[JAVA]用Java实现的各种排序

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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; ]#BXaBVMY
} ]Rj"/(X,
int i1=l; >`{i[60r
int i2=mid+1; {Y0I A97,
for(int cur=l;cur<=r;cur++){ (Wx)YI
if(i1==mid+1) Ap!UX=HBb
data[cur]=temp[i2++]; =k$d8g ez
else if(i2>r) Q%eBm_r;
data[cur]=temp[i1++]; pRU6jV 6e)
else if(temp[i1] data[cur]=temp[i1++]; 8W$="s2
else h[Iu_#HMa
data[cur]=temp[i2++]; 3LXpe8$lJ
} N"T8 Pt
} Q?"[zX1
O]Kb~jkd
} }TF<C!]
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改进后的归并排序: 25ayYO%PTc
cw5YjQ8 9
package org.rut.util.algorithm.support; jSG jv>
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import org.rut.util.algorithm.SortUtil; x.^vWka(
3?O|X+$p
/** :?UIyN?
* @author treeroot zHdp'J"
* @since 2006-2-2 }oN(nPxv9
* @version 1.0 T^nX+;:|
*/ I2W2B3D` c
public class ImprovedMergeSort implements SortUtil.Sort { ;9I#>u
v PGuEfz
private static final int THRESHOLD = 10; K[kmfXKu
OeAPBhTmFj
/* z9+94<J
* (non-Javadoc) D/:)rj14b
* IL\mFjZ'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i&HV8&KygN
*/ WuNu}Ibl}m
public void sort(int[] data) { Dw#&x/G
int[] temp=new int[data.length]; e{}o:r
mergeSort(data,temp,0,data.length-1); _bd#C
} PR'FSTg
(mD]}{>
private void mergeSort(int[] data, int[] temp, int l, int r) { SW; bE
int i, j, k; ]rNfr-
int mid = (l + r) / 2; &*yve}su
if (l == r) }fCM_w
return; K%gFD?{^q
if ((mid - l) >= THRESHOLD) )m'_>-`^:
mergeSort(data, temp, l, mid); P\AH9#XL
else UF%5/SiVX
insertSort(data, l, mid - l + 1); ..T(9]h
if ((r - mid) > THRESHOLD) |X.z|wKT6
mergeSort(data, temp, mid + 1, r); q#a21~S<
else ,9pi9\S
insertSort(data, mid + 1, r - mid); v8@dvT<
@i68%6H`?
for (i = l; i <= mid; i++) { YiJu48J
temp = data; Q&#:M>!|
} Yq Fzbm{\
for (j = 1; j <= r - mid; j++) { d5=xOEv; :
temp[r - j + 1] = data[j + mid]; 6wd]X-G++
} -Q@d
int a = temp[l]; :$tW9*\KY
int b = temp[r]; "n e'iJf_(
for (i = l, j = r, k = l; k <= r; k++) { G6,8Xwk
if (a < b) { q kKABow
data[k] = temp[i++]; \l2 s^7G_
a = temp; oTfbx+i/G
} else { KC(Ug4
data[k] = temp[j--]; ^~aSrREo
b = temp[j]; |pgkl`
} j<KC$[Kt
} I;v`o{
} OZ" <V^"`
Imwx~eo
/** OKqpc;y:D
* @param data 0?7uqS#L
* @param l Vj]kJ,j\y
* @param i X^W> "q
*/ 5oKc=iX_3
private void insertSort(int[] data, int start, int len) { II8nz[s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9y4rw]4zI
} (=/F=,w
} v wyDY%B"n
} H_j<%VW
} _+N^yw,r*
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堆排序： p~.@8r(
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package org.rut.util.algorithm.support; f UIs(}US
KR}0(,Y
import org.rut.util.algorithm.SortUtil; 'O`3FI
$Y`aS^IW
/** U.aa iX7
* @author treeroot *X\c $=*
* @since 2006-2-2 W.|6$hRl)
* @version 1.0 LasH[:QQQ
*/ r$F]e]Ic\
public class HeapSort implements SortUtil.Sort{ ;SW-dfo2i
ptR
/* (non-Javadoc) ;Kf|a}m-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %RN-J*s]
*/ ay_D.gxz
public void sort(int[] data) { #H[4?4r
MaxHeap h=new MaxHeap(); _PM<25Y,@
h.init(data); p4'"Wk8
for(int i=0;i h.remove(); $<cZ<g5)
System.arraycopy(h.queue,1,data,0,data.length); Fsf22
} pPZ/O6
j0~3[dyqU
private static class MaxHeap{ kYB <FwwB
vb- .^l
void init(int[] data){ ?I'-C?(t@1
this.queue=new int[data.length+1]; v-3zav
for(int i=0;i queue[++size]=data; Hl;p>>n
fixUp(size); J,O@T)S@
} j/<y
} J31M:<
tA-B3 ]
private int size=0; #Qr4Ke$g[l
JP4Moq~r
private int[] queue; XijLS7Aw|
f~FehN7
public int get() { U!/nD~A
return queue[1]; b8.%?_?
} #mhD; .Wg
Qs9U&*L
public void remove() { rk/ c
SortUtil.swap(queue,1,size--); _vdxxhJ=P3
fixDown(1); xacLlX+
} o#xg:m_py
file://fixdown ?@?a}
private void fixDown(int k) { r^t{Ii~
int j; &a_kJ)J
while ((j = k << 1) <= size) { m@.{zW7bO
if (j < size %26amp;%26amp; queue[j] j++; @$P!#z
if (queue[k]>queue[j]) file://不用交换 $Je"z]cy-
break; 4nH91Z9=
SortUtil.swap(queue,j,k); *Qx|5L!_
k = j; 9ET+k(wI@
} 8 tygs
} mRH]'dlD7
private void fixUp(int k) { y8vH?^:%<
while (k > 1) { ph?0I:eU
int j = k >> 1; 5\0.[W{^
if (queue[j]>queue[k]) _IV@^v
break; ,/6:bc:W
SortUtil.swap(queue,j,k); (?BgT i\
k = j; p@Y$eZ:O
} &}0wzcMg
} 1?RCJ]e5
AC:s4iacC
} 'UVv(-
PdH`_/6
} =)- Q?1q
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SortUtil： :{s%=\k {d
g#bu_E61B
package org.rut.util.algorithm; X$ B]P7G7
$SzCVWS
import org.rut.util.algorithm.support.BubbleSort; A>t!/_"
import org.rut.util.algorithm.support.HeapSort; 9G&l qfX:
import org.rut.util.algorithm.support.ImprovedMergeSort; y3nm!tjyM
import org.rut.util.algorithm.support.ImprovedQuickSort; C^" Hj
import org.rut.util.algorithm.support.InsertSort; O)xEF~DaD
import org.rut.util.algorithm.support.MergeSort; |SP.S 0.y
import org.rut.util.algorithm.support.QuickSort; tnF9Vj[#%_
import org.rut.util.algorithm.support.SelectionSort; mvA xx`jc
import org.rut.util.algorithm.support.ShellSort; *:T>~ilF
s`iNbW="
/** <W51oO
* @author treeroot c =N]! ,MO
* @since 2006-2-2 bEQtVe@`
* @version 1.0 @=0r3
*/ V2s}<uG
public class SortUtil { {9Mdt`WL
public final static int INSERT = 1; "h^#<bPN
public final static int BUBBLE = 2; dA)4(0o8fD
public final static int SELECTION = 3; rrY{Jf9>
public final static int SHELL = 4; H'0*CiHes
public final static int QUICK = 5; Kt90mA
public final static int IMPROVED_QUICK = 6; K-EI?6`xM
public final static int MERGE = 7; @yn^6cE
public final static int IMPROVED_MERGE = 8; 4 ?@uF[
public final static int HEAP = 9; aT1CpY=T|.
5Vqmv<F;$Z
public static void sort(int[] data) { *[xNp[4EU
sort(data, IMPROVED_QUICK); ;WS7.
} QR5,_wJ&
private static String[] name={ (: TGev
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UiK+c30FU
}; *lerPY3 q
]PzTl {]
private static Sort[] impl=new Sort[]{ r$r&4dY
new InsertSort(), k~jKJb-_
new BubbleSort(), 8q~FUJhU
new SelectionSort(), {{]=zt|69
new ShellSort(), /y](mu"!
new QuickSort(), 6PJJ?}P^1
new ImprovedQuickSort(), ?St=7a(D
new MergeSort(), 5{ 4"JO3
new ImprovedMergeSort(), $uUb$8Bu
new HeapSort() moVa'1ul
}; g;-+7ViIr
G{f`K^
public static String toString(int algorithm){ g2aT`=&Z
return name[algorithm-1]; n.a=K2H:V
} l<aqiZSY
,dZ H$
public static void sort(int[] data, int algorithm) { (]}x[F9l
impl[algorithm-1].sort(data); cPx~|,)l
} XY!{g(
_ 7BF+*T
public static interface Sort { nG},v%
public void sort(int[] data); :n+y/6*
} B15O,sL&W
@7Rt4}g
public static void swap(int[] data, int i, int j) { vzyNc'
int temp = data; urT/+deR
data = data[j]; (pE\nuA\
data[j] = temp; 7TV>6i+7
} v#:+n+y\z
} w%8ooQ|C