[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; k\ I$ve"*
} hXz"}X n
int i1=l; )z/j5tnvm
int i2=mid+1; wf|CE410
for(int cur=l;cur<=r;cur++){ 2i,Jnv=sR
if(i1==mid+1) }Q\yem
data[cur]=temp[i2++]; {dMa&r|lp
else if(i2>r) f\r$T Nd6
data[cur]=temp[i1++]; HoRLy*nU
else if(temp[i1] data[cur]=temp[i1++]; 2mU}"gf[
else _xUhDu%
data[cur]=temp[i2++]; ]"/ *7NM
} ,l0s(Cg
} GExG1n-
Z#V[N9L
} `&pb`P<`
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改进后的归并排序: tCc}}2bC&
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package org.rut.util.algorithm.support; 1"v;w!uh
*,'"\n
import org.rut.util.algorithm.SortUtil; t8?+yG;
[]dRDe;#
/** cst=ms
* @author treeroot "K\Rq+si
* @since 2006-2-2 f^$\+H"W
* @version 1.0 TS UN(_XGW
*/ !kV?h5@Bo
public class ImprovedMergeSort implements SortUtil.Sort { l" sR\`~
PY>j?otD
private static final int THRESHOLD = 10; E+~~d6nB
X,y$!2QI
/* u{H_q&1
* (non-Javadoc) Pyyx/u+?@
* brTB /(E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )9<)mV*EB(
*/ "UAW
public void sort(int[] data) { %H}+'.8
int[] temp=new int[data.length]; YO,GZD`-o
mergeSort(data,temp,0,data.length-1); Pv0+`>):
} M2oKLRt)L
jXW71$B
private void mergeSort(int[] data, int[] temp, int l, int r) { w^ DAu1
int i, j, k; w6wXe_N+M
int mid = (l + r) / 2; i,)kI
if (l == r) [n:R]|^a
return; Q7DkhKT
if ((mid - l) >= THRESHOLD) Xt7uCs
mergeSort(data, temp, l, mid); |faXl3|
else .d8~]@U!<
insertSort(data, l, mid - l + 1); Y.}n,y|J}
if ((r - mid) > THRESHOLD) 5TnECk
mergeSort(data, temp, mid + 1, r); I`y}Ky<q
else *sw$OnVb
insertSort(data, mid + 1, r - mid); 3gGF?0o
JgxOxZS`@
for (i = l; i <= mid; i++) { ]0O pd9
temp = data; ml3]CcKn
} UnO -?
for (j = 1; j <= r - mid; j++) { )?_c7 R
temp[r - j + 1] = data[j + mid]; @0)bY*njj
} -bs~{
int a = temp[l]; BGA.8qWR4
int b = temp[r]; >yL8C:J9
for (i = l, j = r, k = l; k <= r; k++) { i4uUvZf
if (a < b) { QzV:^!0J
data[k] = temp[i++]; A46y?"]/30
a = temp; :ox+WY
} else { H>W A?4
data[k] = temp[j--]; 4K4?Q+?
b = temp[j]; 1YS{; y[o
} bx5X8D
} ,I)/ V>u
} 0mCrA|A.
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/** Z$+0gm\Cnw
* @param data fc&4e:Ve
* @param l XRaq\a`=:
* @param i #5'9T:8
*/ { \Q'eL8
private void insertSort(int[] data, int start, int len) { q,+d\-+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :PjHsNp;^
} s K s D
} 6{1c S
} :;]6\/ky
} ~KCOCtiD
b^FB[tZ\x
堆排序： NPKRX Li%
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package org.rut.util.algorithm.support; +]Ydf^rF
:uqsRFo&4
import org.rut.util.algorithm.SortUtil; h*&-[nSo
Joe k4t&0<
/** q(_pk&/
* @author treeroot +MXI;k_
* @since 2006-2-2 Xgc@cwd
* @version 1.0 llI`"a
*/ `&j5/[>v
public class HeapSort implements SortUtil.Sort{ a B%DIH,
HPm12&8,
/* (non-Javadoc) |WlWZ8]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qnph?t>
*/ Svy bP&i|
public void sort(int[] data) { MyAi)Mz~o
MaxHeap h=new MaxHeap(); LbvnV~S
h.init(data); (|"KsGl
for(int i=0;i h.remove(); (B]rINY|
System.arraycopy(h.queue,1,data,0,data.length); IIs'm!"Y>
} ~[isR|>
TDk'
private static class MaxHeap{ )<t5' +d%
i\2~yXw\
void init(int[] data){ .[NB"\<q
this.queue=new int[data.length+1]; G2zfdgW${/
for(int i=0;i queue[++size]=data; U"af3c^2
fixUp(size); 5fA<I _ D
} x{j|Tf3,G
} hK&jo(V
,QdUfM
private int size=0; -y)ij``VY
c54oQ1Q&"
private int[] queue; nYLq%7}k
8dNwi&4
public int get() { 6`+dP"@
return queue[1]; I|@%|sTW
} (Xi?Y/
:na9PW`TC
public void remove() { -uHD| }
SortUtil.swap(queue,1,size--); [?Wt ZM^q
fixDown(1); # 4L[8(+V
} d@<(Z7|
file://fixdown J 6D?$
private void fixDown(int k) { ?YOH9%_cs
int j; ?4P*,c
while ((j = k << 1) <= size) { {m.l{<H
if (j < size %26amp;%26amp; queue[j] j++; z:{'IY
if (queue[k]>queue[j]) file://不用交换 LJt#c+]Li
break; w$MFCJ:p&
SortUtil.swap(queue,j,k); 0,1:l3iu1M
k = j; *Fi`o_d9[`
} dgh)Rfp3
} 7Ps I'1v
private void fixUp(int k) { BqC!78Y/e
while (k > 1) { <C`qJP-
int j = k >> 1; i<@6f'Kir
if (queue[j]>queue[k]) }(4U7Ac
break; p%pM3<p
SortUtil.swap(queue,j,k); xDD3Y{K
k = j; Soy!)c]
} ;}"_hLX
} (A|Gb2X
>RZ]t[)y
} GVP"~I~/:
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} +P:xB0Tm D
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SortUtil： :8\!;!
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package org.rut.util.algorithm; uu@Y]0-
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import org.rut.util.algorithm.support.BubbleSort; 1BO$xq
import org.rut.util.algorithm.support.HeapSort; ?^t"tY
import org.rut.util.algorithm.support.ImprovedMergeSort; ofH=h
import org.rut.util.algorithm.support.ImprovedQuickSort; ^m8T$^z>
import org.rut.util.algorithm.support.InsertSort; Dvbrpn!sk
import org.rut.util.algorithm.support.MergeSort; q1}HsTnBH
import org.rut.util.algorithm.support.QuickSort; g`I`q3EF)
import org.rut.util.algorithm.support.SelectionSort; q<Gn@xc'
import org.rut.util.algorithm.support.ShellSort; e=ZwhRP
J6J[\
/** Ysbd4rN
* @author treeroot $fES06%
* @since 2006-2-2 F9@,T8I
* @version 1.0 &.J8O+
*/ INtt0Cm9"
public class SortUtil { cVya~ *
public final static int INSERT = 1; *y<Ru:D
public final static int BUBBLE = 2; __o`+^FS
public final static int SELECTION = 3; ]wFKXZeK
public final static int SHELL = 4; ?@8[1$1a
public final static int QUICK = 5; WJ":BK{NM
public final static int IMPROVED_QUICK = 6; U+:oy:mz
public final static int MERGE = 7; QFt7L
public final static int IMPROVED_MERGE = 8; 4gbi?UAmX
public final static int HEAP = 9; z(V?pHv+
D#Fe\8!l
public static void sort(int[] data) { V;0{o
sort(data, IMPROVED_QUICK); e&%m[:W:<
} |TM&:4D]^
private static String[] name={ |<tZ|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XN65bq
}; x dDR/KS
>fHg1d2-
private static Sort[] impl=new Sort[]{ &Uq++f6
new InsertSort(), o_;pEe
new BubbleSort(), pn3f{fQ
new SelectionSort(), Hbwjs?Vq?]
new ShellSort(), 9QE|p
new QuickSort(), #vh1QV!Ho
new ImprovedQuickSort(), #!V [(/
new MergeSort(), =5=D)x~
new ImprovedMergeSort(), .I\)1kjX
new HeapSort() hDaI@_86
}; DE"KbA0}
94C)63V
public static String toString(int algorithm){ bL*;6TzRK
return name[algorithm-1]; SxV(.i'
} HgL*/d
$T7hY$2Ql
public static void sort(int[] data, int algorithm) { bU'{U0lM
impl[algorithm-1].sort(data); {.F``2
} D~_|`D5WK
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public static interface Sort { kB_uU !G
public void sort(int[] data); ]=ar&1}J
} jCdKau&9
HRS|VC$tz
public static void swap(int[] data, int i, int j) { SjgF&LD
int temp = data; *4}lV8
data = data[j]; S~^0 _?
data[j] = temp; qZRx,^gd
} 04-phEA2Q
} Cr0 \7