[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; bj(U?$
} eJE?H]
int i1=l; 2f`u?T
int i2=mid+1; s['F?GWg
for(int cur=l;cur<=r;cur++){ ^C>i(j&
if(i1==mid+1) Lcplc"C
data[cur]=temp[i2++]; 9C[3w[G~C
else if(i2>r) MR%M[SK1
data[cur]=temp[i1++]; Rb<aCX
else if(temp[i1] data[cur]=temp[i1++]; 3s\2 9gq
else !40{1U&@a`
data[cur]=temp[i2++]; LYGFEjS[
} V!c{%zd
} {"y{V
j9%u&
} 56u'XMB?
g6Qzkvw)
改进后的归并排序: :g'"*VXYB
1 dz&J\|E#
package org.rut.util.algorithm.support; /-E>5wU
]N-K`c]
import org.rut.util.algorithm.SortUtil; |k)h' ?
F0bmGDp@-
/** (Z)
* @author treeroot k<"ZNQm$.
* @since 2006-2-2 HYLU]9aH8
* @version 1.0 ?F*gFW_k
*/ ^o!K0t*
public class ImprovedMergeSort implements SortUtil.Sort { f|?i6.N>f
V;=SncUb
private static final int THRESHOLD = 10; >2Al+m<w
CcgCKT
/* =/.[&DG
* (non-Javadoc) LH]nJdq?)
* g-oHu8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #PoUCRRC
*/ `*9W{|~Gwx
public void sort(int[] data) { N-3w)23*:
int[] temp=new int[data.length]; h_?D%b~5
mergeSort(data,temp,0,data.length-1); h\C
} 9g"a`a?c
PLg`\|
private void mergeSort(int[] data, int[] temp, int l, int r) { 2 'xT%
int i, j, k; *`ji2+4Sjw
int mid = (l + r) / 2; /4w&! $M-
if (l == r) {qx}f^WV
return; +q) ^pCC
if ((mid - l) >= THRESHOLD) $tj[*
mergeSort(data, temp, l, mid); wi:]oo#
else ..'^1IOA
insertSort(data, l, mid - l + 1); ~?E x?!\9R
if ((r - mid) > THRESHOLD) jFw?Ky2
mergeSort(data, temp, mid + 1, r); M,e_=aq
else :uZcN
insertSort(data, mid + 1, r - mid); HkJ$r<J2
SR%h=`t
for (i = l; i <= mid; i++) { \4~uop,Nb+
temp = data; ff?:_q+.N
} 65=i`!f
for (j = 1; j <= r - mid; j++) { N#C,_ k
temp[r - j + 1] = data[j + mid]; l *yml
} 1`5d~>fV
int a = temp[l]; qW][Q%'lt
int b = temp[r]; /JtKn*?}:>
for (i = l, j = r, k = l; k <= r; k++) { \W(C=e
if (a < b) { hn)mNb!
data[k] = temp[i++]; a5?Rj~h!<
a = temp; Pf]6'?kQ
} else { 3VB{Qj
data[k] = temp[j--]; $eX; 2
b = temp[j]; 4tCyd5u a8
} m-5Dbx!j
} zYYc#N/
} E>KV1P
IBQmm(+v
/** tE9%;8;H
* @param data syv6" 2Z'B
* @param l Xko[Z;4v8'
* @param i K)sO
*/ opjrU$<]N
private void insertSort(int[] data, int start, int len) { NL0X =i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "npj%O<bd
} )<1M'2
} ]5YG*sD4
} lk%rE
} bxc#bl3
IM}#k$vM:
堆排序： J ;i/X;^
bMxzJRrNg
package org.rut.util.algorithm.support; 8D;>]>
]EE}ax%#aq
import org.rut.util.algorithm.SortUtil; :?U1^!$$1
@PU%BKe
/** ,N<xyx.
* @author treeroot xx#;)]WT
* @since 2006-2-2 9%$4Ux*q
* @version 1.0 "So+
*/ `Q,moz
public class HeapSort implements SortUtil.Sort{ Qi w "x,
*9`@
/* (non-Javadoc) ]{0 2!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zc{at}{
*/ ^$6EO)<
public void sort(int[] data) { )C<c{mjk(
MaxHeap h=new MaxHeap(); qI) Yzc/
h.init(data); n>+M4Zb
for(int i=0;i h.remove(); n3g3(}Q0
System.arraycopy(h.queue,1,data,0,data.length); G;yf]xFd
} -SlLX\>p
0V}%'Ec<e
private static class MaxHeap{ [L{q
@2L+"=u#
void init(int[] data){ m.&z:`x[
this.queue=new int[data.length+1]; 3EI$tP@4
for(int i=0;i queue[++size]=data; U9SByqa1
fixUp(size); b_|`jHes
} >(|T]u](q
} WDP$w(M
t1 OnA#]/_
private int size=0; *<i { Mb Q
K`M8[ %S
private int[] queue; @@# ^G8+l
va:5pvt2&
public int get() { KaauX m
return queue[1]; f]qPxRw
} {3i.U028]
0AZ Vc
public void remove() { `$AX!,<!G
SortUtil.swap(queue,1,size--); H CZ#7Z
fixDown(1); Vge9AH:op
} jRmv~]
file://fixdown !eMz;GZ
private void fixDown(int k) { q#xoM1
int j; GASDkVoij
while ((j = k << 1) <= size) { $GSn#} yz
if (j < size %26amp;%26amp; queue[j] j++; ^Cst4=:W
if (queue[k]>queue[j]) file://不用交换 !.?2zp~
break; 3T'9_v[Y
SortUtil.swap(queue,j,k); & VJ+X|Z
k = j; [W,Ej
} i ?%;s5<
} d!D#:l3;
private void fixUp(int k) { >KNiMW^V
while (k > 1) { X"z^4?Aj+
int j = k >> 1; K pDKIi
if (queue[j]>queue[k]) MD1n+FgTu
break; L09YA
SortUtil.swap(queue,j,k); ||;V5iR:
k = j; >OgA3)X
} F *=>=
} 7.,C'^ci
k-Hy>5;
} Eh^c4x
-lQ8 &eB
} B36_OH
NoB)tAvw
SortUtil： jL8.*pfv
8doKB<#_+=
package org.rut.util.algorithm; Sp]"Xr)
5V':3o;D__
import org.rut.util.algorithm.support.BubbleSort; <~X4&E]rT_
import org.rut.util.algorithm.support.HeapSort; ,6=j'j1#a
import org.rut.util.algorithm.support.ImprovedMergeSort; M2W4 RovfR
import org.rut.util.algorithm.support.ImprovedQuickSort; z\]]d?d?;
import org.rut.util.algorithm.support.InsertSort; _ho9}7 >
import org.rut.util.algorithm.support.MergeSort; :XC~G&HuF6
import org.rut.util.algorithm.support.QuickSort; Cvry8B
import org.rut.util.algorithm.support.SelectionSort; UMILAoR
import org.rut.util.algorithm.support.ShellSort; bBk_2lg=4)
y'(( tBWa!
/** s/"&k
* @author treeroot n0bm 'qw
* @since 2006-2-2 T`mG+"O
* @version 1.0 RP9#P&Qk
*/ (u-K^xC
public class SortUtil { 5Tag-+
public final static int INSERT = 1; v*iD)k:|t
public final static int BUBBLE = 2; 3k(A&]~v
public final static int SELECTION = 3; 2w_[c.
public final static int SHELL = 4; &b'IYoe
public final static int QUICK = 5; J~Uq'1?
public final static int IMPROVED_QUICK = 6; rE$0a-d2B
public final static int MERGE = 7; 8s16yuM
public final static int IMPROVED_MERGE = 8; G8z.JX-7g
public final static int HEAP = 9; i/E"E7
Y)H~*-vGu
public static void sort(int[] data) { H(Pzo+k*
sort(data, IMPROVED_QUICK); \5M1;
} Q=9Ce@[
private static String[] name={ fUx;_GX?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ', ~
}; U2<8U
2n+tc
private static Sort[] impl=new Sort[]{ O$zXDxn
new InsertSort(), QiC}hj$
new BubbleSort(), ]s_,;PGU
new SelectionSort(), iga.B
new ShellSort(), ~ES6Qw`Oe
new QuickSort(), ywQ[>itMa
new ImprovedQuickSort(), S9RH&/^H
new MergeSort(), yhm6%
new ImprovedMergeSort(), znnnqR0us
new HeapSort() "`g5iUHqUl
}; g]&7c:/
1i3;P/
public static String toString(int algorithm){ [wOz<<
return name[algorithm-1]; CGw,RNV
} #djby}hi
m&vuBb3
public static void sort(int[] data, int algorithm) { $0 ]xeD0X
impl[algorithm-1].sort(data); 8uAA6h+
} =Ot|d #_
=D;n#n7
public static interface Sort { +*uaB
public void sort(int[] data); 9UDanj P
} \.ukZqB3 0
f|f)Kys%5
public static void swap(int[] data, int i, int j) { 4N6JKS
int temp = data; rDI}X?JmX
data = data[j]; Lmsc~~
data[j] = temp; 8]h~jNku
} 5tx!LGOK
} @n,V2`"