[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; F B?UZ
} ;Ra+=z}>
int i1=l; [8Qro8
int i2=mid+1; TQ{Han!
for(int cur=l;cur<=r;cur++){ }|5VRJA
if(i1==mid+1) -T&.kYqnb$
data[cur]=temp[i2++]; -i4&v7"
else if(i2>r) =egW
data[cur]=temp[i1++]; I!>\#K
else if(temp[i1] data[cur]=temp[i1++]; {X[ HCfJd
else Ux#x#N
data[cur]=temp[i2++]; *P 3V
} `ORECg)
} e"'#\tSG
E\IlF 6
} !'j?.F$}
K-f1{ 0
改进后的归并排序: +,yK;^b
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package org.rut.util.algorithm.support; yuDZ~0]R
K"b`#xN(t
import org.rut.util.algorithm.SortUtil; ZR$'u%+g'
1fo U
/** rp6q?3=g
* @author treeroot +&Hr4@pgW
* @since 2006-2-2 jMbC Y07v
* @version 1.0 o$[z],RO
*/ Pl<;[cB
public class ImprovedMergeSort implements SortUtil.Sort { u{FDdR9<
E[O<S B I
private static final int THRESHOLD = 10; zCOgBT~p
X^\>:<
/* YKbaf(K)9
* (non-Javadoc) P%#*-zCCx
* Vpr/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KAsS[
*/ *1 G>YH
public void sort(int[] data) { GEEW?8
int[] temp=new int[data.length]; uA$<\fnz
mergeSort(data,temp,0,data.length-1); m85WA # `
} ?x+Z)`w_
wtT}V=_
private void mergeSort(int[] data, int[] temp, int l, int r) { &z]K\-xp
int i, j, k; etoo #h"]1
int mid = (l + r) / 2; kl"+YF5/
if (l == r) "*;;H^d
return; Z0`T\ay
if ((mid - l) >= THRESHOLD) ;L|uIg;.s
mergeSort(data, temp, l, mid); +uBLk0/)>
else 2_ :n
insertSort(data, l, mid - l + 1); P\]B<
if ((r - mid) > THRESHOLD) 70lfb`
mergeSort(data, temp, mid + 1, r); U,+[5sbo
else v^ /Q 8Q
insertSort(data, mid + 1, r - mid); .AYj'Y
RN)dS>$
for (i = l; i <= mid; i++) { 3SSm5{197
temp = data; .e'eE
} 6Z`R#d #I
for (j = 1; j <= r - mid; j++) { n!')wIk
temp[r - j + 1] = data[j + mid]; 5C"QE8R o
} <5G{"U+ \
int a = temp[l]; .`7cBsXH
int b = temp[r]; d/}SAvtt
for (i = l, j = r, k = l; k <= r; k++) { etd&..]J
if (a < b) { *26334B.R
data[k] = temp[i++]; rJa$9B*^
a = temp; "+zCS|
} else { sP-^~ pp
data[k] = temp[j--]; @]qBF]6
b = temp[j]; XxDaz1
} _:+ KMR
} O:{U^K:*
} DAwqo.m
Yk42(!
/** ?x^z]N|P
* @param data ~V/?H!r'{}
* @param l 2kv7UU#q2
* @param i `)qVF,Z}
*/ DfV~!bY
private void insertSort(int[] data, int start, int len) { oG7q_4+&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wBQF~WY
} * ,v|y6
} jqH3J2L
} `]LSbS
} {QbvR*gv
hLDA]s
堆排序： NxVw!TsR
j F-v%?
package org.rut.util.algorithm.support; X[2[!)Rk
1xU3#b&2tC
import org.rut.util.algorithm.SortUtil; 6{,HiY
En&5)c+js4
/** k'$!(*]\b
* @author treeroot bln/1iS
* @since 2006-2-2 k8,?hX:
* @version 1.0 s/:Fwr4q#a
*/ p'sc0@}_O
public class HeapSort implements SortUtil.Sort{ @$"L:1_
3+J0!FVla
/* (non-Javadoc) v|ox!0:#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >a1{397Y}
*/ 4t/&.
public void sort(int[] data) { Gn)y> AN
MaxHeap h=new MaxHeap(); "lNzGi-H
h.init(data); ]I/Vbs
for(int i=0;i h.remove(); M0|'f'
System.arraycopy(h.queue,1,data,0,data.length); .)|a2d ~F
} GpbC M~x
cECi')
private static class MaxHeap{ htm{!Z]s0
YF:2>w<
void init(int[] data){ h;V,n
this.queue=new int[data.length+1]; w[_x(Ojq;
for(int i=0;i queue[++size]=data; =SD\Q!fA
fixUp(size); \<vNVz7.D
} fbFX4?-
} - O"i3>C
-Q;#sJ?
private int size=0; i)Lp7m z
s cdtWA
private int[] queue; )' xETA
*?yJkJ"
public int get() { .+y>8h3{
return queue[1]; Wk^RA_
} l{ex?
M}0eu(_|
public void remove() { M,3wmW&d6
SortUtil.swap(queue,1,size--); FFEfp.T1M
fixDown(1); hNXBVIL<&
} W9t"aZor
file://fixdown BIf^~jAER%
private void fixDown(int k) { ?zq+jLyo
int j; PN$ .X"D8
while ((j = k << 1) <= size) { m}$+Hdk+7
if (j < size %26amp;%26amp; queue[j] j++; tvX>{-M
if (queue[k]>queue[j]) file://不用交换 Fv?=Z-wk
break; j%<}jw[2
SortUtil.swap(queue,j,k); 6AN)vs}
k = j; # x>ga
} Rq~t4sA:
} xx*2?i
private void fixUp(int k) { &X`u9 V
while (k > 1) { `ya;:$(6
int j = k >> 1; 6@tvRDeaDW
if (queue[j]>queue[k]) Ni*Wz*o
break; nzX@:7g
SortUtil.swap(queue,j,k); ~un%4]U
k = j; tLm867`c7
} gLL-VvJ[
} r^HAaGpC
j2h[70fWC
} SW(q$i
DhI>p0* T
} *.f2VQ~H
>+cVs:
SortUtil： <Wl(9$
,/&Zw01dGN
package org.rut.util.algorithm; d0er^ ~
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import org.rut.util.algorithm.support.BubbleSort; Snf"z8sw
import org.rut.util.algorithm.support.HeapSort; yy2Ie
import org.rut.util.algorithm.support.ImprovedMergeSort; # Oup^ o@
import org.rut.util.algorithm.support.ImprovedQuickSort; K&A;Z>l,v5
import org.rut.util.algorithm.support.InsertSort; i}TwOy<4s
import org.rut.util.algorithm.support.MergeSort; TUp%FJXA|
import org.rut.util.algorithm.support.QuickSort; 3Rl,GWK
import org.rut.util.algorithm.support.SelectionSort; ned2lC&'d>
import org.rut.util.algorithm.support.ShellSort; 5 HV)[us
,:v&4x&=
/** OQlG+|
* @author treeroot KA]*ox6j;
* @since 2006-2-2 yno('1B@
* @version 1.0 E@QA".
*/ |bZM/U=
public class SortUtil { m.%`4L^`T
public final static int INSERT = 1; Aq#/2t
public final static int BUBBLE = 2; #y"=Cz=1u7
public final static int SELECTION = 3; ,*,sw:=2
public final static int SHELL = 4; $*~Iu%Az
public final static int QUICK = 5; (N~$x
public final static int IMPROVED_QUICK = 6; ^E>CGGS4
public final static int MERGE = 7; ['X[qn
public final static int IMPROVED_MERGE = 8; {LE&ylE
public final static int HEAP = 9; "Q+83adY4x
s<T?pH
public static void sort(int[] data) { ((DzUyK
sort(data, IMPROVED_QUICK); X=p"5hhfn
} $v;dV@tB
private static String[] name={ P-z`c\Rt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S;@ay/*~
}; EU`T6M
{_ V0
private static Sort[] impl=new Sort[]{ "/x_>ui1F
new InsertSort(), whc[@Tyx
new BubbleSort(), x%BF{Sw
new SelectionSort(), Yx?aC!5M
new ShellSort(), @Gjny BJ
new QuickSort(), ?{J!#`tfV
new ImprovedQuickSort(), :.IN?X
new MergeSort(), }VRvsZ
new ImprovedMergeSort(), 9zKBO* p`
new HeapSort() O+.*lo
}; QocQowz
D$Kea
public static String toString(int algorithm){ @Jv# fr
return name[algorithm-1]; z%"Ai)W/{
} \SYvD y]
LPE)
public static void sort(int[] data, int algorithm) { P2k7M(I_&
impl[algorithm-1].sort(data); CJw$j`k
} L`K;IV%;
VQ |^
public static interface Sort { ]W9B6G_
public void sort(int[] data); 4~u9B/v
} K84&sSi
,ECAan/@
public static void swap(int[] data, int i, int j) { ()|3
int temp = data; 6M><(1fT
data = data[j]; `1'5j "v
data[j] = temp; 9&jPp4qG
} LdWc X`K
} >BiRk%x