[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; mVUDPMyZ
} VbQ9o
int i1=l; }g6:9%ZMu
int i2=mid+1; A&u"NgJ
for(int cur=l;cur<=r;cur++){ CvDy;'{y1
if(i1==mid+1) `3GC}u>}
data[cur]=temp[i2++]; aMI\gCB/
else if(i2>r) *ElR
data[cur]=temp[i1++]; .b'hVOs{
else if(temp[i1] data[cur]=temp[i1++]; #Q320}]{
else DWT4D)C,U
data[cur]=temp[i2++]; lW}"6@0,
} 2O}UVp>
} $C@v
1xAZ0X#
} *tkbC2D
PO9<g%qTf
改进后的归并排序: c@iP^;D
^,F8 ha
package org.rut.util.algorithm.support; AWSe!\b
E{_$C!.
import org.rut.util.algorithm.SortUtil; &aD]_+b
3%c{eZxG=
/** 9nIBs{`/Ac
* @author treeroot Q(Uj5aX
* @since 2006-2-2 BfQRw>dZ"{
* @version 1.0 Q?]307g7
*/ :{2exu
public class ImprovedMergeSort implements SortUtil.Sort { bj)dYjf
tS!|#h-J
private static final int THRESHOLD = 10; RDX".'`(=
O+D"7
/* ^}nz^+R
* (non-Javadoc) ra#s!m1
* P5{|U"Y_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~bL^&o(W
*/ *oR`l32O0z
public void sort(int[] data) { 'uAH, .B
int[] temp=new int[data.length]; i&KD)&9b#
mergeSort(data,temp,0,data.length-1); z=q
} qgTN %%"~
D4jf%7X!Lu
private void mergeSort(int[] data, int[] temp, int l, int r) { 38(Cj~u=3
int i, j, k; 0>PO4WFVJ
int mid = (l + r) / 2; &Z Ja}5k!r
if (l == r) ?Uz7($}
return; 'J*)o<%
if ((mid - l) >= THRESHOLD) QvB]?D#h
mergeSort(data, temp, l, mid); tTa" JXG
else ,1>ABz
insertSort(data, l, mid - l + 1); X[pk9mha
if ((r - mid) > THRESHOLD) qSj$0Hq5XI
mergeSort(data, temp, mid + 1, r); p_z_d6?
else ZUE?19GA
insertSort(data, mid + 1, r - mid); l+$e|F
$'M:H_T
for (i = l; i <= mid; i++) { .^]=h#[e
temp = data; >C|/%$kk:f
} WHh=hts\
for (j = 1; j <= r - mid; j++) { +;nADl+Q
temp[r - j + 1] = data[j + mid]; n|,kL!++.
} cZnB 2T?
int a = temp[l]; `a.1Af;L
int b = temp[r]; ~i&Lc7Xl
for (i = l, j = r, k = l; k <= r; k++) { E2f9J{Ki=
if (a < b) { ?<@yo&)
data[k] = temp[i++]; bY6y)l
a = temp; 5~WMb6/
} else { Q{9#Am^6w
data[k] = temp[j--]; S].=gR0:
b = temp[j]; K%TlBKV
} i,G )kt'H
} &W1{o&
} 9p,<<5{
%trtP
/** TRQX#))B
* @param data lZ^UAFF
* @param l Rb_HD
* @param i Epm'u[wV
*/ ;jb+x5t
private void insertSort(int[] data, int start, int len) { 'IrwlS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lW F=bz0
} gHS;RF9
} I<Vh Eo,
} -QaS/WO_
} y@!kp*0
0q_Ol]<V
堆排序： zw=as9z1-
muSQFIvt
package org.rut.util.algorithm.support; R!7emc0T
wg?:jK
import org.rut.util.algorithm.SortUtil; V+A1O k)
A]nDI:pO|
/** ,O=@I
* @author treeroot mUi|vq)`=D
* @since 2006-2-2 ]#hT!VOd
* @version 1.0 h[c HCVM:
*/ =Mc]FCV
public class HeapSort implements SortUtil.Sort{ V%~u8b
f#xqu+)Z
/* (non-Javadoc) F*WWv&\X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qcxq-HS2'
*/ |q$br-0+
public void sort(int[] data) { _"`wUMee
MaxHeap h=new MaxHeap(); 54 8w v
h.init(data); HaeF`gI^Ee
for(int i=0;i h.remove(); >c~~i-=
System.arraycopy(h.queue,1,data,0,data.length); p-U'5<n
} Xg#g`m%(M
~mUP!f
private static class MaxHeap{ |L{<=NNs:D
GXaCH))TO
void init(int[] data){ B^(0>Da\
this.queue=new int[data.length+1]; D]+tr%
for(int i=0;i queue[++size]=data; Py(l+Ik`>
fixUp(size); ;D_6u(IC4:
} m{gK<T
} 8a{FxCBw
o{\@7'G
private int size=0; `nMHuv
[!>2[bbl
private int[] queue; Rs;,_
?Mp)F2'
public int get() { Q!>8E4Z
return queue[1]; tq9t(0EL
} [|~X~AO%
Py 8o8*H
public void remove() { n }lav
SortUtil.swap(queue,1,size--); vO" $Xw
fixDown(1); {m}B=u
} ih1s`CjG
file://fixdown [_j.pMH/P
private void fixDown(int k) { FE1dr_i
int j; <PkDfMx2
while ((j = k << 1) <= size) { )_EQU8D4ug
if (j < size %26amp;%26amp; queue[j] j++; 1p,G8v+B
if (queue[k]>queue[j]) file://不用交换 |::kC3=
break; (CYVSO
SortUtil.swap(queue,j,k); 6m21Y8N
k = j; lfR"22t
} ?7:"D e
} hMw}[6m
private void fixUp(int k) { nZQZ!Vfj
while (k > 1) { $i@5'[jA
int j = k >> 1; ?|^1-5l3
if (queue[j]>queue[k]) ;D]TPBE
break; (JFa
SortUtil.swap(queue,j,k); =_cWCl^5
k = j; Pw /wAUt
} iZ[o2Tre
} ,%dn)gt7
;BoeE3* 6
} e,I-u'mLQs
M:?eK [h
} M 0->
?MeP<5\A
SortUtil： _}Jz_RS2`
Yl1@gw7
package org.rut.util.algorithm; Fw:s3ON9}
Y_PCL9G{p
import org.rut.util.algorithm.support.BubbleSort; gzzPPd,hd
import org.rut.util.algorithm.support.HeapSort; n<yV]i$
import org.rut.util.algorithm.support.ImprovedMergeSort; &nPv%P,e
import org.rut.util.algorithm.support.ImprovedQuickSort; =KT7ZSTV
import org.rut.util.algorithm.support.InsertSort; r3Z-mJ$:
import org.rut.util.algorithm.support.MergeSort; :[(X!eP
import org.rut.util.algorithm.support.QuickSort; )2F:l0g
import org.rut.util.algorithm.support.SelectionSort; k` (_~/#
import org.rut.util.algorithm.support.ShellSort; c<JJuG
ycw'>W3.*
/** Re<X~j5]
* @author treeroot @R}L 4
* @since 2006-2-2 Q+G=f
* @version 1.0 7"4|`y^#
*/ iO#H_&L.p
public class SortUtil { "_'9KBd!
public final static int INSERT = 1; @oYq.baHX
public final static int BUBBLE = 2; n2,b~S\e
public final static int SELECTION = 3; L6$,<}l
public final static int SHELL = 4; 1Sz5&jz
public final static int QUICK = 5; >!? f6 {\|
public final static int IMPROVED_QUICK = 6; P9`i6H'~
public final static int MERGE = 7; ~`tc|Zu
public final static int IMPROVED_MERGE = 8; k1-?2kf"{
public final static int HEAP = 9; ?\hXJih
B5B'H3@
public static void sort(int[] data) { oF V9t{~j
sort(data, IMPROVED_QUICK); [W{`L_"
} x+yt| &B
private static String[] name={ Q'~;RE%T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "@`mPe/
}; ,\}V.:THF
;5y4v
private static Sort[] impl=new Sort[]{ "cJ5Fd:*
new InsertSort(), Vzbl*Zmx
new BubbleSort(), `p1`Sxz?
new SelectionSort(), J+DuQ;k;
new ShellSort(), LZ&CGV"Z-
new QuickSort(), #3u8BLy$Q
new ImprovedQuickSort(), =K8`[iH
new MergeSort(), Q1eiU Y6
new ImprovedMergeSort(), |7%$+g
new HeapSort() Y!&dj95y
}; >47,Hq:2
uX}M0W
public static String toString(int algorithm){ by6E "7%
return name[algorithm-1]; `5e#9@/e
} NqqLRgMOR'
z8z U3?
public static void sort(int[] data, int algorithm) { wm2Q(l*HH
impl[algorithm-1].sort(data); uc7np]Z
} 5W<BEcV\
zKV{JUpG
public static interface Sort { =t)eT0
public void sort(int[] data); 5Y9 j/wA
} !2&h=;i~V
k7y!!AV
public static void swap(int[] data, int i, int j) { s?%1/&.~
int temp = data; YVW!u6W'[6
data = data[j]; T/S-}|fhQ
data[j] = temp; ,u]kZ]
} L**!$k"{5
} I[t)V*L9