[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; "bi !=
} fxOE]d8v
int i1=l; m"q/,}DR
int i2=mid+1; uh1S 7!^
for(int cur=l;cur<=r;cur++){ /xF 9:r
if(i1==mid+1) wU.'_SBfB
data[cur]=temp[i2++]; M!-q}5';
else if(i2>r) :`;(p{
data[cur]=temp[i1++]; ^}tLnF
else if(temp[i1] data[cur]=temp[i1++]; h9U+%=^O
else v/ eB,p
data[cur]=temp[i2++]; (A2U~j?Ry}
} .dt#2a_5q
} hO%Y{Gg
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} 2S'AIuIew
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改进后的归并排序: Z%KL[R}^w;
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package org.rut.util.algorithm.support; >2nF"?"=
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import org.rut.util.algorithm.SortUtil; iY}QgB< M
9A(n_Rs7?
/** x Ridc^
* @author treeroot R !jhwY$
* @since 2006-2-2 >J9IRAm}sc
* @version 1.0 B*32D8t`u
*/ j1W bD7*8
public class ImprovedMergeSort implements SortUtil.Sort { Vn@A]Jx^
*h>OW
private static final int THRESHOLD = 10; 4$..r4@
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/* ]~$c~*0g
* (non-Javadoc) gQu\[e%mVo
* <.;@ksCPW{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i?lX,9%
*/ M4R%Gr,La
public void sort(int[] data) { ;|Y2r^c
int[] temp=new int[data.length]; yjeqv-7
mergeSort(data,temp,0,data.length-1); jn0t-":
} Pw0{.W~r
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private void mergeSort(int[] data, int[] temp, int l, int r) { s$K@X `
int i, j, k; ]!n*V/g
int mid = (l + r) / 2; Ej-=y2j{g
if (l == r) @hE7r-}]
return; KteZK.+#:
if ((mid - l) >= THRESHOLD) BnY\FQ)K
mergeSort(data, temp, l, mid); T3=-UYx]
else #p11D= @[
insertSort(data, l, mid - l + 1); 9{auleu R
if ((r - mid) > THRESHOLD) 8Sd?b5|G~
mergeSort(data, temp, mid + 1, r); X; e`y:9
else mBYS"[S(
insertSort(data, mid + 1, r - mid); qg) Af
}Bv30V2-(
for (i = l; i <= mid; i++) { )Mm;9UA
temp = data; jM|YW*zNZ
} 7J#g1
for (j = 1; j <= r - mid; j++) { @vVRF Z
temp[r - j + 1] = data[j + mid]; H24ate?t,
} RPa?Nv?e
int a = temp[l]; %fexuy4
int b = temp[r]; xCmI7$uQ#
for (i = l, j = r, k = l; k <= r; k++) { Z<$E.##
if (a < b) { M ,.0[+
data[k] = temp[i++]; .:#_5K
a = temp; mjkw&2
} else { >*<6 zQf
data[k] = temp[j--]; hIE%-gZ/
b = temp[j]; LZZ:P
} (50[,:#
} 0|K/=dh5+
} rU2YMghE
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/** ,YAPCj
* @param data E)rOlh7
* @param l Nv*E .|G
* @param i ?-RoqF
*/ Mo?t[]L
private void insertSort(int[] data, int start, int len) { 6x (L&>F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xqi*N13
} E<98ahZ?l
} O[5_9W 4
} 1b %T_a
} Jfixm=.6
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堆排序： GWA!Ab'<U
jmk*z(}#:
package org.rut.util.algorithm.support; >TY5ZRB
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import org.rut.util.algorithm.SortUtil; XYxm8ee"j
wn A%Nh7
/** '%]@a7w
* @author treeroot foP>w4pB
* @since 2006-2-2 7S~9E2N
* @version 1.0 j~,LoGuPh
*/ Jv4D^>yj[
public class HeapSort implements SortUtil.Sort{ gw&#X~em
A 4W
/* (non-Javadoc) HC;I0&v>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /qz "I-a
*/ k,*#I<($
public void sort(int[] data) { [K4+G]6
MaxHeap h=new MaxHeap(); wMPw/a;
h.init(data); ?3"D| cS1
for(int i=0;i h.remove(); _{Q?VQvZ
System.arraycopy(h.queue,1,data,0,data.length); pJ*#aH[ySP
} $ DZQdhv
rM >V=|9,
private static class MaxHeap{ w#G=Z_Tt
cLyuCaH>c
void init(int[] data){ T m@1q!G
this.queue=new int[data.length+1]; c]>&6-;rf
for(int i=0;i queue[++size]=data; iP?ASqo{
fixUp(size); moJT8tb
} 3!oQmG_T
} ,M/#Q6P0}
dj'8x48H2W
private int size=0; wq_oh*"
9M7(_E;)B
private int[] queue; #!d^3iB2
< 8 Y<w|Hh
public int get() { @<TfA>*VJ
return queue[1]; Y7t{4P
} ME10dr
ks#Z~6+3
public void remove() { !|:q@|- %@
SortUtil.swap(queue,1,size--); SX=0f^
fixDown(1); \Af|$9boHz
} xE-c9AH
file://fixdown =E~5&W7
private void fixDown(int k) { eeJt4DV8v
int j; C94UF7al
while ((j = k << 1) <= size) { F3 l^^Mc
if (j < size %26amp;%26amp; queue[j] j++; UrcN?
if (queue[k]>queue[j]) file://不用交换 )< a8a@
break; "`3^MvC
SortUtil.swap(queue,j,k); aq,)6P`
k = j; ^RyTK|SQ
} X>GY*XU
} ]|LaMMD
private void fixUp(int k) { '-]BSU
while (k > 1) { _yB9/F
int j = k >> 1; kbT-Oz 2
if (queue[j]>queue[k]) -%V-'X5
break; b G5
SortUtil.swap(queue,j,k); |Sv#f2`
k = j; U6'haPlOk%
} 7RFkHME
} lvJ{=~u
G1^!ej
} r\ Yur
<IDzv'
} <.(/#=2
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SortUtil： r4ttEJ-jG
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package org.rut.util.algorithm; !K~$-jlT
~d `4W<1a
import org.rut.util.algorithm.support.BubbleSort; / lM~K:
import org.rut.util.algorithm.support.HeapSort; |< FCt-U
import org.rut.util.algorithm.support.ImprovedMergeSort; &FF. Ddt{
import org.rut.util.algorithm.support.ImprovedQuickSort; i6:yNb ='
import org.rut.util.algorithm.support.InsertSort; Z:$b)+2:\
import org.rut.util.algorithm.support.MergeSort; T<?BIQz(}
import org.rut.util.algorithm.support.QuickSort; d@f2Vxe7
import org.rut.util.algorithm.support.SelectionSort; O:p649A
import org.rut.util.algorithm.support.ShellSort; (#iM0{
W8h\ s {
/** AR6vc
* @author treeroot *+Q*&-$
* @since 2006-2-2 .%Q Ea_\
* @version 1.0 ~WXxVm*@
*/ K.1yncS^
public class SortUtil { A;x^6>
public final static int INSERT = 1; mM{v>Em2K#
public final static int BUBBLE = 2; J\D3fh97-
public final static int SELECTION = 3; (+ anTA=
public final static int SHELL = 4; .LR>&N_U
public final static int QUICK = 5; "q/M8
public final static int IMPROVED_QUICK = 6; m9cT}x&j
public final static int MERGE = 7; #de^~
public final static int IMPROVED_MERGE = 8; x.Ml~W[
public final static int HEAP = 9; *v/*_6f*
4PM`hc
public static void sort(int[] data) { ,x.)L=Cx8
sort(data, IMPROVED_QUICK); S Tk#hhx
} }?kO<)d
private static String[] name={ bI(98V,t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z5vI0 N$
}; pPpnO
ZhaOH5{9
private static Sort[] impl=new Sort[]{ 9'h^59
new InsertSort(), w/6@R 4)p
new BubbleSort(), P<x
new SelectionSort(), V/}8+Xq
new ShellSort(), F &}V65
new QuickSort(), jpv,0(
new ImprovedQuickSort(), k"{U}Y/}
new MergeSort(), i%8 sy
new ImprovedMergeSort(), :zRboqe(cc
new HeapSort() nB0ol-<
}; .9Fm>e+!C
[Cp{i<C
public static String toString(int algorithm){ /Ql}jSKi
return name[algorithm-1]; a"aV&t
} +KNr1rG
P$I\)Q H
public static void sort(int[] data, int algorithm) { Zh^w)}(W
impl[algorithm-1].sort(data); e*H$c?7NL
} hhhO+D1(
sc60:IxgI
public static interface Sort { 9To6Rc;
public void sort(int[] data); 55p=veq \
} ^&HYnwk
'%N)(S`O7P
public static void swap(int[] data, int i, int j) { 2_X0Og8s[
int temp = data; dZmq
data = data[j]; N<99K!
data[j] = temp; >k|[U[@
} z, [+
} T`sM4 VWqU