[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; r\Yh'cRW{
} KLE)+|
int i1=l; \iP@|ay9
int i2=mid+1; c %Cbq0+2
for(int cur=l;cur<=r;cur++){ HEIg_6sb
if(i1==mid+1) Xtz:^tg
data[cur]=temp[i2++]; \g h |G
else if(i2>r) _L$a[zH
data[cur]=temp[i1++]; 2CneRKQy
else if(temp[i1] data[cur]=temp[i1++]; <c:H u{D
else o)^Wz
data[cur]=temp[i2++]; jX(hBnGW
} T?1V%!a;f
} k+w Ji
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} w>=N~0@t
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改进后的归并排序: .R'M'a#*!A
hqmE]hwc
package org.rut.util.algorithm.support; `[U.BVP'
#8yo9g6
import org.rut.util.algorithm.SortUtil; Jp+'"a
]sk=V.GGQ
/** 5g/,VMe
* @author treeroot Lhe&
* @since 2006-2-2 {uoF5|O6K
* @version 1.0 s.Ai_D
*/ x\8|A
public class ImprovedMergeSort implements SortUtil.Sort { 3}F>t{FDk
El;"7Qn
private static final int THRESHOLD = 10; <r$h =hM
tqCkqmyC
/* ' BS.:^
* (non-Javadoc) (;%T]?<9#
* @z{SDM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZH9Fs'c=
*/ J{Kw@_ypP
public void sort(int[] data) { b \ln XN
int[] temp=new int[data.length]; ?4Rd4sIM$u
mergeSort(data,temp,0,data.length-1); =CZRX' +yN
} qqf*g=f
*Q/^ib9=
private void mergeSort(int[] data, int[] temp, int l, int r) { o5NmNOXm
int i, j, k; :Ev gUA\4
int mid = (l + r) / 2; hpb|| V
if (l == r) J~3m7
return; t^FE]$,
if ((mid - l) >= THRESHOLD) fx[&"$X
mergeSort(data, temp, l, mid); 1BZ##xV*:G
else Ui`{U
insertSort(data, l, mid - l + 1); 10*Tk 8
if ((r - mid) > THRESHOLD) XGH:'^o_
mergeSort(data, temp, mid + 1, r); #X?[")R
else jYRSV7d
insertSort(data, mid + 1, r - mid); f!w/zC .
C8> i{XOO,
for (i = l; i <= mid; i++) { jS##zC
temp = data; A@)Q-V8*9s
} ['.])
for (j = 1; j <= r - mid; j++) { 1ruI++P
temp[r - j + 1] = data[j + mid]; "g&f:[a/
} i#t-p\Tcz
int a = temp[l]; )Ak#1w&q
int b = temp[r]; Babzrt-
for (i = l, j = r, k = l; k <= r; k++) { n+ebi>}P
if (a < b) { ^Z?m)qxvB
data[k] = temp[i++]; C|TQf8
a = temp; >Wt@O\k
} else { 9$;5J
data[k] = temp[j--]; m1Ya
b = temp[j]; `?(J(H
} &l1t5 !
} fI<LxU_n:
} O8A1200
f(D'qV T{
/** uH%b rbrU
* @param data RBn/7
* @param l h]ae^M
* @param i L,y q=%h|
*/ 8xgBNQdPT
private void insertSort(int[] data, int start, int len) { jc Mn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o?>0WSLlm
} ]$r]GVeN}H
} yVmp,""a
} aO&{.DO2
} A_wf_.l4h
Yz_}*
堆排序： x-CjxU3
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package org.rut.util.algorithm.support; yj4"eDg]
l!88|~
import org.rut.util.algorithm.SortUtil; u0&R*YV
9d#?,:JG
/** >*ls} q^
* @author treeroot .eD&UQ
* @since 2006-2-2 I!*P' {lh
* @version 1.0 A&t8C8,
*/ Yp;Z+!!UZ
public class HeapSort implements SortUtil.Sort{ J4::.r
y,x 2f%x
/* (non-Javadoc) MLHCBRi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8p%0d`sX
*/ K $- *
public void sort(int[] data) { IeYNTk&<
MaxHeap h=new MaxHeap(); e&VC}%m
h.init(data); l%"DeRp,/
for(int i=0;i h.remove(); hHJvLs>^
System.arraycopy(h.queue,1,data,0,data.length); k4LrUd
} Rh^@1{yr
n!/0yR2S
private static class MaxHeap{ Bam.B6-
pJ/]\>#5
void init(int[] data){ qr%N/7
this.queue=new int[data.length+1]; {L7Pha
for(int i=0;i queue[++size]=data; > UZ-['H
fixUp(size); k}fC58q
} Tty'ysH
} yO)xN=o^\
) ~=pt&+
private int size=0; B1 }-
/'jX_ V_$|
private int[] queue; + m-88
#ay/VlD@
public int get() { yl~;!
return queue[1]; _D{A`z
} erEB4q+ #O
#U`AK9rP_g
public void remove() { 1*hEbO
SortUtil.swap(queue,1,size--); $TXiWW+
fixDown(1); -z`FKej
} Pq [_(Nt
file://fixdown $lT8M-yK\
private void fixDown(int k) { 2.%)OC!q&5
int j; tJ;qZyy(
while ((j = k << 1) <= size) { zni9
if (j < size %26amp;%26amp; queue[j] j++; pV ^+X}
if (queue[k]>queue[j]) file://不用交换 ZMgsuzg
break; 5`p9Xo>)yW
SortUtil.swap(queue,j,k); yR>P
k = j; j_sos%-
} g]vB\5uA:
} K{DC{yLu
private void fixUp(int k) { N=1ue`i
while (k > 1) { ZEI)U, I.
int j = k >> 1; C5dM`_3L
if (queue[j]>queue[k]) c%pf,sm'
break; $~FZJ@qa
SortUtil.swap(queue,j,k); rt*x[5<
k = j; 88_ef7w
} Bu=1-8@=qs
} iuY,E
xS1n,gTA
} " 7^nRJy
-z`%x@F<&L
} qF~9:`
<)T| HKx
SortUtil： ?3BcjD0
o@L0ET
package org.rut.util.algorithm; n3~axRPO
GoybkwFjZ
import org.rut.util.algorithm.support.BubbleSort; w~6UOA8}
import org.rut.util.algorithm.support.HeapSort; g0zzDv7~
import org.rut.util.algorithm.support.ImprovedMergeSort; Mrrpm%Y
import org.rut.util.algorithm.support.ImprovedQuickSort; >IaGa!4
import org.rut.util.algorithm.support.InsertSort; oIick
import org.rut.util.algorithm.support.MergeSort; BQPmo1B
import org.rut.util.algorithm.support.QuickSort; gaz7u8$A=
import org.rut.util.algorithm.support.SelectionSort; }2;P`s
import org.rut.util.algorithm.support.ShellSort; b69nj
G"FO%3&|
/** O+o)z6(
* @author treeroot FM6{%}4
* @since 2006-2-2 95'+8*YCY
* @version 1.0 {`SMxDevc}
*/ : b`N(]
public class SortUtil { &q<k0_5Q
public final static int INSERT = 1; M99ku'
public final static int BUBBLE = 2; 6m?<"y8]
public final static int SELECTION = 3; ~4~r
public final static int SHELL = 4; *?t$Q|2Xr
public final static int QUICK = 5; Am*IC?@tq
public final static int IMPROVED_QUICK = 6; [+D]!&P
public final static int MERGE = 7; <w^u^)iLy1
public final static int IMPROVED_MERGE = 8; 9o>D Uc
public final static int HEAP = 9; yx|iZhK0:}
y-E'Y=j
public static void sort(int[] data) { QO =5Q
sort(data, IMPROVED_QUICK); ^ l#6Es
} rB".!b
private static String[] name={ ~o_JZ:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L-`V^{R]
}; lW|=rq-|
x,mt}>
private static Sort[] impl=new Sort[]{ -6DRX
new InsertSort(), `$> Y
new BubbleSort(), cS%dTrfo
new SelectionSort(), <?B3^z$
new ShellSort(), hdw.S`~}%
new QuickSort(), #l}Fk)dj
new ImprovedQuickSort(), ljK?2z>
new MergeSort(), `]W9Fj<1j
new ImprovedMergeSort(), :-jbIpj'
new HeapSort() qj~=qV0p
}; OS#aYER~/
>G|RVB
public static String toString(int algorithm){ B$rhsK%
return name[algorithm-1]; x"q]~u<rB
} H-pf8
K^<?LXJF
public static void sort(int[] data, int algorithm) { H[.)&7M\
impl[algorithm-1].sort(data); cV6H!\
} b, a7XANsh
129\H< m
public static interface Sort { .Qrpz^wdt
public void sort(int[] data); 3;L$&X2
} z"mVE T
\ 86g y/
public static void swap(int[] data, int i, int j) { OD~Q|I(j
int temp = data; t4UK~ {gh
data = data[j]; HY5R
data[j] = temp; }o:LwxNO
} "mBM<rEn*
} "T=j\/Q