[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; WrxP
} d"*uBVzXm
int i1=l; --HZX
int i2=mid+1; H Y&DmE
for(int cur=l;cur<=r;cur++){ [S9K6%w_!
if(i1==mid+1) ;5S9y7[i|
data[cur]=temp[i2++]; 1Z+8r
else if(i2>r) W14 J],{L
data[cur]=temp[i1++]; 8<pzb}xK
else if(temp[i1] data[cur]=temp[i1++]; p6#g;$V$
else i1NY9br
data[cur]=temp[i2++]; D%OQ e#!
} |y!=J$$_H
} /v1Q4mq
CYs,`
} fzb29 -
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改进后的归并排序: [65`$x-
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package org.rut.util.algorithm.support; ao1(]64X"
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import org.rut.util.algorithm.SortUtil; "55skmD.P
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/** *`ua'"="k
* @author treeroot dJeNbVd
* @since 2006-2-2 {JZZZY!n2
* @version 1.0 Tc>
*/ .w=/+TA
public class ImprovedMergeSort implements SortUtil.Sort { :cem,#(=
cu7hBfj
private static final int THRESHOLD = 10; ([T>.s
=.f-w0V
/* ;c-(ObSm
* (non-Javadoc) #~}nFY.
* Wuc S:8#|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e6R}0w~G
*/ _~IR6dKE
public void sort(int[] data) { "7'J&^|
int[] temp=new int[data.length]; R_W+Ylob
mergeSort(data,temp,0,data.length-1); *4Thd:7 `
} =n5zM._S-
#%iDT6
private void mergeSort(int[] data, int[] temp, int l, int r) { eL10Q(;P`
int i, j, k; : UGZ+
int mid = (l + r) / 2; Bu<M\w?7Y
if (l == r) 42_`+Vt]d7
return; ;f0I 8i,JN
if ((mid - l) >= THRESHOLD) "pi=$/RD9
mergeSort(data, temp, l, mid); X$ 0?j1
else u]<,,
insertSort(data, l, mid - l + 1); 5nv#+ap1 "
if ((r - mid) > THRESHOLD) C%$edEi
mergeSort(data, temp, mid + 1, r); [')m|u~FS4
else "CSsCA$/
insertSort(data, mid + 1, r - mid); A-Sv;/yD_
QUq_:t+Dv
for (i = l; i <= mid; i++) { h58`XH
temp = data; Zd^rNHhA
} ,&]S(|2%>t
for (j = 1; j <= r - mid; j++) { rdl;M>0@
temp[r - j + 1] = data[j + mid]; y I HXg#
} AK,J7
int a = temp[l]; Su 586;\
int b = temp[r]; #I{h\x><?
for (i = l, j = r, k = l; k <= r; k++) { :1cV;gJ
if (a < b) { gn8R[5:!V
data[k] = temp[i++]; Ygm`ZA y
a = temp; 3KRd
} else { b3&zjjQ
data[k] = temp[j--]; ?]|\4]zV
b = temp[j]; / ;$#d}R
} {C 6=[
} iEVb"w059
} x5,++7Tz
w k(VR
/** q MfT>rH
* @param data V]|^&A_c
* @param l 3 R=,1<
* @param i `YFtL
*/ 4x{0iav
private void insertSort(int[] data, int start, int len) { 5L+>ewl
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oRm L {UDZ
} 0LPig[
} 3QV*%
} v~f HYa>
} A;;fACF8e
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堆排序： [;r)9mh7
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package org.rut.util.algorithm.support; H7z,j}l
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import org.rut.util.algorithm.SortUtil; _7Rr=_1}
<6EeD5{*
/** F|d\k Q
* @author treeroot eV2W{vuI
* @since 2006-2-2 RJL2J]*S
* @version 1.0 8ZM?)#`@{
*/ .GsV>H
public class HeapSort implements SortUtil.Sort{ NTdixfR
mPOGidxix
/* (non-Javadoc) #^`4DhQ/ 1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^`*9QjY
*/ 3VsW@SG7N
public void sort(int[] data) { bV(Y`g
MaxHeap h=new MaxHeap(); G<At_YS
h.init(data); *S]Ci\{_
for(int i=0;i h.remove(); AJf4_+He
System.arraycopy(h.queue,1,data,0,data.length); n(b(yXYm]
} zO~8?jDN4|
@XgKYm
private static class MaxHeap{ vL|SY_:4
V^7V[(~`
void init(int[] data){ xO$lsZPG
this.queue=new int[data.length+1]; D2<fw#
for(int i=0;i queue[++size]=data; VeGL)
fixUp(size); {%<OD8>p
} #D<C )Q
} k&&2Tq
I CZ4A{I
private int size=0; 9)y/:sO<P
qmnZAk
private int[] queue; QP@%(]fG
rx $mk
public int get() { Qt iDTr
return queue[1]; :?k>HQe
} RS"H8P4W
_p#CwExuy
public void remove() { V_C-P[2~
SortUtil.swap(queue,1,size--); Ipf|")*
fixDown(1); -u&6X,Oq\u
} IM:=@a{
file://fixdown 0]>u)%
private void fixDown(int k) { NS9B[*"Jl
int j; hhSy0
while ((j = k << 1) <= size) { q`|LRz&al
if (j < size %26amp;%26amp; queue[j] j++; +J_c'ChN
if (queue[k]>queue[j]) file://不用交换 6Se?sHC>
break; ZtV9&rd7
SortUtil.swap(queue,j,k); ;lq;X{/
k = j; TK5K_V*7
} `Y BC
} I'\kFjc
private void fixUp(int k) { QZ4v/Ou
while (k > 1) { x1Lb*3Fe
int j = k >> 1; LG-y]4a}
if (queue[j]>queue[k]) wQv'8A_}
break; ie;]/va
SortUtil.swap(queue,j,k); bsuus R9W
k = j; So{x]x:f
} 'Hc-~l>D
} .EpV;xq}
Cnnh7`
} ^:6{22C{
WxW7qt
} ~;Ov-^tp
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SortUtil： ML:Q5 ^`
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package org.rut.util.algorithm; ?bPRxR
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import org.rut.util.algorithm.support.BubbleSort; ]NjX?XdX<
import org.rut.util.algorithm.support.HeapSort; |w_7_J2
import org.rut.util.algorithm.support.ImprovedMergeSort; x6(~;J
import org.rut.util.algorithm.support.ImprovedQuickSort; t]>Lh>G
import org.rut.util.algorithm.support.InsertSort; &Q+Ln,(&L
import org.rut.util.algorithm.support.MergeSort; z|=}1;(.
import org.rut.util.algorithm.support.QuickSort; \x)n>{3C
import org.rut.util.algorithm.support.SelectionSort; anIAM
import org.rut.util.algorithm.support.ShellSort; kz{/(t
aJYgzr,
/** nNrPHNfqD
* @author treeroot -9"['-WH,
* @since 2006-2-2 eL^.,H0
* @version 1.0 .zS?9MP
*/ D-8O+.@
public class SortUtil { GMMp|WV|
public final static int INSERT = 1; /3A^I{e74
public final static int BUBBLE = 2; VGtC)mG8)
public final static int SELECTION = 3; +lJG(Qd
public final static int SHELL = 4; 7#@cz5Su
public final static int QUICK = 5; Xua+cVc\y
public final static int IMPROVED_QUICK = 6; yMyE s8
public final static int MERGE = 7; -M%_\;"de
public final static int IMPROVED_MERGE = 8; O?U'!o=
public final static int HEAP = 9; $}lbT15a
<.pU,T/
public static void sort(int[] data) { [PQ?#:r
sort(data, IMPROVED_QUICK); K3m]%m2\
} G:<`moKgL
private static String[] name={ )_mr! z(S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KC(xb5x Y
}; U Z.=aQ}M
j;s"q]"x]
private static Sort[] impl=new Sort[]{ ~\=1'D^6CK
new InsertSort(), /J04^6
new BubbleSort(), BDVHol*g
new SelectionSort(), zXv3:uRp.
new ShellSort(), ~vXaqCX
new QuickSort(), T32+3wb"I
new ImprovedQuickSort(), _Dym{!t
new MergeSort(), A$#p%yb
new ImprovedMergeSort(), 6fd+Q /
new HeapSort() Z-E`>
}; *GxTX3i}vc
jov:]Bic
public static String toString(int algorithm){ }| J79s2M
return name[algorithm-1]; {Z3dF)>
} F;=4vS]\
"`M?R;DH
public static void sort(int[] data, int algorithm) { >tO`r.5u9
impl[algorithm-1].sort(data); nA P.^_K
} Q2zjZC*'%
} @K FB
public static interface Sort { B*4}GPQ
public void sort(int[] data); x%+aKZ(m)
} ?_"+^R z
j7sKsbb
public static void swap(int[] data, int i, int j) { 0G7K8`a
int temp = data; u}!@ ,/)
data = data[j]; 'd+NVj{C
data[j] = temp; _^el\
} 0$7s^?G0
} COTp