[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; >l7 o/*4
} M,{F/Yu
int i1=l; :g\qj? o
int i2=mid+1; 9c?izpA
for(int cur=l;cur<=r;cur++){ lW2qVR
if(i1==mid+1) odhgIl&u
data[cur]=temp[i2++]; 3NJH"amk
else if(i2>r) 5&xvY.!27V
data[cur]=temp[i1++]; 7u}r^+6_o
else if(temp[i1] data[cur]=temp[i1++]; q6DhypB
else onmO>q*
data[cur]=temp[i2++]; Aqc(
} P&SR;{:y
} Uexb>|
uL= \t=
} jjbw.n+1
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改进后的归并排序: i4-L!<bJ
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package org.rut.util.algorithm.support; p75w^
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import org.rut.util.algorithm.SortUtil; Q{a!D0;4v
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/** 8q0 .yhb
* @author treeroot k+i=0P0mf
* @since 2006-2-2 mPh;
* @version 1.0 LnL<WI*Pq
*/ kjmF-\
public class ImprovedMergeSort implements SortUtil.Sort { q'@UZ$2
9o18VJR
private static final int THRESHOLD = 10; V{*9fB#4L
_1hqD EM
/* Q2 edS|
* (non-Javadoc) -yAIrvO1q
* W"0#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _Yhpj}KZ
*/ un\^Wmbw
public void sort(int[] data) { fXqe7[
int[] temp=new int[data.length]; 61KJ( rSX3
mergeSort(data,temp,0,data.length-1); }1>a71
} yQW\0&a$
&]M<G)9
private void mergeSort(int[] data, int[] temp, int l, int r) { A<Na,EC
int i, j, k; z/ i3
int mid = (l + r) / 2; ,=ICSS~9l
if (l == r) Vz#cb5:g
return; V&>7i9lEz
if ((mid - l) >= THRESHOLD) y^XwJX-f
mergeSort(data, temp, l, mid); -cW5v
else }I;W
insertSort(data, l, mid - l + 1); vrbS-Z<S9
if ((r - mid) > THRESHOLD) [ wROIvV
mergeSort(data, temp, mid + 1, r); $M8'm1R9
else B}jZ~/D}
insertSort(data, mid + 1, r - mid); O{4m-;
;js7rt
for (i = l; i <= mid; i++) { }6KL
temp = data; 6xOR,p>E
} `?$R_uFh:
for (j = 1; j <= r - mid; j++) { J?]W!V7C
temp[r - j + 1] = data[j + mid]; 1zM`g_(#
} t (1z+
int a = temp[l]; (PNvv/A
int b = temp[r]; I;`V*/s8"
for (i = l, j = r, k = l; k <= r; k++) { #"Zr#P{P
if (a < b) { l(`w]=t&
data[k] = temp[i++]; bT;C8i4b\H
a = temp; g&za/F
} else { ;aF / <r
data[k] = temp[j--]; ,aN/``j=
b = temp[j]; S*]IR"YL
} J3'"-,Hv
} QVP $e`4
} CeZ5Ti?F
QA%GK4F70
/** |9Y9pked8
* @param data 0Icyi#N
* @param l >Kr,(8rA
* @param i z(m*]kpL"
*/ vSX 6~m
private void insertSort(int[] data, int start, int len) { D"o>\Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n% *u;iG
} gC3{:MC-G
} wb{y]~&6K
} *n*OVI8L
} w&H ?;1
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堆排序： REt()$ 7~
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package org.rut.util.algorithm.support; Mz06cw&
-r,J>2`l
import org.rut.util.algorithm.SortUtil; \\'!<Bn2d
^GbyAYEp
/** HU'd/5fun
* @author treeroot +<iw|vr
* @since 2006-2-2 hcBfau;r
* @version 1.0 0VbZBLe
*/ qvt~wJf<
public class HeapSort implements SortUtil.Sort{ #mj+|/0
:4WwCpgz,
/* (non-Javadoc) Y3-P*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x,>=X`T
*/ ="u(o(j"
public void sort(int[] data) { uM\~*@
MaxHeap h=new MaxHeap(); 1xx-}AIH#
h.init(data); hA"N&v~
for(int i=0;i h.remove(); tVe*J@i\$
System.arraycopy(h.queue,1,data,0,data.length); ,:#prT[P"
} "NJ!A
F;z FKvn
private static class MaxHeap{ D~1nh%x_
;Y~;G7
void init(int[] data){ 2D-*Z=5^
this.queue=new int[data.length+1]; 0]WM:6 h
for(int i=0;i queue[++size]=data; R#r?<Ofw4
fixUp(size); /,;9hx
} G,XFS8{%
} B!Qdf8We
*</;:?
private int size=0; w,l1&=d
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private int[] queue; xLGAP-mx]
P#yS]F/
public int get() { G U!XD!!&
return queue[1]; +J^}"dG
} }FFW,x
Vb1@JC9b
public void remove() { 2=#O4k.@
SortUtil.swap(queue,1,size--); 8en85 pp8P
fixDown(1); b'ew Od=
} xF,J[Aj
file://fixdown C ]#R7G
private void fixDown(int k) { ];< [Cln%
int j; E7*]t_p"
while ((j = k << 1) <= size) { yEz2F3[ S
if (j < size %26amp;%26amp; queue[j] j++; e%qMrR
if (queue[k]>queue[j]) file://不用交换 doe[f_\
break; bg$e80
SortUtil.swap(queue,j,k); ^&,{
k = j; XjX<?W
} `j<'*v zo
} ?5->F/f&
private void fixUp(int k) { )ei+ewVZ
while (k > 1) { 9(H8MUF0{
int j = k >> 1; H\ NO4=
if (queue[j]>queue[k]) Kj-`ru
break; MjLyB^M
SortUtil.swap(queue,j,k); ?! kup
k = j; ly{~X
} .AV--oA~
} Tn-H8;Hg
3FS:]|oC
} ha(hG3C
!867DX3*
} @@I2bHyvb
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SortUtil： 1dKLNE
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package org.rut.util.algorithm; J"SAA0)@
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import org.rut.util.algorithm.support.BubbleSort; BgE]xm
import org.rut.util.algorithm.support.HeapSort; K&S~IFy
import org.rut.util.algorithm.support.ImprovedMergeSort; u{\`*dNx
import org.rut.util.algorithm.support.ImprovedQuickSort; S4tdWA
import org.rut.util.algorithm.support.InsertSort; zKI(yC
import org.rut.util.algorithm.support.MergeSort; F 6SIhf.;
import org.rut.util.algorithm.support.QuickSort; 'T.> oP0>
import org.rut.util.algorithm.support.SelectionSort; kDm=Cjxv
import org.rut.util.algorithm.support.ShellSort; z~X]v["d
K7y}R%QF
/** a#mdD:,cF
* @author treeroot $+rdzsf)+/
* @since 2006-2-2 FS']3uJ/
* @version 1.0 ,@2O_O`:
*/ 2 OGg`1XX
public class SortUtil { '9b<r7\@
public final static int INSERT = 1; 3nG(z>
public final static int BUBBLE = 2; QXF>xZ~
public final static int SELECTION = 3; N($j;<Q
public final static int SHELL = 4; qC]D9 A
public final static int QUICK = 5; %u!#f<"[
public final static int IMPROVED_QUICK = 6; OtnYv
public final static int MERGE = 7; ]P 2M
public final static int IMPROVED_MERGE = 8; (apAUIE
public final static int HEAP = 9; uT=sDWD:
2Yyc`o0R;h
public static void sort(int[] data) { W<58TCd
sort(data, IMPROVED_QUICK); NW~n+uk5v
} dLo%+V#/A
private static String[] name={ ] e&"CF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .kBAUkL:
}; 8^HMK$
P+]39p{
private static Sort[] impl=new Sort[]{ #%x4^A9 q
new InsertSort(), 6C
new BubbleSort(), 3L#KHTM
new SelectionSort(), RJGf@am&
new ShellSort(), n RXf\*"3
new QuickSort(), kH{axMNc
new ImprovedQuickSort(), _:TD{EO$
new MergeSort(), BI}>"',
new ImprovedMergeSort(), zf^!Zqn[8z
new HeapSort() !iZ*ZPu
}; G*n5`N@>7
9WHkw@<R+
public static String toString(int algorithm){ &&tQ,5H5
return name[algorithm-1]; R*QL6t
} C YnBZ
r{Xh]U&>k
public static void sort(int[] data, int algorithm) { /LJ?JwAvg5
impl[algorithm-1].sort(data); bk"` hq
} -BB5bsjA
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public static interface Sort { hNP|
public void sort(int[] data); ,Kdvt@vle
} K34y3i_
bu\,2t}B
public static void swap(int[] data, int i, int j) { l%;)0gT
int temp = data; -V<i4X<|,+
data = data[j]; Inr ~9hz
data[j] = temp; v6iV#yz3(
} D<nTo&m_
} >j\zj] -"