[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; wFJ?u?b0Q
} q^hL[:ms#
int i1=l; <e&*Tx<8
int i2=mid+1; !xxu~j^T
for(int cur=l;cur<=r;cur++){ Z[{: `
if(i1==mid+1) 1RF? dv
data[cur]=temp[i2++]; )gR !G]Y
else if(i2>r) =a.avOZ
data[cur]=temp[i1++]; ^J=l] l
else if(temp[i1] data[cur]=temp[i1++]; cQMb+Q2Yw
else ard<T}|N
data[cur]=temp[i2++]; \kGi5G]
} *rk!`n&
} Mo2b"A;}|
4W''j[Y/
} ,,>b=r_r&
V5{^R+_)Ya
改进后的归并排序: Lh5d2}tcO
kWgZIkY
package org.rut.util.algorithm.support; %CP:rAd`M.
&<E*W*b[
import org.rut.util.algorithm.SortUtil; w&7-:."1i
8f<[Bu ze
/** 058+_xX
* @author treeroot Gq/f|43}@O
* @since 2006-2-2 O0gLu1*1v
* @version 1.0 iZ3%'~K<3J
*/ Q7 Clr{&
public class ImprovedMergeSort implements SortUtil.Sort { oZV=vg5Dq
=wW3Tr7~
private static final int THRESHOLD = 10; &&;ol}W
]'F{uDm[
/* |E)Es!dr
* (non-Javadoc) 'MHbXFM
* xNh#=6__9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dik+BBu5z
*/ N@>,gm@UU
public void sort(int[] data) { 8@|rB3J
int[] temp=new int[data.length]; }'KVi=qnHb
mergeSort(data,temp,0,data.length-1); VBIY[2zf
} {zc<:^r^
,HxsU,xiG
private void mergeSort(int[] data, int[] temp, int l, int r) { w-%H\+J
int i, j, k; :_q
int mid = (l + r) / 2; ~iZMV ?w
if (l == r) DVNGV
return; #Pulbk8
if ((mid - l) >= THRESHOLD) l*|^mx^Q
mergeSort(data, temp, l, mid); Dm j^aFB0|
else K`nI$l7hg
insertSort(data, l, mid - l + 1); j3bTa|UdT
if ((r - mid) > THRESHOLD) [9WtoA,kx
mergeSort(data, temp, mid + 1, r); _|S>,D'
else _G!lQ)1
insertSort(data, mid + 1, r - mid); [y73 xF
onM ~*E
for (i = l; i <= mid; i++) { Ne<"o]_M
temp = data; p0xd c3
} tj ,*-).4%
for (j = 1; j <= r - mid; j++) { Eg"DiI)7
temp[r - j + 1] = data[j + mid]; aPq9^S*
} ai(<"|(
int a = temp[l]; U/2g N H
int b = temp[r]; ]Ph~-O
for (i = l, j = r, k = l; k <= r; k++) { x7X"'1U
if (a < b) { 0(|BQ'4~H
data[k] = temp[i++]; .(,4a<I?%N
a = temp; R<gC,eV<=
} else { 0}YR=
data[k] = temp[j--]; j w)Lofn
b = temp[j]; ~a[]4\m;
} E/<[G?
} 8=!M0i
} ?=]`X=g6
k[l+~5ix
/** h94SLj]
* @param data ~ySmN}3~'
* @param l r3l}I6
* @param i _dj<xPO
*/ BYEqTwhT&
private void insertSort(int[] data, int start, int len) { w0Fi~:b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8u$Krq
} PXcpROg56
} oW-Tw@D
} N5rY*S
} cWl)ZE<hM
%Yg;s'F>#q
堆排序： j=)Cyg3_%
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package org.rut.util.algorithm.support; ,9q=2V[GP
h'<}N
import org.rut.util.algorithm.SortUtil; F_!6C-z
n37C"qJ/i
/** ]<q{0.
* @author treeroot $V~r*#$.
* @since 2006-2-2 GA{>=Q_~
* @version 1.0 Eo\#*Cv*
*/ =iRi9r'l
public class HeapSort implements SortUtil.Sort{ ^Ois]#py
EH"iK2n\9
/* (non-Javadoc) VuwBnQ.2k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j?1\E9&4-Q
*/ {nT !|S)$
public void sort(int[] data) { -[s*R%w
MaxHeap h=new MaxHeap(); 0k>NuIIP
h.init(data); J={$q1@lq
for(int i=0;i h.remove(); -9/YS
System.arraycopy(h.queue,1,data,0,data.length); 9U6y<X
} ;h_"5/#
j4le../N
private static class MaxHeap{ GEwgwenv
#6_?7 (X
void init(int[] data){ MC/$:PV
this.queue=new int[data.length+1]; sMli!u
for(int i=0;i queue[++size]=data; EuqmA7s8A
fixUp(size); ~)D2U:"^xm
} C81+nR
} ;)[RG\
VG+Yhm<SL
private int size=0; B8 -/C\
V;?_l?_
private int[] queue; KO<fN,DR
g?UG6mFbE
public int get() { 1j6ZSE/*|
return queue[1]; ^LTLyt)/
} rx'},[b]3
aZ2liR\QE
public void remove() { %,MCnu&Z
SortUtil.swap(queue,1,size--); 4pkc9\
fixDown(1); F&;g< SD
} dW<.
file://fixdown Q<zL;AJ
private void fixDown(int k) { $}l0Nh'Eu
int j; ! 2"zz/N{
while ((j = k << 1) <= size) { b,7:=-D
if (j < size %26amp;%26amp; queue[j] j++; N{iBVl
if (queue[k]>queue[j]) file://不用交换 7*OO k"9
break; 5JDqSz{
SortUtil.swap(queue,j,k); =ALy.^J=
k = j; JrseU6N
} |]DZc/
} M9]O!{sq
private void fixUp(int k) { gGN[AqR
while (k > 1) { 0F`@/C1y55
int j = k >> 1; E@"+w,x)
if (queue[j]>queue[k]) AZorzQ]s
break; u~Q0V J~
SortUtil.swap(queue,j,k); 0gHJ%m9s
k = j; w@.E}%bwq
} A2Rr*e
} b0x9}
8;p6~&).C~
} uwQ{y>SG
!li Q;R&
} :^3MN
5h+g^{BE
SortUtil： .Q?cNSWU
5)V J
package org.rut.util.algorithm; <X j:c2@
WDY,?
import org.rut.util.algorithm.support.BubbleSort; x+nrdW+
import org.rut.util.algorithm.support.HeapSort; Lh"Je-x<<
import org.rut.util.algorithm.support.ImprovedMergeSort; @= 6}w_
import org.rut.util.algorithm.support.ImprovedQuickSort; 3w ?)H
import org.rut.util.algorithm.support.InsertSort; c>!>D7:7
import org.rut.util.algorithm.support.MergeSort; >t'/(y
import org.rut.util.algorithm.support.QuickSort; ]0xbvJ8oK
import org.rut.util.algorithm.support.SelectionSort; [xk1}D
import org.rut.util.algorithm.support.ShellSort; Ws4aCH1
W )q^@6[d
/** rYeFYPS
* @author treeroot QgEG%YqB
* @since 2006-2-2 bL!NT}y`
* @version 1.0 f'aUo|^?
*/ "2 ma]Ps
public class SortUtil { !V Zl<|
public final static int INSERT = 1; :Py/d6KK
public final static int BUBBLE = 2; L/<^uO1
public final static int SELECTION = 3; {08UBnR
public final static int SHELL = 4; iF{eGi
public final static int QUICK = 5; )1lR;fD
public final static int IMPROVED_QUICK = 6; .gv J;A7
public final static int MERGE = 7; JV/K ouL
public final static int IMPROVED_MERGE = 8; Yj/S(4(h?
public final static int HEAP = 9; _I&0HRi
0D/j2cT("k
public static void sort(int[] data) { %@G<B
sort(data, IMPROVED_QUICK); *@dRL3c^=
} 4kT|/bp
private static String[] name={ +~ :1H.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b,~4O~z
}; ToCB*GlL
t\CVL?e`
private static Sort[] impl=new Sort[]{ u\ytiGO*
new InsertSort(), _|wgw^.LJ]
new BubbleSort(), 37a"<
new SelectionSort(), ^lB1- ;ng
new ShellSort(), (".`#909
new QuickSort(), /+"BU-aQk
new ImprovedQuickSort(), >wdR4!x!?
new MergeSort(), `{N0+n
new ImprovedMergeSort(), e~W35Y>A
new HeapSort() D+LeZBJ
}; yps7MM-r
[O&2!x
public static String toString(int algorithm){ pxM^|?Hxc
return name[algorithm-1]; +yVz) X
} (JocnM|U
TRcY!
public static void sort(int[] data, int algorithm) { :upi2S_e
impl[algorithm-1].sort(data); \Z ] <L
} )j4]Y dJ
%8yfFrk
public static interface Sort { ?Re@`f+*
public void sort(int[] data); vZTX3c:,1
} s)_7*DY
]V<[W,*(5
public static void swap(int[] data, int i, int j) { :w#Zs)N
int temp = data; ya5;C"
data = data[j]; pTST\0?
data[j] = temp; Um4 }`
} tUGnD<P
} s59v* /