[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; QigoRB!z#9
} w{:Oa7_A
int i1=l; .qb_/#Bas
int i2=mid+1; |`)V^e_
for(int cur=l;cur<=r;cur++){ )L(d$N=Bd
if(i1==mid+1) 'sjJSc
data[cur]=temp[i2++]; \ ]kb&Qw
else if(i2>r) [FAOp@7W
data[cur]=temp[i1++]; }]39 iK`w
else if(temp[i1] data[cur]=temp[i1++]; Q#J>vwi=
else iZkW+5(
data[cur]=temp[i2++]; <mo^Y k3
} ) v[Knp'
} u':0"5}
11@2;vw
} bWC~Hv
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改进后的归并排序: Gwrx)Mq
k^dCX+
package org.rut.util.algorithm.support; 0oi5]f6g?8
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import org.rut.util.algorithm.SortUtil; ,# jOf{L*
Ng_rb KXC#
/** 4|@FO}rK[l
* @author treeroot ko+M,kjwR
* @since 2006-2-2 8O.:3%D~ t
* @version 1.0 Lm*LJ_+ B
*/ vVAZSR#
public class ImprovedMergeSort implements SortUtil.Sort { Pdo5sve
!irX[,e
private static final int THRESHOLD = 10; /nMqEHCyg
".Deu|>
/* &PQ{e8w
* (non-Javadoc) Vg [5bJ5
* 0JZq:hUd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `.sIZku
*/ ">D(+ xr!)
public void sort(int[] data) { d$?n6|4
int[] temp=new int[data.length]; MlC-Aad(
mergeSort(data,temp,0,data.length-1); )oxP.K8q)U
} C#?d=x
73sAZa|
private void mergeSort(int[] data, int[] temp, int l, int r) { /wxxcq
int i, j, k; >A'!T'"~
int mid = (l + r) / 2; CQuvbAo
if (l == r) 4;c_%=cU
return; TaHi+
if ((mid - l) >= THRESHOLD) 8DS5<
mergeSort(data, temp, l, mid); qf&a<[p~
else @%@^5
insertSort(data, l, mid - l + 1); {8bY7NH|
if ((r - mid) > THRESHOLD) K[|P6J
mergeSort(data, temp, mid + 1, r); ,cO)Sxj
else sImxa`kb
insertSort(data, mid + 1, r - mid); K{w=qJBM
j&G~;(DY
for (i = l; i <= mid; i++) { VX>t!JP p
temp = data; AO7qs:+
} T#^6u)
for (j = 1; j <= r - mid; j++) { $XU$?_O
temp[r - j + 1] = data[j + mid]; Z-p^3t'{
} \utH*;J|x
int a = temp[l]; BiLreZ~"
int b = temp[r]; {e
for (i = l, j = r, k = l; k <= r; k++) { .W+4sax:
if (a < b) { eWk2YP!
data[k] = temp[i++]; .Zt/e>K&
a = temp; 2u;fT{(
} else { QEHZ=Yg%3
data[k] = temp[j--]; r|F,\fF
b = temp[j]; 8}0y)aJ
} awW\$Q
} K$vRk5U
} Pk]9.e1_
!<PTsk F
/** ;Wh[q*A
* @param data fU~y481A
* @param l 9*Twx&
* @param i 0m!ZJHe
*/ jW$f(qAbm
private void insertSort(int[] data, int start, int len) { .MPOUo/e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); td$6:)
} l YA+k5
} vlyNQ7"%
} & ~G
} VzM@DM]=~
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堆排序： E :gArQ
GeTCN
package org.rut.util.algorithm.support; "m)O13x
e/D\7Pf
import org.rut.util.algorithm.SortUtil; ,^66`C[G
_r)nbQm&
/** \`9|~!,Ix7
* @author treeroot 2-2LmxLG
* @since 2006-2-2 vKLG9ovlY
* @version 1.0 \/%Q PE8
*/ kZEy
public class HeapSort implements SortUtil.Sort{ 8>+eGz|
BeCr){,3
/* (non-Javadoc) m,fr?d/;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V0B4<TTAo~
*/ b|'LtL$Y
public void sort(int[] data) { w8Vzx8
MaxHeap h=new MaxHeap(); )p](*Z^
h.init(data); oYm"NDS_.
for(int i=0;i h.remove(); {lw ec"{
System.arraycopy(h.queue,1,data,0,data.length); B|w}z1.
} *g.,[a0
L)"w-,zy
private static class MaxHeap{ %['F[Mo
KDzIarC
void init(int[] data){ qo![#s
this.queue=new int[data.length+1]; j}Mpc;XOc
for(int i=0;i queue[++size]=data; !LESRh?
fixUp(size); SK2pOZN
} 05DtU!3O
} , >6X_XJQ
6n4S$a
private int size=0; /;[')RO`
FpYoCyD}
private int[] queue; u(qpdG||7
ba.OjK@
public int get() { ";%1sK
return queue[1]; oOvbel`;
} P|4a}SWU
ttxOP
public void remove() { -UE-v
SortUtil.swap(queue,1,size--); ? -tw*2+
fixDown(1); .- o,_eg1f
} $xwF;:)
file://fixdown gNBI?xs`p
private void fixDown(int k) { oWT0WS
int j; dDTt_B
while ((j = k << 1) <= size) { i;7jJ(#V
if (j < size %26amp;%26amp; queue[j] j++; (yVI<Os{a
if (queue[k]>queue[j]) file://不用交换 uDUSR+E>
break; T!AQJ:;1
SortUtil.swap(queue,j,k); q2Dg~et
k = j; MsiSC
} gqamGLK
} ?J AzN
private void fixUp(int k) { owB)+
while (k > 1) { q9>w3 <
int j = k >> 1; (TsgVq]L
if (queue[j]>queue[k]) \qPrY.-
break; xFh}%mwpt[
SortUtil.swap(queue,j,k); xC]/i(+bA
k = j; 6C=.8eP
} Yy5F'RY
} -u(#V#}OV?
9lwg`UWl,
} h&P[9:LH
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} tVwN92*J
v}U;@3W8U
SortUtil： 1{qg@xlj
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package org.rut.util.algorithm; 92R{V%)G
~V5jjx*
import org.rut.util.algorithm.support.BubbleSort; G}x^PJJt
import org.rut.util.algorithm.support.HeapSort; CEiGjo^
import org.rut.util.algorithm.support.ImprovedMergeSort; }OZfsYPz}T
import org.rut.util.algorithm.support.ImprovedQuickSort; CS
import org.rut.util.algorithm.support.InsertSort; /$KW$NH4z
import org.rut.util.algorithm.support.MergeSort; 60m1 >"
import org.rut.util.algorithm.support.QuickSort; u&:jQ:[
import org.rut.util.algorithm.support.SelectionSort; bk2vce&
import org.rut.util.algorithm.support.ShellSort; ;%&@^;@k%
Y\\&~g42R2
/** pE#0949
* @author treeroot BC3I{Y|
* @since 2006-2-2 ]`x~v4JU
* @version 1.0 '?nhpT^
*/ 3z#16*
public class SortUtil { V_:/#G]jeG
public final static int INSERT = 1; *e=e7KC6kI
public final static int BUBBLE = 2; {chl+au*l
public final static int SELECTION = 3; 4^ A\w
public final static int SHELL = 4; MC3{LVNK
public final static int QUICK = 5; y_w4ei
public final static int IMPROVED_QUICK = 6; tO#y4<
public final static int MERGE = 7; Sn0 Gw
public final static int IMPROVED_MERGE = 8; 8Vp"}(Q
public final static int HEAP = 9; }6\p7n
(_D#gr{S=
public static void sort(int[] data) { eG<32$I
sort(data, IMPROVED_QUICK); z`W$/tw"
} u+N[Cgh
private static String[] name={ N9hBGa$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /Bc ;)~
}; #qzozQ4
)%0#XC^/X5
private static Sort[] impl=new Sort[]{ G'%mmA\
new InsertSort(), Q%6*S!~
new BubbleSort(), r'j*f"uAm
new SelectionSort(), 9d v+u6)
new ShellSort(), FXIQS'
new QuickSort(), z}Q54,9m
new ImprovedQuickSort(), \ /o`CV{O
new MergeSort(), v vFX\j3
new ImprovedMergeSort(), tH$Z_(5
new HeapSort() &N,c:dNe
}; ]krOPM/
>n#Pq{7aF
public static String toString(int algorithm){ *9G;n!t
return name[algorithm-1]; Y?Xs Z
} 3ILEc:<0J
l =#uy
public static void sort(int[] data, int algorithm) { P9gIKOOx#4
impl[algorithm-1].sort(data); e4t'3So
} 7JjTm^bu
V5m4dQ>t
public static interface Sort { 4Xlq Ym
public void sort(int[] data); ~ujY+{
} qWdL|8
$Z #
public static void swap(int[] data, int i, int j) { @hp@*$#& 9
int temp = data; ZPHB$]ri
data = data[j]; gWRSS=8%
data[j] = temp; HqOzArp3
} Que-
} 7aS`SF