[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; Nv iPrp>c
} ZREAEGi{
int i1=l; H5N(MihT
int i2=mid+1; dIo|i,-
for(int cur=l;cur<=r;cur++){ nAp7X-t
if(i1==mid+1) 4D/mm(2d$
data[cur]=temp[i2++]; >)N}V'9
else if(i2>r) Mlpq2I_x
data[cur]=temp[i1++]; _5nQe !
else if(temp[i1] data[cur]=temp[i1++]; "F+Wo&
else Yb|zE
data[cur]=temp[i2++]; %V$ujun`
} Ik#>6
} KcB?[
T'*.LpNP,
} Z6cG<,DQ
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改进后的归并排序: (8r?'H8ZO
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package org.rut.util.algorithm.support; 6wWA(![w"
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import org.rut.util.algorithm.SortUtil; y^C;?B<
*4zVK/FJ
/** "z }bgy
* @author treeroot /Ki :6
* @since 2006-2-2 N[}XLhbt
* @version 1.0 V,uhBMT#
*/ A&5$eGe9
public class ImprovedMergeSort implements SortUtil.Sort { Oh:SH|=]#
rrSA.J{
private static final int THRESHOLD = 10; MjI}fs<
55oLj.l^j
/* KG#|Cq
* (non-Javadoc) iR#jBqXD
* ,gU9ywg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &%Hj.
*/ 'ce9v@(0
public void sort(int[] data) { $`'^&o;&f
int[] temp=new int[data.length]; $gZ|=(y&r
mergeSort(data,temp,0,data.length-1); 1F5F2OT$8
} 33\b@F7b
\Mlj 7.u]
private void mergeSort(int[] data, int[] temp, int l, int r) { q_f v1U3
int i, j, k; tazBZ'\c
int mid = (l + r) / 2; _>5BFQ_
if (l == r) Y@.> eS
return; zck)D^,aO
if ((mid - l) >= THRESHOLD) U2ANu|
mergeSort(data, temp, l, mid); [jumq1
else B>47Ic
insertSort(data, l, mid - l + 1); ]dDyz[NuvD
if ((r - mid) > THRESHOLD) ,)L.^<
mergeSort(data, temp, mid + 1, r); vS<;:3
else q0y?$XS
insertSort(data, mid + 1, r - mid); >[xQUf,p
i6m;2 UAa
for (i = l; i <= mid; i++) { U(./LrM05
temp = data; kX1hcAa
} zMrZ[AU
for (j = 1; j <= r - mid; j++) { Zt` ,DM
temp[r - j + 1] = data[j + mid]; xs &vgel>
} ,75,~
int a = temp[l]; l!iB -?'u
int b = temp[r]; kd\yHI9A
for (i = l, j = r, k = l; k <= r; k++) { Mdwh-Cis/
if (a < b) { !s)2H/KM8
data[k] = temp[i++]; "E2 g7n&
a = temp; . ~|^du<X
} else { 0t4i'??
data[k] = temp[j--]; F"23>3
b = temp[j]; v!`M=0k
} YgWnPp
} "Pys3=h
} "Ln\ZYB]
C1G Wi4)
/** SwP h-6
* @param data DTIy/
* @param l m dC. FO-
* @param i t%dPj8~
*/ cRg$~rYd
private void insertSort(int[] data, int start, int len) { nj9hRiLn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 50H[u|
} mI`dZ3h
} ;5=pBP.
} 7SqsVq`[~
} ;8b f5
Vfw$>og!
堆排序： jY?%LY@5I
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package org.rut.util.algorithm.support; `aI%laj&M
b'Uaj`Sn
import org.rut.util.algorithm.SortUtil; ng 6G<hi
/r?X33D!
/** E{Q^ZSV3B
* @author treeroot ZK'I$p]b
* @since 2006-2-2 03#_ (
* @version 1.0 yz+r@I5
*/ uC;@Yi8
public class HeapSort implements SortUtil.Sort{ ss2:8up 99
6% ,Q
/* (non-Javadoc) 9SFiL#1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vMI\$E&
*/ [}AcCXg`L
public void sort(int[] data) { 3?}SXmA'@
MaxHeap h=new MaxHeap(); |F=^Cu,
h.init(data); O>>8%=5Q
for(int i=0;i h.remove(); yi%B5KF~Al
System.arraycopy(h.queue,1,data,0,data.length); uIPR*9~6o
} $i`YtV
kdo)y(fn@
private static class MaxHeap{ FVpe*]
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void init(int[] data){ ~|!lC}!IKL
this.queue=new int[data.length+1]; eX$Biv1N
for(int i=0;i queue[++size]=data; "{:*fI;!
fixUp(size); _6[NYv$"
} ~gAx
} }z*p2)v`
R`<E3J\*
private int size=0; lubS{3<
7)]G"m{
private int[] queue; A6Qi^TI
4@Qq5kpk*
public int get() { $H9xM
return queue[1]; C/$IF M<
} L@ay4,e.bz
l{3utQH-=z
public void remove() { jW*A(bK8:
SortUtil.swap(queue,1,size--); nAYjSE
fixDown(1); /[-hJ=<Yb
} u/zfx;K
file://fixdown ~& l`"
private void fixDown(int k) { 3A9|{Vaz+6
int j; {!4%Z9G
while ((j = k << 1) <= size) { Yk5kC0B
if (j < size %26amp;%26amp; queue[j] j++; lV1|\~?4
if (queue[k]>queue[j]) file://不用交换 MWuVV=rd8a
break; "N;|~S)w!
SortUtil.swap(queue,j,k); S,v`rmI
k = j; - t+Mh.
} 'F~u \m=E
} B?4\IXek
private void fixUp(int k) { 8,=$>@u
while (k > 1) { (*1A0+S90
int j = k >> 1; oa4}GNH
if (queue[j]>queue[k]) _Dv^~e1c
break; ppYz~ {"r
SortUtil.swap(queue,j,k); r3-3*_
k = j; i>~?XVU
} D'&LwU,o
} :z:Blp>nK/
Mc6y'w
} OwEz(pj@
pqe tYu
} 4M]8po/;
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SortUtil： Q&J,"Vxw
^/+sl-6/F
package org.rut.util.algorithm; g[$B90
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import org.rut.util.algorithm.support.BubbleSort; gM*s/,;O"
import org.rut.util.algorithm.support.HeapSort; Vh<`MS0X
import org.rut.util.algorithm.support.ImprovedMergeSort; 7~16letQ
import org.rut.util.algorithm.support.ImprovedQuickSort; i~;8'>:|,M
import org.rut.util.algorithm.support.InsertSort; 4|(?Wt)5
import org.rut.util.algorithm.support.MergeSort; A_.QHUjpx
import org.rut.util.algorithm.support.QuickSort; |);>wV"
import org.rut.util.algorithm.support.SelectionSort; xEBjfn
import org.rut.util.algorithm.support.ShellSort; Q^k#?j#
(gZ!o_
/** !2Orklzd1
* @author treeroot A0XFu}
* @since 2006-2-2 U,=K_oBAq
* @version 1.0 x6t;=
*/ |^F-.Z
public class SortUtil { eZ!k'bS=
public final static int INSERT = 1; Vo%d;>!G\;
public final static int BUBBLE = 2; H@zk8]_P
public final static int SELECTION = 3; _x!pMj(A
public final static int SHELL = 4; nqBuC
public final static int QUICK = 5; /\#5\dHj
public final static int IMPROVED_QUICK = 6; 8syo_sC |
public final static int MERGE = 7; @K9T )p]
public final static int IMPROVED_MERGE = 8; No7Q,p
public final static int HEAP = 9; Y[!a82MTzn
]Q3Gj@6
public static void sort(int[] data) { 8VZ-`?p
sort(data, IMPROVED_QUICK); zCHr
} x3Ud0[(
private static String[] name={ kslN_\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P5>CSWy%
}; TI>yi ^}
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private static Sort[] impl=new Sort[]{ @>Keu\)
new InsertSort(), x}{VHp`|ld
new BubbleSort(), h,x]
new SelectionSort(), fDd!Mt
new ShellSort(), <IVz mzpL
new QuickSort(), yShHFlO=
new ImprovedQuickSort(), !A!\S/x4
new MergeSort(), R%%`wmG)"
new ImprovedMergeSort(), h uJqqC
new HeapSort() q}5A^QX
}; R*X2Z{n
mw[4<vfB0a
public static String toString(int algorithm){ +a/o)C{
return name[algorithm-1]; {Fi@|'
} :j~5(K"
7mM;Q
public static void sort(int[] data, int algorithm) { O[!o1.
impl[algorithm-1].sort(data); %U GlAyj
} vNC0M:p,
]D%k)<YK
public static interface Sort { N-gRfra+8L
public void sort(int[] data); 6<Z:Xw
} [fp"MPP3
blcKtrYg
public static void swap(int[] data, int i, int j) { vgj^-
int temp = data; 9#<Og>t2y
data = data[j]; 5-^%\?,x
data[j] = temp; ~8*oGG~s
} "NU".q
} @@wx~|%