[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; 08Gr
} ?Z"}RMM)8
int i1=l; ]T1"3 [si
int i2=mid+1; GU9`;/
for(int cur=l;cur<=r;cur++){ 2q>4nN
if(i1==mid+1) 0nX5 $Kn
data[cur]=temp[i2++]; %"tf`,d~3
else if(i2>r) :Li)]qN.I
data[cur]=temp[i1++]; 2]l*{l^ Bl
else if(temp[i1] data[cur]=temp[i1++]; ! JN@4
else XT\;2etVL
data[cur]=temp[i2++]; &yuerNK
} Oc1ZIIkh\
} BC^WPr
xxYFWvi
} 1E(pJu'K
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改进后的归并排序: 6_7d1.wv9
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package org.rut.util.algorithm.support; se-}d.PwL
6%>0g^`)9Y
import org.rut.util.algorithm.SortUtil; q\\J9`Q$J
gDH x+"?
/** K4KmoGb
* @author treeroot 9%8T09I!
* @since 2006-2-2 W cnYD)
* @version 1.0 CwAl-o
*/ }v?{npEOt+
public class ImprovedMergeSort implements SortUtil.Sort { h6#
iJcl0)|
private static final int THRESHOLD = 10; rW6LMkt72
Y\lBPp0{\v
/* =1D*K%
* (non-Javadoc) y]k`}&-~
* HO' HkVA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3WhJ,~o-y
*/ DwI)?a_+
public void sort(int[] data) { m1TPy-|1
int[] temp=new int[data.length]; qsLsyi|zG
mergeSort(data,temp,0,data.length-1); WH!<Z=#c}
} kG E|17I
,YH.n>`s+
private void mergeSort(int[] data, int[] temp, int l, int r) { {)G3*>sG3
int i, j, k; >?5`FC
int mid = (l + r) / 2; .Xr_BJ _
if (l == r) {\k9%2V*+
return; Mc.KLz&,FC
if ((mid - l) >= THRESHOLD) :geXplTx
mergeSort(data, temp, l, mid); u%2u%-w
else Y?> S.B7
insertSort(data, l, mid - l + 1); dJkTHmw
if ((r - mid) > THRESHOLD) :=* -x
mergeSort(data, temp, mid + 1, r); 4h|D[Cb]
else R,(^fM
insertSort(data, mid + 1, r - mid); zMDR1/|D
tW(E\#!|p<
for (i = l; i <= mid; i++) { Z"P{/~HG
temp = data; cq/)Yff@:
} v<O\ l~S
for (j = 1; j <= r - mid; j++) { >k:)'*
temp[r - j + 1] = data[j + mid]; wH<S0vl
} n_5g:`Y
int a = temp[l]; t.m $|M>
int b = temp[r]; ivt\| >
for (i = l, j = r, k = l; k <= r; k++) { Ih{~?(V$
if (a < b) { 2)G ZU
data[k] = temp[i++]; *rWE.4=&
a = temp; 0KEytm]
} else { B]jh$@
data[k] = temp[j--]; r+>9O
b = temp[j]; 1~j.jv$
} pt=[XhxC(>
} j,Mp["X&
} RgEUTpX
_ TUw0:&
/** y`'Ly@s
* @param data L%fWa2P'
* @param l 3b|.L Jz+
* @param i D4@=+
*/ A:N!H_x
private void insertSort(int[] data, int start, int len) { fY>\VY$>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !\p-|51
} &%^[2^H8"
} z8A`BVqI
} u{J:wb
} )m?oQ#`m
=uD2j9!"7
堆排序： E#T'=f[r~
bMgp
package org.rut.util.algorithm.support; ')_jK',1
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import org.rut.util.algorithm.SortUtil; 5^pQ=Sgt
eK]GyY/Y
/** CvlAn7r,@
* @author treeroot ofS9h*wrJ
* @since 2006-2-2 fE7Kv_N-%
* @version 1.0 vG<Mz?wr
*/ Dt8eVWkN~
public class HeapSort implements SortUtil.Sort{ Y8Mo.v
N#|c2n+
/* (non-Javadoc) /bg8oB4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2H4+D)
*/ N:=D@x~]
public void sort(int[] data) { }P^{\SDX
MaxHeap h=new MaxHeap(); H.'_NCF&;L
h.init(data); Lc+)#9*d
for(int i=0;i h.remove(); iTD{
System.arraycopy(h.queue,1,data,0,data.length); =PXNg!B}D*
} I_v]^>Xw
8 #0?
private static class MaxHeap{ _QCAV+K'
eQzTb91
void init(int[] data){ s9@IOE GAt
this.queue=new int[data.length+1]; )00#Rrt9
for(int i=0;i queue[++size]=data; (/PD;R$b
fixUp(size); 6Ba>l$/q
} @Yy=HV
} ;u,5 2
n1$p esr
private int size=0; 2_UH,n
5JQq?e)n
private int[] queue; cpf8f i
~ 5`Ngpp
public int get() { YAsvw\iseK
return queue[1]; )\p@E3Uxf
} T<P4+#JK
_)lK.5
public void remove() { ,v(G2`Z
SortUtil.swap(queue,1,size--); owQLAV
fixDown(1); 2Ask]
} vrh}X[JEw'
file://fixdown <PXA`]x~
private void fixDown(int k) { g`\Vy4w
int j; NeUpl./b
while ((j = k << 1) <= size) { %$Mvq&ZZ
if (j < size %26amp;%26amp; queue[j] j++; L[<MBgFKv
if (queue[k]>queue[j]) file://不用交换 SrU,-mA W
break; OpYq qBf_
SortUtil.swap(queue,j,k); 2uV=kqnO
k = j; *j8w" 4
} &:w{[H$-
} :'#BU:
private void fixUp(int k) { nbhx2@Teqe
while (k > 1) { n0nkv[
int j = k >> 1; 9NKZE?5P|D
if (queue[j]>queue[k]) UI |D?z<
break; /TS>I8V!
SortUtil.swap(queue,j,k); bMf+/n
k = j; R~)c(jj5
} lYU_uFOs\
} RQv`D&u_
ykM(` 1`m
} y%p&g
L2AZ0E"ub
} -x5^>+Y4
luAhyEp
SortUtil： +n1}({7m
*COr^7Kf5
package org.rut.util.algorithm; BwrMRMq"
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import org.rut.util.algorithm.support.BubbleSort; l{vi{9n)
import org.rut.util.algorithm.support.HeapSort; w~Es,@
import org.rut.util.algorithm.support.ImprovedMergeSort; XW`&1qx
import org.rut.util.algorithm.support.ImprovedQuickSort; ^i#F+Q`1
import org.rut.util.algorithm.support.InsertSort; QfRt3\^`
import org.rut.util.algorithm.support.MergeSort; mLKwk6I
import org.rut.util.algorithm.support.QuickSort; )";g*4R[
import org.rut.util.algorithm.support.SelectionSort; ?\.P
import org.rut.util.algorithm.support.ShellSort; \/lH]u\x
,!PNfJA2
/** dLG5yx\js
* @author treeroot %]RzC`NZ
* @since 2006-2-2 rQ.j$U
* @version 1.0 O zY&^:>
*/ ytr~} M%
public class SortUtil { %F1 Ce/
public final static int INSERT = 1; 7teg*M{
public final static int BUBBLE = 2; 2A {k>TjQ
public final static int SELECTION = 3; Z6 (;~"Em
public final static int SHELL = 4; cD]{ Nn
public final static int QUICK = 5; L@9"6&
public final static int IMPROVED_QUICK = 6; bZ:w_z[3=
public final static int MERGE = 7; ZN',=&;n'
public final static int IMPROVED_MERGE = 8; 5H`k$[3V
public final static int HEAP = 9; ?ZE1>L7e
8x[q[
public static void sort(int[] data) { $UgM7V$
sort(data, IMPROVED_QUICK); "P'W@
} cMIQbBM
private static String[] name={ G)iV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "VB-=. A
}; :8jHN_u
a4O!q;tu7
private static Sort[] impl=new Sort[]{ PtwE[YDu
new InsertSort(), :W8DgL>l
new BubbleSort(), 8iR%?5 >K
new SelectionSort(), w~X1Il7A
new ShellSort(), sf@g $
new QuickSort(), @y{Whun~
new ImprovedQuickSort(), !~"q$T>@
new MergeSort(), UvxJ _
new ImprovedMergeSort(), I4gyGg$H
new HeapSort() 0B>{31)
}; r68'DJ&m3
teQ%t~PJ-&
public static String toString(int algorithm){ 66Huqo
return name[algorithm-1]; R/A40i
} $yI!YX&
?:~Y%4;
public static void sort(int[] data, int algorithm) { }vPDCUZ
impl[algorithm-1].sort(data); d*7 Tjs{\
} C/tn0
XM>ByfD{
public static interface Sort { \<]nv}1O
public void sort(int[] data); hA/K>Z
} sGc4^Z%l?
n\ZDI+X
public static void swap(int[] data, int i, int j) { 0ppZ~}&
int temp = data; #p6#,PZ
data = data[j]; 5<Xq7|Jt
data[j] = temp; &iId<.SiJ
} Oy&Myjny<
} IH'DCY: