[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; %(p9AE
} KJ32L
int i1=l; R&;x_4dr^
int i2=mid+1; 97\K]Tr
for(int cur=l;cur<=r;cur++){ PN?;\k)"
if(i1==mid+1) }xt^}:D
data[cur]=temp[i2++]; & [@)Er=
else if(i2>r) \V!{z;.fA
data[cur]=temp[i1++]; ^pd7nr~Y
else if(temp[i1] data[cur]=temp[i1++]; i0/QfB%O
else ``k[CgV
data[cur]=temp[i2++]; XP o#qT8n
} @(35I
} 035jU'
Q"~%T@e
} \ui'~n_t]
#J3o~,t<
改进后的归并排序: p*42 @1,
XZ]ji9'
package org.rut.util.algorithm.support; 0+op|bdj
Ul/m]b6-
import org.rut.util.algorithm.SortUtil; /huh}&NNu
n0co* ]X+k
/** e,p*R?Y{[
* @author treeroot 5o 5DG
* @since 2006-2-2 R|(X_A
* @version 1.0 0j4n11#
*/ :{)uD ;
public class ImprovedMergeSort implements SortUtil.Sort { S-o)d
ejyx[CF
private static final int THRESHOLD = 10; -hW>1s<
R,78}7B
/* )#i"hnYpQ
* (non-Javadoc) (_ :82@c
* ,~38IIS>_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #z&R9$
*/ $t^Td<
public void sort(int[] data) { R[l`# I
int[] temp=new int[data.length]; ~!mY0odH
mergeSort(data,temp,0,data.length-1); ibZ[U p?
} KzV|::S^
P.q7rk<
private void mergeSort(int[] data, int[] temp, int l, int r) { &l]F&-
int i, j, k; Ew{*)r)m
int mid = (l + r) / 2; dl8f]y#Q
if (l == r) $mKExW
return; HLqN=vE6
if ((mid - l) >= THRESHOLD) k"gm;,`
mergeSort(data, temp, l, mid); 7J5jf231
else C4ktCN
insertSort(data, l, mid - l + 1); ob/<;SrU<
if ((r - mid) > THRESHOLD) tzd!r7
mergeSort(data, temp, mid + 1, r); [Q8Wy/o Q
else Hpz1Iy@
insertSort(data, mid + 1, r - mid); zL}`7*d:v
oXht$Q
for (i = l; i <= mid; i++) { Nb3O>&J
temp = data; Q~ Ad{yC
} %hBwc#^
for (j = 1; j <= r - mid; j++) { e<=Nd,v4;
temp[r - j + 1] = data[j + mid]; @8m%*pBg
} zQ,M795@EA
int a = temp[l]; XX90Is
int b = temp[r]; "2-D[rYZ
for (i = l, j = r, k = l; k <= r; k++) { PE6,9i0ee
if (a < b) { ! jApV
data[k] = temp[i++]; 1>\V>g9
a = temp; JBHPI@Qt%
} else { $Lbamg->E
data[k] = temp[j--]; O>vCi&
b = temp[j]; ;AVIt!(L~V
} A:y^9+Da
} ztHx) !
} wsQuJrG
l?_Fy_fBt
/** 2#yDVN$
* @param data 95j`^M)Q
* @param l ADOA&r[
* @param i <3j`Z1J
*/ B>cT<B
private void insertSort(int[] data, int start, int len) { ;<T,W[3J
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3:#6/@wQ
} +3XaAk
} e, 2/3jO
} 2/A*\
} 0uM&F[.x@g
n,s7!z/
堆排序： :|ahu
qgfP6W$
package org.rut.util.algorithm.support; `Xeiz'~f8
H0])>1sWB
import org.rut.util.algorithm.SortUtil; /+`%u&<
,UVu.RjXN
/** aqK+ u.H
* @author treeroot [742s]j
* @since 2006-2-2 fdwP@6eh
* @version 1.0 B1U!*yzG6
*/ m`$Q/SyvG
public class HeapSort implements SortUtil.Sort{ `J03t\
\k"CtzoX
/* (non-Javadoc) !kb:g]X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .:Sk=r4u\
*/ 5#X R1#`
public void sort(int[] data) { FZ]+(Q"]:
MaxHeap h=new MaxHeap(); [S~Bt78d%r
h.init(data); #+U1QOsz
for(int i=0;i h.remove(); gE^pOn
System.arraycopy(h.queue,1,data,0,data.length); }><[6Uz%
} (.Ak*
/ bH2Z
private static class MaxHeap{ v)gMNzt
0&Ftx%6%
void init(int[] data){ T"X]@9g^-
this.queue=new int[data.length+1]; !j%
for(int i=0;i queue[++size]=data; ?ILjt?X8
fixUp(size); a8Xwz@ M
} #QcRN?s
} @+p(%
/)K;XtcN
private int size=0; qbS6#7D
$YY{|8@kjv
private int[] queue; 0QfDgDX
Jn|i!
public int get() { #$2/<
return queue[1]; }#4Ek8nFR
} J#i7'9g
]e"!ZR?XJ
public void remove() { 5=#d#dDc
SortUtil.swap(queue,1,size--); oUN\tOiS+
fixDown(1); P3=#<Q.
} >35w"a7S
file://fixdown , u%V%
private void fixDown(int k) { 8c9<kGm$E
int j; -+Yark
while ((j = k << 1) <= size) { >D~8iuy]8.
if (j < size %26amp;%26amp; queue[j] j++; UyV5A
if (queue[k]>queue[j]) file://不用交换 f$-n%7
break; tH *|
SortUtil.swap(queue,j,k); HOPy&Fp
k = j; LJ@r+|>
} f>ktv76
} >C6S2ISSz
private void fixUp(int k) { G![4K#~NM
while (k > 1) { uG6.(A1LM
int j = k >> 1; [v*q%Mi_
if (queue[j]>queue[k]) 9"gu>
break; w4TQ4 Y
SortUtil.swap(queue,j,k); ['pO=ho
k = j; m&xVlS
} ;sAGTq
} &<uLr *+*
~@xPoD&
} 4\v &8">LL
`W~
} x`@`y7(
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SortUtil： \ ya@9OA
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package org.rut.util.algorithm; lA/-fUA
GCO: !,1
import org.rut.util.algorithm.support.BubbleSort; :0 n+RL*5
import org.rut.util.algorithm.support.HeapSort; gVzIEE25
import org.rut.util.algorithm.support.ImprovedMergeSort; K#X/j'$^
import org.rut.util.algorithm.support.ImprovedQuickSort; "uIaKb
import org.rut.util.algorithm.support.InsertSort; 1kL8EPT%o
import org.rut.util.algorithm.support.MergeSort; {xov8M
import org.rut.util.algorithm.support.QuickSort; OM\1TD/-
import org.rut.util.algorithm.support.SelectionSort; L{8_6s(:
import org.rut.util.algorithm.support.ShellSort; <anKw|
0!lWxS0#=
/** ZM v\j|{8
* @author treeroot Rb:<?&7ZzN
* @since 2006-2-2 zN[& iKf
* @version 1.0 z rSPa\M
*/ EUcD[Rv
public class SortUtil { kV?fie<\)
public final static int INSERT = 1; [*zg? ur
public final static int BUBBLE = 2; }a~hd*-#
public final static int SELECTION = 3; 2 Kjd!~Z$
public final static int SHELL = 4; ycc G>%>r
public final static int QUICK = 5; =%IyR
public final static int IMPROVED_QUICK = 6; \-;f<%+
public final static int MERGE = 7; J({D~
public final static int IMPROVED_MERGE = 8; GK'p$`oJm
public final static int HEAP = 9; -2J37
OmBz'sp:
public static void sort(int[] data) { ~,1Sw7rE
sort(data, IMPROVED_QUICK); U6@c)_* <
} ;]=w6'dP!
private static String[] name={ jUA~}DVD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MU a[}?
}; }p2iF2g9`
KU` *LB:
private static Sort[] impl=new Sort[]{ }5oI` 9VT
new InsertSort(), 4{zy)GE|W
new BubbleSort(), >rEZ$h
new SelectionSort(), 4y7_P0}:B
new ShellSort(), #lvt4a"P"
new QuickSort(), Z@+nkTJ9&t
new ImprovedQuickSort(), 65~E<)UJ
new MergeSort(), N?vb^?
new ImprovedMergeSort(), ,k4pW&A
new HeapSort() g_syGQ\
}; BK%B[f*[OA
\/3(>g?4
public static String toString(int algorithm){ BM /FOY;
return name[algorithm-1]; pK3A/ry<
} aHW34e@ebL
Ju47}t%HB
public static void sort(int[] data, int algorithm) { 63u%=-T%a
impl[algorithm-1].sort(data); |@JTSz*Or
} -GPBX?
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public static interface Sort { gp`@dn';
public void sort(int[] data); ftPps-
} ^ l]!'"
mv8H:T
public static void swap(int[] data, int i, int j) { SQcic]Ep
int temp = data; L4/ns@e
data = data[j]; F:ycV~bE
data[j] = temp; =figat
} :Pdh##k
} z U[pn)pe