[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; ]q"y P0
} 7{l~\]6d
int i1=l; C4GkFD
int i2=mid+1; r i)`e
for(int cur=l;cur<=r;cur++){ Ms5R7<O.7
if(i1==mid+1) # 2FrP5rC
data[cur]=temp[i2++]; 0fLd7*1>
else if(i2>r) -knP5"TB
data[cur]=temp[i1++]; CMyz!jZ3
else if(temp[i1] data[cur]=temp[i1++]; K"hnGYt?
else 4'tY1d
data[cur]=temp[i2++]; ]omBq<ox'Y
} HGDiwA
} G*,7pc
jtq^((Ux
} M`8c|*G
hd,O/-m#
改进后的归并排序: 4CtWEq
yu@Pd3
package org.rut.util.algorithm.support; `~_H\_JpO
~]`U)Aw
import org.rut.util.algorithm.SortUtil; d(:I~m
m>3\1`ZF~<
/** (Q&O'ng1
* @author treeroot @6%7X7m
* @since 2006-2-2 <>Ha<4A =E
* @version 1.0 N7KG_o%
*/ ^N7 C/" p
public class ImprovedMergeSort implements SortUtil.Sort { P!IXcPKW53
2aX{r/Lc
private static final int THRESHOLD = 10; )=bW\=[8
(^B=>
/* ]rNxvFN*j
* (non-Javadoc) lgD%
* t@a&&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :t;i2Ck
*/ th<>%e}5c
public void sort(int[] data) { Oqt{ uTI~
int[] temp=new int[data.length]; d(@ ov^e-
mergeSort(data,temp,0,data.length-1); +JM@kdE5b
} f*IvaY
1~},}S]id
private void mergeSort(int[] data, int[] temp, int l, int r) { OF)*kiJ
int i, j, k; [Q\(kd*4
int mid = (l + r) / 2; 3xmPY.
if (l == r) D #7q3s
return; P2 qC[1hYH
if ((mid - l) >= THRESHOLD) *cCj*Zr]
mergeSort(data, temp, l, mid); kY6_n4
else 'cAS>s"$}V
insertSort(data, l, mid - l + 1); ;j[:tt\k
if ((r - mid) > THRESHOLD) 5R%y3::$S
mergeSort(data, temp, mid + 1, r); +EqL|
else 0%Y}CDn_
insertSort(data, mid + 1, r - mid); }f% Qk0^
lDF7~N9J_
for (i = l; i <= mid; i++) { g:!R't?
temp = data; e\f\CMb
} &Vu-*?
for (j = 1; j <= r - mid; j++) { PfB9 .f{
temp[r - j + 1] = data[j + mid]; *~*"p)`<
} |5&7;;$
int a = temp[l]; tfh`gUV4
int b = temp[r]; 8rFP*K9
for (i = l, j = r, k = l; k <= r; k++) { }n#$p{e$i
if (a < b) { =Zsxl]h
data[k] = temp[i++]; e**'[3Y
a = temp; *65~qAd
} else { ( z F_<
data[k] = temp[j--]; \hb$v
b = temp[j]; Ts|;5ya5m
} [-81s!#mkw
} W^S]"N0u
} &&m1_K
)K`tnb.Pf
/** Pj_DI)^
* @param data MZh?MaBz06
* @param l SQ]M"&\{y
* @param i i70\`6*;B
*/ ]2ycJ >w
private void insertSort(int[] data, int start, int len) { kA)`i`gt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #XqiXM~^R
} y@7CY-1
} OsVz[wN
} 9C7HL;MF
} (:%t
)vg@Kc26
堆排序： PlT_]p
~r'ApeI9
package org.rut.util.algorithm.support; ='C;^ Bk
@`Dh7Q
import org.rut.util.algorithm.SortUtil; Uyeo0B"
wuXH'
/** %da-/[
* @author treeroot zwP*7u$CH
* @since 2006-2-2 \%%M>4c
* @version 1.0 ;XlCd[J<
*/ Ex@}x#3
public class HeapSort implements SortUtil.Sort{ qK~]au:C
|z&7KoYK'
/* (non-Javadoc) ER@RWV2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *P5/S8c
*/ {a9.0N:4
public void sort(int[] data) { ~ahu{A4Bw
MaxHeap h=new MaxHeap(); CyB4apJ
h.init(data); <1:I[b
for(int i=0;i h.remove(); {i3=N{5b
System.arraycopy(h.queue,1,data,0,data.length); ] \!,yiVeU
} #e[r0f?U
,9ew75Jl
private static class MaxHeap{ E @Rb+8},"
* kUb[
void init(int[] data){ e eyZ$n
this.queue=new int[data.length+1]; y&\t72C$Fi
for(int i=0;i queue[++size]=data; S&k/Pc
fixUp(size); ~DB:/VSmu
} wAzaxeV=
} jIHY[yDT
jZvIqR/
private int size=0; se}$/Y}t
6Bexwf<u
private int[] queue; \yLFV9P}EL
]gF=I5jn]
public int get() { D5].^*AbZ
return queue[1]; ~XvMiWuo
} "-AFWWKtx
g:p`.KuB
public void remove() { *KU:D Y{
SortUtil.swap(queue,1,size--); }*aj&
fixDown(1); G Uh<AG*+
} V%C'@m(/SZ
file://fixdown >fkV65w{*
private void fixDown(int k) { %zDi|WZ
int j; -yu$Mm
while ((j = k << 1) <= size) { k)8*d{*
if (j < size %26amp;%26amp; queue[j] j++; hAP2DeT$
if (queue[k]>queue[j]) file://不用交换 6{g&9~V
break; D4$"02"
SortUtil.swap(queue,j,k); WU.eeiX
k = j; l <Z7bo
} r&:yZN
} :6m"}8*q8
private void fixUp(int k) { AI,E9
while (k > 1) { 300[2}Y]
int j = k >> 1; 9+.3GRt7
if (queue[j]>queue[k]) /c4$m3?]
break; p!<PRms@
SortUtil.swap(queue,j,k); )oM% N
k = j; uaCI2I
} c]qh)F$s8
} :3J`+V}9;
]XL=S|tIq
} qNMYZ0,
$?LegX
} oJ#;XR
tn(6T^u
SortUtil： lYr4gFOs
e"p){)*$
package org.rut.util.algorithm; ec*Ni|`Z'
t~qAA\p}o
import org.rut.util.algorithm.support.BubbleSort; IEI&PRD
import org.rut.util.algorithm.support.HeapSort; C*t0`3g d
import org.rut.util.algorithm.support.ImprovedMergeSort; ~4] J'E >
import org.rut.util.algorithm.support.ImprovedQuickSort; <Skf n`).
import org.rut.util.algorithm.support.InsertSort; xf|C{XV@H
import org.rut.util.algorithm.support.MergeSort; -KG1"g,2
import org.rut.util.algorithm.support.QuickSort; gh `_{l
import org.rut.util.algorithm.support.SelectionSort; ofgNL .u
import org.rut.util.algorithm.support.ShellSort; Y 7?q`
o0dD
/** (&_^1
* @author treeroot {7 ](-
* @since 2006-2-2 g"g3|$#Ej|
* @version 1.0 whGtVx|zR
*/ SK*<H~2
public class SortUtil { P$@:T[}v
public final static int INSERT = 1; 3q6FV7Fv&b
public final static int BUBBLE = 2; >rYMOC~
public final static int SELECTION = 3; f Avh!g
public final static int SHELL = 4; _BCq9/
public final static int QUICK = 5; y"K[#&,0
public final static int IMPROVED_QUICK = 6; yD0DPtti
public final static int MERGE = 7; 'c >^Aai
public final static int IMPROVED_MERGE = 8; zqRps8=
public final static int HEAP = 9; ^ 7)H;$
Z]Cd>u
public static void sort(int[] data) { IL?"g{w
sort(data, IMPROVED_QUICK); *fLVzYpo
} azRp4~2?
private static String[] name={ S]4!uv^y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N,F[x0&?
}; 5UG"i_TC
(tiE%nF+
private static Sort[] impl=new Sort[]{ 6.|[;>Km
new InsertSort(), uE..1N&*
new BubbleSort(), NZ+TTMv
new SelectionSort(), "od2i\
new ShellSort(), =t|,6Vp
new QuickSort(), 7dR]$~+*e
new ImprovedQuickSort(), ' wp _U/
new MergeSort(), w.+G+r=
new ImprovedMergeSort(), LF+E5{=:R
new HeapSort() '+*'sQvH[
}; c;n\HYk
Lg-!,Y
public static String toString(int algorithm){ Odw9]`,T
return name[algorithm-1]; Pv*]AF;9pQ
} O6">Io5
X2YBZA
public static void sort(int[] data, int algorithm) { A3J=,aRI_v
impl[algorithm-1].sort(data); )vY)Mg
} / w[Tu
yEkwdx5!(
public static interface Sort { ^pqJz^PO.
public void sort(int[] data); Q4g69IE
} Y+0GJuBf
hANe$10=H
public static void swap(int[] data, int i, int j) { vVjk9_Ul
int temp = data; SXNde@% {
data = data[j]; 74c5\UxA
data[j] = temp; xE*.,:,&
} 5d-rF:#
} oS<*\!&D