[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; NsJ(`zk:
} k:#P|z$UD
int i1=l; DNj"SF(J
int i2=mid+1; +{L<? "
for(int cur=l;cur<=r;cur++){ EoxQ */
if(i1==mid+1) 6'RrQc=q
data[cur]=temp[i2++]; ,$ ^C4I
else if(i2>r) r?*NhLG;
data[cur]=temp[i1++]; `A,g] 1C:
else if(temp[i1] data[cur]=temp[i1++]; w&B#goS
else dGFGr}&s
data[cur]=temp[i2++]; !Wy[).ZAf
} _!?Hu/zo
} ~DsECnD
sPb=82~z
} ;XDz)`c
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改进后的归并排序: {!K-E9_,S
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package org.rut.util.algorithm.support; m~D&gGFt
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import org.rut.util.algorithm.SortUtil; aKd+CO:
YNBHBK4;
/** EgDQ+( -
* @author treeroot WwUv5GZTW
* @since 2006-2-2 ^_%kE%I
* @version 1.0 `)Z!V?&!
*/ RJON90,J
public class ImprovedMergeSort implements SortUtil.Sort { bug Ot7
a+9*@z2
private static final int THRESHOLD = 10; ;9}pOzF1q
C^z\([k0er
/* &V<W>Y>|l*
* (non-Javadoc) >"@?ir
* \^V`ds*.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d|*"IFe
*/ j}AFE
public void sort(int[] data) { 3w!c`;c%
int[] temp=new int[data.length]; f(eQ+0D
mergeSort(data,temp,0,data.length-1); ,= &B28Qe)
} n 8pt\i0
SgEBh
private void mergeSort(int[] data, int[] temp, int l, int r) { -.|4Y#b:&
int i, j, k; DS-fjH\
int mid = (l + r) / 2; }rdIUlVO\
if (l == r) )C.yF)Ql
return; tdF9NFMD
if ((mid - l) >= THRESHOLD) 6ITLGA
mergeSort(data, temp, l, mid); EOoZoVdzx
else /S\cU`ZVe
insertSort(data, l, mid - l + 1); Y= 7%+WyD
if ((r - mid) > THRESHOLD) lI/0:|l
mergeSort(data, temp, mid + 1, r); bhs(Qzx
else O3.C:?;x
insertSort(data, mid + 1, r - mid); sIl33kmv
-[Qvg49jy
for (i = l; i <= mid; i++) { V >,Z-&.%
temp = data; ;_:Ool,
} !4rPv\
for (j = 1; j <= r - mid; j++) { ./p|?pu
temp[r - j + 1] = data[j + mid]; M]-VHI[&W
} XTDE53Js&
int a = temp[l]; hGf-q?7
int b = temp[r]; ^<0IB#dA
for (i = l, j = r, k = l; k <= r; k++) { z\/53Sy<
if (a < b) { <fdPLw;@e4
data[k] = temp[i++]; 7rHS^8'H&
a = temp; ofW+_DKB?l
} else { kHJ96G
data[k] = temp[j--]; @S 6u9v
b = temp[j]; m/`IGT5J
} LihjGkj\g
} t?^9HP1b_
} A7P`lJgv
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/** @1R8-aa-r
* @param data jLcHY-P0V
* @param l RH~3M0'0
* @param i \Z/k;=Sla
*/ =ex'22
private void insertSort(int[] data, int start, int len) { l>v{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 50a\e
} #\bP7a+
} +ySY>`1k~
} |)W!jC&k
} Y~n`~(
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堆排序： @<_`2eW'/R
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package org.rut.util.algorithm.support; ~DLIzg7p!
|)@N-f:E
import org.rut.util.algorithm.SortUtil; 4x'AC%&Qi
|ZU#IQVQfn
/** #/j={*-
* @author treeroot MY-.t-3
* @since 2006-2-2 W'_/6_c$!
* @version 1.0 ;Mj002.\G
*/ 4Y tk!oS`
public class HeapSort implements SortUtil.Sort{ ,m07p~,V
J-J3=JG
/* (non-Javadoc) H?}wl%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nm8w/Q5D`
*/ )-&nxOP
public void sort(int[] data) { ~SVQ;U)-
MaxHeap h=new MaxHeap(); )LswSV
h.init(data); Goj4`Hc
for(int i=0;i h.remove(); <<3+g"enno
System.arraycopy(h.queue,1,data,0,data.length); W._G0b4}
} +0pW/4x
Bt>}LLBS2
private static class MaxHeap{ PI7IBI
a'[)9:
void init(int[] data){ a@|.;#FF
this.queue=new int[data.length+1]; - 8syjKTg
for(int i=0;i queue[++size]=data; "2h5m4
fixUp(size); 'yNPhI
} "d?f:x3v^
} !cCg/
rrQ0qg
private int size=0; ?;8M^a/
,o&<WMD
private int[] queue; *4#on>
II#
public int get() { 9kd.j@C
return queue[1]; DyI2Ye
} 3#9M2O\T
7l}~4dm2J
public void remove() { nx :)k-p_[
SortUtil.swap(queue,1,size--); #D:RhqjK
fixDown(1); X'2Gi
} $f(agG]
file://fixdown <t6d)mJ%
private void fixDown(int k) { w$% BlqN
int j; ^4hc+sh0D
while ((j = k << 1) <= size) { pU[K%@sC
if (j < size %26amp;%26amp; queue[j] j++; ")\ *2d
if (queue[k]>queue[j]) file://不用交换 Q}z{AZ
break; ~mcZUiP9
SortUtil.swap(queue,j,k); Lnx2xoNk
k = j; ZW2s[p r
} 'X ~Ab
} `g8tq
private void fixUp(int k) { >;.*
while (k > 1) { wKrdcWI,Z
int j = k >> 1; %((cFQ9
if (queue[j]>queue[k]) HtS#_y%(
break; o(nHB g
SortUtil.swap(queue,j,k); E$&;]a
k = j; W#Cq6N
} Z[bv0Pr
} 7\ZL
SJF2k[da
} C0f[eA
P ]_Vz
} (T;1q^j
t.u{.P\Md\
SortUtil： z8tt+AU
aEZJNWv
package org.rut.util.algorithm; TR_(_Yd?36
0Mq6yu^
import org.rut.util.algorithm.support.BubbleSort; tl2Lq0
import org.rut.util.algorithm.support.HeapSort; L;kyAX@^
import org.rut.util.algorithm.support.ImprovedMergeSort; r6<ArX$Yl
import org.rut.util.algorithm.support.ImprovedQuickSort; ;S{ZC5
import org.rut.util.algorithm.support.InsertSort; rufRaar
import org.rut.util.algorithm.support.MergeSort; OHQ3+WJ
import org.rut.util.algorithm.support.QuickSort; M!{Rq1M
import org.rut.util.algorithm.support.SelectionSort; I *1#
import org.rut.util.algorithm.support.ShellSort; .Pqj6Ko9
#NSaY+V
/** w2s,
* @author treeroot 7=AO^:=bx
* @since 2006-2-2 v UJ sFR
* @version 1.0 pZW}^kg=
*/ s;~J2h[
public class SortUtil { N7%=K9
public final static int INSERT = 1; \q|e8k4p
public final static int BUBBLE = 2; oM m/!Dc
public final static int SELECTION = 3; &xF4p,7
public final static int SHELL = 4; REeD?u j
public final static int QUICK = 5; Q2??Kp]1
public final static int IMPROVED_QUICK = 6; =r=^bNO
public final static int MERGE = 7; Nj"_sA p
public final static int IMPROVED_MERGE = 8; N}e(.
public final static int HEAP = 9; Yf%[6Y{
>7eu'
public static void sort(int[] data) { Zm?G'06
sort(data, IMPROVED_QUICK); jCdZ}M($
} )i?{;%^
private static String[] name={ m|g$'vjk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y$"~^8"z
}; C]{V%jU
sP=2NqU3Q
private static Sort[] impl=new Sort[]{ \ltErd-
new InsertSort(), 9'1;-^U1
new BubbleSort(), k N uN4/
new SelectionSort(), INeWi=1
new ShellSort(), ?.|wfBI
new QuickSort(), c9/ 'i
new ImprovedQuickSort(), #m[w=Pu}
new MergeSort(), 8O}A/*1FJ
new ImprovedMergeSort(), 3w6JV+?
new HeapSort() Qg86XU%l
}; ^.B `Z{Jb
{&Gk.ODI7
public static String toString(int algorithm){ 0*'`%W+5
return name[algorithm-1]; z;Gbqr?{{
} Z{|.xgsY
*=KexOa9
public static void sort(int[] data, int algorithm) { OQX{<pQ6
impl[algorithm-1].sort(data); 8P'En+uE1|
} -;DE&~p
!ktA"Jx
public static interface Sort { faKrSmE!
public void sort(int[] data); {?kKpMNNn
} 9-e[S3ziM
a5Acqa
public static void swap(int[] data, int i, int j) { ,nuDoc
int temp = data; Z-;uzx
data = data[j]; oW\7q{l2)
data[j] = temp; [F9KC^%S
} @a7(*<".
} , T%pGku