[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; |U[y_Y\a
} Pn TZ/|
int i1=l; d+z[\i
int i2=mid+1; urY`^lX~
for(int cur=l;cur<=r;cur++){ o%(bQV-T
if(i1==mid+1) /L) 9tt.
data[cur]=temp[i2++]; MQcE6)
else if(i2>r) ]>:^d%n,}
data[cur]=temp[i1++]; ;np_%?is
else if(temp[i1] data[cur]=temp[i1++]; i8V0Ty4~N
else ]S8LY.Az5
data[cur]=temp[i2++]; CKARg8o
} 6i@ub%qq
} 4 9w=kzo
YaFcz$GE_
} -oBI+v&
AfWl6a?T8:
改进后的归并排序: rFag@Z"["
:q2YBa
package org.rut.util.algorithm.support; K, (65>86;
993d/z|DX
import org.rut.util.algorithm.SortUtil; f==*"?6\
;cSGlE |
/** GXb47_b^
* @author treeroot `ypL]$cW
* @since 2006-2-2 Md(JIlh3
* @version 1.0 q&M:17+:Q
*/ K_-MkY?+
public class ImprovedMergeSort implements SortUtil.Sort { =mrY/:V
LZWS^77
private static final int THRESHOLD = 10; |Mg }2!/L
6zYaA
/* (:?&G9k "
* (non-Javadoc) 'tWAuI
* o<4D=.g7D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y/4ny,s"
*/ WEa>)@
public void sort(int[] data) { (-(*XNC
int[] temp=new int[data.length]; H/i<_LP
mergeSort(data,temp,0,data.length-1); <Ry$7t,
} u7k|7e=xk
&G{2s J5{
private void mergeSort(int[] data, int[] temp, int l, int r) { yKDZ+3xK]
int i, j, k; sMi{"`37
int mid = (l + r) / 2; $v&C@l \
if (l == r) |QYZRz
return; jKt-~:
if ((mid - l) >= THRESHOLD) &tBA^igXK
mergeSort(data, temp, l, mid); R<&FhT]
else [,7-w
insertSort(data, l, mid - l + 1); nUqy1(
if ((r - mid) > THRESHOLD) )Xno|$b5Eo
mergeSort(data, temp, mid + 1, r); '0Zm#g
else XV2=8#R
insertSort(data, mid + 1, r - mid); jfSg){
1pCkWe
for (i = l; i <= mid; i++) { 7zI5PGWw
temp = data; V<-htV
} rbh[j@s@
for (j = 1; j <= r - mid; j++) { zUQe0Gc.b^
temp[r - j + 1] = data[j + mid]; ]C)|+`XE@
} t-lv|%+8
int a = temp[l]; :Y.e[@!1x
int b = temp[r]; ~L){O*Z
for (i = l, j = r, k = l; k <= r; k++) { TSXTc'
if (a < b) { .}p|`3$P
data[k] = temp[i++]; v |ifI
a = temp; IO[^z v4F
} else { u{+!& 2}k
data[k] = temp[j--]; 6^ik|k|
b = temp[j]; DQ5W6W
} <3Fz>}V32
} l:z};
} FQ##397
7:kCb[ji"
/** ;Vo mFp L
* @param data ]^!}*
* @param l T&4fBMBp,%
* @param i I7bi@t
*/ CgoXZX
private void insertSort(int[] data, int start, int len) { L<E/,IdE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); poY8 )2
} qL>v&Rd<
} ++k J\N{
} ]-EN/V
} _Y7:!-n}
x:C@)CAr
堆排序： \P?--AIq<
t[j9R#02?
package org.rut.util.algorithm.support; Wbd_aR (
"s;ci~$
import org.rut.util.algorithm.SortUtil; }#|2z}!
Re\o v x9
/** }6@%((9E2
* @author treeroot W+/2c4$F3
* @since 2006-2-2 h.D^1
* @version 1.0 r"[L0Cbb
*/ fr]Hc+7
public class HeapSort implements SortUtil.Sort{ UhBz<>i;!
'v+96b/;
/* (non-Javadoc) /=-h:0{M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8'%+G
*/ "Y(%oJS]D
public void sort(int[] data) { rxArTpS{.#
MaxHeap h=new MaxHeap(); =ty2_6&>
h.init(data); Hq-v@@0 *
for(int i=0;i h.remove(); i2U/RXu
System.arraycopy(h.queue,1,data,0,data.length); E]?2!)mgce
} d~,n_E$q;
yW:AVqE)t
private static class MaxHeap{ e~*S4dKR
Ss+F9J
void init(int[] data){ LiF.w:}
this.queue=new int[data.length+1]; ^Wk0*.wg
for(int i=0;i queue[++size]=data; XC2Q*Z
fixUp(size); ]Qc: Zy3
} X)y*#U
} MKe *f%
I'P.K| "R
private int size=0; fW[_+r]
?Cc$]
private int[] queue; x;*VCs
lvG3<ls0K$
public int get() { . *Z#cq0
return queue[1]; F-i&M1\_
} 78gob&p?
eNivlJ,K|@
public void remove() { <%(f9j
SortUtil.swap(queue,1,size--); i'9eKO
fixDown(1); 7~L|;^(
} %va[jJ
file://fixdown U<|B7t4M
private void fixDown(int k) { "hfw9Qm
int j; 4bWfx_0W
while ((j = k << 1) <= size) { }el,^~
if (j < size %26amp;%26amp; queue[j] j++; &4[<F"W>47
if (queue[k]>queue[j]) file://不用交换 `c>A>c|
break; Aw5K3@Ltz
SortUtil.swap(queue,j,k); J511AoQ{R
k = j; x[Hhj'
} ;Xz(B4N~o
} aTi0bQW{
private void fixUp(int k) { `yy%<&
while (k > 1) { <'VA=orD
int j = k >> 1; >&g2 IvDS
if (queue[j]>queue[k]) 0;'j!`l9
break; ))$ CEh"X
SortUtil.swap(queue,j,k); *?s/Ho &'
k = j; (1OW6xtfG
} ;k-g_{M
} 5BZ+b_A>VV
EwC5[bRjUp
} }`?7\\6
IwOfZuS
} tP -5
% 1OC#&
SortUtil： hwc:@'
1mAUEQ!
package org.rut.util.algorithm; Al)lWD}j2g
}7otuO(pRo
import org.rut.util.algorithm.support.BubbleSort; se}pdL}
import org.rut.util.algorithm.support.HeapSort; T,A!5V>cX
import org.rut.util.algorithm.support.ImprovedMergeSort; 5R&x{jf$
import org.rut.util.algorithm.support.ImprovedQuickSort; &%@/Dwr
import org.rut.util.algorithm.support.InsertSort; RT1{+:l
import org.rut.util.algorithm.support.MergeSort; !>?4[|?n<
import org.rut.util.algorithm.support.QuickSort; JvT%R`i
import org.rut.util.algorithm.support.SelectionSort; N;e}dwh&
import org.rut.util.algorithm.support.ShellSort; /vMQF+
jo]m12ps
/** )j$b9ZBk
* @author treeroot p|xs|O6{
* @since 2006-2-2 J{aQ1)
* @version 1.0 x;<oaT$X
*/ [%HYh7ua<
public class SortUtil { ' }y]mFpF
public final static int INSERT = 1; )zo#1$C-
public final static int BUBBLE = 2; y^5T/M
public final static int SELECTION = 3; oNh68ON:c
public final static int SHELL = 4; 7uWJ6Wk
public final static int QUICK = 5; \H},ouU
public final static int IMPROVED_QUICK = 6; B4PW4>GF
public final static int MERGE = 7; g/fp45s
public final static int IMPROVED_MERGE = 8; ly9x1`?$
public final static int HEAP = 9; i7Y s_8A"9
BXagSenc
public static void sort(int[] data) { <>ZBW9
sort(data, IMPROVED_QUICK); o6`Y7,]
} 3RBpbTNWp
private static String[] name={ N[- %0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z_5rAlnwT.
}; WV5r$
|_xZ/DT
private static Sort[] impl=new Sort[]{ ]b5%?^Z#
new InsertSort(), m~A[V,os
new BubbleSort(), R (+h)#![
new SelectionSort(), =vB]*?;9
new ShellSort(), PT 0Qzg
new QuickSort(), F5:2TEA
new ImprovedQuickSort(), T)$6H}[c
new MergeSort(), Z1XUYe62
new ImprovedMergeSort(), R!:eYoQ
new HeapSort() OqAh4qa,$
}; ]<&B BQ
@]?? +f}#
public static String toString(int algorithm){ :mCw.Jz<h
return name[algorithm-1]; C}dKbs^g|
} \;A50U|r
}z9I`6[
public static void sort(int[] data, int algorithm) { a>;3 j
impl[algorithm-1].sort(data); ]{q-Y<{"
} Y^*Lh/:h
A&X
public static interface Sort { %OezaNOtm
public void sort(int[] data); duZ|mT8Q==
} r_qncy,F
^=4I|+P,6.
public static void swap(int[] data, int i, int j) { {ziYd;Ys1
int temp = data; =rf)yp-D
data = data[j]; ^VM"!O;h{
data[j] = temp; o>/uW8
} s= -WB0E
} i} NkHEK