[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; |]*3En:
} R2Fjv@Egk
int i1=l; h<LFTYE@
int i2=mid+1; E7MSoBX9M
for(int cur=l;cur<=r;cur++){ ",$_\l
if(i1==mid+1) f_jhQ..g<g
data[cur]=temp[i2++]; AzOs/q8O
else if(i2>r) A#=TR_@:
data[cur]=temp[i1++]; ! ;t\lgMl
else if(temp[i1] data[cur]=temp[i1++]; 2]5{Xmmo9
else wu)+n\mt'
data[cur]=temp[i2++]; EsMX#1>/m
} lhGJ/By- -
} sCFxn
i3,IEN
} Mqr_w!8d
3T2]V?
改进后的归并排序: e|\xFV=4
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package org.rut.util.algorithm.support; Wb-C0^dTn
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import org.rut.util.algorithm.SortUtil; y QW7ng7D0
\l~^dn}
/** RRIh;HhX
* @author treeroot |vI`u[P
* @since 2006-2-2 SeD}H=,@
* @version 1.0 -&5YRfr!
*/ aTuu",f
public class ImprovedMergeSort implements SortUtil.Sort { -fq
K($l>PB,y@
private static final int THRESHOLD = 10; cq4~(PXTg
K oJ=0jM#
/* 5qb93E"C
* (non-Javadoc) {]T?)!Vm
* @Vre)OrN#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0<uek
*/ Ek_5% n
public void sort(int[] data) { y7,I10:D
int[] temp=new int[data.length]; }5;4'l8
mergeSort(data,temp,0,data.length-1); >rCD5#DG
} {o}U"b<+Ra
p0Jr{hM
private void mergeSort(int[] data, int[] temp, int l, int r) { .<"XE7
int i, j, k; bv[#|^/
int mid = (l + r) / 2; 8s1nE_3
if (l == r) vYed_'_
return; !D#"+&&G8
if ((mid - l) >= THRESHOLD) hmu>s'
mergeSort(data, temp, l, mid); 7Y5r3a}%
else &lQ%;)'
insertSort(data, l, mid - l + 1); 'ToE Y3
if ((r - mid) > THRESHOLD) y[8;mCh
mergeSort(data, temp, mid + 1, r); D'g,<-ahl
else NKu[6J?)
insertSort(data, mid + 1, r - mid); ?=? _32O
$DL}jH^S
for (i = l; i <= mid; i++) { q[&Kr+)j
temp = data; _K^Q]V[nZ
} 0bTj/0G?
for (j = 1; j <= r - mid; j++) { TN(Vzs%
temp[r - j + 1] = data[j + mid]; $UR:j8C{p$
} ^_WR) F'K
int a = temp[l]; LR97FG
int b = temp[r]; e4S@ J/D
for (i = l, j = r, k = l; k <= r; k++) { @Rr=uf G
if (a < b) { 0:$}~T9T
data[k] = temp[i++]; uJw?5kEbv<
a = temp; lPy|>&Yc
} else { uX_H;,n
data[k] = temp[j--]; o(*\MTt?
b = temp[j]; `6Bx8CZ'I
} x4MmBVqp
} 5h5izA'0'
} v e&d"8+]
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/** uvId],dQ5
* @param data A)f-r
* @param l YuK+N
* @param i [G<ga80
*/ yw^Pok5.
private void insertSort(int[] data, int start, int len) { n1sYD6u<&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pbH!u+DF
} jIol`WX
} Cj-s
} 7Ak<e tHD
} 3s6obw$ki
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堆排序： Aa ~W,
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package org.rut.util.algorithm.support; #T=iS(i
r48|C{je-
import org.rut.util.algorithm.SortUtil; f3K-X1`]'U
7(Fas(j3
/** 586P~C[ic
* @author treeroot >8f~2dH2%
* @since 2006-2-2 Ku(YTXtK
* @version 1.0 h^Wb<O`S
*/ zI`I Q
public class HeapSort implements SortUtil.Sort{ [:8\F#KW
vV,TT%J8D
/* (non-Javadoc) y]db]pP5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FZ"n6hWA
*/ ZQ`8RF *v
public void sort(int[] data) { :u>RyKu|&R
MaxHeap h=new MaxHeap(); =:H-9
h.init(data); $vs],C"pX
for(int i=0;i h.remove(); Fs/CW\
System.arraycopy(h.queue,1,data,0,data.length); CTIS}_CWd=
} I,-n[k\J
[l}H:%O,
private static class MaxHeap{ Hjm> I'9
c]6b|mHT
void init(int[] data){ 6S`_L
this.queue=new int[data.length+1]; Q((&Q?Vi
for(int i=0;i queue[++size]=data; %*D=ni#(sT
fixUp(size); Qit&cnO
} `16'qc
} 1j?P$%p
Y~"tL(WfJl
private int size=0; gIB3DuUo
P5Xp #pa
private int[] queue; $qNF /rF
IiPX`V>RC
public int get() { [\8rh^LFi
return queue[1]; VGS%U8;
} @6;OF5VsQ
`<7\Zl
public void remove() { $$9H1)Ny
SortUtil.swap(queue,1,size--); [JOa^U=
fixDown(1); yGa0/o18!?
} #(^<qr
file://fixdown |AYii-g
private void fixDown(int k) { A8% e_XA
int j; <.h7xZ
while ((j = k << 1) <= size) { WVP?Ie8
if (j < size %26amp;%26amp; queue[j] j++; "N+4TfXy
if (queue[k]>queue[j]) file://不用交换 s)-An(Uw
break; 7-744wV}Z
SortUtil.swap(queue,j,k); (\6E.Z#
k = j; K9N31'
} _^iY;&
} *!QmYH5r0
private void fixUp(int k) { Z(MZbzY7Hq
while (k > 1) { CFpBosoFt^
int j = k >> 1; j.=:S;
if (queue[j]>queue[k]) 9Yt|Wj
break; '2lV(>"
SortUtil.swap(queue,j,k); H:.~! r
k = j; iw)gNQ%z4
} 2S8;=x}/
} <cTX;&0=
[jgVN w""D
} hK?GIbRZ
"r^RfZ;
} a%%7Ew ?
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SortUtil： g QBS#NY
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package org.rut.util.algorithm; dz^HN`AlzC
}qWnn>h9xv
import org.rut.util.algorithm.support.BubbleSort; KI9Pw]]{-
import org.rut.util.algorithm.support.HeapSort; 9PB%v.t5y
import org.rut.util.algorithm.support.ImprovedMergeSort; 9vRLM*9|
import org.rut.util.algorithm.support.ImprovedQuickSort; t0e6iof^o
import org.rut.util.algorithm.support.InsertSort; VY6G{f
import org.rut.util.algorithm.support.MergeSort; &M|rRd~*
import org.rut.util.algorithm.support.QuickSort; /stvNIEa
import org.rut.util.algorithm.support.SelectionSort; 8a6.77c
import org.rut.util.algorithm.support.ShellSort; }?2X q
\(Ma>E4PNU
/** @X/ 1`Mp
* @author treeroot @qNY"c%HV
* @since 2006-2-2 3@~a)E}T
* @version 1.0 ilL%
*/ bF _]j/
public class SortUtil { ^Gk)aX
public final static int INSERT = 1; F_079~bJ
public final static int BUBBLE = 2; =z. hJu
public final static int SELECTION = 3; aE0R{yupZ
public final static int SHELL = 4; m* 3ipI{h
public final static int QUICK = 5; ?dJd7+A
public final static int IMPROVED_QUICK = 6; %bw+>:Tr
public final static int MERGE = 7; [{Wo:c9Qq1
public final static int IMPROVED_MERGE = 8; 6FDj:~
public final static int HEAP = 9; "](Q2
wR_mJMk_
public static void sort(int[] data) { <zXG}JuL@T
sort(data, IMPROVED_QUICK); / &Z8g4vc
} "L.k m
private static String[] name={ P%R!\i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?s,oH
}; @|A!?}
Sh#N5kgD
private static Sort[] impl=new Sort[]{ 1uw1(iL+
new InsertSort(), .=:f]fs
new BubbleSort(), W3~u J(
new SelectionSort(), cW^LmA
new ShellSort(), ^_#wo"
new QuickSort(), YeCnk:_ kg
new ImprovedQuickSort(), / =9Y(v
new MergeSort(), X3sAy(q
new ImprovedMergeSort(), (Z<@dkO?)
new HeapSort() |&K;*g|a
}; y A5h^I
lITd{E,+r
public static String toString(int algorithm){ 82FEl~,^E
return name[algorithm-1]; 3w^W6hN)
} QPm[4Fd{G
(rFkXK4^J
public static void sort(int[] data, int algorithm) { faOiNR7;h
impl[algorithm-1].sort(data); dEYw_qJ2
} O.jm{x!m
YT-ua{.^
public static interface Sort { ;MeY@*"{
public void sort(int[] data); g#(+:^3'
} '/`O*KD]
@vq)Y2)r\
public static void swap(int[] data, int i, int j) { T;DKDga
int temp = data; XW aa`q
data = data[j]; B-g-T>8
data[j] = temp; Xc[ym
} #pZeGI|'J
} OcUj_Zd