[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; ,D1QJPM
} |HLh?AcX
int i1=l; C{-pVuhK+
int i2=mid+1; 3@PVUJ0B|
for(int cur=l;cur<=r;cur++){ Kt(p|
if(i1==mid+1) q$P"o].EK
data[cur]=temp[i2++]; _U %B1s3y
else if(i2>r) _DQdo
data[cur]=temp[i1++]; A@+.[[
else if(temp[i1] data[cur]=temp[i1++]; |Z;Av%%
else dhbJ1/z^
data[cur]=temp[i2++]; ux=@"!PJ
} S{ !hpq~o
} (TPD!=
Sk-Ti\
} w]}vm-
.1;?#t]ZV
改进后的归并排序: )I@iW\`7
`XQ5>c
package org.rut.util.algorithm.support; ?zEgN!\R)
=0S7tNut
import org.rut.util.algorithm.SortUtil; \c)XN<HH
`S|gfJ
/** k95vgn%
* @author treeroot &IPT$=u
* @since 2006-2-2 hwJ.M4
* @version 1.0 $HRpG
*/ ^*W3{eyi(L
public class ImprovedMergeSort implements SortUtil.Sort { Oqyh{q%]
+e\u4k{3V
private static final int THRESHOLD = 10; ocvBKsfhE`
D c^d$gh
/* h!.(7qdd
* (non-Javadoc) {|cA[#j#
* Tn|reXc0e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v|e>zm<
*/ I`|>'$E[r
public void sort(int[] data) { Ua4} dW[w
int[] temp=new int[data.length]; 1D$k:|pP~
mergeSort(data,temp,0,data.length-1); rqIt}(J
} V+Z22
kDrGl{U}
private void mergeSort(int[] data, int[] temp, int l, int r) { <mxUgU
int i, j, k; Ur@3_F
int mid = (l + r) / 2; =o {`vv
if (l == r) j>U.(K
return; ~vgW:]i
if ((mid - l) >= THRESHOLD) *UTk. :G5
mergeSort(data, temp, l, mid); xg8<b
else :?,&u,8
insertSort(data, l, mid - l + 1); A/MOY@%G
if ((r - mid) > THRESHOLD) tU(6%zvR
mergeSort(data, temp, mid + 1, r); @U}UCG7+
else ny}?+&K
insertSort(data, mid + 1, r - mid); \l`;]cA
2b<0g@~X
for (i = l; i <= mid; i++) { z}5XLa^
temp = data; \%K6T)9
} 9X-DR
for (j = 1; j <= r - mid; j++) { eK`tFs,u
temp[r - j + 1] = data[j + mid]; g$+3IVq&
} KP i@wl3
int a = temp[l]; ,PB?pp8C}
int b = temp[r]; @`T6\ 1
for (i = l, j = r, k = l; k <= r; k++) { GxBj N7"
if (a < b) { /a,q4tD@
data[k] = temp[i++]; ,Vogo5~X
a = temp; (wTg aV1
} else { R75sK(oS
data[k] = temp[j--]; 54k Dez
b = temp[j]; >+1bTt/-F
} TnC'<zm9!
} NIgt"o[I
} giPyo"SD
V; ChrmE
/** :%0Z
* @param data U_:/>8})d
* @param l R\XJ
* @param i %c&h:7);
*/ 3KqylC&.
private void insertSort(int[] data, int start, int len) { zpY8w#b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qRr;&M &t_
} M|\XFO
} g}f@8;TY
} ;;2s{{(R
} <|{=O9
P\Ka'i
堆排序： Mqna0"IYx*
'rSM6j
package org.rut.util.algorithm.support; F:n7yey
vnKUD|
import org.rut.util.algorithm.SortUtil; (h E^<jNR
v"^G9u
/** [[Z*n/tr
* @author treeroot $+Xohtt
* @since 2006-2-2 9Gy1T3y5"
* @version 1.0 7,:QFV
*/ a^,Xm(Wb}
public class HeapSort implements SortUtil.Sort{ gG#M-2P
n|8fdiK#}
/* (non-Javadoc) /m%;wH|6%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +Ix;~
*/ G=wJz
public void sort(int[] data) { VlKWWQj
MaxHeap h=new MaxHeap(); um[.r,++
h.init(data); d!>PqPo
for(int i=0;i h.remove(); lLnD%*03
System.arraycopy(h.queue,1,data,0,data.length); i`X/d=
} 1Ztoj}!I
WzF/wzR
private static class MaxHeap{ iZ&CE5+
%kF6y_h`
void init(int[] data){ D&.+Dx^G
this.queue=new int[data.length+1]; LnLuWr<;}
for(int i=0;i queue[++size]=data; o_{-X 1w
fixUp(size); ]@_*O$
} /CH*5w)1
} 6z~6o0s~
hivWQ$6%
private int size=0; p2\@E} z
aCQAh[T
private int[] queue; "I u3&mc
,XR1N$LN8_
public int get() { <"6}C)G
return queue[1]; caS5>wk`R
} L,BuzU[1S
&S/KR$^ %
public void remove() { wD4Kil=v
SortUtil.swap(queue,1,size--); iXI >>9
fixDown(1); a:C ly9
} _pL:dKfy7
file://fixdown t}+P|$[
private void fixDown(int k) { ?3[as<GZ8
int j; H}`}qu #~V
while ((j = k << 1) <= size) { jruwdm^
if (j < size %26amp;%26amp; queue[j] j++; ZPRkk?M}.
if (queue[k]>queue[j]) file://不用交换 FK<1SOE
break; r"c<15g2'
SortUtil.swap(queue,j,k); =5J}CPKbZI
k = j; EP,lT.u3
} Re-4y5f
} "H#2
private void fixUp(int k) { 8do-z"-
while (k > 1) { .O@T#0&=_
int j = k >> 1; U8 '}(
if (queue[j]>queue[k]) `bNY[Gv>)
break; #R}sGT
SortUtil.swap(queue,j,k); 4'[/gMUkw
k = j; s>ilxLSX]
} n2cb,b/7
} '_>8_
^i:%0"[*^i
} qi!+Ceo}
5NHNnDhuL
} T@Mrbravc
OF-$*
SortUtil： 'a[|'
t[ cHdI
package org.rut.util.algorithm; .]24V!J(1w
q-}qrg
import org.rut.util.algorithm.support.BubbleSort; 4J{6Wt";
import org.rut.util.algorithm.support.HeapSort; $9bLD >.
import org.rut.util.algorithm.support.ImprovedMergeSort; opc`n}Fc
import org.rut.util.algorithm.support.ImprovedQuickSort; /?VwoSgV^
import org.rut.util.algorithm.support.InsertSort; g[4pG`z
import org.rut.util.algorithm.support.MergeSort; &#_c,c;
import org.rut.util.algorithm.support.QuickSort; ^zn&"@
import org.rut.util.algorithm.support.SelectionSort; J#ujIe
import org.rut.util.algorithm.support.ShellSort; 9Zw{MM]
](-zt9, N;
/** `)?N7g[\u
* @author treeroot 0o7*5| T4
* @since 2006-2-2 '*lVVeSiFw
* @version 1.0 >cw%ckE
*/ gaV>WF
public class SortUtil { wl7G6Y2
public final static int INSERT = 1; Lh\ 1L
public final static int BUBBLE = 2; m9M#)<@*
public final static int SELECTION = 3; ^ZP $(a4
public final static int SHELL = 4; pr-=<[ d
public final static int QUICK = 5; _Fkz^B*
public final static int IMPROVED_QUICK = 6; #p$iWY>e~
public final static int MERGE = 7; y rH@:D/
public final static int IMPROVED_MERGE = 8; :8=7)cW
public final static int HEAP = 9; gjFpM.D-.
0i[v,eS
public static void sort(int[] data) { y!eT>4Oyg
sort(data, IMPROVED_QUICK); >\[/e{Q"
} ;S0Kf{DN2
private static String[] name={ @S9^~W3G3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3n_N^q}
}; 7bSj[kuN
sBm)D=Kll
private static Sort[] impl=new Sort[]{ LT[g +zGB
new InsertSort(), Q?xA))0
new BubbleSort(), [3D*DyQt
new SelectionSort(), s_o{w"3X
new ShellSort(), z;iNfs0i$
new QuickSort(), ?*LVn~y
new ImprovedQuickSort(), ~ kwS`
new MergeSort(), }iIZA>eF
new ImprovedMergeSort(), C2 4"H|D
new HeapSort() 'Y2ImSWj
}; z;wOtKl5r
N2 4J!L
public static String toString(int algorithm){ n,D&pl9f
return name[algorithm-1]; g^I?u$&E
} hU'h78bt(
Xrl# DN
public static void sort(int[] data, int algorithm) { Y#[xX2z9
impl[algorithm-1].sort(data); D,\hRQ
} cXw8#M!
Lo,uH`qU
public static interface Sort { {^":^N)
public void sort(int[] data); {'cm;V+
} g>E.Snj}
k@Qd:I;;
public static void swap(int[] data, int i, int j) { &ea6YQ
int temp = data; DrK@y8
data = data[j]; n{$! ]^>
data[j] = temp; A3^_'K
} L.2!Q3&
} ^|%u%UR