[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; 4GF3.?3
} "Zhh>cz
int i1=l; )uOtQ0
int i2=mid+1; #GlFm?/6K/
for(int cur=l;cur<=r;cur++){ ~Yg)8
if(i1==mid+1) +@!\3a4!
data[cur]=temp[i2++]; fXWE4^jU
else if(i2>r) BWxJ1ENM
data[cur]=temp[i1++]; As>Og
else if(temp[i1] data[cur]=temp[i1++]; )#i"hnYpQ
else 0(Y,Q(JTo&
data[cur]=temp[i2++]; *j]Bo,AC
} )e'F[
} WvT H+
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} H $Az,-P
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改进后的归并排序: KzV|::S^
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package org.rut.util.algorithm.support; &x\)] i2f
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import org.rut.util.algorithm.SortUtil; `3ha~+Goo!
]!sCWR
/** F%$q]J[
* @author treeroot km9#lK
* @since 2006-2-2 qzvht4
* @version 1.0 QnBWZUI
*/ kG5+kwV=:
public class ImprovedMergeSort implements SortUtil.Sort { $rk=#;6]v;
w=!xTA
private static final int THRESHOLD = 10; zL}`7*d:v
PPV T2;9
/* [^}bc-9?i
* (non-Javadoc) 8$]SvfX
* YI*H]V%w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G$'UK
*/ D`[@7$t
public void sort(int[] data) { q1L>nvE
int[] temp=new int[data.length]; X6Z/xb@
mergeSort(data,temp,0,data.length-1); q{
} > O?<?
+RM!j9Rq
private void mergeSort(int[] data, int[] temp, int l, int r) { OhN2FkxL
int i, j, k; Ws0)B8y,|
int mid = (l + r) / 2; f ]_ki
if (l == r) &g90q
return; DVwB}W~
if ((mid - l) >= THRESHOLD) g.!k>_g`
mergeSort(data, temp, l, mid); "AXgT[ O
else DAf@-~c
insertSort(data, l, mid - l + 1); Q.jThP`p
if ((r - mid) > THRESHOLD) -wx~*
mergeSort(data, temp, mid + 1, r); :%AEwRZ
else C:sgT6
insertSort(data, mid + 1, r - mid); %wru)
G?LC!9MB
for (i = l; i <= mid; i++) { 'lpCwH
temp = data; WQN`y>1#@_
} ?8s$RYp14
for (j = 1; j <= r - mid; j++) { >h~ik/|*
temp[r - j + 1] = data[j + mid]; r7V !M1
} 6A=k;do
int a = temp[l]; N<4 nb
int b = temp[r]; Dpu?JF]
for (i = l, j = r, k = l; k <= r; k++) { 98 NFJ
if (a < b) { *'H\`@L
data[k] = temp[i++]; m*B4a9f
a = temp; )f^^hEIS
} else { AZik:C"Q
data[k] = temp[j--]; \v=@'
b = temp[j]; K% snE7X?)
} LDU4 D
} e, 2/3jO
} 60ciI,_`
A\9LJ#E
/** 0uM&F[.x@g
* @param data -\B*reC
* @param l b|E ZD3y
* @param i UEx<;P8rP
*/ ^C~R)M:C
private void insertSort(int[] data, int start, int len) { FAc^[~E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jK[*_V
} hW!n"qU
} a @3s71
} 4bw4!z9G
} nJYIkfdA
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堆排序： EBL-+%J8
^ZS!1%1
package org.rut.util.algorithm.support; @x!+_z
,H.5TQ#
import org.rut.util.algorithm.SortUtil; h0dZr-c
-(lP8Y~gFY
/** kmu`sk"
* @author treeroot 0!0o[3*
* @since 2006-2-2 2v@B7r4}
* @version 1.0 umnQ$y 0
*/ =w`uZ;l$Q
public class HeapSort implements SortUtil.Sort{ w 2U302TZ
n`w]?bL
/* (non-Javadoc) B6Ajcfy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \k"CtzoX
*/ A*/8j\{n
public void sort(int[] data) { .:Sk=r4u\
MaxHeap h=new MaxHeap(); -nHkO&&R
h.init(data); b]xoXC6@t
for(int i=0;i h.remove(); KkpbZ7\@
System.arraycopy(h.queue,1,data,0,data.length); >O rIY
} (@!K tW
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private static class MaxHeap{ }f}?|&q
`[}X_d 1A
void init(int[] data){ }><[6Uz%
this.queue=new int[data.length+1]; 9MI9$s2y
for(int i=0;i queue[++size]=data; Z'!ORn#M
fixUp(size); {{M/=WqC
} }hg2}g99
} W4k$m2
s>\^dtG7
private int size=0; GBpdj}2=
n=$ne2/
private int[] queue; *ej< 0I{
KDGrX[L:6
public int get() { +|X`cmnuU
return queue[1]; <Ist^h+o
} a8Xwz@ M
1(>2tEjYT
public void remove() { ;;Z'd@
SortUtil.swap(queue,1,size--); Dic|n@_Fy
fixDown(1); HYT~AO-!
} $- %um
file://fixdown EN/t5d
private void fixDown(int k) { dy5}Jn%L
int j; $YY{|8@kjv
while ((j = k << 1) <= size) { 4<E <sD
if (j < size %26amp;%26amp; queue[j] j++; m`q&[:
if (queue[k]>queue[j]) file://不用交换 ewdTsgt'
break; L%\Wt1\[
SortUtil.swap(queue,j,k); iOb7g@=
k = j; 0#uB[N
} Qhc;Zl
} J#i7'9g
private void fixUp(int k) { ErJ@$&7
while (k > 1) { BV7P_!vt
int j = k >> 1; X2%(=B
if (queue[j]>queue[k]) ohe[rV>EX
break; .o C!~'
SortUtil.swap(queue,j,k); SVd@- '-K
k = j; !plu;w
} OQ wO7Z
} O_.!qk1R
qAbmQ{|w
} eu_ZsseZ
]sVWQj
} I"lzOD; eI
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SortUtil： ?r8hl.Z>
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package org.rut.util.algorithm; Qyx~={.C~
@b^$h:H
import org.rut.util.algorithm.support.BubbleSort; 7(tsmP
import org.rut.util.algorithm.support.HeapSort; .{`C>/"}
import org.rut.util.algorithm.support.ImprovedMergeSort; 5%fWX'mS
import org.rut.util.algorithm.support.ImprovedQuickSort; pO:]3qv
import org.rut.util.algorithm.support.InsertSort; C8Mx>6
import org.rut.util.algorithm.support.MergeSort; F?H=2mzKbz
import org.rut.util.algorithm.support.QuickSort; &zEBfr
import org.rut.util.algorithm.support.SelectionSort; =GF=_Ac
import org.rut.util.algorithm.support.ShellSort; h:?qd
:p]e4|R
/** i+~BVb
* @author treeroot }Kp<w,
* @since 2006-2-2 GQA\JYw|oY
* @version 1.0 rrj.]^E_~
*/ m}RZ)c
public class SortUtil { Z~-N'Lt{
public final static int INSERT = 1; Y(kf<Wo
public final static int BUBBLE = 2; >.K%W*t
public final static int SELECTION = 3; P\6:euI
public final static int SHELL = 4; a9{NAyl<oo
public final static int QUICK = 5; V!^0E.?a
public final static int IMPROVED_QUICK = 6; ."B{U_P&
public final static int MERGE = 7; SN L-6]j
public final static int IMPROVED_MERGE = 8; 2; ,8 u
public final static int HEAP = 9; &}2@pu[S?7
X~"p]V_
public static void sort(int[] data) { c6c@XdV
sort(data, IMPROVED_QUICK); o}/|"(K
} Ma$~B0!;s
private static String[] name={ l*&N<Yu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "qR, V9\
}; S!z3$@o
J+ S]Qoz
private static Sort[] impl=new Sort[]{ rQ]JM
new InsertSort(), F4z#u2~TC
new BubbleSort(), Vym0|cW
new SelectionSort(), 6z6\xkr
new ShellSort(), URbB2 Bi
new QuickSort(), Jx}-Y* o
new ImprovedQuickSort(), j_<!y(W
new MergeSort(), ysIhUpd
new ImprovedMergeSort(), aHpZhR|f$
new HeapSort() ZBY2,%nAo
}; WfG +_iP?
@Bhcb.kbq
public static String toString(int algorithm){ },JJ!3
return name[algorithm-1]; Ow4(1eE_
} E JuTv%Y8
<y^_&9
public static void sort(int[] data, int algorithm) { @/^mFqr2
impl[algorithm-1].sort(data); zN]%p>,)HB
} jTt9;?)
0!lWxS0#=
public static interface Sort { !Pnjr T
public void sort(int[] data); ! {G0'
} l}VE8-XB
^4"AWps
public static void swap(int[] data, int i, int j) { Q]N&^ E
int temp = data; 81s }4
data = data[j]; YT(Eh3ID
data[j] = temp; `=#jWZ.8m
} A7+ZY,
} JVy|SA&R