[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; '@p['#\uI
} v'VD0+3[H
int i1=l; &z>e5_.
int i2=mid+1; 6xWe=QGE
for(int cur=l;cur<=r;cur++){ ANJ$'3tg
if(i1==mid+1) :Qumb
data[cur]=temp[i2++]; >iD )eB
else if(i2>r) pV20oSJNt
data[cur]=temp[i1++]; MKy[hT:
else if(temp[i1] data[cur]=temp[i1++]; zY,r9<I8_x
else )6+eNsxMlC
data[cur]=temp[i2++]; >c9a0A
} nx8a$vI-TY
} PIH*Rw*GKZ
Z0o~+Ct$
} /G5d|P
|_`E1Y}}
改进后的归并排序: R$[#+X!
h&`e) a>+
package org.rut.util.algorithm.support; Hz.(qW">5*
5$wpL(:R(
import org.rut.util.algorithm.SortUtil; y>72{
DTaN"{
/** 89\n;5'f4
* @author treeroot Ytz)d/3T
* @since 2006-2-2 zY|t0H
* @version 1.0 `0P$#5?
*/ #;%JT
public class ImprovedMergeSort implements SortUtil.Sort { s}jHl8
F'B8v3
private static final int THRESHOLD = 10; J]&y$?C
4F{)i
/* LM7$}#$R
* (non-Javadoc) `FYv3w2
* XVKfl3'%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qW!]co
*/ s<oNE)xe
public void sort(int[] data) { NR -!VJQ
int[] temp=new int[data.length]; %!du,2
mergeSort(data,temp,0,data.length-1); ^@qvl%j
} Y}uCP1v
*d"DA[(
private void mergeSort(int[] data, int[] temp, int l, int r) { +m8!U=Zi
int i, j, k; &_~+(
int mid = (l + r) / 2; m|=H#
if (l == r) q{t*34R
return; NX|v=
if ((mid - l) >= THRESHOLD) [k6nW:C
mergeSort(data, temp, l, mid); [ { bV4
else ADpmvW f?
insertSort(data, l, mid - l + 1); du)~kU>l
if ((r - mid) > THRESHOLD) jBU4F~1y
mergeSort(data, temp, mid + 1, r); M@?xa/E64
else p;W.lcO`0
insertSort(data, mid + 1, r - mid); DdVF,
kAu+zX>S+
for (i = l; i <= mid; i++) { pek%08VSEU
temp = data; wi4=OU1L)a
} 1RK=,Wx
for (j = 1; j <= r - mid; j++) { ?r?jl;A&
temp[r - j + 1] = data[j + mid]; UN zlN
} -5T=:2M
int a = temp[l]; iVd.f A
int b = temp[r]; (cN}Epi(D
for (i = l, j = r, k = l; k <= r; k++) { c05%iv
if (a < b) { rk7QZVE
data[k] = temp[i++]; R,|d`)T
a = temp; G(~;]xNW+
} else { r8,romE$
data[k] = temp[j--]; x\J#]d.
b = temp[j]; /\H>y
} r=6v`)Qr
} w~ [b*$
} 'A:x/iv}^
DqX{'jj
/** h=(DX5:A
* @param data F0:A]`|
* @param l I =1+h
* @param i :dLAs@z
*/ ds&e|VSH;
private void insertSort(int[] data, int start, int len) { ]ut5S>,"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `&-Mi[1
} 8Goh4T H
} 3"G>>nC&
} 8HRmQ
} e0J6Ae4V[
z,VD=Hnz
堆排序： LrATSq@
Ma+$g1$
package org.rut.util.algorithm.support; bks/`rIA
"m^' &L
import org.rut.util.algorithm.SortUtil; ^`G`phd$
TEMw8@b
/** 1P(|[W1
* @author treeroot ,}:G\u*Fu
* @since 2006-2-2 wbe<'/X+
* @version 1.0 2 ho>eRX
*/ )=-0M9e.{
public class HeapSort implements SortUtil.Sort{ J]q%gcM
7{xh8#m
/* (non-Javadoc) k<cgO[m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #hlCs
*/ ^k Cn*&
public void sort(int[] data) { aM{xdTYaU
MaxHeap h=new MaxHeap(); &m[Qn!>i6
h.init(data); WyZL9K{?
for(int i=0;i h.remove(); r)i>06Hd
System.arraycopy(h.queue,1,data,0,data.length); PI*82,f3dE
} &R$CZU
@fa@s-wb
private static class MaxHeap{ j~FD{%4N
STglw-TC\
void init(int[] data){ 3LfC{ER
this.queue=new int[data.length+1]; in(U:04
for(int i=0;i queue[++size]=data; zLF?P3^
fixUp(size); m~dC3}e8/?
} 8@PX7!9
} TARXx>
(%U@3._
private int size=0; E"L2&.
1Jj Y!
private int[] queue; CEC nq3
YFTjPBV
public int get() { ;r6jx"i
return queue[1]; tw(JZDc
} [2dn\z28
HFqm6|
public void remove() { 4<x'ocKlD
SortUtil.swap(queue,1,size--); /'hCi]b@v
fixDown(1); \T;\XAGr
} ru`U'
file://fixdown 9W8]8sUeG
private void fixDown(int k) { %J8|zKT5t
int j; <&!v1yR
while ((j = k << 1) <= size) { 7Su#Je]
if (j < size %26amp;%26amp; queue[j] j++; *A~ G_0B
if (queue[k]>queue[j]) file://不用交换 ;3 F"TH
break; >+mD$:L
SortUtil.swap(queue,j,k); )NO<s0?&
k = j; MgC:b-&5_
} T<I=%P)
} m] W5+
private void fixUp(int k) { cS.-7
while (k > 1) { !gLkJ)
int j = k >> 1; dVQ-k
if (queue[j]>queue[k]) RID]pek
break; fl;s9:<
SortUtil.swap(queue,j,k); jA(>sz
k = j; zSE<"(a
} :=9]c17=
} }'OHE(s
fRfn2jA)d
} .^bft P\
5qf BEPJ
} zvvP81$W
;r/;m\V
SortUtil： =E&OuX-R
'SYo_!
package org.rut.util.algorithm; [|~2X>
9z I.pv+]
import org.rut.util.algorithm.support.BubbleSort; `y+-H|%?
import org.rut.util.algorithm.support.HeapSort; WO6/X/#8b
import org.rut.util.algorithm.support.ImprovedMergeSort; Lw'9
import org.rut.util.algorithm.support.ImprovedQuickSort; bT6sb#"W
import org.rut.util.algorithm.support.InsertSort; )XfzLF7
import org.rut.util.algorithm.support.MergeSort; J>^\oAgpE
import org.rut.util.algorithm.support.QuickSort; f""`cdqAOh
import org.rut.util.algorithm.support.SelectionSort; ms_ VM>l
import org.rut.util.algorithm.support.ShellSort; `+#G+Vu5
xBFJ} v
/** a,Gxm!
* @author treeroot %hN.ktZ/s
* @since 2006-2-2 zd]D(qeX
* @version 1.0 TrdZJ21#M
*/ {u[V{XIUh
public class SortUtil { %Rh;=p`
public final static int INSERT = 1; -AYA~O(&
public final static int BUBBLE = 2; !WkIi^T
public final static int SELECTION = 3; 3@n>*7/E
public final static int SHELL = 4; &/A8-:m
public final static int QUICK = 5; 1G7b%yPA
public final static int IMPROVED_QUICK = 6; < pTTo
public final static int MERGE = 7; 3jogD
public final static int IMPROVED_MERGE = 8; E1&b#TE6O
public final static int HEAP = 9; rtQHWRUn
0GDvwy D1
public static void sort(int[] data) { .P$IJUYO
sort(data, IMPROVED_QUICK); I5AO?BzJ
} T<-=nX
private static String[] name={ ?4CNkk=v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Cv)/7vyB8
}; (]*H[)F/
q4UA]+-*
private static Sort[] impl=new Sort[]{ =N);v\ Q$!
new InsertSort(), O9(r{Vu7u
new BubbleSort(), `Y40w#?uW
new SelectionSort(), 0)m8)!gj
new ShellSort(), LwuF0\
new QuickSort(), .bD_R7Bi6
new ImprovedQuickSort(), U Q@7n1
new MergeSort(), YHV-|UNF
new ImprovedMergeSort(), (!5LW'3B
new HeapSort() K~RoUE<3[
}; /?/#B `
B`$L'
public static String toString(int algorithm){ +KEkmXZ
return name[algorithm-1]; E^hHH?w+
} k#}g,0@
HftxS
public static void sort(int[] data, int algorithm) { !5}l&7:(MN
impl[algorithm-1].sort(data); JIO$=+p
} #(LfYw.P1V
O;[9_[
public static interface Sort { dz#5q-r
public void sort(int[] data); kHc<*L_V
} %OcGdbs
Oq(VvS/
public static void swap(int[] data, int i, int j) { he+#Q6
int temp = data; _kFYBd
data = data[j]; l_/C65%.:
data[j] = temp; qJR!$?
} iO1nwl !#
} aH_6s4+: