[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; w/Ia`Tx$
} <sd Qvlx$-
int i1=l; XMuZ'I
int i2=mid+1; im*XS@Uj
for(int cur=l;cur<=r;cur++){ 9/^4W.
if(i1==mid+1) Ip?Ueaei
data[cur]=temp[i2++]; <o p !dS
else if(i2>r) o1YhYA
data[cur]=temp[i1++]; E-n!3RQ(w
else if(temp[i1] data[cur]=temp[i1++]; l1!i3m'x
else 7dxY07yu
data[cur]=temp[i2++]; Br-bUoua
} J]$%1Y
} hLO nX<%a
]_5C5m
} jj.)$|&#`
m|e!1_:H
改进后的归并排序: D*_ F@}=
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package org.rut.util.algorithm.support; :90DS_4
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import org.rut.util.algorithm.SortUtil; *:)#'cenI
gl00$}C
/** `5h$@
* @author treeroot `s@1'IG;R_
* @since 2006-2-2 qCIZW
* @version 1.0 OB5(4TY
*/ LvE|K&R|
public class ImprovedMergeSort implements SortUtil.Sort { )]rGGNF*
R%}OZJ_
private static final int THRESHOLD = 10; -08Ys c
h&[!CtPm
/* ]ujH7T
* (non-Javadoc) 4AUY8Pxp
* 0p&:9|'z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ])0&el3-
*/ @4hxGk=
public void sort(int[] data) { *$uKg zv3
int[] temp=new int[data.length]; ^8E/I]-
mergeSort(data,temp,0,data.length-1); P0UMMn\-#
} awo=%vJ&
vPpbm
private void mergeSort(int[] data, int[] temp, int l, int r) { IRXpk6|
int i, j, k; (z+[4l7
int mid = (l + r) / 2; , lT8gQ|u
if (l == r) :9]23'Md
return; NIQa{R/H
if ((mid - l) >= THRESHOLD) "'s`?
mergeSort(data, temp, l, mid); Mm|HA@W^
else rcNM,!dZ
insertSort(data, l, mid - l + 1); #S_LKc
if ((r - mid) > THRESHOLD) aRj3TtFh
mergeSort(data, temp, mid + 1, r); r=8]Ub[
else +qjW;]yxP
insertSort(data, mid + 1, r - mid); nM\Wa
Q8T4_p[-o
for (i = l; i <= mid; i++) { \-`L}$
temp = data; S ^2'O7uj
} ]';!r20
for (j = 1; j <= r - mid; j++) { o y}(
temp[r - j + 1] = data[j + mid]; 7{/qQGL
} Z A7u66
int a = temp[l]; 2.?:[1g!
int b = temp[r]; UV@<55)K
for (i = l, j = r, k = l; k <= r; k++) { ?RrJYj1
if (a < b) { ?9 2+(s
data[k] = temp[i++]; Y~gpiL3u
a = temp; K\=bpc"Fy
} else { bbS'ZkB\
data[k] = temp[j--]; eBtkTWx5[/
b = temp[j]; u[fQvdl
} W=PDOzB>K
} 2 R1S>X
} j&[63XSe
4hZ-^AL"(
/** :IbrV@gN{@
* @param data tE<L4;t
* @param l _/P"ulNb
* @param i ^J\)cw
*/ xLq+njH E
private void insertSort(int[] data, int start, int len) { {Yv |C)O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <P$b$fh/
} "yL&?B"9@
} (|h<{ -L
} CA[k$Sw*
} q{n~s=
hTH"jAC+
堆排序： ?AYI
k:`^KtBMl
package org.rut.util.algorithm.support; /8J2,8vZ
SJIJV6}H
import org.rut.util.algorithm.SortUtil; 9S.R%2xw`
kZSe#'R's
/** .oAg (@^6
* @author treeroot &=@R,
* @since 2006-2-2 (#\3XBG
* @version 1.0 5j,)}AYO
*/ .J&~u0g
public class HeapSort implements SortUtil.Sort{ efZdtrKgy
JI@~FD&
/* (non-Javadoc) tj{rSg7{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sfa T`q
*/ ~O|j*T
public void sort(int[] data) { tJ2l_M^
MaxHeap h=new MaxHeap(); qt/"$6]%
h.init(data); <$,iYx
for(int i=0;i h.remove(); 8t9sdqM/C
System.arraycopy(h.queue,1,data,0,data.length); \`|,wLgH
} r(%#@?&
e>sr)M
private static class MaxHeap{ 9Ni$nZN
Ho\K %#u
void init(int[] data){ e[>(L%QV+
this.queue=new int[data.length+1]; 3)__b:7J
for(int i=0;i queue[++size]=data; 3l5q?"$
fixUp(size); 2Xe2%{
} d=N5cCqq
} _S@s
dpGaI
private int size=0; Hagj^8
?8YHz
private int[] queue; c\]h YKA
89+m?H]K
public int get() { 9FH=Jp
return queue[1]; 93[`1_q7\
} ]+d.X]
/DZKz"N
public void remove() { kf&id/|
SortUtil.swap(queue,1,size--); ctH`71Y
fixDown(1); pZ OVD%
} {lx^57v
file://fixdown 4'G<qJoc
private void fixDown(int k) { $].< /
int j; Gd:fWz(
while ((j = k << 1) <= size) { ;y4 "wBX
if (j < size %26amp;%26amp; queue[j] j++; oA_AnD?G+
if (queue[k]>queue[j]) file://不用交换 |F9/7 z\5+
break; k<8:
SortUtil.swap(queue,j,k); w}oH]jVKL6
k = j; l&;#`\s!V
} z}u
} c>=[|F{{e
private void fixUp(int k) { >*vI:MG8
while (k > 1) { j31 Sc3vG
int j = k >> 1; yd`.Rb&V
if (queue[j]>queue[k]) k NK)mE
break; -`f JhQ|
SortUtil.swap(queue,j,k); l.>QO ;
k = j; j~Rh_\>Q
} )]X_')K
} }w"laZ*
is#?O5:2
} |]\qI
0#XZ_(@%
} n8R{LjJ2@
?}B_'NZ%
SortUtil： :+!hR4Z~\;
CO5?UgA
package org.rut.util.algorithm; \T<?=A
0Oe@0L%^3"
import org.rut.util.algorithm.support.BubbleSort; !oM1
import org.rut.util.algorithm.support.HeapSort; u_zp?Nc
import org.rut.util.algorithm.support.ImprovedMergeSort; IjJ3CJ<
import org.rut.util.algorithm.support.ImprovedQuickSort; A3M)yWq
import org.rut.util.algorithm.support.InsertSort; 0m51nw~B
import org.rut.util.algorithm.support.MergeSort; YujhpJ<
import org.rut.util.algorithm.support.QuickSort; UO>p-M
import org.rut.util.algorithm.support.SelectionSort; AGPZd9
import org.rut.util.algorithm.support.ShellSort; k\zNh<^
>E[cl\5$E
/** 6M259*ME
* @author treeroot %hcY [F<
* @since 2006-2-2 v3.JG]zLpP
* @version 1.0 eUx|_*`
*/ Y~fds#y0
public class SortUtil { S(9fGh
public final static int INSERT = 1; ]e)<CE2
public final static int BUBBLE = 2; ]7c715@
public final static int SELECTION = 3; IuB0C!'
public final static int SHELL = 4; C!~&c7
public final static int QUICK = 5; Y/)>\
public final static int IMPROVED_QUICK = 6; /d8PDc"
public final static int MERGE = 7; MP0gLi
public final static int IMPROVED_MERGE = 8; Yl>@(tu)|
public final static int HEAP = 9; $+:_>n^#/
FW=oP>f]w
public static void sort(int[] data) { AqE . TK
sort(data, IMPROVED_QUICK); .P-@ !Q5*
} b s:E`Q
private static String[] name={ "aAzG+NM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CbI[K|
}; gnx!_H\h<
vY}/CBmg
private static Sort[] impl=new Sort[]{ uK3,V0 yz
new InsertSort(), =#n|t[h-
new BubbleSort(), A2*z
new SelectionSort(), G#3 O^,m
new ShellSort(), #pE:!D
new QuickSort(), v34XcA
new ImprovedQuickSort(), v7xc01x
new MergeSort(), N\<M4fn
new ImprovedMergeSort(), a:v&pj+|<
new HeapSort() %k5^n0|*
}; Fag%#jxI
/_aFQ>.4n
public static String toString(int algorithm){ K`PF|=z
return name[algorithm-1]; nwHi3ojD:
} Xxp<qIEm
l*b3Mg
public static void sort(int[] data, int algorithm) { k+&LOb7
impl[algorithm-1].sort(data); r5tv9#4]
} fh}\#WE"
WPpl9)Qc
public static interface Sort { v#nYH?+~mJ
public void sort(int[] data); EcBSi995dj
} I tp7X
Lc0^I<Y
public static void swap(int[] data, int i, int j) { "P"~/<:)
int temp = data; ?_}[@x
data = data[j]; bC)diC
data[j] = temp; "*XR'9~7
} L%U-MOS=
} "4oY F:h