[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; ZERUvk
} {^9,Dy_D
int i1=l; PK3)M'[
int i2=mid+1; gq[}/E0e
for(int cur=l;cur<=r;cur++){ '.atbl
if(i1==mid+1) WKBPqfC
data[cur]=temp[i2++]; gU>Y
else if(i2>r) a%ec: %
data[cur]=temp[i1++]; 7H[#
else if(temp[i1] data[cur]=temp[i1++]; /.05rTpp
else QfU 0*W?r
data[cur]=temp[i2++]; GfQMdLy\Z
} 5#d"]7
} bm%2K@ /U
8[f]9P/i
} xQ1&j,R]
@)VJ,Ql$Y
改进后的归并排序: O:r<es1
CJjma=XH
package org.rut.util.algorithm.support; /c/!13|
H|F>BjXn5
import org.rut.util.algorithm.SortUtil; \R&`bAdk
K]@6&H-b|
/** 2|EHNy!
* @author treeroot BAmH2"
* @since 2006-2-2 6$SsdT|8B
* @version 1.0 D8`,PXtV
*/ zfi{SO l
public class ImprovedMergeSort implements SortUtil.Sort { U@D=.6\B
}'kk}2ej`
private static final int THRESHOLD = 10; ]|Vm!Q
L4.yrA-]C%
/* ,2H5CFX/
* (non-Javadoc) OD>-^W t;%
* ; {I{X}b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rVQ:7\=Z
*/ u9mMkzgSkP
public void sort(int[] data) { /CKkT.Le
int[] temp=new int[data.length]; xkUsZ*X8B
mergeSort(data,temp,0,data.length-1); Ofqe+C
} ~<v`&Gm?"
plfz)x3
private void mergeSort(int[] data, int[] temp, int l, int r) { X~GZI*P
int i, j, k; &xH>U*c
int mid = (l + r) / 2; f=~@e#U
if (l == r) i-sE\m
return; xZ`t~4qR
if ((mid - l) >= THRESHOLD) zd#qBj]g
mergeSort(data, temp, l, mid); 3p!R4f)GN
else _3A$zA
insertSort(data, l, mid - l + 1); #:' P3)&
if ((r - mid) > THRESHOLD) %PlPXoG=
mergeSort(data, temp, mid + 1, r); .h~)|"uzW
else %<1fj#X8
insertSort(data, mid + 1, r - mid); aM?7'8/
'-w G
for (i = l; i <= mid; i++) { J5J3%6I
temp = data; B+zq!+ HJ
} * +A!12s@
for (j = 1; j <= r - mid; j++) { &??(EA3
temp[r - j + 1] = data[j + mid]; 5Odi\SJ&
} z_JZx]*/
int a = temp[l]; 8qS)j1.!
int b = temp[r]; 1%EY!14G+
for (i = l, j = r, k = l; k <= r; k++) { ?_<ZCH
if (a < b) { ,iSs2&$m
data[k] = temp[i++]; 'kW`62AX
a = temp; 7 hnTHL
} else { F;q I^{m2
data[k] = temp[j--]; .^JID~<?#
b = temp[j]; ?0'bf y]
} |C>Yd*E,C
} H7qda'%>
} VJ_E]}H
9Eg'=YJ
/** Wt8;S$!=R
* @param data 9=3V}]^M
* @param l "]MF =-v
* @param i ;=h^"et
*/ HLk}E*.mC
private void insertSort(int[] data, int start, int len) { Ih,~h[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P7u5Ykc*
} 7qL]_u[^
} fVf.u'.8
} )%ja6Vg
} jgEiemh&
[FyE{NfiJ%
堆排序： w`#lLl B
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package org.rut.util.algorithm.support; vj{h*~
Ap}:^k5{
import org.rut.util.algorithm.SortUtil; p[Q
1q\U (^
/** m?<C\&)6x
* @author treeroot 0JNG\ARC
* @since 2006-2-2 d6hWmZVC
* @version 1.0 P\N`E?lJL
*/ g-*@I`k[
public class HeapSort implements SortUtil.Sort{ 3QV|@5L`[
.'.|s?s
/* (non-Javadoc) >DbG$V<v'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;Rwr5
*/ Z71"d"
public void sort(int[] data) { ?c>j^}A/N
MaxHeap h=new MaxHeap(); d>vGx
h.init(data); H,H'bd/
for(int i=0;i h.remove(); Q`19YX
System.arraycopy(h.queue,1,data,0,data.length); eKStt|M'
} pOH_ CXw
kk!}mbA_}
private static class MaxHeap{ 2^qY,dL
7~|o_T
void init(int[] data){ +8BH%f}X
this.queue=new int[data.length+1]; 7qzI]
for(int i=0;i queue[++size]=data; [IV8
fixUp(size); Ns1u0$fg
} \f{C2d/6j
} W*U\79H
AeUwih. 4
private int size=0; FirmzB Il5
AE7>jkHB
private int[] queue; 7Bmt^J5i&t
C'5i>;
public int get() { :Z=A,G
return queue[1]; EzG7RjW
} #~p1\['|M
`+* Mr
public void remove() { pOS.`rSK
SortUtil.swap(queue,1,size--); `7N[rs9|S
fixDown(1); C@Wm+E~;8
} Q>Q$BCD5
file://fixdown >Y{.)QS
private void fixDown(int k) { IS!B$
int j; *y N,e.t
while ((j = k << 1) <= size) { 7 v`Y*D
if (j < size %26amp;%26amp; queue[j] j++; 9*,5R,#
if (queue[k]>queue[j]) file://不用交换 ld2\/9+n
break; 2I>CA[qp
SortUtil.swap(queue,j,k); %W`pTvF
k = j; elP`5BuN
} y4shW|>5_
} %AW
private void fixUp(int k) { #j;&g1
while (k > 1) { |0-5-.
int j = k >> 1; O[`n{Vl/
if (queue[j]>queue[k]) y f+/Kj< a
break; ]Fjz+CGg
SortUtil.swap(queue,j,k); 9"<)DS
k = j; a(BC(^1!
} S)Ld^0w
} \h #vL
KWN&nP +
} (6JD<pBm
(dO4ww@O
} Ye1P5+W(
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SortUtil： ]p#Zdm1EL
KN+*_L-
package org.rut.util.algorithm; TXy*-<#vR
5(DCq(\P*
import org.rut.util.algorithm.support.BubbleSort; 6= 9
import org.rut.util.algorithm.support.HeapSort; JQbI^ef_;
import org.rut.util.algorithm.support.ImprovedMergeSort; +F67g00T|
import org.rut.util.algorithm.support.ImprovedQuickSort; OjZ+gl}
import org.rut.util.algorithm.support.InsertSort; v3aiX
import org.rut.util.algorithm.support.MergeSort; Vwv O@G7A
import org.rut.util.algorithm.support.QuickSort; `CHgTkv
import org.rut.util.algorithm.support.SelectionSort; GbZA3.J]yl
import org.rut.util.algorithm.support.ShellSort; x28Bz*O
]CHMkuP[k
/** ?f&*mp
* @author treeroot KE(kR>OB]
* @since 2006-2-2 LXw&d]P
* @version 1.0 %7V?7BE
*/ jP}N^
public class SortUtil { R\X=Vg
public final static int INSERT = 1; Dy8Go4
public final static int BUBBLE = 2; Z"E+ TX
public final static int SELECTION = 3; ew"[]eZ:ut
public final static int SHELL = 4; u`
public final static int QUICK = 5; v8wN2[fC
public final static int IMPROVED_QUICK = 6; d5WE^H)E.
public final static int MERGE = 7; I#9K/[
public final static int IMPROVED_MERGE = 8; r{Fu|aoa;5
public final static int HEAP = 9; qLPI^g,
iOD9lR`s
public static void sort(int[] data) { )fCl<KG*
sort(data, IMPROVED_QUICK); Kk??}
} b!UT<:o
private static String[] name={ {`1zVTp[<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Dcp,9"yt%
}; 0jg-]
A)VOv`U@2
private static Sort[] impl=new Sort[]{ oM< &4F
new InsertSort(), x&8?/BR
new BubbleSort(), ~%sDQt\S
new SelectionSort(), OGae]O<
new ShellSort(), bg 7b!t1F
new QuickSort(), g[Yok`e[
new ImprovedQuickSort(), geT<vh Z6
new MergeSort(), UB(8N7_/
new ImprovedMergeSort(), r4_ c~\jH
new HeapSort() @o>2:D1G
}; $Y ]*v)}X
qnT:x{o
public static String toString(int algorithm){ NP|U |zn
return name[algorithm-1]; 4#=^YuKaF1
} c{&sf y
9$Hgh7'hvs
public static void sort(int[] data, int algorithm) { ql_aDoj
impl[algorithm-1].sort(data); `Y+p7*Qr2
} eJ?SLMLY
9]kWM]B)o
public static interface Sort { 2>s:wABb /
public void sort(int[] data); Ou,B3kuQ+
} &Cdd
67f#Z&r2k
public static void swap(int[] data, int i, int j) { Ho\z^w+T`
int temp = data; v'Lckw@G4
data = data[j]; W]reQ&<Z
data[j] = temp; eBBh/=Zc
} lYq R6^
} "_5av!;A g