[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; ;AgXl%Q
} \J^|H@;(@
int i1=l; \6v*c;ZF
int i2=mid+1; E- rXYNfy
for(int cur=l;cur<=r;cur++){ ~TALpd
if(i1==mid+1) "G!V?~;
data[cur]=temp[i2++]; :#p!&Fi
else if(i2>r) wz]OM
data[cur]=temp[i1++]; L}%4YB
else if(temp[i1] data[cur]=temp[i1++]; -%)8=
else rDWqJ<8
data[cur]=temp[i2++]; W= \gPCo
} y'pX/5R0
} (6\ H~
|/AY!Y3
} D`uOBEX
Mkadl<
改进后的归并排序: & pS5_x
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package org.rut.util.algorithm.support; Fu!sw]6xx
dCH(N_
import org.rut.util.algorithm.SortUtil; o*WI*Fb'
a"0'cgB}
/** v:$Y |mh
* @author treeroot jP|(y]!
* @since 2006-2-2 TJp0^&Q
* @version 1.0 :j0r~*z-
*/ *S4*FH;8
public class ImprovedMergeSort implements SortUtil.Sort { {pNf&'
9}6^5f?|
private static final int THRESHOLD = 10; 2*1s(Jro
~2*8pb 4
/* $:MO/Suz{
* (non-Javadoc) B%Spmx8
* j8gi/07l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G|Y9F|.!
*/ - '5OX/Szq
public void sort(int[] data) { }nJG<rY
int[] temp=new int[data.length]; +EBoFeeIG
mergeSort(data,temp,0,data.length-1); onj:+zl
} x?|
\ >(;t#>
private void mergeSort(int[] data, int[] temp, int l, int r) { JRj%d&^}
int i, j, k; 8o;9=.<<~u
int mid = (l + r) / 2; X`k[ J6
if (l == r) KI="O6 h
return; f i3<
if ((mid - l) >= THRESHOLD) K r&HT,>B
mergeSort(data, temp, l, mid); Zj8aD-1]U^
else ul$YV9[\
insertSort(data, l, mid - l + 1); ,fwN_+5
if ((r - mid) > THRESHOLD) ?pv}~>
mergeSort(data, temp, mid + 1, r); DHV#PLbN$
else V OViOD
insertSort(data, mid + 1, r - mid); U8(Rye$
[UHDN:y
for (i = l; i <= mid; i++) { cHMS[.=;
temp = data; Y+tXWN"8
} V/G'{ q
for (j = 1; j <= r - mid; j++) { nEM>*;iE
temp[r - j + 1] = data[j + mid]; a|im DY_-j
} DN@T4!
int a = temp[l]; $Y4;Xe=
int b = temp[r]; )5j%."
for (i = l, j = r, k = l; k <= r; k++) { mSzBNvci
if (a < b) { }X3SjNd q
data[k] = temp[i++]; vO2o/
a = temp; ?q<"!U|e
} else { A8R}W=
data[k] = temp[j--]; Osdw\NNH~M
b = temp[j]; ?b~Vuo
} j9za)G-J
} Xo*=iD$Jys
} 1v4(
NVMhbpX6
/** #U NTD4
* @param data 8vM}moper
* @param l {qCmZn5
* @param i WKQVT I&A.
*/ #<bt}Tht
private void insertSort(int[] data, int start, int len) { @hiwq7[j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +]Y&las
} )BY\c7SG
} {7)D/WY5
} OgfmyYMtc
} vb}; _/#?
sSi1;9^o
堆排序： MX?K3=j @>
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package org.rut.util.algorithm.support; xaWmwsym
P.RlozF5;
import org.rut.util.algorithm.SortUtil; {@9y%lmrh
0=;jGh}|i
/** ++:vO
* @author treeroot B8_w3;x
* @since 2006-2-2 ubIGs|p2c
* @version 1.0 Cd#>,,\z
*/ 1@kPl[`p'
public class HeapSort implements SortUtil.Sort{ jl=<Q.Mm7
5o5y3ibQ
/* (non-Javadoc) /GNRu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +'?p $@d
*/ :xfD>K
public void sort(int[] data) { tZ[Y~],F
MaxHeap h=new MaxHeap(); 9/MUzt
h.init(data); `av8|;
for(int i=0;i h.remove(); 8ltHR]v
System.arraycopy(h.queue,1,data,0,data.length); AyKaazm]9
} #{GUu',?&
n< [np;\
private static class MaxHeap{ l,*v/95h
=/"Of
void init(int[] data){ \CL |=8[2
this.queue=new int[data.length+1]; cX@~Hk4=\
for(int i=0;i queue[++size]=data; k=O2s'F`
fixUp(size); )kl| 5i
} >UpTMEQ
} hFP$MFab
vt[4"eU
private int size=0; 8h~v%aZ1
uRKCvsisX
private int[] queue; n\5` JNCb
sf]y\_zU
public int get() { #"6(Q2| l
return queue[1]; EW1L!3K
} &3>ki0L
l0g#&V--
public void remove() { rB|D^@mG
SortUtil.swap(queue,1,size--); 7Rj!vj/
fixDown(1); ,*r"cmz
} tq?lF$mM:
file://fixdown BSG_),AH
private void fixDown(int k) { L*9^-,
int j; n6[bF"v
while ((j = k << 1) <= size) { r^&{0c&o
if (j < size %26amp;%26amp; queue[j] j++; 46*o_A,"
if (queue[k]>queue[j]) file://不用交换 Ywt_h;:
break; 8UoMOeI3
SortUtil.swap(queue,j,k); cn=~}T@~Z
k = j; l2=.;7IV
} =A<kDxqH
} &TSt/b/+W
private void fixUp(int k) { -[v:1\Vv
while (k > 1) { O1coay
int j = k >> 1; Y*3qH]
if (queue[j]>queue[k]) bmc1S
break; } O9q$-8!
SortUtil.swap(queue,j,k); o)cd!,h
k = j; N- ?U2V
} 3`J?as@^8
} @h([c
}.4`zK&SB
} P@p(Y2&~g
1#Dpj.cO#
} #18H Z4N
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SortUtil： `,aPK/
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package org.rut.util.algorithm; c}Y(Myd
UMo=bs
import org.rut.util.algorithm.support.BubbleSort; &6PZX0M
import org.rut.util.algorithm.support.HeapSort; N6$pOQ
import org.rut.util.algorithm.support.ImprovedMergeSort; Uq~{=hMX
import org.rut.util.algorithm.support.ImprovedQuickSort; |h*H;@$
import org.rut.util.algorithm.support.InsertSort; (}"r 5
import org.rut.util.algorithm.support.MergeSort; vAq`*]W+
import org.rut.util.algorithm.support.QuickSort; Us M|OH5k
import org.rut.util.algorithm.support.SelectionSort; D<#+ R"
import org.rut.util.algorithm.support.ShellSort; `.Y["f 1B
e\k=T}
/** 7<AHQ<#@
* @author treeroot [L|H1ll
* @since 2006-2-2 AGn:I??
* @version 1.0 LCRreIIgZ
*/ 9]VUQl9gh
public class SortUtil { >z h
public final static int INSERT = 1; ]o_Z3xXUa
public final static int BUBBLE = 2; ;)5d wq
public final static int SELECTION = 3; hv}rA,Yd
public final static int SHELL = 4; Q4TI '/
public final static int QUICK = 5; EkEM|<GNd
public final static int IMPROVED_QUICK = 6; AASw^A3p
public final static int MERGE = 7; z*YkD"]B
public final static int IMPROVED_MERGE = 8; A<r@,*(g
public final static int HEAP = 9; AR]y p{NS
II)\rVP5
public static void sort(int[] data) { PLKp<kg
sort(data, IMPROVED_QUICK); IBf&'/ 8\
} WHqp7NPl
private static String[] name={ s,"<+80%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bra>C
}; <G{m=
yd`xmc)
private static Sort[] impl=new Sort[]{ v6HBO#F'V{
new InsertSort(), fr;>`u[;
new BubbleSort(), /lx\9S|
new SelectionSort(), hkJ4,.
new ShellSort(), 3@J0-w
new QuickSort(), 1@P/h#_Vr
new ImprovedQuickSort(), k)b}"' I
new MergeSort(), c#$B;?
new ImprovedMergeSort(), 05LVfgJ'q
new HeapSort() Cv>|>Ob#
}; %8>s:YG
4gb2$"!
public static String toString(int algorithm){ &kHp}\
return name[algorithm-1]; Ji :2P*
} BP,"vq$'+
[95(%&k.Q
public static void sort(int[] data, int algorithm) { PSI5$Vna4p
impl[algorithm-1].sort(data); MmI4J$F
} rBkLwJ]
\s<{V7tq
public static interface Sort { 2w'Q9&1~
public void sort(int[] data); _:Tjq)
} M3odyO(
BZ">N
public static void swap(int[] data, int i, int j) { Ha@'%<gFe
int temp = data; sk\U[#ohH
data = data[j]; 1%]|O
data[j] = temp; 1LZ?!Lw
} Lz2wOB1Zc+
} *j?tcxq