[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; /N[o[q
} Ed&,[rC
int i1=l; Na 9l#
int i2=mid+1; $ lsRg:J
for(int cur=l;cur<=r;cur++){ HvgK_'
if(i1==mid+1) zHoO?tGf
data[cur]=temp[i2++]; {iIg 4PzrU
else if(i2>r) 7! b)'W?
data[cur]=temp[i1++]; $F@L$&~
else if(temp[i1] data[cur]=temp[i1++]; B,vHn2W
else JNM@Q
data[cur]=temp[i2++]; 76_8e{zbr
} }RN=9J
} MZMS?}.2
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} .H(}[eG_
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改进后的归并排序: 1Q&WoJLfR
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package org.rut.util.algorithm.support; {`Fx~w;i
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import org.rut.util.algorithm.SortUtil; U??f<
4`!
/** ]i,Mq
* @author treeroot 9HNh*Gc=
* @since 2006-2-2 fyg~KF}
* @version 1.0 &pMlt7
*/ ??zABV
public class ImprovedMergeSort implements SortUtil.Sort { )-9w3W1r
Pvg
private static final int THRESHOLD = 10; Ro'4/{}+
^I'Lw
/* )>/j&>%
* (non-Javadoc) ^tg6JB;s
* !: EW21m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lQ<#jxp
*/ tU)r[2H2
public void sort(int[] data) { }OP%p/eY
int[] temp=new int[data.length]; WrHgF*[
mergeSort(data,temp,0,data.length-1); i_9Cc$Qh<
} 9B#)h)h(=
g=oeS%>E
private void mergeSort(int[] data, int[] temp, int l, int r) { 76IALJ00V
int i, j, k; yNqm]H3<MP
int mid = (l + r) / 2; DNm7z[t{
if (l == r) R(/[NvUb
return; Jp.3KA>
if ((mid - l) >= THRESHOLD) >xU72l#5
mergeSort(data, temp, l, mid); -@ UN]K
else k;K> ,$F
insertSort(data, l, mid - l + 1); K.#,O+-Kg`
if ((r - mid) > THRESHOLD) /UaNYv/
mergeSort(data, temp, mid + 1, r); C6D=>%uY
else liCCc;&B;
insertSort(data, mid + 1, r - mid); RQ*|+~H
!4 4mT'Y
for (i = l; i <= mid; i++) { 7SA-OFM
temp = data; TRySl5jx@
} :_fjml/
for (j = 1; j <= r - mid; j++) { p;n3`aVh
temp[r - j + 1] = data[j + mid]; XC7Ty'#"KX
} n $O.>
int a = temp[l]; +9 16ZPk
int b = temp[r]; qUEd E`B
for (i = l, j = r, k = l; k <= r; k++) { 9N*S-Po=
if (a < b) { ^:cb $9F
data[k] = temp[i++]; o&hKg#nO83
a = temp; *3.yumcv{L
} else { Z/NGv
data[k] = temp[j--]; 1C}pv{0:&
b = temp[j]; A"\P&kqMV
} f74%YY
} tyn?o
} qL%.5OCn(
c#\ah}]Vo
/** oRT
* @param data h7de9Rt
* @param l nCffBc
* @param i e8XM=$@
*/ y(/jTS/hd
private void insertSort(int[] data, int start, int len) { kO..~@aY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JK(`6qB>(6
} ^Hz
} h\D_
} &prdlh=UE
} t`<}UWAH+
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堆排序： zqekkR]
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package org.rut.util.algorithm.support; P<cMP)+K
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import org.rut.util.algorithm.SortUtil; 5T$9'5V7
0\\ueMj
/** {2}tPT[a(
* @author treeroot Tsm)&$JI8
* @since 2006-2-2 [|:QE~U@
* @version 1.0 ~8H&m,{j
*/ 1R'u v4e
public class HeapSort implements SortUtil.Sort{ 3:]{(@J
PZ
/* (non-Javadoc) )XmCy"xx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AkYupP2]v
*/ klK-,J
public void sort(int[] data) { ot|N;=ZKo
MaxHeap h=new MaxHeap(); MO));M)
h.init(data); vHs>ba$"
for(int i=0;i h.remove(); 0%;N9\
System.arraycopy(h.queue,1,data,0,data.length); Cbgj@4H
} F:[7^GQZ{
ou<S)_|Iu
private static class MaxHeap{ )CC?vV
5`4}A%@&
void init(int[] data){ kP!%|&w;
this.queue=new int[data.length+1]; Tm%$J
for(int i=0;i queue[++size]=data; fs2mN1
fixUp(size); XPHQAo[(s
} r.^0!(d
} PtQQZ"ept
1KeJd&e
private int size=0; egZyng pB
V;>9&'Z3
private int[] queue; JwN}Jm
#d}0}7ue
public int get() { 4o1Q7
return queue[1]; :0 W6uFNOU
} >:w?qEaE
jgk{'_ j
public void remove() { `FZ(#GDF
SortUtil.swap(queue,1,size--); K)<Wm,tON
fixDown(1); MxM](ew~7
} dIoF~8V
file://fixdown ]%gp?9wy
private void fixDown(int k) { a(PjcQ4dY
int j; ePV-yy
while ((j = k << 1) <= size) { ?60>'Xjj
if (j < size %26amp;%26amp; queue[j] j++; ,bB( 24LD
if (queue[k]>queue[j]) file://不用交换 Si#"Wn?|
break; o\_ Td
SortUtil.swap(queue,j,k); X4d Xm>*?=
k = j; Pk$}%;@v
} W0VA'W
} D3<IuWeM
private void fixUp(int k) { >}ro[x`K
while (k > 1) { 9b?i G
int j = k >> 1; [Xxw]C6\>(
if (queue[j]>queue[k]) I["F+kt^^
break; e(?:g@]-r
SortUtil.swap(queue,j,k); 6?53q e
k = j; GLo\q:5A
} BhqhyX\D&y
} sFbfFUd
$a`J(I
} z[WC7hvU
fm3(70F\
} J)-T:.i|0
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SortUtil： .i MnWW
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package org.rut.util.algorithm; Bj;\mUsk
}*?yHJ3
import org.rut.util.algorithm.support.BubbleSort; Lf5%M|o.)
import org.rut.util.algorithm.support.HeapSort; nVz5V%a!\q
import org.rut.util.algorithm.support.ImprovedMergeSort; \9046An
import org.rut.util.algorithm.support.ImprovedQuickSort; m,\i
import org.rut.util.algorithm.support.InsertSort; x^zdTMNhw
import org.rut.util.algorithm.support.MergeSort; I)[`ZVAXR
import org.rut.util.algorithm.support.QuickSort; IO}+[%ptc*
import org.rut.util.algorithm.support.SelectionSort; ;l$9gD>R
import org.rut.util.algorithm.support.ShellSort; n"(7dl?
BmJkt3j."
/** ZrFr`L5F;
* @author treeroot Bx+d3
* @since 2006-2-2 pgCd
* @version 1.0 A ?#]s
*/ #.~ga7Q
public class SortUtil { lo"j )Zt
public final static int INSERT = 1; L30>|g
public final static int BUBBLE = 2; 2>\b:
public final static int SELECTION = 3; pNP_f:A|
public final static int SHELL = 4; {d| |q<.-
public final static int QUICK = 5; %,33gZzf
public final static int IMPROVED_QUICK = 6; E|Q{]&$;Z"
public final static int MERGE = 7; S <2}8D
public final static int IMPROVED_MERGE = 8; AnRlH
public final static int HEAP = 9; _o\>V:IZ
- o4@#p>>
public static void sort(int[] data) { \^Ep>Pq`]
sort(data, IMPROVED_QUICK); 9X!ET!
} h8em\<;
private static String[] name={ [.{^"<Z<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a@Mq J=<L
}; B,4q>KQA
(RExV?:
private static Sort[] impl=new Sort[]{ Kl2}o|b
new InsertSort(), #>BX/O*D
new BubbleSort(), $+7ci~gs
new SelectionSort(), *U M!(
new ShellSort(), YdK_.t0Mu
new QuickSort(), T0;u+$
new ImprovedQuickSort(), FX7M4t#<
new MergeSort(), >J.Qm0TY(
new ImprovedMergeSort(), |Mt&p#y
new HeapSort() \xF;{}v
}; {z=j_;<]
Ah*wQow
public static String toString(int algorithm){ w %;hl#s
return name[algorithm-1]; yDzdE;
} S)+CTVVE
tL1P<1j_
public static void sort(int[] data, int algorithm) { vuXS/ d
impl[algorithm-1].sort(data); HF]EU!OT
} j]>=1Rd0b(
>o#ERNf
public static interface Sort { h(_P9E[g
public void sort(int[] data); \WcB9
} ,`yyR:F
4b]_ #7Qm
public static void swap(int[] data, int i, int j) { Yhe+u\vGs\
int temp = data; "2%>M
data = data[j]; sA3UeTf
data[j] = temp; k'g$2
} p<q].^M
} AfN&n= d K