[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; ;<@O^_+
} .*f4e3
int i1=l; q.QYn.CBZz
int i2=mid+1; BXv)zE=j
for(int cur=l;cur<=r;cur++){ a[cH@7W.#
if(i1==mid+1) GXK?7S0H
data[cur]=temp[i2++]; <0 idG
else if(i2>r) CgKSK0/a
data[cur]=temp[i1++]; RWQW/Gwx
else if(temp[i1] data[cur]=temp[i1++]; (a!,)
else % P)}(e6y
data[cur]=temp[i2++]; P1>X5:
} _NnOmwK7
} WA\f`SRF
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} ZDmk<}A-U
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改进后的归并排序: qWRMwvN{
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package org.rut.util.algorithm.support; h#ot)m|I
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import org.rut.util.algorithm.SortUtil; =~m"TQv
BD#;3?|
/** 8J1.(Mwb?
* @author treeroot DkKD~
* @since 2006-2-2 s9bP6N!,
* @version 1.0 p&l:937
*/ "a{f? .X.
public class ImprovedMergeSort implements SortUtil.Sort { BVp.A]
ppP?1Il`kb
private static final int THRESHOLD = 10; 2`m_"y
L1 VTq9[3
/* ]m>MB )9
* (non-Javadoc) bQjHQ"G
* 'Pu;]sC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0^Cx`xdX:
*/ }TL"v|ny6;
public void sort(int[] data) { JCfToFB
int[] temp=new int[data.length]; |c/rHEZ
mergeSort(data,temp,0,data.length-1); O_Q,!&*6
} e'&{KD,-T
n#/m7
private void mergeSort(int[] data, int[] temp, int l, int r) { iL1so+di
int i, j, k; o]U==
int mid = (l + r) / 2; >WX'oP(<
if (l == r) tH(#nx8
return; p2^OQK
if ((mid - l) >= THRESHOLD) RUu'9#fq
mergeSort(data, temp, l, mid); S:QEHd_C
else |-D.
insertSort(data, l, mid - l + 1); (5&"Y?#o,
if ((r - mid) > THRESHOLD) JN)t'm[kyE
mergeSort(data, temp, mid + 1, r); -<=<T@,
else kw'D2692
insertSort(data, mid + 1, r - mid); l !v#6#iq
Q-5wI$=
for (i = l; i <= mid; i++) { C:{'0m*jKs
temp = data; h+@t8Q;gGw
} N0C5FSH
for (j = 1; j <= r - mid; j++) { pE N`&'4
temp[r - j + 1] = data[j + mid]; OQvJdjST
} xd<68%Cn
int a = temp[l]; $49tV?q5
int b = temp[r]; ZT#G:a
for (i = l, j = r, k = l; k <= r; k++) { VuW19-G
if (a < b) { `( Gk_VAa
data[k] = temp[i++]; }.zn:e
a = temp; [-ecKPx
} else { [&:oS35O
data[k] = temp[j--]; 0 CS_-
b = temp[j]; HZ3<}`P_W
} B?'ti{p A9
} Z#04 ]
} ZlzFmNe60
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/** aXagiz\;
* @param data qDW/8b\^
* @param l Zj;!7ZuT1
* @param i Fz% n!d
*/ iDsjIW\j
private void insertSort(int[] data, int start, int len) { 8ZDq KQ1;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 14R))Dz"
} LmE-&
} @[Th{HTc.G
} ^8iy(
} gNeCnf#Xa
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堆排序： DH%X+r
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package org.rut.util.algorithm.support; ]{hfM
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import org.rut.util.algorithm.SortUtil; <#UvLll
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/** fu/c)D6u*m
* @author treeroot Xqy{=:0
* @since 2006-2-2 :vjbuqN]
* @version 1.0 `xSXGI
*/ `W9_LROD
public class HeapSort implements SortUtil.Sort{ fCKcv |
IYWD_}_ $
/* (non-Javadoc) s5.2gu|"%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <bH>\@p7}
*/ ,<BTv;4p
public void sort(int[] data) { -[=`bHo
MaxHeap h=new MaxHeap(); :MVD83?4
h.init(data); c1`o3gb
for(int i=0;i h.remove(); <Wd$6
System.arraycopy(h.queue,1,data,0,data.length); L`\ILJz
} R?W8l5CIk
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private static class MaxHeap{ xASjw?
D|xSO~M5
void init(int[] data){ pr2d}~q4{
this.queue=new int[data.length+1]; (n<xoV[e
for(int i=0;i queue[++size]=data; QMIXz[9w
fixUp(size); u1uY*p
} Abl=Ev
} ^^Ius ]
p"T4;QBxQ
private int size=0; O/Fzw^
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private int[] queue; 6jn<YR E-
NM4 n
public int get() { |89`O^
return queue[1]; u^ T2
} ]?kf;A@
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public void remove() { yY1&hop
SortUtil.swap(queue,1,size--); np~oF
fixDown(1); =$m|M m[a
} <Z vG&
file://fixdown HJ2]xe09
private void fixDown(int k) { 8Vq,J:+
int j; S\C
while ((j = k << 1) <= size) { }, ]W/
if (j < size %26amp;%26amp; queue[j] j++; 3}H94H)]a
if (queue[k]>queue[j]) file://不用交换 mJT7e
break; #hai3>9|B
SortUtil.swap(queue,j,k); 4[6A~iC_
k = j; Cc=`:ED+
} x>t:&Y M
} MPT[f
private void fixUp(int k) { F Hv|6zUX
while (k > 1) { +%FGti$[
int j = k >> 1; Xdjxt?*
if (queue[j]>queue[k]) X}^,g
break; W nVX)o
SortUtil.swap(queue,j,k); r`" ?K]rI
k = j; 6OVAsmE
} }C)
} }ulFW]A^7
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} g6N{Z e Wg
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} =6? 3c\
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SortUtil： }lWEbQ)(!
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package org.rut.util.algorithm; W$,c]/u|
h8nJ$jg
import org.rut.util.algorithm.support.BubbleSort; |,qz7dpe
import org.rut.util.algorithm.support.HeapSort; 65MR(+3
import org.rut.util.algorithm.support.ImprovedMergeSort; O10h(Wg
import org.rut.util.algorithm.support.ImprovedQuickSort; aG,N>0k8
import org.rut.util.algorithm.support.InsertSort; lqu1H&
import org.rut.util.algorithm.support.MergeSort; +`\C_i-
import org.rut.util.algorithm.support.QuickSort; @v|_APy#
import org.rut.util.algorithm.support.SelectionSort; 3EAu#c@q"
import org.rut.util.algorithm.support.ShellSort; MvObx'+
aN.Phn:
/** "Sl";.
* @author treeroot 1C:lXx$|
* @since 2006-2-2 ca-|G'q
* @version 1.0 8W#whK2El
*/ j5tA!o
public class SortUtil { "M2HiV
public final static int INSERT = 1; z$;z&X$j
public final static int BUBBLE = 2; Dk8" H>*
public final static int SELECTION = 3; <0pBu7a
public final static int SHELL = 4; J,k9?nkY /
public final static int QUICK = 5; jiz"`,-},O
public final static int IMPROVED_QUICK = 6; C2FewsRz
public final static int MERGE = 7; 8L.Y0_x
public final static int IMPROVED_MERGE = 8; ]{Iy<
public final static int HEAP = 9; 2,'m]`;GNr
`2Vc*R
public static void sort(int[] data) { $5|/X&"O)/
sort(data, IMPROVED_QUICK); &R>x;&Gj
} K@`F*^A}V
private static String[] name={ .\qZkk}2l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T+RfMEdr
}; E[^66(KR
*r$(lf
private static Sort[] impl=new Sort[]{ h9RG?r1
new InsertSort(), 79=w]y
new BubbleSort(), @~xNax&^
new SelectionSort(), r@^h,
new ShellSort(), }`M[%]MNc
new QuickSort(), QVm3(;&'
new ImprovedQuickSort(), jv?`9{-
new MergeSort(), Mo0+"`
new ImprovedMergeSort(), H5{d;L1[
new HeapSort() aB+Ux< -
}; }LN +V~
7;+:J;xf66
public static String toString(int algorithm){ F2:?lmhL<
return name[algorithm-1]; G(EiDo&
} <9B\('
98x]x:mgI_
public static void sort(int[] data, int algorithm) { O-@*xwD
impl[algorithm-1].sort(data); =i4Ds
} 1Y_Cd
_p<s!
public static interface Sort { JFIUD{>fp
public void sort(int[] data); hqmKUlo
} ;|5m;x/a
^duNEu0*
public static void swap(int[] data, int i, int j) { pc J5UJY
int temp = data; H~^am
data = data[j]; m(L]R(t
data[j] = temp; ML^c-xY(
} .;8T*
} %XMwjBM