[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; PIu1+k.r?
} yku5SEJ\
int i1=l; 0 q}*S~
int i2=mid+1; vms|x wb
for(int cur=l;cur<=r;cur++){ $~VRza 8Q
if(i1==mid+1) JtEo'As:[
data[cur]=temp[i2++]; 1IC~e^"
else if(i2>r) 5ni~Q 9b
data[cur]=temp[i1++]; T 6)bD&
else if(temp[i1] data[cur]=temp[i1++]; b{L/4bu
else 5nT"rA
data[cur]=temp[i2++]; jbVECi-
} 9Uj$K>:
} &PYK8}pBk3
NG "C&v
} r'^Hg/Jzt
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改进后的归并排序: E"qRw_ ~t
kYG/@7f/
package org.rut.util.algorithm.support; QPx_-
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import org.rut.util.algorithm.SortUtil; D^l%{IG
$8UUzk
/** CE#gfP
* @author treeroot jcuB
* @since 2006-2-2 /{+y2.{j
* @version 1.0 D8Ykg >B;&
*/ 95 ;x=ju
public class ImprovedMergeSort implements SortUtil.Sort { B@&4i?yJ
M?Dfu .t
private static final int THRESHOLD = 10; DI:]GED"=
QZ6D7tUc8
/* pR(jglm7-
* (non-Javadoc) NidIVbT.A
* B8f8w)m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `|{-+m
*/ _P0T)-X\(
public void sort(int[] data) { "e.jZcN*
int[] temp=new int[data.length]; B* ?]H*K
mergeSort(data,temp,0,data.length-1); DJ'zz&K
} coW:DFX
_I@9HC 4
private void mergeSort(int[] data, int[] temp, int l, int r) { Fv~20G(O
int i, j, k; YC++&Nk
int mid = (l + r) / 2; ;j[>9g
if (l == r) h"X;3b^ m
return; &,zq%;-f
if ((mid - l) >= THRESHOLD) |bTPtrT8
mergeSort(data, temp, l, mid); G`cHCP_n
else ZA0mz 65
insertSort(data, l, mid - l + 1); vHyC;4'
if ((r - mid) > THRESHOLD) zHA!%>%'
mergeSort(data, temp, mid + 1, r); R3x3]]D
else qTdheX/
insertSort(data, mid + 1, r - mid); W>) M5t4i
K^1oDP
for (i = l; i <= mid; i++) { 5gYRwuf
temp = data; &e E=<x
} 0z1ifg&
for (j = 1; j <= r - mid; j++) { 0?s|i :
temp[r - j + 1] = data[j + mid]; %j.0G`x9 +
} t{xf:~B
int a = temp[l]; zk$FkbX
int b = temp[r]; OI|[roMK
for (i = l, j = r, k = l; k <= r; k++) { b$N2z
if (a < b) { 9IjIIM2y
data[k] = temp[i++]; yA)/Q Yge
a = temp; \pPY37l
} else { X <f8,n
data[k] = temp[j--]; mk.9OhYY
b = temp[j]; uatm/o^~,
} l4F%VR4KT
} 2BQ j
} q]T1dz?
z[b@V
/** iW$_zgN
* @param data d' !]ZWe
* @param l A,JmX
* @param i ns9U/:L
*/ /rK}?U
private void insertSort(int[] data, int start, int len) { (?n=33}Ci
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8EW_V$>R
} f.D?sHAn
} [%q@]\U$s
} dq(uVW^&ae
} azCf
;&9)I8Us
堆排序： gH12[Us'`
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package org.rut.util.algorithm.support; JZ)RGSG i
)#?"Gjf~
import org.rut.util.algorithm.SortUtil; j'Gt&\4
PQy4{0 _
/** -.1y(k^4E
* @author treeroot '*K: lx
* @since 2006-2-2 Bal$+S
* @version 1.0 GzhYY"iif#
*/ J?V?R
public class HeapSort implements SortUtil.Sort{ ^yWL,$
r(:5kC8K
/* (non-Javadoc) wo4;n9@I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h{%nC>m;
*/ e^8 O_VB
public void sort(int[] data) { c23oCfB>
MaxHeap h=new MaxHeap(); umjt]Gu[
h.init(data); }q_<_lQ
for(int i=0;i h.remove(); IdzxS
System.arraycopy(h.queue,1,data,0,data.length); qraSRK5
} gH$ Mr
p)`{Sos
private static class MaxHeap{ `.E[}W
\HqNAE2T
void init(int[] data){ SEo'(-5
this.queue=new int[data.length+1]; tI`Q/a5@
for(int i=0;i queue[++size]=data; BBaQ}{F8>2
fixUp(size); APvDP?
} o*-)Tq8GHE
} U_M$#i{_
'}9x\3E
private int size=0; hpHr\g
qyZ" %Kz
private int[] queue; =b%MXT
1a?!@g)
public int get() { O9G[j=U
return queue[1]; qU+t/C.
} VrHv)lUr
m}C>ti`VD
public void remove() { ap.K=-H
SortUtil.swap(queue,1,size--); rA3$3GLQ-
fixDown(1); Jb0`42
} tRs [ YK
file://fixdown p)jk>j B
private void fixDown(int k) { rV2WnAb[H&
int j; -z-C*%~
while ((j = k << 1) <= size) { *F+KqZ.2
if (j < size %26amp;%26amp; queue[j] j++; )P%ZA)l%_o
if (queue[k]>queue[j]) file://不用交换 lG9bLiFY
break; eX?OYDDC0j
SortUtil.swap(queue,j,k); Tl%`P_J)-S
k = j; 02f~En}>6
} 4QH3fTv
} !02`t4Zc-
private void fixUp(int k) { ~Y`ldL
while (k > 1) { ,`|3KE9
int j = k >> 1; lsJSYJG&
if (queue[j]>queue[k]) LzG%Z1`
break; Z~AO0zUKY
SortUtil.swap(queue,j,k); AS!?q
k = j; n4s+>|\M
} ];VA!++
} Q!o'}nA
-C;^3R[ O
} m!gz3u]rN
?h3Y)5xT
} 9{'N{
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SortUtil： }{,^@xdyW
FTX=Wyr
package org.rut.util.algorithm; n3T>QgK
EOIN^4V"
import org.rut.util.algorithm.support.BubbleSort; :yL] ;J
import org.rut.util.algorithm.support.HeapSort; ed]=\Key
import org.rut.util.algorithm.support.ImprovedMergeSort; i@C].X
import org.rut.util.algorithm.support.ImprovedQuickSort; ]}Mj)J"m
import org.rut.util.algorithm.support.InsertSort; US+Q~GTA
import org.rut.util.algorithm.support.MergeSort; .?D7dyU l1
import org.rut.util.algorithm.support.QuickSort; f~t:L,\,
import org.rut.util.algorithm.support.SelectionSort; ^?-:'<4q$
import org.rut.util.algorithm.support.ShellSort; Ye\rB\-
S{Kiy#ltWc
/** ?[VM6- &
* @author treeroot &c`nR<
* @since 2006-2-2 &SIq2>QA
* @version 1.0 dV*]f$wQ
*/ Gk. ruQW"
public class SortUtil { |!1Y*|Q%s
public final static int INSERT = 1; (jnzT=y
public final static int BUBBLE = 2; [/PR\'|
public final static int SELECTION = 3; ")_|69 VX
public final static int SHELL = 4; =qoWCmg"&
public final static int QUICK = 5; ls?~+\Jb
public final static int IMPROVED_QUICK = 6; 3oBtP<yG.
public final static int MERGE = 7; $'0u|Xy`
public final static int IMPROVED_MERGE = 8; %r<rcY
public final static int HEAP = 9; I.WvLLK2
XQrF4l
public static void sort(int[] data) { 4{}FL
sort(data, IMPROVED_QUICK); 9?A)n4b;
} aB*Bz]5;E
private static String[] name={ 5<iV2Hx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )mI05
}; }Q)#[#e
~t@cO.c
private static Sort[] impl=new Sort[]{ XpIklL7
new InsertSort(), Km%]1X7T6
new BubbleSort(), P!~MZ+7#&
new SelectionSort(), GSY(
new ShellSort(), P]<4R:yb
new QuickSort(), <m!h&_eg
new ImprovedQuickSort(), tf=6\p
new MergeSort(), !!qK=V|>
new ImprovedMergeSort(), u~r=)His
new HeapSort() heltgRt
}; @v$Y7mw3D
bo<~jb{
public static String toString(int algorithm){ q?,).x nN
return name[algorithm-1]; kJWn<5%ayg
} K}2Erm%A@y
(ScxLf=]
public static void sort(int[] data, int algorithm) { #&cI3i
impl[algorithm-1].sort(data); hMzs*gK
} x* DarSk
g6W)4cC8a
public static interface Sort { S_iMVHe
public void sort(int[] data); HvUxsdT
} YSs)HV.8
062,L~&E
public static void swap(int[] data, int i, int j) { "MxnFeLM#
int temp = data; 9lTv
data = data[j]; ^le<}
data[j] = temp; zuP B6W^
} *aXF5S
} >@BnV{ d