[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; zE<Iv\Q
} dr(-k3ex
int i1=l; 14"+ctq
int i2=mid+1; 7{]dh+)
for(int cur=l;cur<=r;cur++){ d@ >i=l [
if(i1==mid+1) 1Au+X3
data[cur]=temp[i2++]; Xo:Mar
else if(i2>r) 2e-`V5{)b
data[cur]=temp[i1++]; x0b=r!Duu
else if(temp[i1] data[cur]=temp[i1++]; zO---}[9a
else h5rR44
data[cur]=temp[i2++]; damG*-7Svx
} Jt[,V*:#
} LRg]'?
v3aPHf
} DR{O.TX
@({=~ W^
改进后的归并排序: 7nPcm;Er
FZ?:BX^
package org.rut.util.algorithm.support; 5.*,IedY
? 3OfiGX?
import org.rut.util.algorithm.SortUtil; Xi1|%
>[Wjzg
/** 0k{\W
* @author treeroot =@0J:"c
* @since 2006-2-2 YVwpqOE.=
* @version 1.0 ]'"Sa<->
*/ 641P)
public class ImprovedMergeSort implements SortUtil.Sort { bU}v@Uk
l -xc*lC
private static final int THRESHOLD = 10; x1?mE)n]
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/* .1q}mw
* (non-Javadoc) hHhDs>tB
* ,:e~aG,B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J8!2Tt
*/ Q#G xo
public void sort(int[] data) { i6KB\W2
int[] temp=new int[data.length]; Q3(ulgl]
mergeSort(data,temp,0,data.length-1); J_h.7V
} I8YUq
I`_I^C3
private void mergeSort(int[] data, int[] temp, int l, int r) { lKw-C[
int i, j, k; [8a(4]4
int mid = (l + r) / 2; e.skE>&
if (l == r) |$b8(g$s)
return; y]0O"X-G
if ((mid - l) >= THRESHOLD) x};~8lGT>t
mergeSort(data, temp, l, mid); >x JzV
else ~f(5l.
insertSort(data, l, mid - l + 1); ]c~yMA+]FZ
if ((r - mid) > THRESHOLD) Uffwzd!
mergeSort(data, temp, mid + 1, r); *d3-[HwZCL
else NJQ)Ttt
insertSort(data, mid + 1, r - mid); Sz@z 0'
T{k_3[{0o
for (i = l; i <= mid; i++) { Gk{ 'U
temp = data; VaY#_80$s
} k9f|R*LM
for (j = 1; j <= r - mid; j++) { L?j0t*do
temp[r - j + 1] = data[j + mid]; zQ|2D*W
} [9${4=Kq
int a = temp[l]; *{vH9TO
int b = temp[r]; XZ~kXE;B(
for (i = l, j = r, k = l; k <= r; k++) { 3fhY+$tq
if (a < b) { Q $}#&
data[k] = temp[i++]; \0x>#ygX
a = temp; } Xo#/9
} else { ["<Xh0_
data[k] = temp[j--]; {#qUZ z-
b = temp[j]; dazNwn
} LNWS
} "t&=~eOe3
} -0d9,,c
<7VLUk}
/** xeSch?}
* @param data W|m(Jh[w]
* @param l \Q|-Npw
* @param i AQUAQZc
*/ BV B2$&eJ
private void insertSort(int[] data, int start, int len) { Q-'j131[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J)>DsQ+Cj
} SjB"#E)
} \jwG*a
} 1H-Y3G>jN
} a]u.Uqyx2w
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堆排序： ZKXE7p i
P!W%KobZ7|
package org.rut.util.algorithm.support; 1`K-f m)
Q;$k?G=l
import org.rut.util.algorithm.SortUtil; xrPZy*Y,
e'.BTt58Y
/** -/pz3n
* @author treeroot pPBXUu'
* @since 2006-2-2 G0UaE1n
* @version 1.0 {P8d^=#q
*/ 4{YA['
public class HeapSort implements SortUtil.Sort{ \R<MQ# x
f?UI+TU
/* (non-Javadoc) (<eLj Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N l@G\_
*/ iAk:CJ{
public void sort(int[] data) { 9jTBLp-i#N
MaxHeap h=new MaxHeap(); ,2fi`9=\
h.init(data); ]ZcivnN#
for(int i=0;i h.remove(); x vs=T
System.arraycopy(h.queue,1,data,0,data.length); .jCGtR )%
} X[o+Y@bc
!0,q[|m
private static class MaxHeap{ 'Gn>~m
T]De{nHu
void init(int[] data){ SA +d4P_T
this.queue=new int[data.length+1]; +c))fPuV
for(int i=0;i queue[++size]=data; e"t0 rScA
fixUp(size); $Q/@5f'T`9
} /aI@2]|~
} +>#SNZ[
2T&MVl!%
private int size=0; PY5&Fwjc
uCDe>Q4@/
private int[] queue; jsN[Drra
T)\}V#iA*
public int get() { ipwlP|UjQ5
return queue[1]; z$?F^3>
} ['IH*gi
hik.qK
public void remove() { ?XHQdN3e
SortUtil.swap(queue,1,size--); e]RzvWq
fixDown(1); a<<4gXx
} ]@#9B>v=
file://fixdown |fgUW.
private void fixDown(int k) { \_`qon$9
int j; \jiE:Qt
while ((j = k << 1) <= size) { |SkQe[t
if (j < size %26amp;%26amp; queue[j] j++; #%"G[B
if (queue[k]>queue[j]) file://不用交换 Zk=,`sBC
break; iwK.*07+
SortUtil.swap(queue,j,k); }3{eVct#|
k = j; m.K cTM%j
} 9r?Z'~,Za
} bTum|GWf
private void fixUp(int k) { #dZs[R7h
while (k > 1) { 1C<cwd;9
int j = k >> 1; CeYhn\m5K0
if (queue[j]>queue[k]) b(0<,r8
break; G,)zn9X
SortUtil.swap(queue,j,k); j}^w:W76
k = j; o]<Z3)
} ~!$"J}d}<
} ,&_H
X<%D@$
} Oh! {E5!)
[[$CtqLg
} ;:6\w!fc
\V>5)Rn
SortUtil： N{v)pu.
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package org.rut.util.algorithm; TF8#I28AD
^p3GT6
import org.rut.util.algorithm.support.BubbleSort; "W7|Xp
import org.rut.util.algorithm.support.HeapSort; ]>X_E%`G<b
import org.rut.util.algorithm.support.ImprovedMergeSort; bXs=<`>
import org.rut.util.algorithm.support.ImprovedQuickSort; $%~JG(
import org.rut.util.algorithm.support.InsertSort; }^&S^N7
import org.rut.util.algorithm.support.MergeSort; ~&<#H+O
import org.rut.util.algorithm.support.QuickSort; 4CM'I~
import org.rut.util.algorithm.support.SelectionSort; RCWmdR#}V
import org.rut.util.algorithm.support.ShellSort; RNk|h
1{a%V$S[
/** 4qid+ [B
* @author treeroot Wlc&QOfF
* @since 2006-2-2 g+#awi7
* @version 1.0 M6g8+sio
*/ o!tC{"g
public class SortUtil { K?uZIDo
public final static int INSERT = 1; +x2JC' -H
public final static int BUBBLE = 2; CYaN;HV@_
public final static int SELECTION = 3; 7X>IS#W]
public final static int SHELL = 4; q_b!+Y
public final static int QUICK = 5; <A,V/']
public final static int IMPROVED_QUICK = 6; m Q9dF,
public final static int MERGE = 7; @su<h\)
public final static int IMPROVED_MERGE = 8; &D<R;>iI
public final static int HEAP = 9; `g]
G=:/v
public static void sort(int[] data) { yNvAT>H
sort(data, IMPROVED_QUICK); sT)>Vdwf_
} Tc^ 0W=h
private static String[] name={ }Fjbj5w0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1&MCS%UTL
}; 83vMj$P
`dvg5qQ
private static Sort[] impl=new Sort[]{ 0i*V?
new InsertSort(), ;C@mT;hR
new BubbleSort(), YlrN^rO
new SelectionSort(), K0gQr.J53
new ShellSort(), ]X6<yzu&+l
new QuickSort(), ;%e)t[5
new ImprovedQuickSort(), 4LTm&+(5
new MergeSort(), %,T*[d&i
new ImprovedMergeSort(), ;iKLf~a a
new HeapSort() p{w-
}; x%EGxs;>^
:r*hY$v
public static String toString(int algorithm){ Fl`U{03
return name[algorithm-1]; %YR&>j k
} njs:
dxX`\{E
public static void sort(int[] data, int algorithm) { ]hS:0QE
impl[algorithm-1].sort(data); m4/qxm"Dx:
} Vm%G q
~F,~^r!Jtu
public static interface Sort { aKj|gwo!
public void sort(int[] data); u9"=t
} 7P<VtS
h&'|^;FM
public static void swap(int[] data, int i, int j) { l'"nU6B&
int temp = data; >Z!!`0{
data = data[j]; P73GH
data[j] = temp; qX@e+&4P0
} 99=~vNn
} %/A>'p,~