[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; wuPx6hCl
} \5Hfe;ny-~
int i1=l; 'Ic$p>
int i2=mid+1; @hk~8y]rz
for(int cur=l;cur<=r;cur++){ 6b@:La
if(i1==mid+1) !y6 D+<k*]
data[cur]=temp[i2++]; Rt+s\MC^r
else if(i2>r) <=WQs2
data[cur]=temp[i1++]; )AnX[:y
else if(temp[i1] data[cur]=temp[i1++]; F*QGzbv)
else zH.7!jeE
data[cur]=temp[i2++]; 0 j6/H?OT
} ^X^4R1V)
} X[R/j*K
nP] ~8ViS
} vFQ'sd]C
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改进后的归并排序: E;k'bz
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package org.rut.util.algorithm.support; .QW89e,O3
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import org.rut.util.algorithm.SortUtil; fF;-d2mF
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/** ;asB@Q
* @author treeroot >=wlS\:"
* @since 2006-2-2 NT:p6(s^
* @version 1.0 /aP`|&G,)
*/ 66v6do7
public class ImprovedMergeSort implements SortUtil.Sort { |[8&5[);
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private static final int THRESHOLD = 10; h60*=+vdJ
q* +}wP
/* p"w"/[8
* (non-Javadoc) YeT[KjX
* phd,Jg[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5EM(3eY^q
*/ s~,Ypo?
public void sort(int[] data) { K%.\@l2Cp
int[] temp=new int[data.length]; ]JbGP{UiN
mergeSort(data,temp,0,data.length-1); 9%pq+?u9
} c5pF?kFaD
}Dm-Ibdg(
private void mergeSort(int[] data, int[] temp, int l, int r) { aH*)W'N?
int i, j, k; $0 eyp]XC\
int mid = (l + r) / 2; 3V2"1Ic
if (l == r) ^As^hY^p
return; >HXT:0
if ((mid - l) >= THRESHOLD) V|)3l7IC<
mergeSort(data, temp, l, mid); k68\ _NUL
else |X0h-kX4
insertSort(data, l, mid - l + 1); -m3O\X
if ((r - mid) > THRESHOLD) xh,};TS(K
mergeSort(data, temp, mid + 1, r); hvkLcpE
else `;L>[\Xi
insertSort(data, mid + 1, r - mid); 7']n_-fu
> X<pzD3u
for (i = l; i <= mid; i++) { rLtB^?A z
temp = data; ?Mtd3F^o?
} OW;]=k/(
for (j = 1; j <= r - mid; j++) { oSq4g{xvMH
temp[r - j + 1] = data[j + mid]; . _Bejh
} [LbUlNq^B@
int a = temp[l]; !`JaYUL[e
int b = temp[r]; FWNWOU
for (i = l, j = r, k = l; k <= r; k++) { u1R_u9
if (a < b) { ],V_"\ATD
data[k] = temp[i++]; >{C=\F#*L
a = temp; rOHU)2
} else { J'jwRn
data[k] = temp[j--]; BIqZg$
b = temp[j]; @9Rgg9r
} R7pdwKD
} `fYICp
} -{n2^vvF
ge %ytrst
/** /}t>o* x
* @param data p~Di\AQ/
* @param l j51Wod<[
* @param i `lygJI?H+{
*/ *:L-/Q)i
private void insertSort(int[] data, int start, int len) { Q]?r&%Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;6P#V`u
} =:Ahg 9
} N8S!&*m
} 9.)*z-f$
} Z]OXitt7
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堆排序： QhR.8iS
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package org.rut.util.algorithm.support; ;;;aM:6\
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import org.rut.util.algorithm.SortUtil; lV924mh
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/** )lh48Ag0t;
* @author treeroot iYJ:P
* @since 2006-2-2 <?yf<G'$
* @version 1.0 dp;;20z
*/ IsP-[0it
public class HeapSort implements SortUtil.Sort{ J8IdQ:4^l
P5-1z&9O
/* (non-Javadoc) |[qq $
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z1Y/2MVSb
*/ !'scOWWn
public void sort(int[] data) { ?'SHt9b3|
MaxHeap h=new MaxHeap(); NX.%Rj*
h.init(data); [Ume^
for(int i=0;i h.remove(); tjLp;%6e
System.arraycopy(h.queue,1,data,0,data.length); \A "_|Yg
} " ,k(*
G4O $gg
private static class MaxHeap{ B6qM0QW
dAg<BK/
void init(int[] data){ o\<m99Ub
this.queue=new int[data.length+1]; *WTmS2?'h
for(int i=0;i queue[++size]=data; *XN|ZGl/
fixUp(size); [=/Yo1:v
} LelCjC{`1
} b~$B0o)
$r>$ u
private int size=0; 0 ]K\G55
"$P|!k45(
private int[] queue; gbf2ty
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public int get() { Z!#n55|
return queue[1]; zt,Tda4Y
} %*:X FB
tFj[>_d7
public void remove() { (p6$Vgdt
SortUtil.swap(queue,1,size--); [k<"@[8)
fixDown(1); MC\rx=cR\
} m 0jm$>:Z
file://fixdown Jr2x`^aNO
private void fixDown(int k) { +`jI z'+
int j; |aWeo.;c
while ((j = k << 1) <= size) { *aem5E`c
if (j < size %26amp;%26amp; queue[j] j++; skSs|slp
if (queue[k]>queue[j]) file://不用交换 Dqxtc|vo
break; }253Q!f
SortUtil.swap(queue,j,k); hKx*V"7/#\
k = j; SK][UxoHm
} Wb)>APL
} yLFZo"r
private void fixUp(int k) { ^jph"a C
while (k > 1) { 0;J#".(KQ
int j = k >> 1; 8VWkUsOoI
if (queue[j]>queue[k]) "K Or)QD/
break; A5WchS'
SortUtil.swap(queue,j,k); 3P}^Wu
k = j; 5Yxs_t4
} &PE/\_xD_
} NI<;Lm
JyiP3whW
} W'98ues%
|$>ZGs#
} GF^)](xY+
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SortUtil： =P}BAJ
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package org.rut.util.algorithm; ?@@BIg-
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import org.rut.util.algorithm.support.BubbleSort; Jm#mC
import org.rut.util.algorithm.support.HeapSort; }Cs.Hm0P
import org.rut.util.algorithm.support.ImprovedMergeSort; r}>q*yx:
import org.rut.util.algorithm.support.ImprovedQuickSort; b '9L}q2m
import org.rut.util.algorithm.support.InsertSort; 9e aqq
import org.rut.util.algorithm.support.MergeSort; n "J+?~9
import org.rut.util.algorithm.support.QuickSort; !EwL"4pPw
import org.rut.util.algorithm.support.SelectionSort; :Qc[>:N
import org.rut.util.algorithm.support.ShellSort; @3aI7U/I
NP+*L|-;
/** C<G`wXlP|
* @author treeroot O,D/&0
* @since 2006-2-2 \c1NIuJR
* @version 1.0 178u4$# b
*/ :6T8\W
public class SortUtil { AcoU.tpP
public final static int INSERT = 1; iHYvH
public final static int BUBBLE = 2; RX"~m!26
public final static int SELECTION = 3; <w1#3Mu'
public final static int SHELL = 4; SWq5=h
public final static int QUICK = 5; s.uw,x
public final static int IMPROVED_QUICK = 6; 0b3z(x!O
public final static int MERGE = 7; 7,v}Ap]Pa
public final static int IMPROVED_MERGE = 8; e5z U`R
public final static int HEAP = 9; B* hW
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public static void sort(int[] data) { P}2waJe
sort(data, IMPROVED_QUICK); PV(TDb:0
} q@+#CUa&n
private static String[] name={ $~G=Hcl9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _yH=w'8.
}; +k?0C?/T;
_+0QQ{'N
private static Sort[] impl=new Sort[]{ kv8 /UW
new InsertSort(), MJ%gF=$X
new BubbleSort(), {>]7xTpwZ
new SelectionSort(), "d3qUk
new ShellSort(), /4xp?Lo:
new QuickSort(), BKJwM'~
new ImprovedQuickSort(), %~{G*%:
new MergeSort(), %=PGvu
new ImprovedMergeSort(), f8AgTw,K8
new HeapSort() 4k6,pt"
}; =X24C'!Mpe
cs\/6gSCo
public static String toString(int algorithm){ FV];od&c
return name[algorithm-1]; FCp\w1+
} wJ}9(>id*
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public static void sort(int[] data, int algorithm) { q33Z.3R
impl[algorithm-1].sort(data); $Y3mO~
} #ouE,<
Pkq?tm$#
public static interface Sort { ,x]xtg?
public void sort(int[] data); wMx#dP4W8
} oBpoZ @[Z
I `I+7~t
public static void swap(int[] data, int i, int j) { $TK<~3`
int temp = data; +#wh`9[wBt
data = data[j]; $p?TE8G
data[j] = temp; C%LXGMt
} p2)563#RS
} pIbm)-