[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; ?$.x%G+
} Qt.|YB8
int i1=l; |>Pz#DCy
int i2=mid+1; ZDx1v_xr
for(int cur=l;cur<=r;cur++){ g5lK&-yu]
if(i1==mid+1) FYIz_GTk
data[cur]=temp[i2++]; GC7W7B
else if(i2>r) yi*EE%
data[cur]=temp[i1++]; (&Mv!6]
else if(temp[i1] data[cur]=temp[i1++]; K)GpQ|4:<
else ?^WX]SAl
data[cur]=temp[i2++]; 5V8`-yO9
} tY%T
} TUq ,
-q&7q
} X/FRe[R
V(;c#%I2
改进后的归并排序: DWupLJpk;c
+do*C=z
package org.rut.util.algorithm.support; GjyTM
z[l_<`J$9
import org.rut.util.algorithm.SortUtil; ^f9>tI{
`$XgfMBf |
/** {m/KD 'b_
* @author treeroot ce7$# #f
* @since 2006-2-2 Q}|0
* @version 1.0 8@r>`c
*/ !im%t9
public class ImprovedMergeSort implements SortUtil.Sort { wU-Cb<^
zICAV -&
private static final int THRESHOLD = 10; q@i.4>x
6W9lKD_i
/* /$^SiE+N
* (non-Javadoc) ]l^"A~va
* zqxN/H]z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <SiJA`(7
*/ Lw`}o`D
public void sort(int[] data) { uTvf[%EHW
int[] temp=new int[data.length]; 0u bf]Z
mergeSort(data,temp,0,data.length-1); SK5__Ix
} zvwv7JtB
&/?OP)N,}
private void mergeSort(int[] data, int[] temp, int l, int r) { BiA^]h/|
int i, j, k; K0\`0E^,
int mid = (l + r) / 2; kH?PEA! \
if (l == r) Ymm*p,`
return; _ygdv\^Tet
if ((mid - l) >= THRESHOLD) !'Ww%ZL\
mergeSort(data, temp, l, mid); .J?RaH{i
else ik5"9b-\<
insertSort(data, l, mid - l + 1); I5E+=.T*ar
if ((r - mid) > THRESHOLD) et<@3wyd]
mergeSort(data, temp, mid + 1, r); ]F #0to
else f{U,kCv
insertSort(data, mid + 1, r - mid); ?f*>=;7=
j-v/;7s/B
for (i = l; i <= mid; i++) { Sg1,9[pb
temp = data; ;}'Z2gZB
} Q}uh`?t
for (j = 1; j <= r - mid; j++) { wsgT`M'J[
temp[r - j + 1] = data[j + mid]; Yu:($//w
} o(D6
int a = temp[l]; M $zt;7P|
int b = temp[r]; rB_ESNx
for (i = l, j = r, k = l; k <= r; k++) { Mo\nY5
if (a < b) { ([]\7}+8
data[k] = temp[i++]; gB0Q0d3\G,
a = temp; M7ug< 8i
} else { [ZD`t,x(
data[k] = temp[j--]; X/H2c"!t
b = temp[j]; )2J#pz?.
} zLg_0r*h1
} pIY3ft\
} ceAefKdb
Ryn@">sVI
/** hA+;eXy/
* @param data M1I4Ot
* @param l tDtqTB}
* @param i Qm4cuV-0{
*/ 5Zl7crA[
private void insertSort(int[] data, int start, int len) { z5W;-sCz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J7k=5Fqej;
} zwK$ q=-:
} W3&~[DS@~
} Ox6^=D"
} TSj)XU {W
aZCxyoh+
堆排序： D!D}mPi[
1~[GGl
package org.rut.util.algorithm.support; $it>*%
wD SSgk
import org.rut.util.algorithm.SortUtil; Y^gIvX
j&0t!f.Rv
/** <<6gsKP
* @author treeroot fa,;Sw
* @since 2006-2-2 ~TjTd
* @version 1.0 `!.c_%m2
*/ d{DBG}/Yg
public class HeapSort implements SortUtil.Sort{ x)T07,3:
U!T#'H5'-
/* (non-Javadoc) 6+Y@dJnPT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EI@ep~
*/ kv`5"pa7M
public void sort(int[] data) { +'UxO'v3]
MaxHeap h=new MaxHeap(); t_Ul;HVPS
h.init(data); }TU2o3Q
for(int i=0;i h.remove(); o+?Ko=vYw
System.arraycopy(h.queue,1,data,0,data.length); /_r{7Gq.
} a2H_8iQ!
Q]-r'pYr
private static class MaxHeap{ =GLMdhD]
s_76)7
void init(int[] data){ I2C1mV
this.queue=new int[data.length+1]; 5S4`.'
for(int i=0;i queue[++size]=data; >|JMvbje
fixUp(size); sE0,b
} 7` t,
} OgkbN`
eb<'>a
private int size=0; g=s2t"&
;+Mr|vweTC
private int[] queue; DkBVk+
e3kdIOu5
public int get() { IE&G7\>(yO
return queue[1]; [q!)Y:|u_>
} IF3V5Q
_x?S0R1
public void remove() { m\ /V0V\
SortUtil.swap(queue,1,size--); \>4x7mF!
fixDown(1); WI54xu1M
} *JVJKqed
file://fixdown .T}S[`Yx5
private void fixDown(int k) { dNz!2mbO
int j; |R(rb-v
while ((j = k << 1) <= size) { r'u[>uY
if (j < size %26amp;%26amp; queue[j] j++; 8C2!Wwz`J8
if (queue[k]>queue[j]) file://不用交换 VB{G%!}
break; Fr9_!f
SortUtil.swap(queue,j,k); FBrJVaF
k = j; )F:UkS
} eXMl3Lxf
} C-ipxL"r
private void fixUp(int k) { HO;,Ya^l
while (k > 1) { 1iE*-K%Q
int j = k >> 1; k!m9 l1x
if (queue[j]>queue[k]) K|-RAjE
break; [E/8E h<
SortUtil.swap(queue,j,k); z#sSLE.$Z
k = j; P4~C0z
} N9cUlrDO
} O)G^VD s
Zh.[f+l]
} P3V}cGZ
}L|XZL_Jo#
} S|ADu]H(
(+0yZ7AZ
SortUtil： wGnFDkCNz
u/L\e.4
package org.rut.util.algorithm; S31+ j:"
G-sA)WOF
import org.rut.util.algorithm.support.BubbleSort; y&+Sp/6BYA
import org.rut.util.algorithm.support.HeapSort; 44cy_
import org.rut.util.algorithm.support.ImprovedMergeSort; XJi^gTN
import org.rut.util.algorithm.support.ImprovedQuickSort; @0q*50
import org.rut.util.algorithm.support.InsertSort; l&v&a!EU
import org.rut.util.algorithm.support.MergeSort; ZNG{:5u,
import org.rut.util.algorithm.support.QuickSort; [7SR2^uf<j
import org.rut.util.algorithm.support.SelectionSort; ,]-A~^|
import org.rut.util.algorithm.support.ShellSort; {siIRl2&
C@s;0-qL
/** d<4q%y'X{
* @author treeroot 8VZLwhj
* @since 2006-2-2 OPVcT
* @version 1.0 XRR`GBI
*/ X7& ^"|:
public class SortUtil { Y/< ],1U
public final static int INSERT = 1; QOY M/1U
public final static int BUBBLE = 2; 8&9'1X5)8_
public final static int SELECTION = 3; d512Y[ R
public final static int SHELL = 4; %q 7gl;'
public final static int QUICK = 5; n+uDg
public final static int IMPROVED_QUICK = 6; h^"OC$
public final static int MERGE = 7; ?BnjtefIe
public final static int IMPROVED_MERGE = 8; 3L(vZ2&
public final static int HEAP = 9; Qz/1^xy
{H%1sI
public static void sort(int[] data) { ;]Bkw6o
sort(data, IMPROVED_QUICK); `@|Kx\y4=j
} ?AJE*=b
private static String[] name={ 0^rDf L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tXnD>H YV
}; 6,;7iA]
FrryZe=
private static Sort[] impl=new Sort[]{ H:M;H=0
new InsertSort(), xu7Q^F#u
new BubbleSort(), S?Z"){
new SelectionSort(), vS'5Lm
new ShellSort(), ,\n%e'
new QuickSort(), ,BG L|5?3z
new ImprovedQuickSort(), Vtr5<:eEx
new MergeSort(), kI>PaZ`i)
new ImprovedMergeSort(), ThSB\
new HeapSort() YE\s<$
}; EAM2t|MG.
YX:[],FP
public static String toString(int algorithm){ Kwa$5qZI
return name[algorithm-1]; -Lbi eS%
} s0x;<si_
#y&O5
public static void sort(int[] data, int algorithm) { L@HWm;aN
impl[algorithm-1].sort(data); n:wZL&ZV0
} s>^$: wzu
!q_fcd^c
public static interface Sort { 3fWL}]{<a
public void sort(int[] data); h\i>4^]X.
} D#G(&<Q
Lcpz(W^
public static void swap(int[] data, int i, int j) { Xi!`+N4
int temp = data; h^$c
data = data[j]; VDP \E<3"
data[j] = temp; 2{o eJ
} 5?n@.hcL
} @"=wn:O+