[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; L8<Yk`jx
} xrbDqA.b
int i1=l; [aM_.[bf
int i2=mid+1; VKtrSY}6T
for(int cur=l;cur<=r;cur++){ @Q:5{?
if(i1==mid+1) N2yxli
data[cur]=temp[i2++]; =Qt08,.bW
else if(i2>r) b .9]b
data[cur]=temp[i1++]; {I s?>m4
else if(temp[i1] data[cur]=temp[i1++]; v:s.V>{"S
else QcyYTg4i
data[cur]=temp[i2++]; Nrl&"IK|J
} S>~QuCMY
} /yHM=&Vg]
lQs|B '
} bP;cDQ(g
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改进后的归并排序: .lMIJN&/
zh5{t0E}C
package org.rut.util.algorithm.support; .e2qa
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import org.rut.util.algorithm.SortUtil; >S /Zd
&*TwEN^h
/** lf3:Z5*&>
* @author treeroot @;>TmLs
* @since 2006-2-2 uVoM2n?D%^
* @version 1.0 1x+YgL5
*/ :0BaEqX
public class ImprovedMergeSort implements SortUtil.Sort { 1Yt;1k'
(>m3WI$d
private static final int THRESHOLD = 10; -a`EL]NX
$KL5Z#K
/* 8" Z!: =A
* (non-Javadoc) xZ2}1D
* [3`T/Wm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]a|3"DP5
*/ V}732?Jy
public void sort(int[] data) { -Z&6PT7
int[] temp=new int[data.length]; #84pRU~
mergeSort(data,temp,0,data.length-1); t0Q/vp*/
} ~ei\~;n\@
Dx/!^L02
private void mergeSort(int[] data, int[] temp, int l, int r) { t?^C9(;6
int i, j, k; sMAc+9G9k
int mid = (l + r) / 2; htbN7B(
if (l == r) dbGW`_zQ4
return; }?B=R#5
if ((mid - l) >= THRESHOLD) X&._<2
mergeSort(data, temp, l, mid); %-@`|
else {t: ZMUV
insertSort(data, l, mid - l + 1); >b;fhdd:4
if ((r - mid) > THRESHOLD) E^S[8=
mergeSort(data, temp, mid + 1, r); jnFCtCB
else B\&;eZY'G
insertSort(data, mid + 1, r - mid); +r)'?zU
tBe)#-O
for (i = l; i <= mid; i++) { M-KjRl
temp = data; 8;7Y}c
} v#0R
for (j = 1; j <= r - mid; j++) { }fw;{&s{z
temp[r - j + 1] = data[j + mid]; ouKID_'
} HxJKS*H;
int a = temp[l]; P[PBoRd2
int b = temp[r]; >`DbT:/<
for (i = l, j = r, k = l; k <= r; k++) { JDVMq=ui
if (a < b) { Q[i/]
data[k] = temp[i++]; hd1H
a = temp; yvo~'k#c
} else { '01H8er
data[k] = temp[j--]; |i-Qfpn
b = temp[j]; Sv.z9@S
} :bMCmY
} XtfO;`
} 9&5\L
@YmD 79
/** ann!"s_
* @param data y'4H8M2?
* @param l Iw~3y{\
* @param i Y?hC/6$7
*/ p2|c8n==
private void insertSort(int[] data, int start, int len) { B?c9cS5Mj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); POTW+Zq]
} |E-0P=h
} NLM ]KT
} "Iu[)O%
} $DC*&hqpt
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堆排序： ")7,ZN;
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package org.rut.util.algorithm.support; sChMIbq!Av
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import org.rut.util.algorithm.SortUtil; aR.1&3fE
9"R]"v3BA
/** O!='U!X@P
* @author treeroot xbrxh-gV
* @since 2006-2-2 !_s|h@
* @version 1.0 &|P@$O>
*/ N]: "3?%
public class HeapSort implements SortUtil.Sort{ cs`/^2Vf"#
Y."ujo#bB
/* (non-Javadoc) %a+X\\v2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G5Y5_r6Gu
*/ o7VNw8Bp
public void sort(int[] data) { _lb ^
MaxHeap h=new MaxHeap(); ME~ga,|K
h.init(data); &V1N a1`
for(int i=0;i h.remove(); S{j|("W"[
System.arraycopy(h.queue,1,data,0,data.length); H V<|eL #
} Pgg6(O9}B^
c"t1E-Nsk
private static class MaxHeap{ 4vTO #F
~\/>b}^uf'
void init(int[] data){ 0CI?[R\
this.queue=new int[data.length+1]; I})la!9
for(int i=0;i queue[++size]=data; ?HVsIAU
fixUp(size); H[V^wyi'z
} hNc;,13
} i0,{*LD%^
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private int size=0; }GsZ)\!$4
-h*Yd)
private int[] queue; r9@O`i
gBHev1^y
public int get() { xBU\$ToC
return queue[1]; c&)H
} $G5m/[KDI
`|wH=
public void remove() { 0IBVR,q
SortUtil.swap(queue,1,size--); :gY$/1SYD
fixDown(1); ;6t>!2I>C
} PC/fb-J
file://fixdown KgVit+4u/
private void fixDown(int k) { "e g`3v
int j; %@$h?HP
while ((j = k << 1) <= size) { 8+ eZU<\B(
if (j < size %26amp;%26amp; queue[j] j++; i9k7rEW^
if (queue[k]>queue[j]) file://不用交换 y#HD1SZ
break; !^!<Xz;
SortUtil.swap(queue,j,k); MLY19;e
k = j; >1a-}>r
} Vj4 if@Z
} $/],QD_;"
private void fixUp(int k) { !798%T
while (k > 1) { p+;Re2Uyg
int j = k >> 1; fOJk+? c
if (queue[j]>queue[k]) Rp A76ug
break; Nv*x^y]
SortUtil.swap(queue,j,k); >OE.6)'Rm
k = j; [Z,AquCU(
} r\vB-nJ
} ,oIZ5u{#,
F^_d8=67h
} /V~L:0%
66D<Up'K
} wc)[r~On(5
*x`z5_yfO
SortUtil： FFbMG:>:
8_>\A= E
package org.rut.util.algorithm; :84ja>`c
cZ|D!1%
import org.rut.util.algorithm.support.BubbleSort; >?'q P ]
import org.rut.util.algorithm.support.HeapSort; zJI/j _~W
import org.rut.util.algorithm.support.ImprovedMergeSort; 5h1!E
import org.rut.util.algorithm.support.ImprovedQuickSort; C-qsyJgZy
import org.rut.util.algorithm.support.InsertSort; >tr?5iKxc
import org.rut.util.algorithm.support.MergeSort; "+_]N9%)
import org.rut.util.algorithm.support.QuickSort; YC&iH>jO3
import org.rut.util.algorithm.support.SelectionSort; yZK1bnYG|I
import org.rut.util.algorithm.support.ShellSort; N ED`GU
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/** ce2d)FG}e
* @author treeroot 10}oaL S
* @since 2006-2-2 PZNo.0M70
* @version 1.0 vbqI$F[s
*/ w?C_LP
public class SortUtil { )g:UH Ns
public final static int INSERT = 1; 98Srn63O
public final static int BUBBLE = 2; h|=^@F_\`
public final static int SELECTION = 3; HCHP15otfe
public final static int SHELL = 4; E}k#-+u<S4
public final static int QUICK = 5; x@DXW(
public final static int IMPROVED_QUICK = 6; eno*JK
public final static int MERGE = 7; M=yZ5~3
public final static int IMPROVED_MERGE = 8; $@x3<}X;
public final static int HEAP = 9; HhqqJEp0
#m$H'O[WG\
public static void sort(int[] data) { xje{kx#
sort(data, IMPROVED_QUICK); yLDHJ}R
} ,7j`5iq[m
private static String[] name={ cU{LyZp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +Og O<P
}; 20fCWVw}?}
=x7ODBYW^
private static Sort[] impl=new Sort[]{ Ev^Xs6 }"
new InsertSort(), ^k_!+8"q{
new BubbleSort(), k&~vVx
new SelectionSort(), ItRGq
new ShellSort(), UoLO#C0i
new QuickSort(), #e|eWi>
new ImprovedQuickSort(), ~(Tz <
new MergeSort(), Q1jyetk~I
new ImprovedMergeSort(), s]I],>}RU
new HeapSort() 3R{-\ZMd
}; ;zCHEz
>|iy= Zn%'
public static String toString(int algorithm){ ^-ACtA)
return name[algorithm-1]; #zy%B
} 0)P18n"$
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public static void sort(int[] data, int algorithm) { "|Pl(HX
impl[algorithm-1].sort(data); 7 dzE"m
} roA1=G\Q
.( J/*H
public static interface Sort { a(7ryl~c=
public void sort(int[] data); xC{NIOYn'
} ~3%3{aa
y8 Nb8m
public static void swap(int[] data, int i, int j) { L!p|RKz9X
int temp = data; s +GF-kJ*
data = data[j]; joA+
data[j] = temp; }ot _k-
} O`u!P\
} bPOx~ CMh