[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; :z^ps0
} Sq&*K9:z
int i1=l; TR,,=3n
int i2=mid+1; (XJehdB0
for(int cur=l;cur<=r;cur++){ }(AUe5aw`G
if(i1==mid+1) jK#y7E
data[cur]=temp[i2++]; sB_o HUMH6
else if(i2>r) #D3e\(
data[cur]=temp[i1++]; ]<q{0.
else if(temp[i1] data[cur]=temp[i1++]; />XfK,c-
else $EbxV"b+
data[cur]=temp[i2++]; J.:"yK""
} +vkqig
} EH"iK2n\9
`LnLd;Z
} xTX\%s|
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改进后的归并排序: p2PD';"
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package org.rut.util.algorithm.support; []0`>rVq
j4le../N
import org.rut.util.algorithm.SortUtil; fcb:LPk;
3O<<XXar
/** qFW- ~T
* @author treeroot N{`-&8q;K
* @since 2006-2-2 ?rWqFM:hb
* @version 1.0 !h7`W*::
*/ Ly\$?3h
public class ImprovedMergeSort implements SortUtil.Sort { RMDs~
m?xzx^xs/
private static final int THRESHOLD = 10; !,Wd$UK
7|T<dfQk
/* %96JH YcX
* (non-Javadoc) {$>*~.Wu
* OekcU%C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Kwfrh?
*/ WUAjb,eo
public void sort(int[] data) { knpb$eX4
int[] temp=new int[data.length]; X#5dd.RR
mergeSort(data,temp,0,data.length-1); _< 69d
} "*#$$e53A
x2/|i?ZO
private void mergeSort(int[] data, int[] temp, int l, int r) { a2UER1Yp"
int i, j, k; TclZdk]%T
int mid = (l + r) / 2; g8mVjM\B;
if (l == r) [+gX6
return; P$2J`b[H$
if ((mid - l) >= THRESHOLD) 2Y&z}4'j
mergeSort(data, temp, l, mid); ,]~iIoTi
else 6-gxba
insertSort(data, l, mid - l + 1); 79uL"N;
if ((r - mid) > THRESHOLD) S D]d/|y
mergeSort(data, temp, mid + 1, r); IoJkM-^H&)
else 'Y6{89y
insertSort(data, mid + 1, r - mid); 1[J&^@t[h6
-hL8z$}
for (i = l; i <= mid; i++) { 5|xFY/%
temp = data; G-Z_pGer^
} 5wRDH1z@{
for (j = 1; j <= r - mid; j++) { >9F,=63A
temp[r - j + 1] = data[j + mid]; DyG3|5s1R
} 8;p6~&).C~
int a = temp[l]; 17H_>a\`
int b = temp[r]; 1@E<5rp o
for (i = l, j = r, k = l; k <= r; k++) { 1;SW%\M
if (a < b) { ;f[Ki$7
data[k] = temp[i++]; 6*kY7
a = temp; Mc~(S$FU$
} else { nq8mzI
data[k] = temp[j--]; "Z }'u2%\m
b = temp[j]; l+bP48
} }{:H0)H*
} f&H):.
} ~y_TT5+3
+uKlg#wqc
/** :74^?
* @param data Mmbb}(<
* @param l SYB } e
* @param i %#02Z%?%
*/ bU=!~W5
private void insertSort(int[] data, int start, int len) { E92dSLhs5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <y6M@(b
} :r:5a(sq
} o9#
} !V Zl<|
} :Py/d6KK
L/<^uO1
堆排序： {08UBnR
x<P$$G/
package org.rut.util.algorithm.support; s8{3~Hv
+G?4Wc1
import org.rut.util.algorithm.SortUtil; "Hg.pDNZ
:bW}*0b-
/** ]Tf.KUm
* @author treeroot mDvZ1aj
* @since 2006-2-2 KZ`d3ad
* @version 1.0 {_ww1'|A
*/ G#Nh)ff
public class HeapSort implements SortUtil.Sort{ 6fY(u7m|p
* ?rw'
/* (non-Javadoc) 4bhm1Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *r?g&Vw$m
*/ 4NQS'*%D
public void sort(int[] data) { E4HG`_cWb
MaxHeap h=new MaxHeap(); NV9D;g$Y
h.init(data); JQ%e'
for(int i=0;i h.remove(); V(=~p[
System.arraycopy(h.queue,1,data,0,data.length); -/B}XNW
} CP|N2rb
"\vEi &C
private static class MaxHeap{ 5sM-E>8G^{
' ,a'r.HJH
void init(int[] data){ WsL*P.J
this.queue=new int[data.length+1]; d&wg\"E
for(int i=0;i queue[++size]=data; O=MO M
fixUp(size); be$wGO=Ts
} G! zV=p
} %TPnC'2
Zu_m$Mx
private int size=0; xFHc+m' m~
1V+a;-?
private int[] queue; v~?d7p{
z\oq b)a
public int get() { "7JO~T+v
return queue[1]; S@z$,}Yc`<
} d\3L.5]X
xQ* U9Wt;T
public void remove() { )T(xQ2&r4
SortUtil.swap(queue,1,size--); R4_4FEo
fixDown(1); w-AF5%gX
} m%+W{N4Wb
file://fixdown 0 4x[@f`
private void fixDown(int k) { *"P :ySA
int j; Cl6y:21]K
while ((j = k << 1) <= size) { 1[[` ^v
if (j < size %26amp;%26amp; queue[j] j++; u<]-%ha$
if (queue[k]>queue[j]) file://不用交换 TCX*$ac"
break; &0It"17Ej
SortUtil.swap(queue,j,k); @7"xDgA
k = j; yj `b-^$?
} M9_ y>N[0
} mF%>pj&b
private void fixUp(int k) { H(lq=M0~
while (k > 1) { ..Zuy|?w
int j = k >> 1; 5:hajXd
if (queue[j]>queue[k]) aM9^V MOb
break; \%KJ+PJ
SortUtil.swap(queue,j,k); '6Ybf
k = j; 1wW8D>f]K
} x9a*^l
} %Fa/82:- "
RN5\,>+
} ]-bA{@tP.
.LIEZ^@
} ,LSF@1|Fx
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SortUtil： (WVN*OR?
" nq4!
package org.rut.util.algorithm; m[LIM}Gu
!<h*\%;
import org.rut.util.algorithm.support.BubbleSort; (Vf&,b@U_
import org.rut.util.algorithm.support.HeapSort; T8GxoNm
import org.rut.util.algorithm.support.ImprovedMergeSort; c;xL.
import org.rut.util.algorithm.support.ImprovedQuickSort; d}EGI
import org.rut.util.algorithm.support.InsertSort; z;zyk
import org.rut.util.algorithm.support.MergeSort; sw[1T_S>
import org.rut.util.algorithm.support.QuickSort; L oe!@c
import org.rut.util.algorithm.support.SelectionSort; o*_[3{FU
import org.rut.util.algorithm.support.ShellSort; ^W eE%"
al F*L
/** X)e6Y{vO
* @author treeroot N0O8to}V
* @since 2006-2-2 glH&v8
* @version 1.0 6^H64jM
*/ 2IFri|;-eb
public class SortUtil { ^'lx5+-
public final static int INSERT = 1; e#:.JbJ:D
public final static int BUBBLE = 2; uH^/\
public final static int SELECTION = 3; .</d$FM JE
public final static int SHELL = 4; c+f~>AaI
public final static int QUICK = 5; #|v\UJ:Pf/
public final static int IMPROVED_QUICK = 6; L}h?nWm8
public final static int MERGE = 7; ~%qHJ4C
public final static int IMPROVED_MERGE = 8; _"&b%!
public final static int HEAP = 9; Uq<c+4)5
2o] V q
public static void sort(int[] data) { .>zXz%p
sort(data, IMPROVED_QUICK); cWl
} B# |w}hj
private static String[] name={ i~@e}=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y1p^ &9U
}; "diF$Lj
`J|bGf#
private static Sort[] impl=new Sort[]{ |#D3~au
new InsertSort(), >2x[ub%$L
new BubbleSort(), Gw:8-bxS
new SelectionSort(), WNrgqyM
new ShellSort(), XpJT/&4
new QuickSort(), (@B gsY
new ImprovedQuickSort(), E y1mlW
new MergeSort(), 1&ukKy,[
new ImprovedMergeSort(), g>12!2}
new HeapSort() x~j>Lvw L
}; s]#D;i8
c/DB"_}!a
public static String toString(int algorithm){ 0.'$U}#b
return name[algorithm-1]; z2vrV?:
} OIGu`%~js
-GLI$_lLF
public static void sort(int[] data, int algorithm) { n2zJ'
impl[algorithm-1].sort(data); 26B]b{Iz{
} =H%c/Jty
v#q7hw=
public static interface Sort { -Ob'/d5&
public void sort(int[] data); i^eU!^KF
} #f0J.)M
bX6eNk-L
public static void swap(int[] data, int i, int j) { 2 DJs'"8
int temp = data; 7m~.V[l1
data = data[j]; \XFF(
data[j] = temp; +)k%jIi!
} =e=sK'NvD
} {'C PLJ{R