[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; Ok\X%avq
} Q[q`)~|
int i1=l; T*=*$%
int i2=mid+1; U1lqg?KO
for(int cur=l;cur<=r;cur++){ &dK!+
if(i1==mid+1) "dDrw ]P;
data[cur]=temp[i2++]; 96#]P
else if(i2>r) 7m]J7 +4
data[cur]=temp[i1++]; FY^Nn
else if(temp[i1] data[cur]=temp[i1++]; |S|'o*u
else [Y@>,B!V
data[cur]=temp[i2++]; H|wP8uQC
} ]{\M,txo8
} 1(:!6PY
<;~u@^>
} vlEW{B;)Z
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改进后的归并排序: gJrWewEe
Q@NFfJJ
package org.rut.util.algorithm.support; W-&V:S{<
10c.#9$
import org.rut.util.algorithm.SortUtil; p nI=
)78T+7Kq
/** ]cmX f
* @author treeroot uZJfIC<>
* @since 2006-2-2 iI7ocyUv
* @version 1.0 h4F%lGot
*/ 3/Z>W|w#w
public class ImprovedMergeSort implements SortUtil.Sort { ez*QP|F*9
t:vBVDkD
private static final int THRESHOLD = 10; PR$;*|@
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/* +Y~5197V
* (non-Javadoc) |K-`
* |vGHhzZ|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pgy[\t2K
*/ 6W=V8
public void sort(int[] data) { E0&d*BI2
int[] temp=new int[data.length]; fbbbTZy
mergeSort(data,temp,0,data.length-1); Dat',5
} +0UBP7kn
8 p[n>qV9
private void mergeSort(int[] data, int[] temp, int l, int r) { ,J!$Q0e
int i, j, k; /"u37f?[^
int mid = (l + r) / 2; Rq[d\BN0.d
if (l == r) Ur>1eN%9'
return; 2xX:Q'\2
if ((mid - l) >= THRESHOLD) cY_ke
mergeSort(data, temp, l, mid); fCJjFL:
else [?KGLUmTAI
insertSort(data, l, mid - l + 1); 5~:/%+F0=
if ((r - mid) > THRESHOLD) B,w ZI4oi*
mergeSort(data, temp, mid + 1, r); Ox-eB
else 0*rD'?)K+
insertSort(data, mid + 1, r - mid); b"N!#&O]
M~|7gK.m1
for (i = l; i <= mid; i++) { /9I/^i~
temp = data; 7>F{.\Z
} +>vKI8g*RH
for (j = 1; j <= r - mid; j++) { * zyik[o
temp[r - j + 1] = data[j + mid]; )hj:Xpj9#
} E BBd
int a = temp[l]; 4m1r@ $
int b = temp[r]; KAFR.h:p9
for (i = l, j = r, k = l; k <= r; k++) { ~tW~%]bs2Q
if (a < b) { mOn_#2=KF
data[k] = temp[i++]; OVe0{} j
a = temp; DyGls8<\!
} else { Uza '%R
data[k] = temp[j--]; :Z6j5V;s
b = temp[j]; TSsZzsdr2
} %KT}Map
} c:9n8skE7
} Dpw*m.f
cAEvv[
/** .\^0RyJE
* @param data Hy[: _E
* @param l M%!;5
* @param i Z}dK6h5+'
*/ bP9ly9FH
private void insertSort(int[] data, int start, int len) { NSB6 2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tn5
} G!r)N0?_f
} !ou#g5Q@z
} .=#jdc/
} $Xu3s~:S
L4g%o9G
堆排序： e;6KxvX~
K?!qNK
package org.rut.util.algorithm.support; &HM-UC|
X&qx4DL
import org.rut.util.algorithm.SortUtil; !`Rh2g*o9
/;Tc]
/** ([u|j
* @author treeroot XTJD>
* @since 2006-2-2 |0y#} |/
* @version 1.0 U@mznf* J
*/ RQx8Du<
public class HeapSort implements SortUtil.Sort{ n_e'n|T
?W'p&(;
/* (non-Javadoc) 3N+lWuE}K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cj8cV|8@
*/ m,E$KHt (
public void sort(int[] data) { +JU, ^A#X
MaxHeap h=new MaxHeap(); i U$~H
h.init(data); tUJRNEg
for(int i=0;i h.remove(); uPA (1
System.arraycopy(h.queue,1,data,0,data.length); 7mi!yTr}
} ^QRg9s,T<
|:=o\eu&
private static class MaxHeap{ /8h=6"
H0Pxw P>q
void init(int[] data){ Bvn3:+(47
this.queue=new int[data.length+1]; neDXzMxF
for(int i=0;i queue[++size]=data; `@h|+`h
fixUp(size); } p'ZMj&
} f V. c6
} WVbrbs4
-1g:3'% P
private int size=0; _95296
z*eBjHbF
private int[] queue; ATNOb
pIJXP$v3
public int get() { []>'Dw_r
return queue[1]; #&&T1;z"#
} JbMTULA
^/2I)y]W0
public void remove() { 0M_oFx
SortUtil.swap(queue,1,size--); |W">&Rb<t#
fixDown(1); %a;#]d
} =Ph8&l7~sp
file://fixdown XIHN6aQ{X
private void fixDown(int k) { {*ak>Wud
int j; e3?=1ZB
while ((j = k << 1) <= size) { ~&?bU]F
if (j < size %26amp;%26amp; queue[j] j++; Ey46JO"
if (queue[k]>queue[j]) file://不用交换 }htjT/Nm
break; >H2`4]4]
SortUtil.swap(queue,j,k); !>8~R2
k = j; 1o_kY"D<
} 1uw#;3<L
} CLb6XnkcA\
private void fixUp(int k) { wl Oeoi
while (k > 1) { a|aVc'j
int j = k >> 1; bLgH3[{
if (queue[j]>queue[k]) /:&!o2&1H
break; l>?c AB[
SortUtil.swap(queue,j,k); k*.]*]
k = j; I2ek`t]
} &|>+LP@8
} 24mdhT|
H"C'<(4*\
} ]n22+]D
_"DS?`z6
} 4`IM[DIG~
y7R#PkQ~
SortUtil： mo0\t#jA
o\AnM5
package org.rut.util.algorithm; $`=p]
f-=\qSo
import org.rut.util.algorithm.support.BubbleSort; :$5A3i
import org.rut.util.algorithm.support.HeapSort; gg;r;3u
import org.rut.util.algorithm.support.ImprovedMergeSort; Lpchla$
import org.rut.util.algorithm.support.ImprovedQuickSort; pJpapA2l*6
import org.rut.util.algorithm.support.InsertSort; jcH@*c=%e
import org.rut.util.algorithm.support.MergeSort; nR!e(
import org.rut.util.algorithm.support.QuickSort; ( ?V`|[+u
import org.rut.util.algorithm.support.SelectionSort; FqKJids-
import org.rut.util.algorithm.support.ShellSort; ;t` ?|
\INH[X#>
/** )*|/5wW1
* @author treeroot P:qmg"i@3
* @since 2006-2-2 !*IMWm>
* @version 1.0 ~}/Dl#9R!
*/ l^B.iB
public class SortUtil { E_HB[9
public final static int INSERT = 1; Qy,^'fSN
public final static int BUBBLE = 2; B~Q-V&@o
public final static int SELECTION = 3; f0Q6sVZHa
public final static int SHELL = 4; 15$xa_w}L
public final static int QUICK = 5; 30Yis_l2h
public final static int IMPROVED_QUICK = 6; bdUPo+
public final static int MERGE = 7; "}]`64?
public final static int IMPROVED_MERGE = 8; # kI>
public final static int HEAP = 9; R#(0C(FI^
F /b`[
public static void sort(int[] data) { |Lq8cA)|y
sort(data, IMPROVED_QUICK); o<2GtF1"o
} snV*gSUH
private static String[] name={ =bC +1 C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A5?"
}; <Ox[![SR
<3YZ0f f>
private static Sort[] impl=new Sort[]{ gwZ<$6
new InsertSort(), &4'<{
new BubbleSort(), 'nJF:+30ZH
new SelectionSort(), *pl6 V|
new ShellSort(), LzygupxY!
new QuickSort(), ^\)a[OWp
new ImprovedQuickSort(), HDyf]2N*N
new MergeSort(), -DDA b(2*
new ImprovedMergeSort(), xVvUx,t
new HeapSort() 0oe<=L]F
}; .{Y;6]9[
]wQ!ZG?)
public static String toString(int algorithm){ v1h(_NLI!
return name[algorithm-1]; sE9FT#iE
} 8WP>u8&
$o6/dEKQ
public static void sort(int[] data, int algorithm) { vL/ 3(Bo7
impl[algorithm-1].sort(data); X/]@EF
} C2LPLquD+
~PQ.l\C
public static interface Sort { NGra/s,9|
public void sort(int[] data); ~{c ?-qb
} ]`o5eByo
h#rP]o@
public static void swap(int[] data, int i, int j) { O--p)\
int temp = data; wak26W>I3
data = data[j]; x_PO;
data[j] = temp; q:{#kv8
} )!y>2$20 r
} l,wlxh$}(