[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; Fv~20G(O
} ^ DaBz\
int i1=l; kW;+|qs^
int i2=mid+1; QRHu3w
for(int cur=l;cur<=r;cur++){ G`cHCP_n
if(i1==mid+1) /t+f{VX$
data[cur]=temp[i2++]; B"h#C!E
else if(i2>r) \-h%O jf4
data[cur]=temp[i1++]; vB.E3r=
else if(temp[i1] data[cur]=temp[i1++]; )J2mM
else ]^h]t~
data[cur]=temp[i2++]; ,:%CB"J
} r[|Xy>Zj
} B3We|oe!
/rWd=~[MO
} B<5R
A P)L:7w'e
改进后的归并排序: );#JL0I
FHj" nB
package org.rut.util.algorithm.support; uatm/o^~,
4ezEW|S
import org.rut.util.algorithm.SortUtil; -`'I{g&A
r)y=lAyF>
/** 6wBx;y |
* @author treeroot &XIt5<$~R
* @since 2006-2-2 wjHzE
* @version 1.0 wxKX{Bs
*/ kVkU)hqR
public class ImprovedMergeSort implements SortUtil.Sort { MqW7cjg
:flx6,7D
private static final int THRESHOLD = 10; \y97W&AN
cS5Pl
/* `7c~mypx
* (non-Javadoc) &v56#lG
* dMh:ulIY>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,)0H3t
*/ kjIAep0rT
public void sort(int[] data) { i6^twK)j
int[] temp=new int[data.length]; w mn+
mergeSort(data,temp,0,data.length-1); CSJdvxb
} fT;s-v[`k
RSfQNc9Z
private void mergeSort(int[] data, int[] temp, int l, int r) { ^]H5h]U'
int i, j, k; Kz~ps 5
int mid = (l + r) / 2; 6/5YjO|a
if (l == r) p2#)A"
return; ?^7t'`zk
if ((mid - l) >= THRESHOLD) ;y,5k?
mergeSort(data, temp, l, mid); HJ9Kz^TnC
else t)~"4]{*}D
insertSort(data, l, mid - l + 1); QA< Rhv,
if ((r - mid) > THRESHOLD) $mu^G t
mergeSort(data, temp, mid + 1, r); v&9y4\j
else 51#_Vg
insertSort(data, mid + 1, r - mid); m,VOx7%n
N:S/SZI
for (i = l; i <= mid; i++) { `tBgH_$M
temp = data; FEW14U'O
} }u\])I3
for (j = 1; j <= r - mid; j++) { N@2dA*T,
temp[r - j + 1] = data[j + mid]; +NeOSQSj
} (jnQ -
int a = temp[l]; X.OD`.!>
int b = temp[r]; zZ7;jyD
for (i = l, j = r, k = l; k <= r; k++) { ! +a.Ei
if (a < b) { *F+KqZ.2
data[k] = temp[i++]; 8*W#DH!
a = temp; iJ-23_D
} else { \MA+f~)9
data[k] = temp[j--]; %>yG+Od5Z
b = temp[j]; ]_Vx{oT7
} VyXKZ%\dQ/
} lsJSYJG&
} |N4.u _hM
tWJZoD6}h
/** \RNNg
* @param data A}BVep@D
* @param l n D0K).=Q
* @param i zpzK>DH(
*/ ],>@";9u"
private void insertSort(int[] data, int start, int len) { R]vV*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KT_!d*
} O(#)m>A
} srr :!5
} ?5+.`L9H
} viW!,QQ(S
VEH&&@d
堆排序： "An,Q82oHf
DjCqh-&L
package org.rut.util.algorithm.support; ~d o9;8v
_ q(ko/T
import org.rut.util.algorithm.SortUtil; cpe+XvBuK
&SIq2>QA
/** g$":D
* @author treeroot yd^{tQi
* @since 2006-2-2 j5QuAU8
* @version 1.0 cW~}:;D4
*/ %r<rcY
public class HeapSort implements SortUtil.Sort{ /vY(o1o x
x5|I
/* (non-Javadoc) ;PF`Wj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <>n0arAn
*/ xVf|G_5$
public void sort(int[] data) { IrR7"`.i
MaxHeap h=new MaxHeap(); BIb4h
h.init(data); __lM7LFL
for(int i=0;i h.remove(); &Q9qq~
System.arraycopy(h.queue,1,data,0,data.length); j>*S5y.{
} 6h>wt-tRC
Qwz}B
private static class MaxHeap{ HpR]q05d
bo<~jb{
void init(int[] data){ xqXo0
this.queue=new int[data.length+1]; ~fBtQGdX
for(int i=0;i queue[++size]=data; $[9%QQk5<L
fixUp(size); cec9l65d
} yID164&r
} D_?K"E=fw
HvUxsdT
private int size=0; zUDg&-J3
Hh%I0#
private int[] queue; 7@C<oy_bb
BoA/6FRi[
public int get() { NnO~dRx{
return queue[1]; 8{Q<N%Jnu
} sI43@[
:KH g&ZX7
public void remove() { ?J'Y&
SortUtil.swap(queue,1,size--); |D'4uN8\
fixDown(1); m9)p-1y@5
} 7t3X)Ah
file://fixdown OHv[#xGuV?
private void fixDown(int k) { 9*$t!r{B@
int j; @<<<C?CTv
while ((j = k << 1) <= size) { ^m L@e'r
if (j < size %26amp;%26amp; queue[j] j++; KTK <gV9:
if (queue[k]>queue[j]) file://不用交换 zh4#A <e
break; g6nkZyw
SortUtil.swap(queue,j,k); 6L:x^bM
k = j; ml2_ ]3j!
} agkA}O
} eD-#b|
private void fixUp(int k) { hS_6
while (k > 1) { XV!6dh!
int j = k >> 1; yh^!'!I6u[
if (queue[j]>queue[k]) Yi .u"sh]
break; YgKZ#?*
SortUtil.swap(queue,j,k); "BD~xP(
k = j; |].pDwgt
} ^*S ,xP
} 7}1~%:6
ODZ5IO}v
} soPLA68
PiYY6i0
} P D4Tz!F
{-ZFp
SortUtil： WegtyO
n-5W*zk1
package org.rut.util.algorithm; [N1hWcfvd
J~=n`pW
import org.rut.util.algorithm.support.BubbleSort; _\=`6`b)
import org.rut.util.algorithm.support.HeapSort; Mc#*wEo)8
import org.rut.util.algorithm.support.ImprovedMergeSort; a5 *2h{i
import org.rut.util.algorithm.support.ImprovedQuickSort; A2^\q>_#
import org.rut.util.algorithm.support.InsertSort; )64@2~4y
import org.rut.util.algorithm.support.MergeSort; a-y+@#;2_
import org.rut.util.algorithm.support.QuickSort; .id)VF-l
import org.rut.util.algorithm.support.SelectionSort; ;V^ 112|C
import org.rut.util.algorithm.support.ShellSort; u?>B)PW
C?ulj9=Z
/** vesJEaw7
* @author treeroot & +4gSr
* @since 2006-2-2 0ph{
* @version 1.0 vK(i9>;7
*/ :!/gk8F|dI
public class SortUtil { m#ZO`W
public final static int INSERT = 1; 17D"cP
public final static int BUBBLE = 2; [qdRUV'
public final static int SELECTION = 3; kR]!Vr*yh
public final static int SHELL = 4; %cCs?ic
public final static int QUICK = 5; XIvn_&d;G
public final static int IMPROVED_QUICK = 6; s?zAP O8Sz
public final static int MERGE = 7; D*Ik7Pe
public final static int IMPROVED_MERGE = 8; fKp#\tCc y
public final static int HEAP = 9; MWI4Y@1bS
c;{Q,"9U
public static void sort(int[] data) { N+zKr/
sort(data, IMPROVED_QUICK); :]rJGgK#
} bB }$'
private static String[] name={ u4.ngjJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :1 (p.q=
}; _tSAI
Wqc)Fv70m
private static Sort[] impl=new Sort[]{ RlheQTJ
new InsertSort(), #Pw2Q
new BubbleSort(), !h(|\" }
new SelectionSort(), y'(Ne=y
new ShellSort(), ]V-W~r=
new QuickSort(), HQ|MhM/"
new ImprovedQuickSort(), l_EM8pL,f
new MergeSort(), <cZGxff01
new ImprovedMergeSort(), ( xXGSx
new HeapSort() z?[r
}; rm4.aO~-F
ikSF)r;*t
public static String toString(int algorithm){ Au{<hQ=
return name[algorithm-1]; =1O<E
} AgOp.~*Z~V
4 SHU
public static void sort(int[] data, int algorithm) { 3<k`+,'
impl[algorithm-1].sort(data); O:TlIJwW
} u)3 $~m~
^Y u6w\QM
public static interface Sort { YFE&r
public void sort(int[] data); S;~g3DCd
} (T>nPbv)
@Ys!DScY,
public static void swap(int[] data, int i, int j) { \%/#x V
int temp = data; B.g[c97
data = data[j]; X/z6"*(|/
data[j] = temp; ZiYm:$CJ
} bV edFm
} +E1I");