[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; $fhR1A
} UfNcI[xr
int i1=l; Njmb{L]Cps
int i2=mid+1; :5-t$^R
for(int cur=l;cur<=r;cur++){ 0-~F%:x
if(i1==mid+1) uE ^uP@d
data[cur]=temp[i2++]; "MPr'3
else if(i2>r) $lAQcG&Q
data[cur]=temp[i1++]; q |Orv=v
else if(temp[i1] data[cur]=temp[i1++]; @#>YU
else tE$oV
data[cur]=temp[i2++]; }I"k=>Ycns
} V2B: DIpr
} G@4n]c_
L$3{L"/
} 7csMk5NU'<
Qm)c!
改进后的归并排序: S^:7V[=EgI
=KW~k7TaN
package org.rut.util.algorithm.support; 3>#io^35
Jz@2?wSp
import org.rut.util.algorithm.SortUtil; VfT@;B6ALF
1uJpn
/** K9_@[}Ge
* @author treeroot lhBu?q
* @since 2006-2-2 (J5M+K\H
* @version 1.0 u|sdQ
*/ EG J/r
public class ImprovedMergeSort implements SortUtil.Sort { AkEt=vI
ayZWt| iHA
private static final int THRESHOLD = 10; k0IztFyj:R
dk_! ~Z
/* e% #?B *
* (non-Javadoc) ~93#L_V_O
* q!as~{!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n%d7`?tm4
*/ +EvY-mwfQ
public void sort(int[] data) { -1%AM40j
int[] temp=new int[data.length]; m+EtB6r
mergeSort(data,temp,0,data.length-1); Kwo0%2Onkd
} 5n1T7-QCL
d:g0XP
private void mergeSort(int[] data, int[] temp, int l, int r) { 2rrC y C
int i, j, k; #^9a[ZLj0
int mid = (l + r) / 2; tKCX0UZ'
if (l == r) ,xg(F0q
return; <.U(%`|
if ((mid - l) >= THRESHOLD) +-PFISa<r
mergeSort(data, temp, l, mid); gCZm7dgo
else M!O &\2Q
insertSort(data, l, mid - l + 1); }UWi[UgA
if ((r - mid) > THRESHOLD) '^`%
mergeSort(data, temp, mid + 1, r); | W<jN
else roNs~]6
insertSort(data, mid + 1, r - mid); vPET'Bf(YV
]DK.4\^
for (i = l; i <= mid; i++) { PX5U)
temp = data; |D~#9
} [g@.dr3t
for (j = 1; j <= r - mid; j++) { !U~S7h}
temp[r - j + 1] = data[j + mid]; MNH-SQB|
} n=%D}W
int a = temp[l]; B18?)LA
int b = temp[r]; BUU ) Sz
for (i = l, j = r, k = l; k <= r; k++) { #F:\_!2c
if (a < b) { >]/aG!
data[k] = temp[i++]; tREC)+*\
a = temp; S!g0J}.z
} else { f"d4HZD^
data[k] = temp[j--]; (2'q~Z+>'
b = temp[j]; )'e9(4[V1
} Vee;&
} f=Kt[|%'e
} ~?:Xi_3Lo
VRvX^w0
/** vve[.Lud'
* @param data f= 33+8I
* @param l JA "
* @param i %P`|kPW1
*/ l/6(V:
private void insertSort(int[] data, int start, int len) { M*<Bp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W-ol*S
} F5YHc$3^
} =f=,YcRn+
} 5`f\[oA
} D|"^ :Gi
H 2UR
堆排序： k^Uk=)9
~.<}/GP]_
package org.rut.util.algorithm.support; p&cJo<]=LE
c3|/8
import org.rut.util.algorithm.SortUtil; 7w5 L?,a
ziG]BZ
/** fXB64MNo
* @author treeroot j(`V&S
* @since 2006-2-2 [p 8fg!|
* @version 1.0 br7_P1ep
*/ #brV{dHV,
public class HeapSort implements SortUtil.Sort{ S0mF%"
E@S5|CM
/* (non-Javadoc) -%g{{'9B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) few=`%/
*/ D(^ |'1
public void sort(int[] data) { =RQ\i6Y
MaxHeap h=new MaxHeap(); bcE%EQ
h.init(data); ^|h})OHV
for(int i=0;i h.remove(); TF;}NQ
System.arraycopy(h.queue,1,data,0,data.length); O-YB+~"3Z
} <j$n7#qk
Q)b*; @
private static class MaxHeap{ < &~KYu\r
kqie|_y
void init(int[] data){ YQk<1./}I
this.queue=new int[data.length+1]; STH?X] /
for(int i=0;i queue[++size]=data; 3gzcpFNqX
fixUp(size); <xWBS/K
} 6su^yt
} N#? Ohz
`:fc*n,*
private int size=0; Q-LDFnOFwp
y 2v69nu~q
private int[] queue; #aV2+`d
Q #%C)7)
public int get() { |p7k2wzN
return queue[1]; A&~<qgBTp
} l;gj],*
(ON_(MN
public void remove() { G~\ SI.
SortUtil.swap(queue,1,size--); fm%1vM$[J
fixDown(1); 9O/l{
} ^?3e?Q?
file://fixdown (YJ]}J^
private void fixDown(int k) { 4vk^=
int j; }m6j6uAR6)
while ((j = k << 1) <= size) { nxc35
if (j < size %26amp;%26amp; queue[j] j++; mjd9]HgN
if (queue[k]>queue[j]) file://不用交换 K{)YnY_E;
break; m%hUvG| i
SortUtil.swap(queue,j,k); gZs UX^%
k = j; Z-!W#
} XVfp* `
} $^2 j#]uX
private void fixUp(int k) { 1z\>>N$7B
while (k > 1) { :z EhPx;B7
int j = k >> 1; *Iu .>nw
if (queue[j]>queue[k]) h%Nbx:vKk
break; 9xvE?8;M#
SortUtil.swap(queue,j,k); Xjal6e)[
k = j; J!@$lyH
} J jCzCA:K_
} p[QF3)9F
p1=sDsLL
} 'y#kRC=G:
RoXU>a:nS
} NC;4
MR90}wXE
SortUtil： {.We%{4V
$V"~\h8
package org.rut.util.algorithm; VY'#>k}}
2w=0&wG4K
import org.rut.util.algorithm.support.BubbleSort; Zcg=a_
import org.rut.util.algorithm.support.HeapSort; 4"e7 43(
import org.rut.util.algorithm.support.ImprovedMergeSort; )T6+}
import org.rut.util.algorithm.support.ImprovedQuickSort; T8.@}a
import org.rut.util.algorithm.support.InsertSort; uOEFb
import org.rut.util.algorithm.support.MergeSort; ku*|?uF
import org.rut.util.algorithm.support.QuickSort; {Ex0mw)T
import org.rut.util.algorithm.support.SelectionSort; q_8qowu"
import org.rut.util.algorithm.support.ShellSort; K \}xb2s
snTj!rV/_
/** A+j~oR
* @author treeroot {y|y68y0+
* @since 2006-2-2 l}X3uyS
* @version 1.0 J#CF SG
*/ d]h[]Su/?
public class SortUtil { MB\vgKY
public final static int INSERT = 1; H BmjB=
public final static int BUBBLE = 2; ;w?zmj<Dm
public final static int SELECTION = 3; ^!|BKH8>f%
public final static int SHELL = 4; J3Q.6e=7
public final static int QUICK = 5; ~s{$&N
public final static int IMPROVED_QUICK = 6; R+Ke|C
public final static int MERGE = 7; P/t$xqAL
public final static int IMPROVED_MERGE = 8; SsafRK$
public final static int HEAP = 9; kaUH#;c>_
k+-u4W
public static void sort(int[] data) { LL-MZ~ZB
sort(data, IMPROVED_QUICK); e)\s0#
} yA(H=L-=!1
private static String[] name={ 6ssZg@}nf{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2N(c&Dzkh`
}; *8"5mC;"
&e[/F@\%
private static Sort[] impl=new Sort[]{ 1h]Dc(Oc#=
new InsertSort(), L<QqQ"`
new BubbleSort(), [ OMcSd|nf
new SelectionSort(), &e_M \D
new ShellSort(), yXrFH@3
new QuickSort(), J_U1eSz<j
new ImprovedQuickSort(), 6}Y^X
new MergeSort(), suPQlU>2sj
new ImprovedMergeSort(), 0?SdAF[:z
new HeapSort() Dw;L=4F |
}; )F]E[sga
(sO;etW
public static String toString(int algorithm){ &^qD<eZ!Eq
return name[algorithm-1]; rN$_(%m_N
} ]O7I7K
7u\^$25+h
public static void sort(int[] data, int algorithm) { $>5|TG 0i
impl[algorithm-1].sort(data); b V;R}3)
} "]5]"F4]
"=9L7.E)
public static interface Sort { gGe `w
public void sort(int[] data); N}VKH5U|
} qN}0$x>p
vlm&)DIt
public static void swap(int[] data, int i, int j) { <G\q/!@_
int temp = data; yWFDGk
data = data[j]; XLg6?Nu
data[j] = temp; 1/6G&RB
} n/S1Hae`
} hM/|k0YV