[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; wDSU~\
} ;aFQP:l/
int i1=l; pFG~XW
int i2=mid+1; BS{">lPmx
for(int cur=l;cur<=r;cur++){ 8.A; I<
if(i1==mid+1) -'I)2/%g
data[cur]=temp[i2++]; ,*bxNs'/
else if(i2>r) $4eogI7N>w
data[cur]=temp[i1++]; u{_T,k<!
else if(temp[i1] data[cur]=temp[i1++]; iE&`Fhf?
else C( r?1ma
data[cur]=temp[i2++]; *X)OdU
} K1C#
} 2[:`w),.
z24-hC
} g:*yjj
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改进后的归并排序: 9:esj{X
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package org.rut.util.algorithm.support; +V0uHpm
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import org.rut.util.algorithm.SortUtil; Uh7kB`2
7sFjO/a*
/** sDwSEg>#B
* @author treeroot bZKK'd$I
* @since 2006-2-2 Q"(i
* @version 1.0 }2{%V^D)r
*/ 1ITa6vjS
public class ImprovedMergeSort implements SortUtil.Sort { yqAw7GaBN
gFW1Nm_DJ
private static final int THRESHOLD = 10; %RJW@~!
#q=?Zu^Da
/* LUCpZ3F1
* (non-Javadoc) %f^TZ,q$
* |M+ !O93
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *W0`+#Dcv
*/ xo]|m\#k5E
public void sort(int[] data) { u'iOa
int[] temp=new int[data.length]; <7)@Jds\
mergeSort(data,temp,0,data.length-1); 5jbd!t@L
} gE%-Pf~
8S)k]$wf%
private void mergeSort(int[] data, int[] temp, int l, int r) { qUVV374N
int i, j, k; g#H#i~E^
int mid = (l + r) / 2; K.1#cf ^'
if (l == r) Qg4qjX](?
return; 0chBw~@*s
if ((mid - l) >= THRESHOLD) \=nY&Ml
mergeSort(data, temp, l, mid); iJ#sg+
else F+}MW/ra@
insertSort(data, l, mid - l + 1); *O+N4tq
if ((r - mid) > THRESHOLD) G<>`O;i
mergeSort(data, temp, mid + 1, r); o^lKM?t
else 2N>:GwN
insertSort(data, mid + 1, r - mid); <<[`;"CF
p6>3 p
for (i = l; i <= mid; i++) { eH75:`
temp = data; &a7KdGP8V
} $Y>LUZ)b&8
for (j = 1; j <= r - mid; j++) { S3.Pqp_<
temp[r - j + 1] = data[j + mid]; yfi.<G)S
} <@JK;qm>S
int a = temp[l]; #Z8<H
int b = temp[r]; 5{j1<4zxR
for (i = l, j = r, k = l; k <= r; k++) { R5|c4v{B
if (a < b) { <r_ldkZ
data[k] = temp[i++]; vrQ/Yf:\B
a = temp; N^:)U"9*e
} else { \V}?K0#bt
data[k] = temp[j--]; BgUf:PT
b = temp[j]; +Z/Pj_.o
} >u~ l_?
} ^ WidA-
} ]B\H
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/** c]#F^(-A`
* @param data _6xC4@~h*
* @param l -NHc~=m
* @param i \za 0?b
*/ <mi*AY
private void insertSort(int[] data, int start, int len) { \"|E8A6/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6|~N5E~SX
} Z!v)zH\
} 4ZSc'9e9
} &O7]e3Ej
} L;wzvz\+
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堆排序： w<*6pPy
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package org.rut.util.algorithm.support; fH}#.vy
r[ni{&
import org.rut.util.algorithm.SortUtil; STtjkZ6
M4~^tML>Ey
/** f#FAi3
* @author treeroot Xy5#wDRC
* @since 2006-2-2 _H}8eU
* @version 1.0 4l_!OUvt
*/ xU6)~ae`JW
public class HeapSort implements SortUtil.Sort{ : M=0o<
4,4S5u[|
/* (non-Javadoc) ckykRqk}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :2ILN.&
*/ z10J8Ms'
public void sort(int[] data) { J2W#vFe\
MaxHeap h=new MaxHeap(); {DlQTgP
h.init(data); `n)e] dn
for(int i=0;i h.remove(); `#Z=cq^_
System.arraycopy(h.queue,1,data,0,data.length); <A@}C+
} A6eIf
rvfS[@>v
private static class MaxHeap{ YS],o'T
/u?ZwoTzY
void init(int[] data){ 1u>[0<U~E
this.queue=new int[data.length+1]; @$mh0K>
for(int i=0;i queue[++size]=data; \USl9*E
fixUp(size); B6UTooj
} 2zE gAc
} tx`gXtO$
6Uh_&?\%
private int size=0; _Fe%Ek1Yy
Z#uxa
private int[] queue; IE]? WW5
g A+p^`;[
public int get() { ERTjY%A
return queue[1]; q8 &\;GK|
} T&'p5h=l
=Vie0TV&h
public void remove() { @3*S:;x
SortUtil.swap(queue,1,size--); tW-wO[2
fixDown(1); pgUp1goAU
} >uLWfk+y1
file://fixdown 80_}}op?8
private void fixDown(int k) { ?*AhGza/
int j; #M ;j*IBl*
while ((j = k << 1) <= size) { v]h^0WU
if (j < size %26amp;%26amp; queue[j] j++; V |cPAT%
if (queue[k]>queue[j]) file://不用交换 9z#z9|hj)3
break; _~Id~b
SortUtil.swap(queue,j,k); RoFoEp
k = j; /Z|K9a
} S\M+*:7
} |1%eo.
private void fixUp(int k) { EQ [K
while (k > 1) { :lU#Dm]
int j = k >> 1; _s18^7
if (queue[j]>queue[k]) u u$Jwn!S
break; A1Es>NK[qW
SortUtil.swap(queue,j,k); =JaxT90x
k = j; Nr"gj$v
} y$8S+N?>
} {%Rntb
z!G?T(SpA
} f = 'AI
k 1lK`p
} sK@]|9ciQ
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SortUtil： Hb3..o:
9fy[%M
package org.rut.util.algorithm; ;$vVYC
f"-3'kqo
import org.rut.util.algorithm.support.BubbleSort; 3Yf~5csY
import org.rut.util.algorithm.support.HeapSort; 9K>~9Za
import org.rut.util.algorithm.support.ImprovedMergeSort; 4(? Z1S
import org.rut.util.algorithm.support.ImprovedQuickSort; =F% <W7
import org.rut.util.algorithm.support.InsertSort; B{K_?ae!
import org.rut.util.algorithm.support.MergeSort; eIj2(q9
import org.rut.util.algorithm.support.QuickSort; X`C ozyYuD
import org.rut.util.algorithm.support.SelectionSort; *|OUd7P:hU
import org.rut.util.algorithm.support.ShellSort; T"DG$R,Aj
"^)$MAZ
/** siOyp]
* @author treeroot W'PW;.,
* @since 2006-2-2 uHuL9Q^
* @version 1.0 1()pKBHf
*/ Y,m=&U
public class SortUtil { 4D[(X=FSU
public final static int INSERT = 1; A |P wm`
public final static int BUBBLE = 2; \0;EHB
public final static int SELECTION = 3; [5PQrf~Mo
public final static int SHELL = 4; =%S*h)}@
public final static int QUICK = 5; =)f.Yf|A*
public final static int IMPROVED_QUICK = 6; jA3xDbM
public final static int MERGE = 7; w&Z.rB?
public final static int IMPROVED_MERGE = 8; F6ZL{2$k@
public final static int HEAP = 9; "`V:4uz
S" PJ@E}^E
public static void sort(int[] data) { {>d\
sort(data, IMPROVED_QUICK); MFz6y":~
} V8G.KA "
private static String[] name={ C_ W%]8u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l]L"Ex{
}; :Vrj[i-{
"d*-k R
private static Sort[] impl=new Sort[]{ +vYVx<uTQ
new InsertSort(), ${tBu#$-d
new BubbleSort(), {tuGkRY2~
new SelectionSort(), acI%fYw5p`
new ShellSort(), '/fueku
new QuickSort(), ]YUst]gu3
new ImprovedQuickSort(), J@IF='{
new MergeSort(), #U6~U6@
new ImprovedMergeSort(), iwfH~
new HeapSort() [ z{}?
}; ~V/?/J$
r#c+{yY
public static String toString(int algorithm){ s-S|#5
return name[algorithm-1]; oYX#VX
} Cp]q>lM"
:&m0eZZ%
public static void sort(int[] data, int algorithm) { qbo W<W<H1
impl[algorithm-1].sort(data); Px`z$~*B:
} Gu%}B@4^
b|U3\Fmc
public static interface Sort { mam(h{f$
public void sort(int[] data); 41o~5:&
} ~GjM:*
ZRYHsl{F+
public static void swap(int[] data, int i, int j) { (oB9$Zz!t
int temp = data; ^S^7u
data = data[j]; ig?Tj4kD
data[j] = temp; M!iYj+nrP
} _UUp+Hz
} k5)e7Lb(