[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; mhOgv\?
} Ud2Tn*QmI
int i1=l; -j2y#aP
int i2=mid+1; Ml;` *;
for(int cur=l;cur<=r;cur++){ ?=^\kXc[
if(i1==mid+1) q9PjQ%
data[cur]=temp[i2++]; w(z=xO
else if(i2>r) (+cZP&o
data[cur]=temp[i1++]; NZ0?0*
else if(temp[i1] data[cur]=temp[i1++]; \t/0Yh-'
else e*}GQ
data[cur]=temp[i2++]; W'f"kM
} hF5T9^8
} !*HJBZ]q
NQ;$V:s)
} <2]D3,.g.
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改进后的归并排序: R*FDg;t4
OB\ZT@l
package org.rut.util.algorithm.support; ]h&1|j1
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import org.rut.util.algorithm.SortUtil; kM1N4N7
Cz$q"U
/** $-~"G,;F
* @author treeroot ,nCvA%B!
* @since 2006-2-2 CWRB/WH:
* @version 1.0 W}2!~ep!
*/ H~mp*S
public class ImprovedMergeSort implements SortUtil.Sort { [~RO9=;L
E/wxX#]\
private static final int THRESHOLD = 10; FC6~V6R
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/* V82I%gPF
* (non-Javadoc) R".$x{{
* =$L+J O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cDzb}W*UM
*/ =J]EVD
public void sort(int[] data) { *}';q`u}
int[] temp=new int[data.length]; ZZHzC+O#^
mergeSort(data,temp,0,data.length-1); Iz'Et'w8!
} z}.6yHS
Rm79mh9
private void mergeSort(int[] data, int[] temp, int l, int r) { a j$& 9][
int i, j, k; ?*yB&(a:8
int mid = (l + r) / 2; aI;$N|]u
if (l == r) ^,t@HN;gA
return; 6>;OVX
if ((mid - l) >= THRESHOLD) 0!KYi_3
mergeSort(data, temp, l, mid); W,[QK~
else zxIP-QaA
insertSort(data, l, mid - l + 1); Y*p<\{,oC
if ((r - mid) > THRESHOLD) U6*[}Ww
mergeSort(data, temp, mid + 1, r); ' (XB|5
else e57R6g)4
insertSort(data, mid + 1, r - mid); <|?)^;R5!
]W4{|%@H"
for (i = l; i <= mid; i++) { }{=}^c"t'
temp = data; bJ1Nf|3~E
} TXXG0 G
for (j = 1; j <= r - mid; j++) { {fHY[8su0
temp[r - j + 1] = data[j + mid]; )bL(\~0g~
} n-],!pL^
int a = temp[l]; yzT1Zg_ER
int b = temp[r]; 2kDv (".
for (i = l, j = r, k = l; k <= r; k++) { -K(d]-yv
if (a < b) { Zlh 2qq
data[k] = temp[i++]; D)DD6
a = temp; S@S4<R1{\
} else { ys>n%24qP
data[k] = temp[j--]; 'UxI-Lt
b = temp[j]; /Z!$bD
} 5/i/. 0?n
} w0Ex}
} ~Dz:n]Vk/
jF j'6LT9/
/** X am8h
* @param data `H>&dK|/
* @param l p8@8b "
* @param i <uJ {>~
*/ }!>\Ja<\
private void insertSort(int[] data, int start, int len) { g-_=$#&{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oYA"8ei=
} g\8B;
} 5}Ge
} ^ <`SUBI
} vV$^`WY4
TOKt{`2}
堆排序： _e;bB?S
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package org.rut.util.algorithm.support; p-)@#hE
pX*E(Q)@!
import org.rut.util.algorithm.SortUtil; 3D!7,@&>3
~n) |
/** GD d'{qE6
* @author treeroot |6DJ5VFzD
* @since 2006-2-2 , %8)I("
* @version 1.0 p{W Amly
*/ yufw}Lo-
public class HeapSort implements SortUtil.Sort{ +J;b3UE#
qC"`i}7
/* (non-Javadoc) T,uF^%$@AQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bma.RCyY<
*/ 3+d^Bpp4
public void sort(int[] data) { P]y{3y:XxM
MaxHeap h=new MaxHeap(); <YEKbnw$o
h.init(data); O-)[!8r
for(int i=0;i h.remove(); wb(S7OsMO
System.arraycopy(h.queue,1,data,0,data.length); s_RK x)w@
} dhxzW@'nIL
}~PG]A
private static class MaxHeap{ `v)'(R7){
&8Vh3QLEx
void init(int[] data){ R@NFpiw
this.queue=new int[data.length+1]; D]aQt%TL
for(int i=0;i queue[++size]=data; |Z2_W/
fixUp(size); `8O Bw
} [A{o"zY
} s5+;8u9K
oQV3
private int size=0; ,30lu a
vO~w~u5
private int[] queue; RrCG(Bh
IBeorDIZ
public int get() { YcwDNsk
return queue[1]; 9W\"A$;+&
} T+EwC)Ll
0<uLQVoR2n
public void remove() { pM+9K:^B
SortUtil.swap(queue,1,size--); =-/'$7R,
fixDown(1); qN' 3{jiPL
} H Q[
file://fixdown <oT1&C{
private void fixDown(int k) { B6TE9IoSb8
int j; 5{+2#-
while ((j = k << 1) <= size) { }:{ @nP
if (j < size %26amp;%26amp; queue[j] j++; YT'V/8US
if (queue[k]>queue[j]) file://不用交换 qrj f
break; e1JHN
SortUtil.swap(queue,j,k); lg2I|Z6DH
k = j; [\<#iRcP
} 8au Gz ,"
} mOHOv61
private void fixUp(int k) { pCo3%(
while (k > 1) { 6'e^np
int j = k >> 1; /AOGn?Z3
if (queue[j]>queue[k]) 'm|T"Ym~
break; bo<.pK$
SortUtil.swap(queue,j,k); IgwHC0W
k = j; !s/qqq:g
} Qnt}:M+
} ntPj9#lf
o@dTiQK_
} J1cz D|(
u*5}c7)uId
} 4|5;nxkGm8
)eZ}Kt+
SortUtil： _w%:PnO
??P\v0E
package org.rut.util.algorithm; 4ME$Z>eN
<*^|Aj|#
import org.rut.util.algorithm.support.BubbleSort; kb"Fw:0
import org.rut.util.algorithm.support.HeapSort; q27q/q8
import org.rut.util.algorithm.support.ImprovedMergeSort; `EvO^L
import org.rut.util.algorithm.support.ImprovedQuickSort; LD NdHG6
import org.rut.util.algorithm.support.InsertSort; eAI|zk6
import org.rut.util.algorithm.support.MergeSort; N TDmOS\,
import org.rut.util.algorithm.support.QuickSort; _yH">x<
import org.rut.util.algorithm.support.SelectionSort; =?+w5oI0
import org.rut.util.algorithm.support.ShellSort; 'WmjQsf
NKB["+S<
/** lqh:c
* @author treeroot B=^M& {
* @since 2006-2-2 n{~&^Nby*I
* @version 1.0 {jR3D!hK
*/ jr.{M
public class SortUtil { d_&pxy? >
public final static int INSERT = 1; o+{i26%
public final static int BUBBLE = 2; '~f*O0_
public final static int SELECTION = 3; Ei+lVLoC
public final static int SHELL = 4; ht6}v<x.eA
public final static int QUICK = 5; 6(htpT%J
public final static int IMPROVED_QUICK = 6; CKe72OC
public final static int MERGE = 7; gp 11/.
public final static int IMPROVED_MERGE = 8; Q7F4OS5b
public final static int HEAP = 9; HGh)d` 8
nSQ]qH&4d
public static void sort(int[] data) { Q"eqql<h#
sort(data, IMPROVED_QUICK); >c Tt2v
} JgP%4)]LV
private static String[] name={ Kx,X{$Pe
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?z-nY,'^uq
}; |Thm5,ao
lB/^
private static Sort[] impl=new Sort[]{ ;*FY+jM
new InsertSort(), |9$C%@8
new BubbleSort(), -"2 t^Q
new SelectionSort(), %" mki>
new ShellSort(), lWJYT<kt
new QuickSort(), x30|0EHYl[
new ImprovedQuickSort(), A0;{$/
new MergeSort(), fU%Ys9:wU
new ImprovedMergeSort(), };"_Ku4#-
new HeapSort() QZ7W:%r(4
}; Xa;wx3]t
"7Kw]8mRR
public static String toString(int algorithm){ &"T7KXx
return name[algorithm-1]; IIXA)b!
} &,Loqr
[J eq ?X9
public static void sort(int[] data, int algorithm) { 5S&Qj7kr
impl[algorithm-1].sort(data); yLXIjR
} 32anmVnf
P92pQ_W
public static interface Sort { ('BB9#\t
public void sort(int[] data); ]w]BKpU=
} F2Ny=H&G
O5+Ah%
public static void swap(int[] data, int i, int j) { }z\t}lven
int temp = data; ' Gx\
data = data[j]; *M:p[.=1
data[j] = temp; !{(crfXB
} QFhyidm=]
} u|"YS-dH