[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; :U7m@3czU
} 4vk^=
int i1=l; mVBF2F<4
int i2=mid+1; 0$9I.%4jAJ
for(int cur=l;cur<=r;cur++){ 5c~OG6COx
if(i1==mid+1) FOU^Wcop%
data[cur]=temp[i2++]; C/!c?$J
else if(i2>r) K(M@#t1_&
data[cur]=temp[i1++]; !MiH^wP
else if(temp[i1] data[cur]=temp[i1++]; V\V:uo(C
else ]EzX$T
data[cur]=temp[i2++]; 'r5[tK}
} m8|&z{
} )@]Y1r4U
<2Qh5umQ
} +I+7@XiZ
+'NiuN
改进后的归并排序: ;i2N`t2
kM`!'0kt
package org.rut.util.algorithm.support; !y>MchNv
\5wC&|WEB
import org.rut.util.algorithm.SortUtil; N8>;BHBV!
ktr l|
/** I=,u7w`m
* @author treeroot ,DT=(
* @since 2006-2-2 cQaEh1n
* @version 1.0 v&>TU(x\H
*/ Z-!W#
public class ImprovedMergeSort implements SortUtil.Sort { UJ'}p&E
H...!c1M@
private static final int THRESHOLD = 10; kXq*Jq
^'|\8
/* VvO/
* (non-Javadoc) Wkk=x&
* hkO)q|1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +C{ %pF
*/ I\0mmdi73
public void sort(int[] data) { dpBG)Xzoyv
int[] temp=new int[data.length]; &&w7-
mergeSort(data,temp,0,data.length-1); o.}?K>5
} $cLtAo^W
'M*+HY\.0
private void mergeSort(int[] data, int[] temp, int l, int r) { (\si/&
int i, j, k; jF'azlT
int mid = (l + r) / 2; nx(O]R,Sw
if (l == r) L}&U%eD
return; E6-alBi%
if ((mid - l) >= THRESHOLD) ZU&I`q|Y6
mergeSort(data, temp, l, mid); ?^F#}>C
else Ah2%LXdHA
insertSort(data, l, mid - l + 1); *n)3y.s
if ((r - mid) > THRESHOLD) G}tq'#]E{z
mergeSort(data, temp, mid + 1, r); 2S1wL<qP
else xi6Fs, 2S
insertSort(data, mid + 1, r - mid); -L/5Nbup
Sdc;jK 9d!
for (i = l; i <= mid; i++) { $+Hv5]/hb
temp = data; z/7H/~d
} ")U`Wgx
for (j = 1; j <= r - mid; j++) { >mT< AQ
temp[r - j + 1] = data[j + mid]; 9Q".166
} >sE5zj|V
int a = temp[l]; 2w=0&wG4K
int b = temp[r]; x@I@7Pvo3
for (i = l, j = r, k = l; k <= r; k++) { W"mkNqH
if (a < b) { %$ ^yot
data[k] = temp[i++]; edPnC {?s
a = temp; _|MY/SN4A
} else { c FjC
data[k] = temp[j--]; 8VLr*83~8
b = temp[j]; 7oPBe1P,K+
} K5Fzmo a
} LB1.N!q1
} m7 !Fb
ku*|?uF
/** p&F=<<C
* @param data vm+EzmO,!
* @param l BCya5!uy
* @param i _Gy*";E
*/ AM}-dKei|
private void insertSort(int[] data, int start, int len) { GYiUne$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L4aT=of-
} {y|y68y0+
} S ~lw5
} uU`zbh}]L.
} (tEW#l'}
KM|[:v
堆排序： S<Q6b_D
>P5 EW!d
package org.rut.util.algorithm.support; `xkJ.,#Io
kTG}>I
import org.rut.util.algorithm.SortUtil; n<7#?X7
0[0</"K%1m
/** ^HKxaW9W
* @author treeroot `3r*Ae
* @since 2006-2-2 p&bQ_XOH
* @version 1.0 #]I:}Q51
*/ B$Jn|J"/6
public class HeapSort implements SortUtil.Sort{ 9VIsLk54^
;W#G<M&n'
/* (non-Javadoc) x>5#@SX J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hux#v>e
*/ 8T 6jM+ h
public void sort(int[] data) { mxjY-Kq
MaxHeap h=new MaxHeap(); ltHC+8aZ
h.init(data); udg;jR-^
for(int i=0;i h.remove(); :$[m[y7i
System.arraycopy(h.queue,1,data,0,data.length); ?S!lX[#v
} F1?@tcr'
NS=puo
private static class MaxHeap{ 9F kwtF
b/]C,P
void init(int[] data){ FFH-Kw,
this.queue=new int[data.length+1]; ~@R=]l"
for(int i=0;i queue[++size]=data; <"CG%RGP
fixUp(size); |U$oS2U\m
} f&^K>Jt1@#
} :4Sj2
U,Z.MPQ
private int size=0; =bf-+gZD
*8"5mC;"
private int[] queue; @q5!3Nz
bQ0m=BzF
public int get() { ~&k1P:#R
return queue[1]; V )1SZt@x
} n?aogdK$V
\I#2Mq?
public void remove() { LtH;#Q
SortUtil.swap(queue,1,size--); Yk<?HNf
fixDown(1); &e_M \D
} (q*T.
file://fixdown )R{4"&&2
private void fixDown(int k) { s<z{(a
int j; 4jis\W}%L3
while ((j = k << 1) <= size) { if:2sS9r
if (j < size %26amp;%26amp; queue[j] j++; i/oaKpPN
if (queue[k]>queue[j]) file://不用交换 3,tKqR7g
break; u-j$4\'
SortUtil.swap(queue,j,k); tb&{[|O^
k = j; Fg5c;sls
} ^b;.zhp8;N
} -YHlVz
private void fixUp(int k) { ,/:#=TuYm
while (k > 1) { l$d4g?Z
int j = k >> 1; <JYV G9s}
if (queue[j]>queue[k]) :(A]Bm3
break; rN$_(%m_N
SortUtil.swap(queue,j,k); rq}ew0&/
k = j; _l}&|:
} <J{VTk ~
} GIo&zPx
5x4JDaG2
} E+>Qpy
z{``v|K
} 6!Ji-'\"
;2)@NH
SortUtil： t1g)Y|@d
A(Ugam~}
package org.rut.util.algorithm; Jh M.P9
x1$fkNu
import org.rut.util.algorithm.support.BubbleSort; WK/Byd.Z
import org.rut.util.algorithm.support.HeapSort; WZ@nuK.39T
import org.rut.util.algorithm.support.ImprovedMergeSort; #\@*C=
import org.rut.util.algorithm.support.ImprovedQuickSort; E;D9S
import org.rut.util.algorithm.support.InsertSort; '(&.[Pk:"
import org.rut.util.algorithm.support.MergeSort; 6BLw 4m=h
import org.rut.util.algorithm.support.QuickSort; XLg6?Nu
import org.rut.util.algorithm.support.SelectionSort; _hAp@? M
import org.rut.util.algorithm.support.ShellSort; OPBnU@=R
q%Obrk
/** M<~z=B#
* @author treeroot ~naL1o_FZ
* @since 2006-2-2 ];Bh1
* @version 1.0 WJ=eV8Uk
*/ Skp&W*Ai
public class SortUtil { [=7|LHjU
public final static int INSERT = 1; #s)6u?N
public final static int BUBBLE = 2; MPT*[&\-
public final static int SELECTION = 3; 2m[z4V@`
public final static int SHELL = 4; E]6;nY?
public final static int QUICK = 5; C:l /%
public final static int IMPROVED_QUICK = 6; hqD]^P>l1
public final static int MERGE = 7; C{-e(G`Yd
public final static int IMPROVED_MERGE = 8; B Lw ssr.
public final static int HEAP = 9; [[Qu|?KEa
P8).Qn
public static void sort(int[] data) { Kt;h'?
sort(data, IMPROVED_QUICK); _CciU.1k&,
} 536H*HdN
private static String[] name={ x<~ pqq8]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j2=jD G
}; b,]hX
^4_.5~(
private static Sort[] impl=new Sort[]{ j1Q G-Rs&
new InsertSort(), AnP7KSN[\
new BubbleSort(), &#w] 2~|
new SelectionSort(), N'i%9SBcg
new ShellSort(), a5:YP
new QuickSort(), o[O-|XL_
new ImprovedQuickSort(), F%+/j5~^
new MergeSort(), I|n<B"Q6^
new ImprovedMergeSort(), @i$9c)D
new HeapSort() =UM30 P/
}; 2}/Z.)^Q
'n#;~
public static String toString(int algorithm){ uqXvN'Jr
return name[algorithm-1]; 4!XB?-.
} ow>^(>^~
Ym8G=KA
public static void sort(int[] data, int algorithm) { O0i_h<T
impl[algorithm-1].sort(data); o(u&n3Q'
} #78p#E
1*Yf[;L
public static interface Sort { py]m^)yc
public void sort(int[] data); xw&[ 9}Y
} %kxq"=3
kBS;SDl)
public static void swap(int[] data, int i, int j) { g>1yQ
int temp = data; |-e*^|
data = data[j]; mawomna
data[j] = temp; 2+s_*zM-
} )~rfx
} |ITp$_S