[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; YA8~O5
} ^aMdbB
int i1=l; H(m+rk
int i2=mid+1; y=`(`|YW}`
for(int cur=l;cur<=r;cur++){ a VMFjkW
if(i1==mid+1) &g {_.n,
data[cur]=temp[i2++]; _QCI<|A
else if(i2>r) 00TdX|V`
data[cur]=temp[i1++]; Wuz~$SU
else if(temp[i1] data[cur]=temp[i1++]; _L.yt5_
else "xI[4~'`:
data[cur]=temp[i2++]; Mb!^_cS(
} "|rqt.f2[
} 1\kehCt
TR20{8"
} 4Fq}*QJ-
%q^]./3p
改进后的归并排序: *RM'0[1F4
CB1u_E_
package org.rut.util.algorithm.support; B/}>UHM
:Aw VeX@
import org.rut.util.algorithm.SortUtil; *@^0xz{\z
VV0$L=mo
/** [l:.Q?? )|
* @author treeroot A@r,A?(
* @since 2006-2-2 ]={Hq9d@
* @version 1.0 z(qz(`eGC&
*/ 1doqznO
public class ImprovedMergeSort implements SortUtil.Sort { 470Pig>I8
IF1}}[Ht
private static final int THRESHOLD = 10; " cg>g/
ZxQP,Ys_Y
/* 6npwu5!
* (non-Javadoc) 79_MP
* rg\w!L(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `0F IJT
*/ 5"U7I{\
public void sort(int[] data) { @T"385>
int[] temp=new int[data.length]; AP%h!b5v
mergeSort(data,temp,0,data.length-1); 9`AQsZ2
} |Oe6OCPf
zAewE@N#_
private void mergeSort(int[] data, int[] temp, int l, int r) { It[~0?+
int i, j, k; 0'uj*Y{L
int mid = (l + r) / 2; ~m7+^c@,
if (l == r) 26A#X
return; ^E^:=Q?'_
if ((mid - l) >= THRESHOLD) yr?\YKV)I
mergeSort(data, temp, l, mid); szHUHW~;J
else S5JnJkNn
insertSort(data, l, mid - l + 1); @Klj!2cv$
if ((r - mid) > THRESHOLD) N<x5:f#+
mergeSort(data, temp, mid + 1, r); `0D+x
else #~b9H05D
insertSort(data, mid + 1, r - mid); aO1cd_d6x_
ryN-d%t?
for (i = l; i <= mid; i++) { PLD!BD
temp = data; <OUAppH
} >qCT#TY
for (j = 1; j <= r - mid; j++) { hjE9[{K
temp[r - j + 1] = data[j + mid]; dU,/!|.K
} 8Bhng;jX
int a = temp[l]; hf[K\aAk
int b = temp[r]; KGIz)/eSg
for (i = l, j = r, k = l; k <= r; k++) { m<E7cY3mX
if (a < b) { X^ovP'c2
data[k] = temp[i++]; Vr'Z5F*@
a = temp; 2rxdRg'YLQ
} else { HwHI$IB
data[k] = temp[j--]; MmX42;Pw
b = temp[j]; $jHL8r\e7
} rP'oUV_
} {PU[MHZF
} E^g6,Y:i9
n}l Z
/** t/3veDh@
* @param data <C&UDj
* @param l Ac|`5'/Tx
* @param i ' |4XyU=
*/ 3yTBkFI!
private void insertSort(int[] data, int start, int len) { E(TY%wO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .8"o&%$`V
} .N%$I6w
} IcA]<}0!"v
} TqWvHZX
} k2xjcrg
Iv{}U\ u
堆排序： iB\d`NUf
$lO\eQGxB
package org.rut.util.algorithm.support; pPIH`Iq
6:e0?R^aD"
import org.rut.util.algorithm.SortUtil; S`NH6?/uH
3,pRmdC
/** QPBf++|
* @author treeroot o}[wu:>yk
* @since 2006-2-2 blLX ncyD
* @version 1.0 y_\d[
*/ b7\nCRY
public class HeapSort implements SortUtil.Sort{ Q 5Ln'La$
WhkE&7Gk
/* (non-Javadoc) 3iY`kf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^f4qs
*/ %cBJ haR{(
public void sort(int[] data) { 6CCM7
MaxHeap h=new MaxHeap(); HbCM{A9
h.init(data); `LNRl'Zm
for(int i=0;i h.remove(); <}|+2f233+
System.arraycopy(h.queue,1,data,0,data.length); : G<1
} &Uzg&eB
P}cGWfj
private static class MaxHeap{ ).k=[@@V
vh((HS-)
void init(int[] data){ SV-pS>#
this.queue=new int[data.length+1]; `?~pk)<C].
for(int i=0;i queue[++size]=data; n`}vcVL;
fixUp(size); ~~>D=~B0'
} ^ng?+X>mP
} YrA#NTB_o
T'FRnC^~
private int size=0; $=t&NM
nd-y`@z
private int[] queue; {D$#m
"`16-g97
public int get() { =p$1v{L8
return queue[1]; Qb/qUUQO;0
} cu.f]'
vWwp'q
public void remove() { m\[r6t]V
SortUtil.swap(queue,1,size--); jeC3}BL}
fixDown(1); `5Q0U%`W
} sAWUtJ
file://fixdown _r&`[@m
private void fixDown(int k) { GoZr[=d
int j; v-EcJj%
while ((j = k << 1) <= size) { ?~hC.5
if (j < size %26amp;%26amp; queue[j] j++; cV=h8F
if (queue[k]>queue[j]) file://不用交换 !Mceg
break; F:1w%#6av
SortUtil.swap(queue,j,k); K'Wg_ihA
k = j; pvD\E
} V~%!-7?
} ?x=;?7
private void fixUp(int k) { Z-.`JkKd8
while (k > 1) { &V:iy
int j = k >> 1; RdRF~~R%
if (queue[j]>queue[k]) k9xfv@v}
break; rgJKXl;@s
SortUtil.swap(queue,j,k); 'WUd7
k = j; Hcq?7_)
} GMyzQ]@}
} Qk*`9
Gk g)\ 3
} '1_CMr
4[v %]g`
} =`Pgo5A
q ^Un,h64t
SortUtil： pa*bqPi
l03{ ezJk[
package org.rut.util.algorithm; gi#bU
h(l4\)
import org.rut.util.algorithm.support.BubbleSort; T%B&HsH
import org.rut.util.algorithm.support.HeapSort; e3oHe1"hP
import org.rut.util.algorithm.support.ImprovedMergeSort; slaYr`u
import org.rut.util.algorithm.support.ImprovedQuickSort; ZxFRE#y~2
import org.rut.util.algorithm.support.InsertSort; Nk*d=vj
import org.rut.util.algorithm.support.MergeSort; T{<riJ`O
import org.rut.util.algorithm.support.QuickSort; p#go<Y#
import org.rut.util.algorithm.support.SelectionSort; pyJY]"UHVE
import org.rut.util.algorithm.support.ShellSort; T)?:q
#eadkj#;
/** gqJSz}'
* @author treeroot yyB;'4Af
* @since 2006-2-2 8w/$!9[
* @version 1.0 1fUg
*/ 0h=NbLr|S-
public class SortUtil { ;+jz=9Q-
public final static int INSERT = 1; z-ns@y(f@X
public final static int BUBBLE = 2; =z#6mSx|W
public final static int SELECTION = 3; +?y ', Ir
public final static int SHELL = 4; /6",#B}%b
public final static int QUICK = 5; XT+V> HI
public final static int IMPROVED_QUICK = 6; .Nt;J,U
public final static int MERGE = 7; a4aM.o
public final static int IMPROVED_MERGE = 8; ?TTtGbvU
public final static int HEAP = 9; o?5m^S14[1
0])D)%B k
public static void sort(int[] data) { _[F(8Qx"
sort(data, IMPROVED_QUICK); o_ng{SL
} ISa}Km>Q
private static String[] name={ Sq22]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V9`?s0nn^
}; <OgwA$abl%
x Zp`
private static Sort[] impl=new Sort[]{ 28 Q\{Z.
new InsertSort(), R|D%1@i]
new BubbleSort(), @~7y\G
new SelectionSort(), (E(J}r~E
new ShellSort(), _\&vA5-
new QuickSort(), OTe h8h
new ImprovedQuickSort(), hufpky[&8
new MergeSort(), 1FA:"0lO
new ImprovedMergeSort(), (>49SOu;$\
new HeapSort() d!57`bVOd
}; L0\~K~q
G]v BI=
public static String toString(int algorithm){ 6+UTEw;
return name[algorithm-1]; <S ae:m4
} DyPHQ}G
QJ\+u
public static void sort(int[] data, int algorithm) { DbWaF5\yD
impl[algorithm-1].sort(data); G22{',#r8
} Lm&BT)*
LA]UIM@
public static interface Sort { 43.Q);4
public void sort(int[] data); ]A&pXAM
} pJdR`A-k|
ctOBV
public static void swap(int[] data, int i, int j) { f/95}6M
int temp = data; 8AVtUU
data = data[j]; P(%^J6[>
data[j] = temp; 1SF8D`3
} m)l'i!Y
} 1'B&e)