[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; oUr66a/[U
} 9@:2wR |
int i1=l; $q{!5-e
int i2=mid+1; Y;Dp3v!
for(int cur=l;cur<=r;cur++){ m%?pf2%I#
if(i1==mid+1) xY8$I6
data[cur]=temp[i2++]; Jbg/0|1
else if(i2>r) J26VnK
data[cur]=temp[i1++]; {n.PF8A5X
else if(temp[i1] data[cur]=temp[i1++]; :$|HNeDO
else 9Cp-qA%t
data[cur]=temp[i2++]; M}-Rzc
} |?xN\O^#}
} t%FwXaO#
G]tn i
} ]t,BMu=%
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改进后的归并排序: @6sqMw}
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package org.rut.util.algorithm.support; 7~p@0)''
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import org.rut.util.algorithm.SortUtil; 9(7-{,c
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/** aEWWP]
* @author treeroot 1Z2HUzqh.
* @since 2006-2-2 t+G#{n
* @version 1.0 A#<?4&
*/ V>LwqS~`
public class ImprovedMergeSort implements SortUtil.Sort { .},'~NM]
7`Ak)F:V
private static final int THRESHOLD = 10; h0f;F@I
\fdv]f
/* EwT"uL*V;
* (non-Javadoc) eA?RK.e
* fu ,}1Mq#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,WYPU
*/ $G+@_'
public void sort(int[] data) { EjR9JUu
int[] temp=new int[data.length]; (D&3G;0tK
mergeSort(data,temp,0,data.length-1); k FD;i
} )[IC?U:5I
^*Q ?]N
private void mergeSort(int[] data, int[] temp, int l, int r) { 7"x;~X
int i, j, k; S Lj!v&'
int mid = (l + r) / 2; xml7Uarc
if (l == r) pRpBhm;iJ
return; -20bPiM$A
if ((mid - l) >= THRESHOLD) hEH?[>9
mergeSort(data, temp, l, mid); s`8= 3]w
else #L;dI@7C
insertSort(data, l, mid - l + 1); 69NeQ$](
if ((r - mid) > THRESHOLD) {duz\k2
mergeSort(data, temp, mid + 1, r); }C?'BRX
else 4f@rv^f(X
insertSort(data, mid + 1, r - mid); WDD%Q8ejV&
itP,\k7>d
for (i = l; i <= mid; i++) { =BAr .m+"
temp = data; _8J.fT$${
} sb*G!8j
for (j = 1; j <= r - mid; j++) { !;{7-~
temp[r - j + 1] = data[j + mid]; HM1Fz\Sf
} q~o<*W
int a = temp[l]; :\c ^*K(9
int b = temp[r]; ie95rZp
for (i = l, j = r, k = l; k <= r; k++) { a#k6&3m&
if (a < b) { P|E| $)m
data[k] = temp[i++]; 6;d*r$0Fc
a = temp; 1(R}tRR7R
} else { ZvX*t)VjTz
data[k] = temp[j--]; _6hQ %hv8
b = temp[j]; M FMs[+2_o
} BwpqNQN
} Q"d^_z]K
} &PHTpkaam
;xj?z\=Pg
/** \?-<4Bc@
* @param data !>o7a}?
* @param l T3<4B!UB&
* @param i '<)n8{3Q5w
*/ Q&tG4f<
private void insertSort(int[] data, int start, int len) { L`TLgH&?R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1R%.p7@5QU
} ML 9' |
} )2o?#8J
} O8r|8]o
} pah'>dAL
t!l&iVWs
堆排序： ^[`%&uj!g
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package org.rut.util.algorithm.support; /36:ms A
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import org.rut.util.algorithm.SortUtil; {}przrU^c
&Z@o Q
/** i&fuSk EP
* @author treeroot &6!)jIWJ
* @since 2006-2-2 vh%B[brUJ
* @version 1.0 K5h
*/ (5YM?QAd
public class HeapSort implements SortUtil.Sort{ <n$'voR7]
F/{!tx
/* (non-Javadoc) T'9'G M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :3Ox~o
*/ ? OM!+O
public void sort(int[] data) { M7~2iU<#
MaxHeap h=new MaxHeap(); Wn2NMXK
h.init(data); 9TC,!0U{_.
for(int i=0;i h.remove(); uGGt\.$]s
System.arraycopy(h.queue,1,data,0,data.length); .`eN8Dl1
} FVKTbvYn
CAhXQ7w'Z
private static class MaxHeap{ 2%m BK
_V6ukd"B~
void init(int[] data){ ouQ T
this.queue=new int[data.length+1]; 03Ycf'W
for(int i=0;i queue[++size]=data; f$$/H>MJ
fixUp(size); g!|kp?
} XpHrt XD
} J ZS:MFA
!F$6-0%
private int size=0; gwMNYMI
F$]Pk|,
private int[] queue; =:pJ
8nV+e~-w
public int get() { bY:x8fl
return queue[1]; q0vQa
} ,f>k%_U}
Y:[u1~a
public void remove() { u*`GiZAO
SortUtil.swap(queue,1,size--); 8lrpve
fixDown(1); #X1ND
} #\OA)`U
file://fixdown ~f98#43
private void fixDown(int k) { aW7^d'ZZ\
int j; 8l`*]1.W<
while ((j = k << 1) <= size) { #*Ctwl,T
if (j < size %26amp;%26amp; queue[j] j++; 4!?eRY
if (queue[k]>queue[j]) file://不用交换 wmLs/:~
break; VI86KJu
SortUtil.swap(queue,j,k); ^ Ze=uP
k = j; q/,O\,
} Q;rX;p^W
} "chDg(jMZ
private void fixUp(int k) { e9B064
while (k > 1) { iYy1!\
int j = k >> 1; S,he6zS
if (queue[j]>queue[k]) rx|pOz,:
break; 4kx N<]
SortUtil.swap(queue,j,k); rey!{3U
k = j; =aW9L)8D
} %.|@]!C
} Km$\:Xo
9%9#_?RW
} bk[!8-b/a
NzvXN1_%
} +I28|*K"
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SortUtil： K$=zi}J W
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package org.rut.util.algorithm; #H~64/
M\BRcz
import org.rut.util.algorithm.support.BubbleSort; 0g8NHkM:2a
import org.rut.util.algorithm.support.HeapSort; T>W,'H
import org.rut.util.algorithm.support.ImprovedMergeSort; ]Y&VT7+Z
import org.rut.util.algorithm.support.ImprovedQuickSort; +ZP7{%
import org.rut.util.algorithm.support.InsertSort; i83OOV$1J
import org.rut.util.algorithm.support.MergeSort; f/?P514h
import org.rut.util.algorithm.support.QuickSort; (tW`=]z-<
import org.rut.util.algorithm.support.SelectionSort; BI@[\aRLQ
import org.rut.util.algorithm.support.ShellSort; $I?"lky
8}:nGK|kx
/** y6BAH
* @author treeroot V0mn4sfs
* @since 2006-2-2 ]`WJOx4
* @version 1.0 Mi_$">1-W
*/ )^hbsMhO
public class SortUtil { ?S=mybp
public final static int INSERT = 1; %WS+(0*1
public final static int BUBBLE = 2; JBZ@'8eqi]
public final static int SELECTION = 3; [:*)XeRK
public final static int SHELL = 4; _+MJ%'>S
public final static int QUICK = 5; GM<9p_ B
public final static int IMPROVED_QUICK = 6; _Fg5A7or
public final static int MERGE = 7; aN3;`~{9
public final static int IMPROVED_MERGE = 8; ?a]mDx>xh
public final static int HEAP = 9; )4;`^]F
+=)+'q]S
public static void sort(int[] data) { jebx40TA3
sort(data, IMPROVED_QUICK); qH_Dc=~la
} 1$ {SRU7l
private static String[] name={ u*9V&>o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rytyw77t(
}; 1o>xEWt:0K
veECfR;
private static Sort[] impl=new Sort[]{ (/] J3
new InsertSort(), N'=gep0V@
new BubbleSort(), [Ch.cE_
new SelectionSort(), 7G],T++N
new ShellSort(), klhtKp_p
new QuickSort(), 2Tppcj v
new ImprovedQuickSort(), [2cD:JL
new MergeSort(), _@/8gPT*i
new ImprovedMergeSort(), j] [,J49L
new HeapSort() q@2siI~W
}; f*8DCh!r"
/Z4et'Lo
public static String toString(int algorithm){ Dvln/SBk
return name[algorithm-1]; !}$$:
} TD_Oo-+\
*Pg2c(Vg
public static void sort(int[] data, int algorithm) { ySI!d|_
impl[algorithm-1].sort(data); g9F?z2^
} bg0Wnl
\l3h0R
public static interface Sort { m#p'iU*va,
public void sort(int[] data); T51 `oZ`
} > Nr#O
Rf1x`wml
public static void swap(int[] data, int i, int j) { akQ7K
int temp = data; Oow2>F%_#
data = data[j]; BDVtSs<7
data[j] = temp; 8dhUBJ0_
} v &+R^iLE
} i}?>g-(