[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; p;#@#>h
} \ @XvEx%
int i1=l; vndD#/lXq
int i2=mid+1; 'uy\vR&Pz
for(int cur=l;cur<=r;cur++){ ?2d! ^!9
if(i1==mid+1) Z`jc*jgy
data[cur]=temp[i2++]; $2!|e,x
else if(i2>r) ;t6)(d4z?
data[cur]=temp[i1++]; *vFXe_.
else if(temp[i1] data[cur]=temp[i1++]; B\WIoz;'
else \%],pZsA~
data[cur]=temp[i2++]; tW$Di*h
} dWKjVf
} wE*o1.
9NXL8QmC8
} 2TQyQ%
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改进后的归并排序: YCBp]xuE
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package org.rut.util.algorithm.support; !H)Cua)
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import org.rut.util.algorithm.SortUtil; h7?uM^p
p.%lE!v
/** "W71#n+[
* @author treeroot le7!:4/8
* @since 2006-2-2 !+R_Z#gB
* @version 1.0 T:<mme3v
*/ ][D/=-
public class ImprovedMergeSort implements SortUtil.Sort { V^S` d8?
G q&[T:
private static final int THRESHOLD = 10; )t?_3'W
w'i8yl bZ
/* {OIktG2gZ
* (non-Javadoc) {tKi8O^Rb
* rjaG{ i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OYYk[r
*/ Zqi;by%
public void sort(int[] data) { K^6fg,&
int[] temp=new int[data.length]; r &.gOC
mergeSort(data,temp,0,data.length-1); ]K<mkUpY
} Xi 8rD"v
=6YffXa_s
private void mergeSort(int[] data, int[] temp, int l, int r) { w *Txc}
int i, j, k; a_V.mu6h6p
int mid = (l + r) / 2; BN]{o(EB
if (l == r) 7 'B9z/
return; W)LtnD2 w
if ((mid - l) >= THRESHOLD) (R{|*:KP
mergeSort(data, temp, l, mid); ]r&dWF
else paYvYK-K?
insertSort(data, l, mid - l + 1); 5f}GV0=n
if ((r - mid) > THRESHOLD) |V dr/'
mergeSort(data, temp, mid + 1, r); GZx?vSoHh
else h\<;N*Xi
insertSort(data, mid + 1, r - mid); [&MhAzF
hLo'q^mGr
for (i = l; i <= mid; i++) { B[IqLD'6
temp = data; Z*Lv!6WS
} TBU.%3dEyI
for (j = 1; j <= r - mid; j++) { 1RU+d.&D
temp[r - j + 1] = data[j + mid]; $`'%1;y@
} b%_[\((
int a = temp[l]; )4O* D92
int b = temp[r]; u^X,ASkQ
for (i = l, j = r, k = l; k <= r; k++) { 3:B4;
if (a < b) { \L]T|]}(
data[k] = temp[i++]; kN8?.V%Utw
a = temp; _ry7[/)
} else { &60#y4
data[k] = temp[j--]; .>^iU}
b = temp[j]; cERmCe|/CG
} WoSJp5By$
} iS#m{1m$$
} {0J (=\u
\f-HfYG
/** /9k}Ip
* @param data Q<UKR|6
* @param l ) mG
* @param i Xxmvg.Nl
*/ OE8H |?%
private void insertSort(int[] data, int start, int len) { F7N4qq1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -guVl4 V
} Z5[f
} %:=Jr#a
} S!{Kn ;@
} l ]CnLqf&
2nv-/%]
堆排序： #Py\'
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package org.rut.util.algorithm.support; iTpK:pX
s]@k,%
import org.rut.util.algorithm.SortUtil; <uL0M`u3
R)u ${
/** >=!$(JgX
* @author treeroot bA*T1Db,t>
* @since 2006-2-2 O ]Stf7]%;
* @version 1.0 zrazFI0G
*/ ,].S~6IM
public class HeapSort implements SortUtil.Sort{ M\w%c5
:978D0}{p
/* (non-Javadoc) 6~y7A<[^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (Gp|K6
*/ KGq4tlM6
public void sort(int[] data) { *s}j:fJ
MaxHeap h=new MaxHeap(); $P7G,0-
h.init(data); H>Ws)aCq
for(int i=0;i h.remove(); ]>'yt #]
System.arraycopy(h.queue,1,data,0,data.length); 3!<} -sW4
} B_uAa5'
]Yd7
private static class MaxHeap{ d*(wU>J '
%n<.)R
void init(int[] data){ ,Y_[+
this.queue=new int[data.length+1]; ypA)G/;
for(int i=0;i queue[++size]=data; (g 9G!I
fixUp(size); /&Vgo~.J
} a"|\n_
} O:86*
U<Z\jT[
private int size=0; HZ.Jc"+M
V9r58hbVT
private int[] queue; ?ybX&V
MI<XLn!*
public int get() { `h+1u`FJ
return queue[1]; u,Rhm-`
} Vo-]&u&cr
4}t&AW4
public void remove() { i<]Y0_?s
SortUtil.swap(queue,1,size--); #&jr9RB
fixDown(1); 9'S~zG%{
} r")zR,
file://fixdown 2xJT!lN
private void fixDown(int k) { ~!G&K`u
int j; $h|rd+},
while ((j = k << 1) <= size) { xB&6f")
if (j < size %26amp;%26amp; queue[j] j++; .wv!;
if (queue[k]>queue[j]) file://不用交换 va_TC!{;
break; W2([vRT
SortUtil.swap(queue,j,k); ok+-#~VTn
k = j; avI
} QW_QizR>|
} *E-VS= #
private void fixUp(int k) { K`d3p{M
while (k > 1) { :.,3Zw{l
int j = k >> 1; 3ZKaqwK
if (queue[j]>queue[k]) U~Ai'1?xz
break; $={WtR
SortUtil.swap(queue,j,k); [va7+=[1=
k = j; 9v2(cpZ
} [Y^1}E*
} <fLk\ =
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} 6qgII~F'
^-'t`mRl]d
} l8_TeO
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SortUtil： 1q[vNP=g&
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package org.rut.util.algorithm; :i24@V~){
|UO&18Y7-
import org.rut.util.algorithm.support.BubbleSort; h c9?z}
import org.rut.util.algorithm.support.HeapSort; .+"SDtoX
import org.rut.util.algorithm.support.ImprovedMergeSort; T'TxC)
import org.rut.util.algorithm.support.ImprovedQuickSort; s`$px2Gw
import org.rut.util.algorithm.support.InsertSort; ^9Je8 @Yu
import org.rut.util.algorithm.support.MergeSort; "[LSDE"(
import org.rut.util.algorithm.support.QuickSort; VC6S4FU4K
import org.rut.util.algorithm.support.SelectionSort; @$(/6]4p
import org.rut.util.algorithm.support.ShellSort; tR]1c
# Y*cLN`Y7
/** jSj (ZU6
* @author treeroot }Pj3O~z
* @since 2006-2-2 1jhGshhp
* @version 1.0 1K;i/
*/ zFtwAa=r
public class SortUtil { X[cSmkp7
public final static int INSERT = 1; gl4|D
public final static int BUBBLE = 2; Q3vWwP;t~
public final static int SELECTION = 3; zDk^^'
public final static int SHELL = 4; v$`AN4)}
public final static int QUICK = 5; W,^(FR.
public final static int IMPROVED_QUICK = 6; :_qgpE<
public final static int MERGE = 7; >Tm|}\qEb
public final static int IMPROVED_MERGE = 8; zJfoU*G/B
public final static int HEAP = 9; L|3wGY9E
lj1wTiaI(
public static void sort(int[] data) { h|!F'F{
sort(data, IMPROVED_QUICK); n+EK}=DK
} ?CQ\94kO
private static String[] name={ E!4Qc+.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q1Jkt
}; 4^KoHeM6
rX%qWhiEJ
private static Sort[] impl=new Sort[]{ j;O{Hvvz
new InsertSort(), V^t5 Y+7
new BubbleSort(), s1!_zf_
new SelectionSort(), @ P=eu3
new ShellSort(), jaAv_=93f
new QuickSort(), U/B1/96lJ
new ImprovedQuickSort(), $rySz7NI
new MergeSort(), ^;2dZgJ4^
new ImprovedMergeSort(), <N%8"o
new HeapSort() FRicHs n
}; fWR]L47n
U=C8gVb{Hq
public static String toString(int algorithm){ "Q~6cH[#
return name[algorithm-1]; fNi&1J-/
} Hy<4q^3$G
><X!~by
public static void sort(int[] data, int algorithm) { dm Lgt)-t
impl[algorithm-1].sort(data); >8V;:(nt
} .,K?(O4AY
d0b--v/
public static interface Sort { 2O|o%`?
public void sort(int[] data); FxKb
} DlR&Lnv
6qK0G$>
public static void swap(int[] data, int i, int j) { =*q:R9V
int temp = data; eB:obz
data = data[j]; -K`0`n}
data[j] = temp; .~a)
} %8kbX
} Y"mD)\Bw?