[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; E%;'3Qykva
} &iGl)dDr
int i1=l; H]!y |p
int i2=mid+1; 9nG] .@H
for(int cur=l;cur<=r;cur++){ $>h#|?*?
if(i1==mid+1) %&]}P;&
data[cur]=temp[i2++]; R_1C+
else if(i2>r) | 5L1\O8#
data[cur]=temp[i1++]; gP`!MlY@
else if(temp[i1] data[cur]=temp[i1++]; Q./lX:
else %zelpBu+
data[cur]=temp[i2++]; fgp7 |;Y
} qA~D*=
} 1tr>D:c\
SQ Fey~
} n47=eKd70
v]BQIE?R /
改进后的归并排序: JyqFFZ&
jo|q,t
package org.rut.util.algorithm.support; aW6+Up+G*
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import org.rut.util.algorithm.SortUtil; z67=v9+7
w7Pe<vT
/** x@Y2jM
* @author treeroot ,|4Ye
* @since 2006-2-2 wU ; f
* @version 1.0 1IlR
*/ O\LW 8\M
public class ImprovedMergeSort implements SortUtil.Sort { |ber:1
R`**!ku
private static final int THRESHOLD = 10; #PrV)en
:1lE98=
/* XF7W'^
* (non-Javadoc) :HE]P)wz-
* `;_tt_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f~q&.,I(
*/ KJ)nGoP>
public void sort(int[] data) { _ <;Q=?'*
int[] temp=new int[data.length]; {.lF~cOu
mergeSort(data,temp,0,data.length-1); ft'iv
} ,SyUr/D
#LN I&5
private void mergeSort(int[] data, int[] temp, int l, int r) { \i,cL)HM
int i, j, k; rq1kj 8%2
int mid = (l + r) / 2; HEuM"2{DMM
if (l == r) *3/7wSV:
return; Hr+-ndH!Pq
if ((mid - l) >= THRESHOLD) VBX# !K1Q
mergeSort(data, temp, l, mid); r$#G%FMv
else 46zaxcY<!
insertSort(data, l, mid - l + 1); da2[
if ((r - mid) > THRESHOLD) #8z,'~\
mergeSort(data, temp, mid + 1, r); w}Upa(dU
else =_'cG:=)
insertSort(data, mid + 1, r - mid); 7RP_ ^Cr+
^c\IZ5
for (i = l; i <= mid; i++) { F3Y>hs):7
temp = data; & .?HuK
} ]hj1.V+
for (j = 1; j <= r - mid; j++) { +^J-'7Vt
temp[r - j + 1] = data[j + mid]; <]'"e]
} @g75T`N
int a = temp[l]; N4To#Q1w
int b = temp[r]; ys/mv'#>
for (i = l, j = r, k = l; k <= r; k++) { 9 <KtI7
if (a < b) { O$Vm#|$sq
data[k] = temp[i++]; gFT~\3jp=
a = temp; t%U[\\ic
} else { |nEVOy>'
data[k] = temp[j--]; s\W
b = temp[j]; M?B(<j1Ri
} IMGqJc,7
} ~B&*7Q7
} pIu H*4Vz
uit-Q5@~
/** UNQRtR/
* @param data X[Ek'=}
* @param l =4e=wAO(i
* @param i p{a]pG+3
*/ Ys$YI{
private void insertSort(int[] data, int start, int len) { v1C.\fL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Tq84Fn!HJ>
} T'M66kg
} Q==v!"Gi|
} jAK{<7v4U
} #tZf>zrs
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堆排序： O4/n!HOb
&ZE\@Vc
package org.rut.util.algorithm.support; ;x-H$OZX
|2@en=EYk
import org.rut.util.algorithm.SortUtil; v{2DBr
tin|,jA =
/** ;a#*|vx
* @author treeroot *9vA+uN
* @since 2006-2-2 ey)u7-O
* @version 1.0 V->%)d3i
*/ b!]0mXU
public class HeapSort implements SortUtil.Sort{ s$Zq/l$1x
*e<Eu>fW#&
/* (non-Javadoc) fcICFReyV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W3/ 7BW`
*/ 5)yOw|Bd
public void sort(int[] data) { (kC} ,}
MaxHeap h=new MaxHeap(); tQ~<i %;
h.init(data); ~g1, !Wl
for(int i=0;i h.remove(); X B*}P
System.arraycopy(h.queue,1,data,0,data.length); m*!f%}T
} 4C1FPrh
k=7Gr;;l=p
private static class MaxHeap{ C,r`I/;
h4anr7g{
void init(int[] data){ EF=dXm/\
this.queue=new int[data.length+1]; 7"q+"0G
for(int i=0;i queue[++size]=data; ~*!u
fixUp(size); g(<T u^F
} k\pDJ7wF^
} Mi}I0yhVm
rQEi/
private int size=0; :wU_-{>>2
*v rWA
private int[] queue; !\0F.*
fYhR#FVI
public int get() { D#7_TKX
return queue[1]; }t|Plz
} 7%9)C[6NSs
l>~`;W
public void remove() { h}|6VJ@.
SortUtil.swap(queue,1,size--); P>Q{He:
fixDown(1); /zG+]
} #9`rXEz
file://fixdown wn+j39y?ZY
private void fixDown(int k) { j/9WOIfa
int j; \2Og>{"U
while ((j = k << 1) <= size) { Xlv#=@;O]
if (j < size %26amp;%26amp; queue[j] j++; A)hhnb0o
if (queue[k]>queue[j]) file://不用交换 !7*(!as
break; O4EIE)c
SortUtil.swap(queue,j,k); a*Ss -y
k = j; RzS|dGNQE
} bar0{!Y"
} 5g``30:o
private void fixUp(int k) { WRD A `
while (k > 1) { 2@ 9pr
int j = k >> 1; W|dpFh`
if (queue[j]>queue[k]) qO-C%p [5
break; *bA+]&dj\
SortUtil.swap(queue,j,k); s>|Z7[*
k = j; 0e+W/Tq
} >5;N64]!)
} Y{Da+
e&QS#k
} /vjGjb=3U
s=d+GMa
} yGiP[d|tRc
W]]q=c%2
SortUtil： g5#CN:%f
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package org.rut.util.algorithm; 5`{vE4A]q
)O3jQ_q=
import org.rut.util.algorithm.support.BubbleSort; QjA&IZEC
import org.rut.util.algorithm.support.HeapSort; -Z%F mv8
import org.rut.util.algorithm.support.ImprovedMergeSort; u7;`4P:o@
import org.rut.util.algorithm.support.ImprovedQuickSort; 99e*]')A%
import org.rut.util.algorithm.support.InsertSort; XFW5AP
import org.rut.util.algorithm.support.MergeSort; w[(n>
import org.rut.util.algorithm.support.QuickSort; {-@~Q.&}v
import org.rut.util.algorithm.support.SelectionSort; NZLXN
import org.rut.util.algorithm.support.ShellSort; Ly9Q}dL
3Y z]8`C
/** 5W+{U8\
* @author treeroot +UxI{,L
* @since 2006-2-2 {A|bBg1!
* @version 1.0 =fl%8"%N&
*/ SLkuT`*
public class SortUtil { sVu k
public final static int INSERT = 1; .H8mRvd?
public final static int BUBBLE = 2; %}C9
public final static int SELECTION = 3; &1wpGJqm
public final static int SHELL = 4; qZaO&"q
public final static int QUICK = 5; mD7}t
public final static int IMPROVED_QUICK = 6; *z0K%@M
public final static int MERGE = 7; D(Qa>B"1
public final static int IMPROVED_MERGE = 8; W57&\PXYn
public final static int HEAP = 9; kMy<G8 s
nv"G;W
public static void sort(int[] data) { p8=|5.
sort(data, IMPROVED_QUICK); Qyz>ZPu}sz
} u4YM^* S.
private static String[] name={ &Yp+k}XU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Xo Y7/&&
}; R<_?W#$j
6xHi\L
private static Sort[] impl=new Sort[]{ \c{R <Hh
new InsertSort(), ="\*h(
new BubbleSort(), W;q+,Io
new SelectionSort(), Q',m{;;
new ShellSort(), !.EcP=S
new QuickSort(), )1f+ld%R
new ImprovedQuickSort(), o/cr{>"N
new MergeSort(), nq'M?c#E
new ImprovedMergeSort(), R:A'&;S
new HeapSort() I!0JG`&
}; HA!t$[_Ve
0Uw ^FcW
public static String toString(int algorithm){ WSLy}@`Vx
return name[algorithm-1]; :uo[&&c
} EKuSnlTXba
\~>e_;
public static void sort(int[] data, int algorithm) { ExCM<$,
impl[algorithm-1].sort(data); WL l_'2h
} T~X41d\
q#NR32byF
public static interface Sort { aG! *WHt
public void sort(int[] data); Ky kSFB
} xc;DdK=1X
M)JADX
public static void swap(int[] data, int i, int j) { ,=|4:F9
int temp = data; ` W4dx&
data = data[j]; rjUBLY1(
data[j] = temp; V^n0GJNo
} JrDHRIkgm
} QU/fT_ORw