[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; eEZlVHM;O
} I;m@cSJ|j
int i1=l; @U.}Ei
int i2=mid+1; _TcQ12H 5<
for(int cur=l;cur<=r;cur++){ kd4*Zab
if(i1==mid+1) FEi,^V
data[cur]=temp[i2++]; \,#4+&4b
else if(i2>r) ?}Ptb&Vk(
data[cur]=temp[i1++]; J1ro\"
else if(temp[i1] data[cur]=temp[i1++]; ]~ 8N
else Mw7UU1 ei
data[cur]=temp[i2++]; xcRrI|?eC
} A(sx5Ynp
} LUVJ218p
@:&dOqQ
} `e;Sjf<
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改进后的归并排序: #K*q(ei,7h
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package org.rut.util.algorithm.support; [goPmVe+
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import org.rut.util.algorithm.SortUtil; ieoUZCO^r\
=y/Lbe}:
/** /*2W?ZM~H
* @author treeroot X?xm1|\
* @since 2006-2-2 a9JJuSRC
* @version 1.0 3>3ZfFC
*/ f5XcBW9E
public class ImprovedMergeSort implements SortUtil.Sort { 0~5}F^8[L
&I_!&m~
private static final int THRESHOLD = 10; r<H^%##,w
R2f,a*>
/* 2>$L>2$
* (non-Javadoc) ! r\ktX
* wm[d5A4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \Le#+P
*/ zq>"a&Y,
public void sort(int[] data) { (MU7
int[] temp=new int[data.length]; F?Nk:# V
mergeSort(data,temp,0,data.length-1); =umS^fJ5`
} 2*E<G|-F
-mdPqVIJn:
private void mergeSort(int[] data, int[] temp, int l, int r) { rxA)&
int i, j, k; NGGd6V%'-
int mid = (l + r) / 2; /P}tgcs
if (l == r) :iiTz$yk
return; bvvx(?!
if ((mid - l) >= THRESHOLD) 62E(=l
mergeSort(data, temp, l, mid); I9&<:`
else / UBAQ8TR
insertSort(data, l, mid - l + 1); DuZ]g#
if ((r - mid) > THRESHOLD) &,|uTIs
mergeSort(data, temp, mid + 1, r); 9:5NX3"p
else UZ0O j5B.
insertSort(data, mid + 1, r - mid); K`2DhJC
}eK*)
for (i = l; i <= mid; i++) { \zDV|n~{w
temp = data; r{;4(3E2
} ur5n{0#
for (j = 1; j <= r - mid; j++) { RtEkd_2
temp[r - j + 1] = data[j + mid]; ;!Bkk9r"H
} i<![i5uAI
int a = temp[l]; ]c+'SJQ
int b = temp[r]; j0M;2 3@[
for (i = l, j = r, k = l; k <= r; k++) { YR#1[fe*_
if (a < b) { 0M.[) @
data[k] = temp[i++]; ZS;kCdL
a = temp; ZXkAw sr
} else { 7:<>#
data[k] = temp[j--]; ^el:)$
b = temp[j]; Pk2"\y@q/
} Z)4P>{
} YZD]<ptR
} MkG->*
Jrl xa3 [
/** J#nEGl|a
* @param data $o^}<)DW
* @param l B-zt(HG
* @param i L1+cv;t
*/ pgi7 JQ
private void insertSort(int[] data, int start, int len) { pYQs|5d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sIM`Q%
} XRin~wz|S
} EaL+}/q&
} P0<uF`87
} *()#*0
)E|Bb=%
堆排序： h@8
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package org.rut.util.algorithm.support; .!! yj,bQz
sk/Mh8z
import org.rut.util.algorithm.SortUtil; bZJiubBRI
dD!SgK[Jv
/** N9Vcp~;
* @author treeroot A&#Bf#!G
* @since 2006-2-2 KcE=m\h
* @version 1.0 BC+qeocg
*/ ~A( Pa-
public class HeapSort implements SortUtil.Sort{ ^a r9$$~/!
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/* (non-Javadoc) Ja2.1v|r.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nwYeOa/t
*/ ,kI1"@Tu
public void sort(int[] data) { m-]"I8[
MaxHeap h=new MaxHeap(); x;/3_"$9>\
h.init(data); a!.8^:B&
for(int i=0;i h.remove(); /xnhHwJm
System.arraycopy(h.queue,1,data,0,data.length); 7Q&P4{hi0
} )LUl?
g;1 UZE;
private static class MaxHeap{ vF1$$7k
;!b(b%
void init(int[] data){ FeJ5^Gh.
this.queue=new int[data.length+1]; 9EW 7,m{A
for(int i=0;i queue[++size]=data; L M[<?`%p
fixUp(size); |,crQ'N'
} }W J`q`g
} Urr1K)
eX/$[SL[
private int size=0; UgJHSl
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private int[] queue; |ipppE=
_4w%U[GT,
public int get() { u-$AFSt
return queue[1]; +iR;D$w
} aJts
>#Yq&@G
public void remove() { Bf.RYLsh6
SortUtil.swap(queue,1,size--); xYq8\9Qb
fixDown(1); qYs6PLC
} 1zffPC8jl
file://fixdown c1f6RCu$b
private void fixDown(int k) { '_%Jw:4k
int j; 1Ppzch7
while ((j = k << 1) <= size) { K`sm
if (j < size %26amp;%26amp; queue[j] j++; 6Xa2A6
if (queue[k]>queue[j]) file://不用交换 uBXI*51{
break; b~p <
SortUtil.swap(queue,j,k); \$I )}
k = j; e# DAa
} gYZgo
} xHmc8G$zu
private void fixUp(int k) { DX|kO
while (k > 1) { cW2:D$Pe
int j = k >> 1; ,$Mw/fA
if (queue[j]>queue[k]) :d;5Q\C`
break; 2t'&7>Ys{
SortUtil.swap(queue,j,k); :>;#/<3{
k = j; <5 +?&i
} {>qCZ#E5WO
} i.]}ooI
&N#)(rQ1
} ! ^W|;bq
}`X$ '
} b]~M$y60q
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SortUtil： K|&y?w
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package org.rut.util.algorithm; UTz;Sw?~hw
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import org.rut.util.algorithm.support.BubbleSort; )]}*oO
import org.rut.util.algorithm.support.HeapSort; A,osrv
import org.rut.util.algorithm.support.ImprovedMergeSort; h(fh |R<
import org.rut.util.algorithm.support.ImprovedQuickSort; #KwFrlZ
import org.rut.util.algorithm.support.InsertSort; 9o6y7hEQy
import org.rut.util.algorithm.support.MergeSort; *e R$
import org.rut.util.algorithm.support.QuickSort; mMR[(
import org.rut.util.algorithm.support.SelectionSort; 9D@Ez"xv
import org.rut.util.algorithm.support.ShellSort; C<pF13*4
w?[)nlNW
/** T"z!S0I
* @author treeroot tPUQ"S
* @since 2006-2-2 qy!G&
* @version 1.0 l/]P6 @N
*/ Kfi A 7W
public class SortUtil { 9/{g%40B^
public final static int INSERT = 1; (- uk[["3
public final static int BUBBLE = 2; a36<S0R
public final static int SELECTION = 3; 9:Y\D.M
public final static int SHELL = 4; 5segzaI
public final static int QUICK = 5; )gR&Ms4
public final static int IMPROVED_QUICK = 6; $KiA~l
public final static int MERGE = 7; E-/]UH3u H
public final static int IMPROVED_MERGE = 8; ;RrfE8mGj
public final static int HEAP = 9; # a3Q<%V
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public static void sort(int[] data) { .C1^QY-wL
sort(data, IMPROVED_QUICK); F'K{=
} *6h.#$\
private static String[] name={ </fnbyGR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w-KtxG(
}; i|<*EXB"
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private static Sort[] impl=new Sort[]{ ?;$g,2n
new InsertSort(), YC$pT
new BubbleSort(), PU8R 0r2k\
new SelectionSort(), k";;Snk
new ShellSort(), dO=<3W
new QuickSort(), SSzOz-&GA
new ImprovedQuickSort(), 6@d( <Z
new MergeSort(), 9SrV,~zD
new ImprovedMergeSort(), TiOvrp7B
new HeapSort() O&)Y3O1
}; 33; ytd
Nb$)YMbA
public static String toString(int algorithm){ `1P &
return name[algorithm-1]; WN0^hDc-
} m?csake.Me
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public static void sort(int[] data, int algorithm) { GVg0)}
impl[algorithm-1].sort(data); a+X X?uN{
} a\zbi$S
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public static interface Sort { jQc0_F\
public void sort(int[] data); ?O_;{(F_
} H1X6f7`
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public static void swap(int[] data, int i, int j) { l-mUc1.S
int temp = data; q3;HfZ
data = data[j]; GUK/Xiu
data[j] = temp; {u:DC4eut
} hGpaHY>My
} v/kYyz