[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; w1<pQ[A
} P2'c{],3V
int i1=l; +*.*bo
int i2=mid+1; )Kx.v'
for(int cur=l;cur<=r;cur++){ eC/{c1C
if(i1==mid+1) AQ-PHv
data[cur]=temp[i2++]; \>$zxC_
else if(i2>r) ?y|&Mz'XJ(
data[cur]=temp[i1++]; Zbo4{.#
else if(temp[i1] data[cur]=temp[i1++]; RFw0u 0Nrz
else 7(/yyZQnZ
data[cur]=temp[i2++]; g}~s"Sz
} bK "I9T #
} zlLZ8b+
3Ei^WDJ
} W[jg+|
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改进后的归并排序: Gs#9'3_U5
\J:+Wl.9A
package org.rut.util.algorithm.support; k4#j l<R
gj;gl ="3
import org.rut.util.algorithm.SortUtil; f@sC~A. 9\
j+!u=E
/** '@t,G,FJ
* @author treeroot u?>},M/
* @since 2006-2-2 05F/&+V
* @version 1.0 c:Czu
*/ W2`3 p
public class ImprovedMergeSort implements SortUtil.Sort { B1X&O d
%)i&|AV"
private static final int THRESHOLD = 10; m03dL^(
aPJTH0u
/* zd_N' :6
* (non-Javadoc) Ry[7PLn]
* #>yOp *
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A^lm0[3q
*/ 9>{ml&$
public void sort(int[] data) { @+;.W>^h
int[] temp=new int[data.length]; #~Xj=M%
mergeSort(data,temp,0,data.length-1); ]Mq-67
} ) `{jPK*`
D <~UaHfk
private void mergeSort(int[] data, int[] temp, int l, int r) { 9#[,{2pJr
int i, j, k; 2-m@-
int mid = (l + r) / 2; f['I4 /o
if (l == r) l&\y]ZV={
return; WG,Il/
if ((mid - l) >= THRESHOLD) W,8Uu1X =
mergeSort(data, temp, l, mid); a[;L+
else \=({T_j4
insertSort(data, l, mid - l + 1); uou "s9
if ((r - mid) > THRESHOLD) U]pE{^\w
mergeSort(data, temp, mid + 1, r); gwNZ`_Q
else >~d'i
insertSort(data, mid + 1, r - mid); 5[2kk5,
*~U*:>hS
for (i = l; i <= mid; i++) { y ;mk]
temp = data; [Zdrm:=]L
} 8XVRRk
for (j = 1; j <= r - mid; j++) { 6b*xhu\
temp[r - j + 1] = data[j + mid]; `C_qqf
} h[!@8
int a = temp[l]; tIn`L6b
int b = temp[r]; CeU=A9
for (i = l, j = r, k = l; k <= r; k++) { 9qa/f[G
if (a < b) { &y0GdzfQd
data[k] = temp[i++]; ^vm6JWwN0B
a = temp; "E<+idoz
} else { \e'Vsy>q
data[k] = temp[j--]; (Jb#'(~a
b = temp[j]; +Zi+ /9Z(H
} 3L2NenJB
} r5[pT(XT]
} 8(ZQM01;
!Th5x2
/** XFTqt]
* @param data XX-(>B0L
* @param l (k+*0.T&?
* @param i 1q=Q/L4P
*/ z}}P+P/
private void insertSort(int[] data, int start, int len) { "+2Cs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P,zQl;
} z\FBN=54z
} 4'3;{k$z
} ?(zCv9Pg
} AP z"k?D0
tvno3"
堆排序： v?8i;[
PcbhylKd
package org.rut.util.algorithm.support; /\Cf*cJ
jD<xpD
import org.rut.util.algorithm.SortUtil; 6 o
5{W Aw !
/** erv94acq
* @author treeroot nN.Gn+Cl
* @since 2006-2-2 l(x0d
* @version 1.0 Zs|Ga,T
*/ g/l:q&Q<
public class HeapSort implements SortUtil.Sort{ XXm7rn
";Cf@}i>
/* (non-Javadoc) Fa`%MR1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |) cJ
*/ 7L:Eg
public void sort(int[] data) { ,_$J-F?
MaxHeap h=new MaxHeap(); ]}Ys4(}
h.init(data); WnGi;AGH=1
for(int i=0;i h.remove(); ~u!V_su]GY
System.arraycopy(h.queue,1,data,0,data.length); #oiU|>3Y
} W=g'Xu!|!2
|d~'X%b%
private static class MaxHeap{ M^OYQf
^6{op3R_
void init(int[] data){ <!G\%C
this.queue=new int[data.length+1]; 6.tA$#6HP
for(int i=0;i queue[++size]=data; gT=pO`a
fixUp(size); )sQ/$gJ
} RIUJX{?
} NKEmY-f;
{d#sZT
private int size=0; I%:?f{\
G*_]Lz(N
private int[] queue; FS)# v
>jiez,
public int get() { sk07|9nU
return queue[1]; O..{wdZy
} ^AI02`c.
2::YR?
public void remove() { +qpG$#J0
SortUtil.swap(queue,1,size--); ,K@[+ R!
fixDown(1); LRWM}'.s
} [X /s^42
file://fixdown &:ZR% f
private void fixDown(int k) { 'aV'Am+:
int j; -B/'ArOo]
while ((j = k << 1) <= size) { S W6oaa81
if (j < size %26amp;%26amp; queue[j] j++; K0oF=|
if (queue[k]>queue[j]) file://不用交换 xR$T/]/
break; 8kcMgCO
SortUtil.swap(queue,j,k); %MGt3)
k = j; 2[=3-1c
} +-),E.
} Odw'Ua
private void fixUp(int k) { Wj!+ E{y<r
while (k > 1) { *pD|N
int j = k >> 1; F#L1~\7
if (queue[j]>queue[k]) %2b^t*CQ
break; )l! /7WKY
SortUtil.swap(queue,j,k); u^MRKLn
k = j; 0#=xUk#LP`
} 7f k)a
} ~a4Y8r
ex`T9j.=B
} pl[@U<8aw
F =*4]O
} S"?fa)~
|ssl0/nk
SortUtil： >r\GB#\5
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package org.rut.util.algorithm; $aU.M3
JvvN>bg
import org.rut.util.algorithm.support.BubbleSort; j[R.UB3J
import org.rut.util.algorithm.support.HeapSort; S[7^#O.)
import org.rut.util.algorithm.support.ImprovedMergeSort; v,*C>u\3s
import org.rut.util.algorithm.support.ImprovedQuickSort; g5pFr=NV
import org.rut.util.algorithm.support.InsertSort; .`_iWfK
import org.rut.util.algorithm.support.MergeSort; p/nATvh$
import org.rut.util.algorithm.support.QuickSort; o o'7
import org.rut.util.algorithm.support.SelectionSort; |/xx**?
import org.rut.util.algorithm.support.ShellSort; uh.;Jj;
U/AiI;Ne
/** \\13n4fAv
* @author treeroot DrioBb@
* @since 2006-2-2 opm_|0
* @version 1.0 jDQ?b\^
*/ -G/qfd|s/
public class SortUtil { Fx.Ly]L
public final static int INSERT = 1; t_!p({
public final static int BUBBLE = 2; ?ZGsh7<k
public final static int SELECTION = 3; U$OI]Dd9
public final static int SHELL = 4; 7FY2a
public final static int QUICK = 5; K^@9\cl^
public final static int IMPROVED_QUICK = 6; @.i#uMWF`
public final static int MERGE = 7; OE0G*`m
public final static int IMPROVED_MERGE = 8; '@@!lV
public final static int HEAP = 9; $+n6V2^K)7
`)cH(Rj
public static void sort(int[] data) { iSoQ1#MP)2
sort(data, IMPROVED_QUICK); 8kdJtEW3
} T\$i=,_$
private static String[] name={ <},JWV3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [mjie1j/<
}; #|,cy,v4
>w7KOVbN3
private static Sort[] impl=new Sort[]{ ^<-r57pz
new InsertSort(), @q>Hl`a
new BubbleSort(), M!i|,S
new SelectionSort(), \5!7zPc
new ShellSort(), NZ i3U
new QuickSort(), g<;::'6
new ImprovedQuickSort(), ,e9M%VIu6[
new MergeSort(), IaSpF<&Y;
new ImprovedMergeSort(), N%Ta.`r
new HeapSort() %c\kLSe
}; u<cnz%@
,G}i:7
public static String toString(int algorithm){ [(3s5)O
return name[algorithm-1]; IKPGqoM
} S:}"gwFM
&*7KQd
public static void sort(int[] data, int algorithm) { 9NU0K2S
impl[algorithm-1].sort(data); Kw?3joy
} /u.ZvY3,
7XyCl&Dc:
public static interface Sort { X|Y(*$?D7
public void sort(int[] data); Ky%lu^
} 9-{=m+|b
o.fqJfpj
public static void swap(int[] data, int i, int j) { m Rw0R{
int temp = data; ~I+MuI[
data = data[j]; s^eiymP
data[j] = temp; 7CuZ7!>$
} ZGR5"el!
} f4Y)GO<R]