[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; @?,iy?BSG
} `8$gaA*
int i1=l; Z~O1$,Z
int i2=mid+1; afEhC0j
for(int cur=l;cur<=r;cur++){ i^LLKx7M&
if(i1==mid+1) u Ey>7I
data[cur]=temp[i2++]; }r`m(z$z
else if(i2>r) Ar@" K!TS
data[cur]=temp[i1++]; k!Y7Rc{"
else if(temp[i1] data[cur]=temp[i1++]; /$v0Rq9
else #P8R
data[cur]=temp[i2++]; /DPD,bA
} v6B}ov[Y2
} U2 0@B`<
-z"=d<@
} 6J3:[7k=&
*T(z4RVg
改进后的归并排序: g~EJja;
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package org.rut.util.algorithm.support; WZkAlg7Z
lFMQT ;
import org.rut.util.algorithm.SortUtil; @SA:64 9
"/v{B?~%!
/** ~4HS 2\
* @author treeroot |y+<|fb,a
* @since 2006-2-2 'urn5[i
* @version 1.0 Jr/|nhGl5
*/ 4N&4TUIM
public class ImprovedMergeSort implements SortUtil.Sort { {ir8n731p
'xO5Le(=M
private static final int THRESHOLD = 10; z:C VzK,
u_+64c_7
/* FM\yf]'
* (non-Javadoc) Qs(WyP#
* Un{hI`3]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5.st!Lp1
*/ (<RZZ{m
public void sort(int[] data) { {<XPE:1>Y
int[] temp=new int[data.length]; =b+W*vUAw
mergeSort(data,temp,0,data.length-1); HFV4S]U=
} ~@8r-[
b65V*Vbj
private void mergeSort(int[] data, int[] temp, int l, int r) { D@5Ud)_
int i, j, k; ,dhSc<:LT
int mid = (l + r) / 2; i}C9
if (l == r) hq}kAv4B=
return; >0yx!Iao
if ((mid - l) >= THRESHOLD) YcJZG|[
mergeSort(data, temp, l, mid); |TCHPKN
else 6|q\ M
insertSort(data, l, mid - l + 1); \nQV{J
if ((r - mid) > THRESHOLD) l(;~9u0sa
mergeSort(data, temp, mid + 1, r); q'u^v PO
else o&tETJ5Bhe
insertSort(data, mid + 1, r - mid); N 2|?I(\B
*`]LbS
for (i = l; i <= mid; i++) { EjZ_|Q
temp = data; >l|ao&z>bm
} :xdl I`S
for (j = 1; j <= r - mid; j++) { [kfLT::mT
temp[r - j + 1] = data[j + mid]; Eg&oAY.U
} #:E}Eby/6I
int a = temp[l]; <=fYz^|XT
int b = temp[r]; w9QY2v,U
for (i = l, j = r, k = l; k <= r; k++) { nW1Obu8x|
if (a < b) { rkw^RW^
data[k] = temp[i++]; [T8BQn!
a = temp; [ 0?*J<d
} else { <=m@Sg{o
data[k] = temp[j--]; ySyA!Z
b = temp[j]; Oj6PmUK4
} G[34:J
} ~N{ 7
} Ko6>h
{.vU;
/** 3@'3U?Hin
* @param data }u"iA^'Ot
* @param l <[7 bUB
* @param i (of=hzT^?
*/ rGPFPsMQ]
private void insertSort(int[] data, int start, int len) { C'4gve 7!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bUR;d78
} O3Jp:.ps
} yXg #<H6V
} DI/yHs
} 5i 56J1EC
QFn .<@
堆排序： ][Ne;F6
lFHj]%Y
package org.rut.util.algorithm.support; {rp5qgVE<
:el]IH
import org.rut.util.algorithm.SortUtil; LEnm6
5v&mK 5zZ
/** lPA:aHcj
* @author treeroot .2y2Qm
* @since 2006-2-2 & ,KxE(C
* @version 1.0 njO5 YYOu
*/ nJEm&"AI
public class HeapSort implements SortUtil.Sort{ Yo`#G-]
lLq9)+HGN
/* (non-Javadoc) 7m{YWR0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KHK|Zu#k'
*/ \EP<r
public void sort(int[] data) { #=>t6B4af
MaxHeap h=new MaxHeap(); XYeuYLut
h.init(data); PjL"7^Q&
for(int i=0;i h.remove(); @qC](5|TQ
System.arraycopy(h.queue,1,data,0,data.length); } v#Tm
} La$*)qD,
:C%cnU;N
private static class MaxHeap{ 8KQD w:
&<Gs@UX~w
void init(int[] data){ %<4ZU!2L
this.queue=new int[data.length+1]; eVDO]5?
for(int i=0;i queue[++size]=data; "qb1jv#to
fixUp(size); 1y/_D$~ZO
} 3`V#ImV>
} [QC|Kd^#
%XIPPEHU
private int size=0; ;QVX'?
i,77F!
private int[] queue; irg%n
e;IzK]kP
public int get() { XMt5o&U1
return queue[1]; 3+[R !
} W<W5ih,#
F=/@D)hND
public void remove() { ;>#YOxPl
SortUtil.swap(queue,1,size--); s>i`=[qFc
fixDown(1); mW_B|dM"
} c:%ll&Xtn
file://fixdown -F&4<\=+
private void fixDown(int k) { 1 uKWvp0\
int j; o;d><
while ((j = k << 1) <= size) { #!a}ZhIt
if (j < size %26amp;%26amp; queue[j] j++; fu}ZOPu
if (queue[k]>queue[j]) file://不用交换 ^ Tr )gik
break; 6jdNQC$#B
SortUtil.swap(queue,j,k); =Zg%& J
k = j; qB%?t.k7
} 1:L _qL
} t%xD epFQ
private void fixUp(int k) { h5vvizruy
while (k > 1) { 'a}<|Et.
int j = k >> 1; v5aHe_?lp
if (queue[j]>queue[k]) x*p>l !
break; x)+3SdH
SortUtil.swap(queue,j,k); Sqt'}
k = j; 85QVj] nr
} ?3X(`:KB
} JjD'2"z
y@\R$`0J
} 8&gr}r- 5
#n9:8BKf
} .BaU}-5
)Ha`>
SortUtil： "4 Lt:o4x
Qxw?D4/Y
package org.rut.util.algorithm; 5)IJ|"]y
D^R=
import org.rut.util.algorithm.support.BubbleSort; G-54D_ 4
import org.rut.util.algorithm.support.HeapSort; f{m,?[1C,
import org.rut.util.algorithm.support.ImprovedMergeSort; Kbdjd p
import org.rut.util.algorithm.support.ImprovedQuickSort; ?9F_E+!
import org.rut.util.algorithm.support.InsertSort; 9KqN .
import org.rut.util.algorithm.support.MergeSort; C(RZ09,.S
import org.rut.util.algorithm.support.QuickSort; '+@q
import org.rut.util.algorithm.support.SelectionSort; gj\'1(Ju
import org.rut.util.algorithm.support.ShellSort; n0/H2>I[
=th(Hdk17
/** -AJ$-y
* @author treeroot 0`{3|g
* @since 2006-2-2 Rh=,]Y
* @version 1.0 aGl*h"&
*/ I UMt^z
public class SortUtil { ^rHG#^hA
public final static int INSERT = 1; `|{6U"n
public final static int BUBBLE = 2; {giKC)!
public final static int SELECTION = 3; (wMiXi
public final static int SHELL = 4; CG`s@5y>5
public final static int QUICK = 5; __F?iRrCM
public final static int IMPROVED_QUICK = 6; eU[f6OGqC
public final static int MERGE = 7; f{} zqCK
public final static int IMPROVED_MERGE = 8; 7W{xK'|]
public final static int HEAP = 9; 3 &aBU[
/b$0).fj@,
public static void sort(int[] data) { V*$(Tt(
sort(data, IMPROVED_QUICK); v#HaZT]u
} ,-4SVj8$P
private static String[] name={ ?PMF]ah
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CY"iP,nHl
}; dn"&j1@KY
5BztOYn,
private static Sort[] impl=new Sort[]{ 0n'~wz"wB
new InsertSort(), F"#8`Ps>
new BubbleSort(), efK3{
new SelectionSort(), C(ay7
new ShellSort(), Lq-Di|6q
new QuickSort(), a\UhOPFF
new ImprovedQuickSort(), -zzM!1@F
new MergeSort(), GzC=xXON
new ImprovedMergeSort(), R(i2TAaaU
new HeapSort() )ZyEn%
}; I3{koI
w2 L'j9
public static String toString(int algorithm){ ftL>oOz[
return name[algorithm-1]; *KDT0;/s
} "agc*o~!F
[f_4%Now
public static void sort(int[] data, int algorithm) { rh8.kW-K_
impl[algorithm-1].sort(data); Bi!j re
} jK!Y-
#P)7b,3pe
public static interface Sort { gwf*M3(
public void sort(int[] data); 1X5*V!u
} l> Mth+,b
(Wj2%*NT
public static void swap(int[] data, int i, int j) { kLr6j-X
int temp = data; Q%seV<!/
data = data[j]; &_DRrp0CN
data[j] = temp; ?r`UBR+[
} {3jV ,S
} 4f}:)M$5