[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; 6|^0_6_
} %9X{{_
int i1=l; s@s/'^`
int i2=mid+1; \6:>{0\
for(int cur=l;cur<=r;cur++){ 2h<U
if(i1==mid+1) y@`~9$
data[cur]=temp[i2++]; /VO^5Dnb
else if(i2>r) wLUF v(&C
data[cur]=temp[i1++]; U{}!y3[wK
else if(temp[i1] data[cur]=temp[i1++]; tOM(U-7Z&
else Px#$uU
data[cur]=temp[i2++]; (f~gEKcB2u
} |!Fk2Je,
} &n|*uLn
-;>#3O-
} [f/.!@sj
um[!|g/
改进后的归并排序: rrcwtLNbu
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package org.rut.util.algorithm.support; sPy2/7Wqd
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import org.rut.util.algorithm.SortUtil; Y\p$SN
8R}K?+]
/** @!<d0_dnC
* @author treeroot V&[eSVY?
* @since 2006-2-2 f05=Mc&)
* @version 1.0 x'qWM/
*/ z]$>+MH_
public class ImprovedMergeSort implements SortUtil.Sort { ?'wsIH]m
Vho0eV=
private static final int THRESHOLD = 10; @KA1"Wb_
sa9fK Z'q
/* ~{M@?8wi
* (non-Javadoc) j#VIHCzlr
* wbi3lH:;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U^rm:*f
*/ e\9g->DUs
public void sort(int[] data) { _!!}'fMC
int[] temp=new int[data.length]; VNj@5s
mergeSort(data,temp,0,data.length-1); ]'k[u
} ?'sXgo.}
!5UfWk\G
private void mergeSort(int[] data, int[] temp, int l, int r) { .45^=2NGmQ
int i, j, k; +j[`,5oS
int mid = (l + r) / 2; :Q-oV8t{
if (l == r) d0 -~|`5
return; @]=f?+y[ 2
if ((mid - l) >= THRESHOLD) HE;V zR
mergeSort(data, temp, l, mid); ZXt?[Ll
else :}9j^}"c3
insertSort(data, l, mid - l + 1); /K|:9Q$K6
if ((r - mid) > THRESHOLD) FZXyfZw!|
mergeSort(data, temp, mid + 1, r); OJ/SYZ.r
else {155b0
insertSort(data, mid + 1, r - mid); .GCR!V
O@jqdJu
for (i = l; i <= mid; i++) { S;=_;&68?
temp = data; 1,`H:%z%
} \A<v=VM|
for (j = 1; j <= r - mid; j++) { :wipE]~4t
temp[r - j + 1] = data[j + mid]; V"#Jk!k9k
} Au5rR>W
int a = temp[l]; 6peyh_
int b = temp[r]; 2\0Oji\6
for (i = l, j = r, k = l; k <= r; k++) { os$nL'sq
if (a < b) { O?ktWHUx
data[k] = temp[i++]; =& -[TPW
a = temp; OOB^gf}$'
} else { zZ=$O-&%
data[k] = temp[j--]; YH\j@^n
b = temp[j]; `FJ|W6%
} {Q~7M$
} Hm9<fQuM
} A-wRah.M
[w+Q^\%bN
/** hNbIpi=
* @param data >]&X ^V%Q#
* @param l V=}1[^
* @param i ~R.dPUr
*/ n"G`b
private void insertSort(int[] data, int start, int len) { maC>LBa2/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U<Jt50O
} Zw$ OKU
} \[#t<dD
} G{RTH_p
} Mw^*yW
M35Ax],:^
堆排序： Bo r7]#
y3IWfiz>/d
package org.rut.util.algorithm.support; ssl&5AS
8h.V4/?
import org.rut.util.algorithm.SortUtil; ^%#grX#
'Kz9ygZy
/** {'R)4hL
* @author treeroot Y=2Un).&
* @since 2006-2-2 JsQ6l%9
* @version 1.0 kX2d7yQZz
*/ l,d,T
public class HeapSort implements SortUtil.Sort{ 6RK\}@^=K
5~r2sCDPk
/* (non-Javadoc) >I<PO.c!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G7-!`-Nk
*/ - k`.j
public void sort(int[] data) { "C74
MaxHeap h=new MaxHeap(); =|SdVv
h.init(data); 4#)6.f~
for(int i=0;i h.remove(); &ao(!/im
System.arraycopy(h.queue,1,data,0,data.length); @Zm Jz
} `ZGcgO<c\
4tJa-7
private static class MaxHeap{ 5=Lq=,K$
8&E}n(XE
void init(int[] data){ C6QbBo
this.queue=new int[data.length+1]; _x %1F
for(int i=0;i queue[++size]=data; *Km7U-BG
fixUp(size); w>979g
} 8;n_TMb
} 6E^~n
`w<J25
private int size=0; QUOKThY?
sN/+
private int[] queue; Gi7RMql6Q
`# ^0cW
public int get() { QxpKX_@Q5
return queue[1]; YYUe)j{T
} gx;O6S{
)^/0cQcJ
public void remove() { fgCT!s7z
SortUtil.swap(queue,1,size--); `\b+[Nes
fixDown(1); *jCW.ZLY
} J(iV0LAZb
file://fixdown "2hh-L7ql
private void fixDown(int k) { u\g,.C0
int j; LE;g 0s
while ((j = k << 1) <= size) { 6 hiC?2b{x
if (j < size %26amp;%26amp; queue[j] j++; h$fe -G#
if (queue[k]>queue[j]) file://不用交换 u%2KwRQ
break; BHr|.9g]%%
SortUtil.swap(queue,j,k); $YM_G=k
k = j; TlRk*/PlJ
} Kf.T\V4%
} <qeCso
private void fixUp(int k) { {9'M0=
while (k > 1) { V#^yX%
int j = k >> 1; 4/*q0M{}B
if (queue[j]>queue[k]) _T*AC.
break; LP<<'(l`
SortUtil.swap(queue,j,k); |t6~%6^8
k = j; 3,6Ox45
} fN[8N$1-
} xPC"c*
p538r[f<
} TV:<TR
`X8@/wf#
} fRHKQ(a#
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SortUtil： FPv"N'/
l(:kfR~AC
package org.rut.util.algorithm; 2\@Z5m3B
&/WAZs$2n
import org.rut.util.algorithm.support.BubbleSort; 6|=j+rScv
import org.rut.util.algorithm.support.HeapSort; ];FtS>\x
import org.rut.util.algorithm.support.ImprovedMergeSort; %ROwr[Dj=
import org.rut.util.algorithm.support.ImprovedQuickSort; [Z<Z;=t
import org.rut.util.algorithm.support.InsertSort; |NMO__l@
import org.rut.util.algorithm.support.MergeSort; [1(FgyE
import org.rut.util.algorithm.support.QuickSort; dM]#WBOPy
import org.rut.util.algorithm.support.SelectionSort; o`?zF+M0
import org.rut.util.algorithm.support.ShellSort; OJ3UE(,I=
sb.J bE8
/** Eipp~GD
* @author treeroot vsMmCd)7U
* @since 2006-2-2 (^: p
* @version 1.0 2@LbfoA
*/ y4jU{,
public class SortUtil { S`=WF^
public final static int INSERT = 1; -Kxc$}
public final static int BUBBLE = 2; V|FrN*m
public final static int SELECTION = 3; )K0i@hM(n
public final static int SHELL = 4; $3;Upgv
public final static int QUICK = 5; 8<dOMp;}r
public final static int IMPROVED_QUICK = 6; f_\_9o"l
public final static int MERGE = 7; GP,<`l&
public final static int IMPROVED_MERGE = 8; I1=(. *B}
public final static int HEAP = 9; ;=~Xr"(/z
k1}hIAk3u
public static void sort(int[] data) { S!Jh2tsg`-
sort(data, IMPROVED_QUICK); #R5U
} ,=PKd&
private static String[] name={ 6"QEJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j1U 5~%^
}; PCE4W^ns
OAe#Wf!c
private static Sort[] impl=new Sort[]{ tP(h9|[N
new InsertSort(), bcz-$?]
new BubbleSort(), l-O$m
new SelectionSort(), l]!B#{
new ShellSort(), pv# 2]v
new QuickSort(), xeA#u J
new ImprovedQuickSort(), bB6[Xj{
new MergeSort(), C/tr$.2H=
new ImprovedMergeSort(), WUoOGbA `
new HeapSort() &M[f&_"8Q
}; WES#ZYtT
:qj<p3w~}
public static String toString(int algorithm){ q,l)I+
return name[algorithm-1]; Uems\I0
} sqO<J$tz
7"2b H
public static void sort(int[] data, int algorithm) { ?M}S|dsmE
impl[algorithm-1].sort(data); l-)Bivoi
} Q*ju sm
_8fA?q=
public static interface Sort { JK)qZ=
public void sort(int[] data); b{cU<;G)y.
} 0b-?q&*_
p]&j;H.
public static void swap(int[] data, int i, int j) { ;hDa@3|]34
int temp = data; <+U|dX
data = data[j]; _D;@v?n6!O
data[j] = temp; *@S@x{{s
} ^vni&sJ
} }DjYGMrTB