[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; @]X5g8h
} #qg(DgH 7
int i1=l; b]@@x;v$@
int i2=mid+1; ]6z ; M;F`
for(int cur=l;cur<=r;cur++){ ~oE@y6Q
if(i1==mid+1) ?$0t @E
data[cur]=temp[i2++]; 8 ;o*c6+
else if(i2>r) l[M?"<Ot;
data[cur]=temp[i1++]; Geyj`t
else if(temp[i1] data[cur]=temp[i1++]; sL\W6ej
else fQ_(2+FM
data[cur]=temp[i2++]; dIOiP\^
} n0tVAH'>
} d2(3 ,
OzS/J;[PO[
} \I #}R4z
W;!)Sj4<T!
改进后的归并排序: T9&bY>f?
j=n<s</V
package org.rut.util.algorithm.support; 9y(491"o
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import org.rut.util.algorithm.SortUtil; c`xgz#]v
R/?ZbMn]!
/** d0D*S?#8,C
* @author treeroot 22r$Ri_>
* @since 2006-2-2 tLo_lLn*~%
* @version 1.0 q-TDg0
*/ ,BE4z2a
public class ImprovedMergeSort implements SortUtil.Sort { %rq/&#jC
%3mh'Z -[f
private static final int THRESHOLD = 10; d{*e0
)T!3du:M
/* l&oc/$&|[
* (non-Javadoc) POt8G
* 10W6wIqK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C7xmk;c w
*/ ! ,&{1p
public void sort(int[] data) { B8.uzX'p
int[] temp=new int[data.length]; 6uKS!\EY|
mergeSort(data,temp,0,data.length-1); k07pI<a?
} <_~e/+_.
~9DD=5\
private void mergeSort(int[] data, int[] temp, int l, int r) { JpC_au7CX
int i, j, k; -mY,nMDb
int mid = (l + r) / 2; EiCEB;*z|d
if (l == r) L{Kl!
return; x f<wM]&
if ((mid - l) >= THRESHOLD) sX,S]:X
mergeSort(data, temp, l, mid); %2^wyVkq:
else ?OF9{$m3?
insertSort(data, l, mid - l + 1); vx}W.6C}
if ((r - mid) > THRESHOLD) *5d6Q
mergeSort(data, temp, mid + 1, r); W?X3 :1c9:
else j-TRa,4bN
insertSort(data, mid + 1, r - mid); #gSLFM{p
<Xl/U^B
for (i = l; i <= mid; i++) { {{@*
temp = data; G*%:"qleT$
} ~NG+DyGa=
for (j = 1; j <= r - mid; j++) { `PS>"-AY2
temp[r - j + 1] = data[j + mid]; w'7=CzfYn
} 5Sx.'o$
int a = temp[l]; ^vha4<'-qG
int b = temp[r]; }0idFotck
for (i = l, j = r, k = l; k <= r; k++) { U*:E|'>
if (a < b) { =SVb k
data[k] = temp[i++]; Js/QL=,
a = temp; -T{G8@V0I
} else { "WZ|
data[k] = temp[j--]; Hp5.jor(k
b = temp[j]; 3oBR
} @^Yr=d ba
} a9y+FCA
} t$g@+1p4
3 @%XR8ss
/** <d~si^*\ch
* @param data ?tx."MZ
* @param l j9~lf
* @param i ';;X{a
*/ cUC!'+L
private void insertSort(int[] data, int start, int len) { aM YtWj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /_</m?&.U&
} I'0{Q`}
} RAj>{/E#W
} h]pz12Yf
} Cf>(,rt};
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堆排序： SVBo0wvz-
,-[z?dvO
package org.rut.util.algorithm.support; hGJANA
KZ@'NnQ
import org.rut.util.algorithm.SortUtil; a!B"WNb+
CN:z *g
/** ;@xlrj+
* @author treeroot '8=/v*j>?
* @since 2006-2-2 :*Y2na)qQ
* @version 1.0 .I.B,wH8
*/ sW@_' Lw
public class HeapSort implements SortUtil.Sort{ `G`yA%
bX>R9i$
/* (non-Javadoc) ZdgzPs"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xSq{pxX
*/ Z):Nd9
public void sort(int[] data) { '^M.;Giz
MaxHeap h=new MaxHeap(); g cb6*@u!
h.init(data); qKTzigjj
for(int i=0;i h.remove(); F}?4h Dt
System.arraycopy(h.queue,1,data,0,data.length); n j2=}6
} 8p]9A,Uq&
9;NXzO27
private static class MaxHeap{ 0ZJj5<U
($-m}UF\/
void init(int[] data){ zPN:)
this.queue=new int[data.length+1]; Raf(m,o(
for(int i=0;i queue[++size]=data; 9e Fj+
fixUp(size); &%m%b5
} quRTA"!E
} K/K|[=bl
@Gt.J*!s/
private int size=0; :0Z\-7iK
ih-J{1
private int[] queue; jl5&T{z
)Z)Gb~G
public int get() { Ub/ZzAwq
return queue[1]; |-L7qZu%
} @qEUp7W.?
in6*3C4
public void remove() { (eSsx/
SortUtil.swap(queue,1,size--); ")<5VtV
fixDown(1); /36gf
} N(V_P[]"*,
file://fixdown inh J|pe"
private void fixDown(int k) { GSW%~9WBa
int j; pQ>|dH+.
while ((j = k << 1) <= size) { b0Dco0U(
if (j < size %26amp;%26amp; queue[j] j++; RFoCM^
if (queue[k]>queue[j]) file://不用交换 ?tA%A
break; EjMVlZC>
SortUtil.swap(queue,j,k); m`}mbm^
k = j; 5Dzf[V^]`
} $ ^@fV=e
} S=\cF,Zs
private void fixUp(int k) { Ft38)T"2R\
while (k > 1) { :w+vi7l$
int j = k >> 1; fUr%@&~l^
if (queue[j]>queue[k]) <@P. 'rE
break; %%NT m
SortUtil.swap(queue,j,k); xkv%4H>
k = j; XJ5@/BW
} '6; {DX
} [S1 b\f#
\*[DR R0
} huW,kk<]y
hQ'W7EF
} YmOj.Q&
ea]qX6)UZ
SortUtil： %z=:P{0UQ
ka6E s~
package org.rut.util.algorithm; Wf^sl
?U+hse3e~
import org.rut.util.algorithm.support.BubbleSort; 2vh }:A_
import org.rut.util.algorithm.support.HeapSort; r)#W`A1{A
import org.rut.util.algorithm.support.ImprovedMergeSort; hz*T"HJ]t
import org.rut.util.algorithm.support.ImprovedQuickSort; lv9Tq5C
import org.rut.util.algorithm.support.InsertSort; JOJuGB-d
import org.rut.util.algorithm.support.MergeSort; fp*6Dv_
import org.rut.util.algorithm.support.QuickSort; *ow`}Q
import org.rut.util.algorithm.support.SelectionSort; n}t9Nf_
import org.rut.util.algorithm.support.ShellSort; F]D{[dBf
*@p"
/** 8d_J9Ho
* @author treeroot RMiDV^.u`
* @since 2006-2-2 UI"UBZZ$
* @version 1.0 _QEw=*.<
*/ "{\xBX~oM
public class SortUtil { FSm.o?>
public final static int INSERT = 1; 6aOyI;Ux
public final static int BUBBLE = 2; bX$1PYX
public final static int SELECTION = 3; j1A%LS;c_
public final static int SHELL = 4; dNhbvzl(
public final static int QUICK = 5; CAC%lp
public final static int IMPROVED_QUICK = 6; 1DcX$b
public final static int MERGE = 7; ;S \s&.u
public final static int IMPROVED_MERGE = 8; W@ &a
public final static int HEAP = 9; :9av]Yv&
]A5Y/dd
public static void sort(int[] data) { >KL=(3:":p
sort(data, IMPROVED_QUICK); Hqs!L`oW)
} 9cHo~F|ur
private static String[] name={ Rk7F;2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K1^7v}P
}; w^Yo)"6
}X?#"JFX?
private static Sort[] impl=new Sort[]{ lg8@^Pm$r;
new InsertSort(), /]^Y\U^
new BubbleSort(), _cE_\Ay
new SelectionSort(), KE ?NQMU
new ShellSort(), G%FZTA6a
new QuickSort(), jU~ x^Y
new ImprovedQuickSort(), `g3AM%3
new MergeSort(), #-@Uq6Y
new ImprovedMergeSort(), '(rD8 pc
new HeapSort() r{^43g?
}; CgmAxcK
a6j& po
public static String toString(int algorithm){ b>VV/j4!/
return name[algorithm-1]; ]J'TebP=L5
} =Y81h-
4>i\r
public static void sort(int[] data, int algorithm) { iiQ q112`
impl[algorithm-1].sort(data); ?&;_>0P
} =PciLh
C\;l)h_{
public static interface Sort { qFwt^w
public void sort(int[] data); icIn>i<m
} Zp3-Yo w2
>h)kbsSU0z
public static void swap(int[] data, int i, int j) { bXvO+I<
int temp = data; `-.2Z 0
data = data[j]; @fYVlHT%E
data[j] = temp; r dSL
} 8-NycG&)
} cz1+ XpU