[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; t,+p!"MRY
} 7v1}8Uk
int i1=l; }**^g:
int i2=mid+1; @@}A\wA-
for(int cur=l;cur<=r;cur++){ UT"L5{c
if(i1==mid+1) A9F Z`
data[cur]=temp[i2++]; h%#@Xd>.
else if(i2>r) v)BUt,A
data[cur]=temp[i1++]; I9B B<~4o
else if(temp[i1] data[cur]=temp[i1++]; Bojm lVg
else HD Eqq
data[cur]=temp[i2++]; )07M8o!^l
} QiY7m<3
} tBdvk>d
erqg|TsFj
} "x&H*"
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改进后的归并排序: MwXgaSV
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package org.rut.util.algorithm.support; M,|o2'
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import org.rut.util.algorithm.SortUtil; OpYq qBf_
@ -g^R4e<
/** *j8w" 4
* @author treeroot &:w{[H$-
* @since 2006-2-2 !i{@B
* @version 1.0 nbhx2@Teqe
*/ *F2obpU
public class ImprovedMergeSort implements SortUtil.Sort { 9v0f4Pbxm
#kk_iS>8
private static final int THRESHOLD = 10; Nqz-Mr`
I5PaY.i
/* 5Gg`+o
* (non-Javadoc) @zSoPDYv,
* H`m|R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %/s:G)
*/ Onby=Y o6
public void sort(int[] data) { 3KP6M=
int[] temp=new int[data.length]; $ 5
mergeSort(data,temp,0,data.length-1); vP?"MG
} }Li24JK
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private void mergeSort(int[] data, int[] temp, int l, int r) { BwrMRMq"
int i, j, k; [K%Jt
int mid = (l + r) / 2; [JsQ/|=z
if (l == r) lLoFM
return; X=_N7!
if ((mid - l) >= THRESHOLD) sLb[ZQ;j
mergeSort(data, temp, l, mid); H#G'q_uHH
else PJ9JRG7j
insertSort(data, l, mid - l + 1); H?M8j] R-)
if ((r - mid) > THRESHOLD) r's4-\
mergeSort(data, temp, mid + 1, r); 7RTp+FC]
else dAohj QH:
insertSort(data, mid + 1, r - mid); (8k3z`
>lN{FJ
for (i = l; i <= mid; i++) { r!#NFek}
temp = data; Qq^>7OU>Co
} A.*}<
for (j = 1; j <= r - mid; j++) { TE^BfAw@
temp[r - j + 1] = data[j + mid]; Uo5l =\
} b'uH4[zX%
int a = temp[l]; kQwBrb4
int b = temp[r]; EVrOu""
for (i = l, j = r, k = l; k <= r; k++) { #W'jNX,h
if (a < b) { >=[w{Vn'Mf
data[k] = temp[i++]; ,]1K^UeZ
a = temp; !dStl:B
} else { `QAotSO+
data[k] = temp[j--]; jcv3ES^
b = temp[j]; \*1pFX#
} EivZI<<a
} .Mdxbs6.C
} D@FJVF7c
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/** 4:5CnK
* @param data 315Rk!{AJ
* @param l !2$O^ }6"
* @param i \} P}H
*/ OT\[qaK
private void insertSort(int[] data, int start, int len) { zT`LPs6T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K%$%9y
} ,B h[jb`y
} )#M*@e$k
} Ga"$_DyM
} 5}E8Tl
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堆排序： 'l!tQD!
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package org.rut.util.algorithm.support; \P+lb-~\"
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import org.rut.util.algorithm.SortUtil; SPn0D9b]
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/** +mYD DlvI
* @author treeroot rG}o!I`z
* @since 2006-2-2 pkM_ @K
* @version 1.0 '$UlJDZ
*/ mdtq-v
public class HeapSort implements SortUtil.Sort{ j ]F Zy
r[JgCj+$&
/* (non-Javadoc) {{SeD:hx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l%rwJLN1
*/ /t(dhz&xN
public void sort(int[] data) { 5!NK
MaxHeap h=new MaxHeap(); km4::'(6
h.init(data); t/#[At5p=
for(int i=0;i h.remove(); 9#@dQ/*
System.arraycopy(h.queue,1,data,0,data.length); QY/36gK
} 4JT9EKo
K.dgQ-vn
private static class MaxHeap{ zl=RK
pEw &i
void init(int[] data){ RiIJ#:6+^I
this.queue=new int[data.length+1]; Ck/4hZ
for(int i=0;i queue[++size]=data; Ti=~ycwi
fixUp(size); \:'=ccf
} U;LbP-{B
} m("! M~1
Jx[IHE
private int size=0; =k2In_
bWW$_Spr
private int[] queue; qWfG@hn
AN\:
public int get() { '&xv)tno
return queue[1]; K\`L>B. 1
} mflH&Bx9
x$cs_q]J
public void remove() { ^$4d'
SortUtil.swap(queue,1,size--); 4M}u_}9
fixDown(1); F9^8/Z
} N;9@-Tb
file://fixdown wh<+.Zp
private void fixDown(int k) { R]0awV1b
int j; e3yBB*@
while ((j = k << 1) <= size) { w<lHY=z E
if (j < size %26amp;%26amp; queue[j] j++; {]n5h#c 5*
if (queue[k]>queue[j]) file://不用交换 @K7#}7,t
break; U:M?Ji5CY
SortUtil.swap(queue,j,k); /0uZ(F|>I
k = j; #e((F,1z
} Mp:tcy,*
} ^^qB=N[';
private void fixUp(int k) { H$9--p
while (k > 1) { SYOND>E
int j = k >> 1; l23_K7
if (queue[j]>queue[k]) /o*r[g7<
break; BHy#g>KUF
SortUtil.swap(queue,j,k); 6HW<E~G'6
k = j; .nJErC##
} loZJV M
} y<.0+YL-e+
(A}##h
} ;3s_#L
L 5J=+k,
} =cs;avtL
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SortUtil： Eb7qM.Q] &
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package org.rut.util.algorithm; ZTfs&5
D0Oh,Fe#M\
import org.rut.util.algorithm.support.BubbleSort; <(TTYf8lS
import org.rut.util.algorithm.support.HeapSort; x JQde4
import org.rut.util.algorithm.support.ImprovedMergeSort; }eXzs_
import org.rut.util.algorithm.support.ImprovedQuickSort; =toqEm~
import org.rut.util.algorithm.support.InsertSort; j{?,nJdQ
import org.rut.util.algorithm.support.MergeSort; 2$. ubA
import org.rut.util.algorithm.support.QuickSort; (30{:o&^
import org.rut.util.algorithm.support.SelectionSort; ;;pxI5
import org.rut.util.algorithm.support.ShellSort; c^S^"M|
9[N+x2q
/** lX/6u E_%
* @author treeroot dq%7A=-
* @since 2006-2-2 jhr{JApbJv
* @version 1.0 :vz_f$=
*/ g4cmYg3
public class SortUtil { *z!!zRh3x
public final static int INSERT = 1; m646|G5
public final static int BUBBLE = 2; J*Dj`@`4`g
public final static int SELECTION = 3; -9Wx;u4]o
public final static int SHELL = 4; @%q0fj8b
public final static int QUICK = 5; lR\=] ]7I>
public final static int IMPROVED_QUICK = 6; HaXlc8
public final static int MERGE = 7; >:!TfuU^R
public final static int IMPROVED_MERGE = 8; JEL=,0J
public final static int HEAP = 9; qOVs9'R
O;h]
public static void sort(int[] data) { (9]`3^_,J
sort(data, IMPROVED_QUICK); ,R5NKWo
} <7fF9X
private static String[] name={ ]1>U@oK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :A%uXgK<k
}; TBHIcX
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private static Sort[] impl=new Sort[]{ b*S:wfw
new InsertSort(), g^OU+7o
new BubbleSort(), 8aQ\Yx
new SelectionSort(), B<i)je!
new ShellSort(), 8 !]$ljg
new QuickSort(), \Q7Nz2X
new ImprovedQuickSort(), R,-y
new MergeSort(), 9!zUv:;
new ImprovedMergeSort(), 2siUpmX
new HeapSort() Gnop
}; !:PF |dZ
FVNxjMm,
public static String toString(int algorithm){ R| [mp%Q
return name[algorithm-1]; Y[k%<f
} 4vq,W_n.hQ
xwhH_[
public static void sort(int[] data, int algorithm) { 2qLRcA=R
impl[algorithm-1].sort(data); SV}q8z\
} p(in.Xz
>H?l[*9
public static interface Sort { 9=7),`$
public void sort(int[] data); j38>,9u,
} 1A"h!;0
*xR;}%s\
public static void swap(int[] data, int i, int j) { 4:RL[;
int temp = data; y Dg
data = data[j]; gVjI1{WTK
data[j] = temp; <yz)iCU?
} hG .>>
} xjB2?:/2