[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; \q1%d.\X
} zPkPC}f(O
int i1=l; vhEs+j
int i2=mid+1; }R5&[hxh4t
for(int cur=l;cur<=r;cur++){ Odtck9L
if(i1==mid+1) `6sQlCOnF
data[cur]=temp[i2++]; RTY4%6]O
else if(i2>r) 7%!KAtc
data[cur]=temp[i1++]; hPpXB:(-0
else if(temp[i1] data[cur]=temp[i1++]; ;k%sKVP
else ZWW8Hr
data[cur]=temp[i2++]; $K5s)!
} 3M*[a~
} cH-Zj
CgKSK0/a
} ?N*@o.
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改进后的归并排序: 0a%ui2k
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package org.rut.util.algorithm.support; |M>k &p,B-
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import org.rut.util.algorithm.SortUtil; CPeK0(7Zh
I3$vw7}5Y
/** _rJSkZO
* @author treeroot Z_~DTO2Qg
* @since 2006-2-2 FEmlC,%
* @version 1.0 gj;G:;1m
*/ uWj-tzu
public class ImprovedMergeSort implements SortUtil.Sort { 76r s)J[*w
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private static final int THRESHOLD = 10; _-\{kJ
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/* T2; 9
* (non-Javadoc) q.F1Jj
* B"zg85 e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3 v$4LY
*/ #}yFHM?i
public void sort(int[] data) { J5IJy3d
int[] temp=new int[data.length]; u.Yb#?
mergeSort(data,temp,0,data.length-1); X*"O'XCA
} bd*(]S9d
r8>?-P
private void mergeSort(int[] data, int[] temp, int l, int r) { '="){
int i, j, k; @}!$NI8
int mid = (l + r) / 2; kDa#yN\
if (l == r) +rP<m
return; :8wF0n-'
if ((mid - l) >= THRESHOLD) !`=?<Fl
mergeSort(data, temp, l, mid); 6e|5qKr
else $*-L8An?
insertSort(data, l, mid - l + 1); Cjk AQ(9
if ((r - mid) > THRESHOLD) ;<<IXXKU
mergeSort(data, temp, mid + 1, r); S$On$]~\"
else 2`m_"y
insertSort(data, mid + 1, r - mid); @il}0
6l7a9IJ
for (i = l; i <= mid; i++) { bLF0MVLM
temp = data; v[3sg2.
} d`7] reh
for (j = 1; j <= r - mid; j++) { hzo,.hS's
temp[r - j + 1] = data[j + mid]; qW>J-,61/
} #[yl;1)
int a = temp[l]; &>fd:16
int b = temp[r]; e"/X*xA
for (i = l, j = r, k = l; k <= r; k++) { AR3=G>hO,
if (a < b) { L"/ato
data[k] = temp[i++]; ^D[;JV
a = temp; k>hZ
} else { k8V0-.UL}
data[k] = temp[j--]; Wh_c<E}&
b = temp[j]; CI'5JOqP
} E/;YhFb[
} \c}r6xOr
} >C3 9`1
[1CxMk~"[
/** .utL/1Ej
* @param data 9E?>B3t^
* @param l \ y",Qq?
* @param i oP 0j>i,"&
*/ h--bN*}H2
private void insertSort(int[] data, int start, int len) { HI 61rXNF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7HFO-r118
} 0eP~F2<bC
} ev >9P
} B ;$8<
} 0u\@-np
l}/UriZ0
堆排序： /[5up
^umAfk5r?H
package org.rut.util.algorithm.support; rnE'gH(V'
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import org.rut.util.algorithm.SortUtil; +-d>Sl (
RBwV+X[B
/** ^yTN(\9
* @author treeroot U$bM:d
* @since 2006-2-2 4*X$Jle|
* @version 1.0 V485Yn!$(
*/ MsQS{ok+
public class HeapSort implements SortUtil.Sort{ +Ti@M1A&
Cx~z^YP'
/* (non-Javadoc) DlI|~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +Wc[$,vk
*/ 9k&$bC+Q
public void sort(int[] data) { do7{
MaxHeap h=new MaxHeap(); K? k`U,
h.init(data); FG\?_G
for(int i=0;i h.remove(); %xz02$k
System.arraycopy(h.queue,1,data,0,data.length); sNVD"M,
} S(l^TF
WcFZRy-erc
private static class MaxHeap{ ! +7ve[z
HfPeR8I%i
void init(int[] data){ "RA$Twhj
this.queue=new int[data.length+1]; O~VUViS6$
for(int i=0;i queue[++size]=data; n0q(EQy1U
fixUp(size); >w2u
} -bF+uCfba
} * =l9gv&
+ aFjtb
private int size=0; ppjrm
nv]64mL3
private int[] queue; [bXZPIz;j
:9Pqy pd+
public int get() { Fu$sfq
return queue[1]; 'P#I<?vB
} 9nE%r\H
5hMiCod
public void remove() { Q23y.^W%c
SortUtil.swap(queue,1,size--); .O^|MhBJu
fixDown(1); 0 CS_-
} {5h_$a!TaU
file://fixdown NYeg,{q
private void fixDown(int k) { ,<7f5qg"'
int j; 3Y8 V?* 1|
while ((j = k << 1) <= size) { Z#04 ]
if (j < size %26amp;%26amp; queue[j] j++; Tw5BvB1
if (queue[k]>queue[j]) file://不用交换 4r*6fJ*bJ
break; cS"6%:hQ
SortUtil.swap(queue,j,k); ZHJzh\?
k = j; aXagiz\;
} Wwz{98,K
} (x@"Dp=MZW
private void fixUp(int k) { =[&Jxy>Y
while (k > 1) { I_rVeMw=
int j = k >> 1; Fz% n!d
if (queue[j]>queue[k]) XEI]T~
break; ( 9l|^w["
SortUtil.swap(queue,j,k); Lsdu:+-
k = j; j>iM(8`t1
} T5h[{J^
} =Sq7U^(>
y8@!2O4
} `UR.Rn/x
cg5DyQ(
} `g~-5Z~J
5{> cfN\q
SortUtil： m[f\I^\%8
%y q}4[S+o
package org.rut.util.algorithm; I f(_$>
uu>g(q?4II
import org.rut.util.algorithm.support.BubbleSort; a4yU[KK
import org.rut.util.algorithm.support.HeapSort; NO1PGen
import org.rut.util.algorithm.support.ImprovedMergeSort; s5HbuyR^
import org.rut.util.algorithm.support.ImprovedQuickSort; T"jl;,gr]J
import org.rut.util.algorithm.support.InsertSort; LFC k6 R
import org.rut.util.algorithm.support.MergeSort; >+r2I%
import org.rut.util.algorithm.support.QuickSort; vhC"f*
import org.rut.util.algorithm.support.SelectionSort; ?m6E@.{
import org.rut.util.algorithm.support.ShellSort; VbjFQ@[l!
1tDN$rM5
/** Z6p>R;9n
* @author treeroot I(.XK ucU
* @since 2006-2-2 w#XJ!f6*_9
* @version 1.0 XV&3h>5
*/ cW RY[{v
public class SortUtil { sXWMXQ3
public final static int INSERT = 1; qA30G~S
public final static int BUBBLE = 2; O_ cK4
public final static int SELECTION = 3; 1^COR+>L
public final static int SHELL = 4; ?=l(29tH
public final static int QUICK = 5; So:89T
public final static int IMPROVED_QUICK = 6; !v-(O"a
public final static int MERGE = 7; #?9oA4Q
public final static int IMPROVED_MERGE = 8; gS%J`X$
public final static int HEAP = 9; e/6oC~#]
3-05y!vbcE
public static void sort(int[] data) { +vP1DXtj(
sort(data, IMPROVED_QUICK); w%ForDB>P
} D+V^nCcx%
private static String[] name={ 8Y9mB#X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V;!D:N8<
}; ^6`U0|5mRX
l},%g%}iMU
private static Sort[] impl=new Sort[]{ p82qFzq#
new InsertSort(), i=ba=-"Mt
new BubbleSort(), z)26Ahm TV
new SelectionSort(), o|+tRl
new ShellSort(), F~B8XUa3
new QuickSort(), Ah,Zm4:
new ImprovedQuickSort(), nT>?}/S
new MergeSort(), Oj:`r*z43
new ImprovedMergeSort(), Lv_>cFJ}[
new HeapSort() }IV7dKzl
}; cH#`f4
=<g\B?s]
public static String toString(int algorithm){ C}!|K0t?
return name[algorithm-1]; [8"nRlXH
} V;m3=k0U
^^Ius ]
public static void sort(int[] data, int algorithm) { <ANKoPNie
impl[algorithm-1].sort(data); #&2mu
} DeUDZL%/
((y+FJH
public static interface Sort { dL"v*3Fy
public void sort(int[] data); ?$ 3=m)s
} NM4 n
lBCM;#P
public static void swap(int[] data, int i, int j) { &(K*TB|Om
int temp = data; f /jN$p
data = data[j]; Gqs8$[o
data[j] = temp; hi37p1t
} cIgF]My*D@
} 1G\ugLm