[1]; >dgq2ok!u
} zsd<0^ p\{
7&HcrkP]
public void remove() { v5e*R8/
SortUtil.swap(queue,1,size--); G\5Bdo1g
fixDown(1); of7p~{3H
} ? p[Rv
file://fixdown S76MY&Vx23
private void fixDown(int k) { "".a(ZGg
int j; pZ[|Q2(
while ((j = k << 1) <= size) { 8 l= EL7
if (j < size %26amp;%26amp; queue[j] j++; yn@wce
if (queue[k]>queue[j]) file://不用交换 @`nG&U
break; %dr*dA'
SortUtil.swap(queue,j,k); })kx#_o]'d
k = j; 1ljcbD)T;
} _-#o[>2[
} x $[_Hix
private void fixUp(int k) { ;.xKVH/@
while (k > 1) { {*g{9`
int j = k >> 1; F4"bMN
if (queue[j]>queue[k]) P_mP ^L
break; `-cw[@uD
SortUtil.swap(queue,j,k); x[)]u8^A
k = j; 9An\uH)mL
} U6wy^!_X9
} UUbO\_&y
t>LSP$
} ~#VDJ[Z
9vW]HOK
} [g:cG
y4 ]5z/
SortUtil： z<^LY]
pmurG
package org.rut.util.algorithm; =+?OsH v
hMvJNI6O
import org.rut.util.algorithm.support.BubbleSort; kEAF1RP:
import org.rut.util.algorithm.support.HeapSort; n"}*C|(k
import org.rut.util.algorithm.support.ImprovedMergeSort; bUM4^m
import org.rut.util.algorithm.support.ImprovedQuickSort; 5A5t
import org.rut.util.algorithm.support.InsertSort; @e\ @EW
import org.rut.util.algorithm.support.MergeSort; _\,lv \u
import org.rut.util.algorithm.support.QuickSort; P*%P"g
import org.rut.util.algorithm.support.SelectionSort; <tsexsw
import org.rut.util.algorithm.support.ShellSort; i|,}y`C#
H"Hl~~U
/** =TzJgx
* @author treeroot {(asy}a9K
* @since 2006-2-2 #j+cl'
* @version 1.0 .!lLj1?p
*/ ,!,M'<?"
public class SortUtil { =oiz@Q@H
public final static int INSERT = 1; y0?HZ Xq
public final static int BUBBLE = 2; r58<A'#
public final static int SELECTION = 3; 3m-g-
public final static int SHELL = 4; {%P2.:
public final static int QUICK = 5; 9AQ,@xP|
public final static int IMPROVED_QUICK = 6; UH+#Nel+!
public final static int MERGE = 7; x;} 25A|
public final static int IMPROVED_MERGE = 8; UQYHR+
public final static int HEAP = 9; *V+,X
xC0y2+)|
public static void sort(int[] data) { R-,L"Vv
sort(data, IMPROVED_QUICK); ei=u$S.
} <}c7E3Uc
private static String[] name={ vpdPW%B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :f_oN3F p
}; #uC}IX2n
FzCXA=m
private static Sort[] impl=new Sort[]{ P\{s C6E
new InsertSort(), ^'Rs`e
new BubbleSort(), 9jx>&MnWs
new SelectionSort(), 9&C8c\Y
new ShellSort(), z?kE((Ey
new QuickSort(), $nIE;idk
new ImprovedQuickSort(), )"{}L.gC6
new MergeSort(), }vgM$o
new ImprovedMergeSort(), s[/d}S@ >
new HeapSort() pzQc UG
}; E[zq<&P@
saQo]6#
public static String toString(int algorithm){ &t_TLV 8T
return name[algorithm-1]; =`N0
} eAjR(\f>
63$`KG3
public static void sort(int[] data, int algorithm) { lZ2gCZ
impl[algorithm-1].sort(data); 55] MRv
} u WdKG({][
cG@Wo8+
public static interface Sort { kJNg>SN*@#
public void sort(int[] data); ni )G
} tux`-F
"A~D(1K
public static void swap(int[] data, int i, int j) { 8ql<7RTM!
int temp = data; 4OO^%`=)M'
data = data[j]; {9j0k`A
data[j] = temp; x5;D'Y t"|
} Q?([#
} R*k;4*1u