[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; jc;&g)Rv
} OD>-^W t;%
int i1=l; ; {I{X}b
int i2=mid+1; rVQ:7\=Z
for(int cur=l;cur<=r;cur++){ JEY%(UR8
if(i1==mid+1) sF_.9G)S0
data[cur]=temp[i2++]; "TtK!>!.
else if(i2>r) Gpe h#Q4x
data[cur]=temp[i1++]; QHMXQyr(
else if(temp[i1] data[cur]=temp[i1++]; ~DqNA%Mb
else }kL%l
data[cur]=temp[i2++]; FjiLc=RXXz
} }}t"^ms
} hpWAQ#%oHm
]N1$ioC#
} qK|r+}g|&
A!iH g__/t
改进后的归并排序: gADt%K2#Z
S)g5Tu)
package org.rut.util.algorithm.support; L=Dx$#|
MrOW&7
import org.rut.util.algorithm.SortUtil; *i5&x/ds
P|HY=RMa
/** h]@Xucc
* @author treeroot 7jts;H=
* @since 2006-2-2 An]*J|nFIY
* @version 1.0 22tY%Y9
*/ 6EX:qp^`
public class ImprovedMergeSort implements SortUtil.Sort { cty~dzX^
ODv)-J
private static final int THRESHOLD = 10; |r0j>F
/^/'9}7
/* webT
* (non-Javadoc) 1+#Vj#
* ?0'bf y]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |C>Yd*E,C
*/ H7qda'%>
public void sort(int[] data) { ynP^|Ou
int[] temp=new int[data.length]; rK=[&k
mergeSort(data,temp,0,data.length-1); qViky=/-
} Y 3KCIL9
i>)Whr'e8
private void mergeSort(int[] data, int[] temp, int l, int r) { %HYC-TF#
int i, j, k; )- 2^Jvc
int mid = (l + r) / 2; Yl-09)7s
if (l == r) 5r zB"L
return; X/gh>MJJ<
if ((mid - l) >= THRESHOLD) ",Q\A I
mergeSort(data, temp, l, mid); !EpP-bq'*
else Grjm9tbX}
insertSort(data, l, mid - l + 1); CUxSmN2[
if ((r - mid) > THRESHOLD) #+Vvf
mergeSort(data, temp, mid + 1, r); ;Kkn7&'F
else PFEi=}Y@((
insertSort(data, mid + 1, r - mid); lX5(KUN
83TN6gW
for (i = l; i <= mid; i++) { /tt
temp = data; L]HY*e
} g-*@I`k[
for (j = 1; j <= r - mid; j++) { 3QV|@5L`[
temp[r - j + 1] = data[j + mid]; .'.|s?s
} sF|<m)Kt{W
int a = temp[l]; zhN'@Wj'_
int b = temp[r]; Iupk+x>
for (i = l, j = r, k = l; k <= r; k++) { yRvq3>mU
if (a < b) { OSkZW
data[k] = temp[i++]; (#Y2H
a = temp; R_@yj]%H=
} else { (5G^"Srw
data[k] = temp[j--]; @9vz%1B<l
b = temp[j]; ej!C^
} ^8V]g1]fiG
} "F%cn@l
} %X[|7D-
!Rsx)
/** /3+7a\|mKr
* @param data n$b/@hp$z
* @param l m! p'nP
* @param i |(S=G'AtU
*/ CiPD+I
private void insertSort(int[] data, int start, int len) { c>DAR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PJ #uYM
} u.!Pda
} -} Z
} WgxlQXi-B
} ~^VcTSY@<L
s*]1d*B!
堆排序： H%])>
O'idS`
package org.rut.util.algorithm.support; YtIJJH
>nl*aN
import org.rut.util.algorithm.SortUtil; !vett4C* K
-{L[Wt{1
/** GD*6tk;5/
* @author treeroot fMLm_5(H
* @since 2006-2-2 Yq;S%.
* @version 1.0 {kZhje^$vi
*/ =VY[m-q5
public class HeapSort implements SortUtil.Sort{ @~a52'\
?<F\S2W
/* (non-Javadoc) g<.VW0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |5![k<o#
*/ [#2= w
public void sort(int[] data) { Wigm`A=,r
MaxHeap h=new MaxHeap(); /- kMzL
h.init(data); X8*q[@$
for(int i=0;i h.remove(); y'E)iI*
System.arraycopy(h.queue,1,data,0,data.length); fNB*o={r|
} J-I7K!B
;J?!D x
private static class MaxHeap{ Lb/a_8<E?
uOBpMAJ
void init(int[] data){ yil{RfBEr_
this.queue=new int[data.length+1]; i>e75`9
for(int i=0;i queue[++size]=data; GbNVcP.ocP
fixUp(size); y< 146
} Vw)\#6FL
} nGyY`wt&Rg
44_n5vp,T
private int size=0; M)3h 4yQ
D;:lw]
private int[] queue; 5(U.<
\6@}HFH
public int get() { <cWo]T`X!
return queue[1]; '5[L []A
} Gm.v-T$
l}<s~ip
public void remove() { !5=3Y4bg1
SortUtil.swap(queue,1,size--); i4Fw+Z
fixDown(1); ,Xb:f/lB
} $RF"m"
file://fixdown LY^BkH'
private void fixDown(int k) { , :kCt=4%
int j; [& hdyLt
while ((j = k << 1) <= size) { ;l?>+m@H
if (j < size %26amp;%26amp; queue[j] j++; -G*u2i_*
if (queue[k]>queue[j]) file://不用交换 <vbk@d
break; hr)TC-
SortUtil.swap(queue,j,k); S9xC> |<
k = j; r{Fu|aoa;5
} 6|9];)
} iOD9lR`s
private void fixUp(int k) { )fCl<KG*
while (k > 1) { Kk??}
int j = k >> 1; JXvHsCd?
if (queue[j]>queue[k]) W6jB!W
break; !0zM@p
SortUtil.swap(queue,j,k); @zPWu}&m
k = j; n287@Y4Ru
} oM< &4F
} x&8?/BR
~%sDQt\S
} OGae]O<
^(6.P)$
} 4I2ppz
Q0M8}
SortUtil： n){\KIU/O
,,,5pCi\
package org.rut.util.algorithm; 1M<'^(t3d
l?#([(WM
import org.rut.util.algorithm.support.BubbleSort; j[=f;&1
import org.rut.util.algorithm.support.HeapSort; SUvHLOA
import org.rut.util.algorithm.support.ImprovedMergeSort; ^TB%| yZ _
import org.rut.util.algorithm.support.ImprovedQuickSort; EcP"GO5
import org.rut.util.algorithm.support.InsertSort; 4\-kzGgmo
import org.rut.util.algorithm.support.MergeSort; `%rqQnVB
import org.rut.util.algorithm.support.QuickSort; a:P% r
import org.rut.util.algorithm.support.SelectionSort; C0kwI*)
import org.rut.util.algorithm.support.ShellSort; cIq3En
=P2T&Gb
/** x#pTB.
* @author treeroot m4kmJaM
* @since 2006-2-2 _u.l|yR
* @version 1.0 cL`l1:j\}
*/ \)LY_D:
public class SortUtil { N-vr_4{g
public final static int INSERT = 1; #>!!#e!*
public final static int BUBBLE = 2; EV~_-YC
public final static int SELECTION = 3; WlG/7$
public final static int SHELL = 4; Zb}=?fcL;@
public final static int QUICK = 5; n1!u aUC
public final static int IMPROVED_QUICK = 6; Yz{UP)TC
public final static int MERGE = 7; R=PjLH&)
public final static int IMPROVED_MERGE = 8; i%-c/ lop
public final static int HEAP = 9; Q@l3XNH|c
^>]p4Q3 6
public static void sort(int[] data) { TNiFl hq
sort(data, IMPROVED_QUICK); F1MPo;e
} #mtlgK'
private static String[] name={ |ukEnjI`u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )8P<ZtEU
}; Ee4oTU5Mb
od-N7lp#
private static Sort[] impl=new Sort[]{ ~Uga=&
new InsertSort(), y'Wz*}8pr
new BubbleSort(), !&! sn"yD
new SelectionSort(), !o>/gI`
new ShellSort(), o'Po<I
new QuickSort(), 4UG7{[!+
new ImprovedQuickSort(), o3%+FWrVTS
new MergeSort(), Fet>KacTht
new ImprovedMergeSort(), o2Z# 5-
new HeapSort() H?O*
}; X;zy1ZH
}X}fX#[
public static String toString(int algorithm){ ?;}2Z)
return name[algorithm-1]; &4p:2,|r9
} {t9'8R3
B \[P/AC
public static void sort(int[] data, int algorithm) { &{l?j>|TM
impl[algorithm-1].sort(data); (}c}=V
} `ZNzDr
M-0BQs`N
public static interface Sort { v')T^b F@
public void sort(int[] data); ~ dmyS?Or
} o- GHAQ
&e2") 4oh
public static void swap(int[] data, int i, int j) { 1oodw!hW
int temp = data; Qv[@ioc
data = data[j]; s{hJ"lv:
data[j] = temp; "EhA _ =i
} 6XB9]it6
} "EHwv2Hm>