[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; LA!?H]
} k|e7a2Wwt
int i1=l; FvaUsOy"
int i2=mid+1; [>jbhV'
for(int cur=l;cur<=r;cur++){ 0at/c-K`
if(i1==mid+1) jZu[n)u'C
data[cur]=temp[i2++]; {3|t;ZHk
else if(i2>r) <wk!hTmW
data[cur]=temp[i1++]; qmkAg }2
else if(temp[i1] data[cur]=temp[i1++]; HZ aV7dOZ8
else !EvAB+`jLI
data[cur]=temp[i2++]; !y\'EW3|G
} 4`4kfiS$
} W>${zVu
^=GC3% J
} ui<N[
|UkR'Ma
改进后的归并排序: Gt\lFQ
a!zz6/q[
package org.rut.util.algorithm.support; D#_3^Kiawj
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import org.rut.util.algorithm.SortUtil; G!Op~p@Jm
7BE>RE=)
/** ux=w!y;}
* @author treeroot 'j`=if
* @since 2006-2-2 !O\82d1P
* @version 1.0 vDp8__^
*/ G"r1+#
public class ImprovedMergeSort implements SortUtil.Sort { W,K;6TZhh
Ansk,$
private static final int THRESHOLD = 10; 1$xNUsD2
h1j!IG
/* M92dZ1+6
* (non-Javadoc) tZ]?^_Y1
* / kF)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W\>fh&!)
*/ Cz9xZA{[M
public void sort(int[] data) { ,kyJAju>
int[] temp=new int[data.length]; q_MPju&*
mergeSort(data,temp,0,data.length-1); [8Y:65
} b_$4V3TA
ST|x23|O]
private void mergeSort(int[] data, int[] temp, int l, int r) { zykT*V
int i, j, k; hwPw]Ln/
int mid = (l + r) / 2; ~Q Oe##
if (l == r) F|IAiE
return; lS"T4 5
if ((mid - l) >= THRESHOLD) Jf{*PgP
mergeSort(data, temp, l, mid); <ykU6=
else E@z<:pG{
insertSort(data, l, mid - l + 1); &yct!YOB2
if ((r - mid) > THRESHOLD) _?-E7:Sw
mergeSort(data, temp, mid + 1, r); j@AIK+0Qc
else ?fQ'^agq
insertSort(data, mid + 1, r - mid); @bi}W`
RF`.xQ26=
for (i = l; i <= mid; i++) { OTvPUkp*
temp = data; 1D7nkAy
} WltQ63u
for (j = 1; j <= r - mid; j++) { xzdf^Ce
temp[r - j + 1] = data[j + mid]; GF"hx`zyJ
} ]{sU&GqBLe
int a = temp[l]; Ryl:a\
int b = temp[r]; "SNn^p59k
for (i = l, j = r, k = l; k <= r; k++) { |'e^QpU5
if (a < b) { Q{O+
data[k] = temp[i++]; l#g\X'bK
a = temp; Z]A{ d[
} else { 8f_l}k$Eg
data[k] = temp[j--]; 1gE [v
b = temp[j]; Bj+S"yS
} #QS`_TlKk
} Q1T$k$n
} IDad9 Bx
]vz%iv_
/** a1g,@0s
* @param data gI&#o@Pm
* @param l e+=y*OmQ
* @param i ,L|%"K]yM
*/ t*=CZE-
private void insertSort(int[] data, int start, int len) { EH-sZAv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `jDTzhO~
} 5^}\4.eXo
} %p Ynnfr
} SUMrFd~
} o5u3Fjz3
,dv+p&Tz2
堆排序： -{KQr1{5UM
CLxynZ\;
package org.rut.util.algorithm.support; Bm:98? [
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import org.rut.util.algorithm.SortUtil; ,[N%Q#
Ka'=o?'B5
/** nB_?ckj,
* @author treeroot C>]0YO k2
* @since 2006-2-2 kq?Ms|h
* @version 1.0 0B[="rTS7#
*/ v|Pv 03%?7
public class HeapSort implements SortUtil.Sort{ ,j#XOy`mzy
-5)H<dAQZ
/* (non-Javadoc) hE &xE;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G?9"Y%
*/ EW}Bzh>b
public void sort(int[] data) { ##q2mm:a9P
MaxHeap h=new MaxHeap(); DKH-Q(M56
h.init(data); H!@kO]?n
for(int i=0;i h.remove(); ww)<E`eGi
System.arraycopy(h.queue,1,data,0,data.length); -r!. 9q
} dydc}n
.fn\]rUv
private static class MaxHeap{ !({}(!P .
a`wc\T^
void init(int[] data){ FW;m\vu
this.queue=new int[data.length+1]; , |0}<%
for(int i=0;i queue[++size]=data; .14~J6
fixUp(size); #F:p-nOq
} 2kqup)82e
} q'+)t7!
7( #:GD
private int size=0; T*I{WW
]q\b,)4 e
private int[] queue; <c*FCblv
4aug{}h("
public int get() { [Hx0`Nc K
return queue[1]; 0}<|7?
} 3t.l5m Rg5
Z3%}ajPu[
public void remove() { #^#PPO
SortUtil.swap(queue,1,size--); [m->5H
fixDown(1); SDL7<ZaE
} Eu0akqZ
file://fixdown 'Oxy$U
private void fixDown(int k) { XUrXnz|>
int j; PG2:~$L0
while ((j = k << 1) <= size) { (|F*vP'
if (j < size %26amp;%26amp; queue[j] j++; '"`IC\N^
if (queue[k]>queue[j]) file://不用交换 R1PkTZP&
break; )tG\vk=@
SortUtil.swap(queue,j,k); NxfOF
k = j; *=) cQeJ
} E!;SL|lj.
} XYQ/^SI!:
private void fixUp(int k) { wDw[RW3
while (k > 1) { N[?N5~jG
int j = k >> 1; OwuE~K7b{
if (queue[j]>queue[k]) aasoW\UG
break; 5b5x!do
SortUtil.swap(queue,j,k); c7?_46J
k = j; -Mip,EO
} P=qa::A
} >3ZFzh&OYQ
f}6s Q5
} o5d%w-'
qjwxhabc
} /{Is0+)
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SortUtil： qjc8fP2
Nv$R\'3
package org.rut.util.algorithm; W'els)WJ|x
hC:n5]K
import org.rut.util.algorithm.support.BubbleSort; GXcJ< v
import org.rut.util.algorithm.support.HeapSort; w!#tTyk`
import org.rut.util.algorithm.support.ImprovedMergeSort; (XVw"m/ye
import org.rut.util.algorithm.support.ImprovedQuickSort; M\vwI"
import org.rut.util.algorithm.support.InsertSort; Cmu@4j&
import org.rut.util.algorithm.support.MergeSort; MvuQz7M#d
import org.rut.util.algorithm.support.QuickSort; % BVs47g
import org.rut.util.algorithm.support.SelectionSort; ysJQb~2q
import org.rut.util.algorithm.support.ShellSort; >u>5{4
)S3\,S-.
/** "Hya6k>j
* @author treeroot IO wj>t
* @since 2006-2-2 9K.Vb1&
* @version 1.0 1Vsz4P"O $
*/ A_V]yP
public class SortUtil { ]E7F/O/.
public final static int INSERT = 1; 3^IpE];+:u
public final static int BUBBLE = 2; Gq+z/Be
public final static int SELECTION = 3; f W!a|?e$
public final static int SHELL = 4; !]42^?GH
public final static int QUICK = 5; 2iHUZzz\
public final static int IMPROVED_QUICK = 6; !NIhx109q
public final static int MERGE = 7; @X%C>iYa9
public final static int IMPROVED_MERGE = 8; ]Gzm^6v
public final static int HEAP = 9; i3dkYevs?
)(A]Ln4
public static void sort(int[] data) { v5/~-uRL%
sort(data, IMPROVED_QUICK); }\hVy(\c
} x`U^OLV
private static String[] name={ d+<G1w&z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %fc!2E9|
}; ng[Ar`
8G9s<N}5&u
private static Sort[] impl=new Sort[]{ H=@}=aPf
new InsertSort(), [I0:=yJ+
new BubbleSort(), C'G/AU
new SelectionSort(), \<.+rqa!
new ShellSort(), 63^O|y\W8
new QuickSort(), 8H;t_B
new ImprovedQuickSort(), EtJHR
new MergeSort(), wHzEMwY_
new ImprovedMergeSort(), grS:j+_M2m
new HeapSort() j-0z5|*KE
}; lyIl-!|
) dn(G@5
public static String toString(int algorithm){ T m,b,hi$
return name[algorithm-1]; @>u]4Jn
} \@WDV
l2`s! ,<>O
public static void sort(int[] data, int algorithm) { >x/z7v?^I
impl[algorithm-1].sort(data); Bs13^^hu
} SlgN&{Bk
-5 RD)(d
public static interface Sort { ccNd'2P
public void sort(int[] data); |)nZ^Cc
} p s/Ayjk
7OC#8,
public static void swap(int[] data, int i, int j) { jDKO} bQ
int temp = data; 5BWH-2HsB
data = data[j]; >5_2_Y$"
data[j] = temp; "/)#O~
} Diy8gt
} 2!0c4a^z