[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; _ ?Z :m
} !RwOUCk
int i1=l; o9uir"=
int i2=mid+1; =qVD"Z]z
for(int cur=l;cur<=r;cur++){ ?]u=5gqUU
if(i1==mid+1) {H%1sI
data[cur]=temp[i2++]; 0CRk&_ht
else if(i2>r) ~b.e9FhdA
data[cur]=temp[i1++]; ZtqN8$[6n
else if(temp[i1] data[cur]=temp[i1++]; Nb@zn0A(;
else %QrpFE5V5
data[cur]=temp[i2++]; >R}p*=J
} 9q!./)
} 5A=FEg
]QAMCu(>
} l@ W?qw
@.h|T)Zyr
改进后的归并排序: Vy[ m%sEP
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package org.rut.util.algorithm.support; ,BG L|5?3z
9N]V F'
import org.rut.util.algorithm.SortUtil; 2DTBL:?`
Y:}!W
/** \@HsMV2+zN
* @author treeroot )$e_CJ}9e
* @since 2006-2-2 7cJh^M
* @version 1.0 w(Hio-l=
*/ 42mZ.,<
public class ImprovedMergeSort implements SortUtil.Sort { uKocEWB=/F
gT~Yn~~b
private static final int THRESHOLD = 10; ;nB.f.e`
/DBldL7yi
/* $q~:%pQv
* (non-Javadoc) Gt;59}
* 1ti4 ZM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3A.T_mGCs
*/ 1W +QcK4k
public void sort(int[] data) { D/-$~u_o
int[] temp=new int[data.length]; L H`z '7&/
mergeSort(data,temp,0,data.length-1); Td6"o&0A!
} VDP \E<3"
xK3}zN$T
private void mergeSort(int[] data, int[] temp, int l, int r) { ,HLgb}~
int i, j, k; _YgvLz %
int mid = (l + r) / 2; I,xV&j+<
if (l == r) 2E":6:Wsw
return; m@){@i2.
if ((mid - l) >= THRESHOLD) <ny)yK
mergeSort(data, temp, l, mid); eDPmUlC+-
else Gv3AJ'NL
insertSort(data, l, mid - l + 1); `<:D.9vO "
if ((r - mid) > THRESHOLD) A(Ss:7({
mergeSort(data, temp, mid + 1, r); _7LZ\V+MLW
else 1Xi.OGl
insertSort(data, mid + 1, r - mid); Hs~u&c
NXw$PM|+R
for (i = l; i <= mid; i++) { g$jZpU
temp = data; E}WO?xxv74
} $m-rn'Q
for (j = 1; j <= r - mid; j++) { h!L6NS_Q,
temp[r - j + 1] = data[j + mid]; zU)Ib<$
} 4D-4BxN*
int a = temp[l]; }}'0r2S
int b = temp[r]; V]$Tbxg
for (i = l, j = r, k = l; k <= r; k++) { (NBq!;_2,x
if (a < b) { ?yq1\G)]
data[k] = temp[i++]; (n,!v)
a = temp; fudIUG.
} else { o@&dd NO
data[k] = temp[j--]; l6lyRJ
b = temp[j]; hh<Es|v
} s;;"^5B.
} T$ )dc^
} h NCoX*icd
ZOK,P
/** Dqw?3 KB
* @param data Z/S7ei@56
* @param l oHbG-p
* @param i FX#fh 2
*/ #AJo75E%
private void insertSort(int[] data, int start, int len) { ![,W?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _s_%}8o
} *uq}jlD`!
} 3bi,9 >%
} ?Gq|OT8
} nd[{DF?)/
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堆排序： D^5bzZk N
c=}#8d.
package org.rut.util.algorithm.support; LZB=vc|3/
O*ql!9}E{
import org.rut.util.algorithm.SortUtil; x(Us O}
0Lo)Ni^"
/** 5k^UZw
* @author treeroot `]8z]PD
* @since 2006-2-2 9"H]zfW
* @version 1.0 ;m+*R/
*/ Oa'DVfw2J
public class HeapSort implements SortUtil.Sort{ n!B*n(;!u
H^c8r^#
/* (non-Javadoc) i.e1?Zk1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;=FSpZ@
*/ d/k70Ybk
public void sort(int[] data) { dt -=7mz#
MaxHeap h=new MaxHeap(); JAK+v
h.init(data); f2JeXsOI
for(int i=0;i h.remove(); 8"zFTP*;u
System.arraycopy(h.queue,1,data,0,data.length); d,_Ky#K5b
} n!r<\4I
_U"9#<
private static class MaxHeap{ Whd2mKwiO
J(
void init(int[] data){ M%evk4_27
this.queue=new int[data.length+1]; ]R$ u3F
for(int i=0;i queue[++size]=data; I+?9}t
fixUp(size); #xMl<
} />Z`?
} v^=Po6S[{+
NRM=0-16u$
private int size=0; VoOh$&"M
\!erP!$x.
private int[] queue; $X9`~Sv _
bk-veJR
public int get() { TA.ugF)h
return queue[1]; .^fVm
} J m5).
fR&;E
public void remove() { '9+JaB
SortUtil.swap(queue,1,size--); \Tc<27-
fixDown(1); pE<@
} b=5"*=T{+
file://fixdown |bwz
private void fixDown(int k) { Lad8C
int j; vbo:,]T<A
while ((j = k << 1) <= size) { 9\_^"5l
if (j < size %26amp;%26amp; queue[j] j++; !&$uq|-
if (queue[k]>queue[j]) file://不用交换 (^:0g.~c
break; ,[ UqUEO
SortUtil.swap(queue,j,k); eCDwY:t`
k = j; GI~JIXHTQ
} yZ_6yJw3}
} oV)#s!
private void fixUp(int k) { fL #e4
while (k > 1) { R|jt mI?
int j = k >> 1; F ka^0
if (queue[j]>queue[k]) (9#$za>
break; *?2aIz"
SortUtil.swap(queue,j,k); &DX&*Xq2
k = j; /Ria"lLv
} % Rv;e
} e;M#MkP7
8QYP\7}o
} jf`QoK
)(?,1>k`Z
} jvI!BZ
M@k8;_5
SortUtil： l@ amAusE
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package org.rut.util.algorithm; e ej:
lo1<t<w`
import org.rut.util.algorithm.support.BubbleSort; D#=$? {w
import org.rut.util.algorithm.support.HeapSort; }#u.Of`6"
import org.rut.util.algorithm.support.ImprovedMergeSort; b6`_;Z
import org.rut.util.algorithm.support.ImprovedQuickSort; \iBEyr]
import org.rut.util.algorithm.support.InsertSort; K@JGGgrE`!
import org.rut.util.algorithm.support.MergeSort; kBh*@gf
import org.rut.util.algorithm.support.QuickSort; ~HFqAOr
import org.rut.util.algorithm.support.SelectionSort; ;;^OKrzWW
import org.rut.util.algorithm.support.ShellSort; >TB"Ez09
G`/5=
/** kB2]Z}
* @author treeroot P}2i[m.*,
* @since 2006-2-2 3 #8bG(
* @version 1.0 5^,"Ve|
*/ FZvh]ZX
public class SortUtil { p;y\%i_
public final static int INSERT = 1; Y#VtZTcT
public final static int BUBBLE = 2; eWN[EJI<
public final static int SELECTION = 3; GOKca%DT=
public final static int SHELL = 4; ,2|(UTv
public final static int QUICK = 5; Oc Gg'R7
public final static int IMPROVED_QUICK = 6; mMNT.a
public final static int MERGE = 7; %`4\ 8H`
public final static int IMPROVED_MERGE = 8; ;?{N=x8
public final static int HEAP = 9; *%3%Zj,{
'ie+/O@G
public static void sort(int[] data) { T{A_]2 G
sort(data, IMPROVED_QUICK); tdCD!rV`{
} TFQX}kr]
private static String[] name={ b1*5#2rs.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C[-M ~yIL
}; Jq5](F!z
K P1;u#v
private static Sort[] impl=new Sort[]{ ?tA<:.<vtY
new InsertSort(), 8\N`2mPt
new BubbleSort(), >FR;Ux~a
new SelectionSort(), A-&'/IHR"B
new ShellSort(), )YtdU(^J$
new QuickSort(), ?;bsg9
new ImprovedQuickSort(), JO3x#1~;_
new MergeSort(), qg`8f?
new ImprovedMergeSort(), 6>X9|w
new HeapSort() {:63% j
}; iI]E%H}
I+!?~]AUuq
public static String toString(int algorithm){ @VzD>?)
return name[algorithm-1]; ~S85+OJ;M
} pzQWr*5a
kKFhbHUZa
public static void sort(int[] data, int algorithm) { (}4]U=/nV
impl[algorithm-1].sort(data); h1(GzL%i_
} +o4W8f=Ga
apkmb<
public static interface Sort { mj7Em&
public void sort(int[] data); zrazbHI
} ;X zfd
Rxf.@E
public static void swap(int[] data, int i, int j) { DNyU]+\L[l
int temp = data; >Oz~j>jL
data = data[j]; ,&q Q[i
data[j] = temp; "!AbH<M;@
} %3@a|#g
} |Ok=aV7