[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; t!D'ZLw
} XT0-"-q
int i1=l; |dIR v
int i2=mid+1; ;5X6`GlS#5
for(int cur=l;cur<=r;cur++){ AB=%yM7V*
if(i1==mid+1) }#zL)+XI
data[cur]=temp[i2++]; WO>A55Xya
else if(i2>r) RqROl!6
data[cur]=temp[i1++]; <h(AJX7wsD
else if(temp[i1] data[cur]=temp[i1++]; fWP]{z`
else ^%oH LsY9
data[cur]=temp[i2++]; h(WlJCln
} <n_?$ TJ
} a-*sm~u
su0K#*P&I
} \:'GAByy
;v8TT}R
改进后的归并排序: zkt~[-jm}
Dw=L]i :0v
package org.rut.util.algorithm.support; 1P]J3o
HSud$(w
import org.rut.util.algorithm.SortUtil; Eu|/pH=:
fMwF|;
/** lB}?ey
* @author treeroot s.(.OXD&
* @since 2006-2-2 ,]wab6sY
* @version 1.0 W *0!Z:?
*/ tFcQ.1
public class ImprovedMergeSort implements SortUtil.Sort { ( w4XqVT
m.P F'_)/
private static final int THRESHOLD = 10; ['QhC({
$y;w@^
/* kwi$%
* (non-Javadoc) 'q}Ud10c
* pyf'_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mR.j8pi
*/ =u0=)\0@r
public void sort(int[] data) { ZW M:Wj192
int[] temp=new int[data.length]; r6j[C"@
mergeSort(data,temp,0,data.length-1); !19T=p/:$
} -cUW,>E
mq{Z Q'
private void mergeSort(int[] data, int[] temp, int l, int r) { )t~ad]oM
int i, j, k; Tw\@]fw
int mid = (l + r) / 2; 4=MVn
if (l == r) '4{@F~fu
return; 3SM'vV0[
if ((mid - l) >= THRESHOLD) A._CCou
mergeSort(data, temp, l, mid); xK8m\=#
else +R?E @S
insertSort(data, l, mid - l + 1); Gb2|e.z
if ((r - mid) > THRESHOLD) hzbvR~rn
mergeSort(data, temp, mid + 1, r); '3XOU.
else l[ko)%7V
insertSort(data, mid + 1, r - mid); Qc33CA
yO-2.2h
for (i = l; i <= mid; i++) { (muJ-~CJk
temp = data; '"Cqq{*
} ks$5$,^T2o
for (j = 1; j <= r - mid; j++) { <F`9;WX
temp[r - j + 1] = data[j + mid]; 02 FLe*zQ
} HF*~bL
int a = temp[l]; )fXxkOd
int b = temp[r]; 5hqXMs
for (i = l, j = r, k = l; k <= r; k++) { | {zka.sJ
if (a < b) { `B?+1Gv
data[k] = temp[i++]; @MQfeM-@
a = temp; :~s"]*y
} else { y**L^uvr
data[k] = temp[j--]; Q3r]T.].h
b = temp[j]; };2Lrz9<
} !}A`6z
} n2aUj(Zs=
} y2k's
DvN_}h^nX
/** UB] tKn
* @param data depCqz@
* @param l ldG8hK
* @param i Ev#,}l+
*/ ?@A@;`0Y
private void insertSort(int[] data, int start, int len) { @#"K6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~+\A4BW
} b5p;)#
} }+ W5Snx
} Jbima>
} m:EYOe,w
")boY/ P/w
堆排序： q89yW)XG
E=v4|/['N
package org.rut.util.algorithm.support; ABEEJQ
{3Gj rE
import org.rut.util.algorithm.SortUtil; *~`oA~-Q
qvsfU*wo?
/** q9zeN:><
* @author treeroot j%vxCs>
* @since 2006-2-2 )W@
* @version 1.0 L7II>^"B
*/ ^wIP`dn
public class HeapSort implements SortUtil.Sort{ "{{@N4^
PzjIM!>
/* (non-Javadoc) Ux,dj8=o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F&/}x15
*/ p<VW;1bt5
public void sort(int[] data) { 4J[bh
MaxHeap h=new MaxHeap(); v&^N+>p
h.init(data); 7|m{hSc
for(int i=0;i h.remove(); 8Z@O%\1x6
System.arraycopy(h.queue,1,data,0,data.length); X7aj/:fXe
} hO3C _}
]~WIGl"g
private static class MaxHeap{ 8BIPEY -I?
Xp^>SSt:4
void init(int[] data){ F7p`zf@O]
this.queue=new int[data.length+1]; X bV?=
for(int i=0;i queue[++size]=data; -r_Pp}s
fixUp(size); =c[mch%E
} d[(%5pw~zL
} I7ySm12}
Erl@]P4
private int size=0; or`"{wop
@[(%b{TE;
private int[] queue; :Ea]baM"
{-IRX)m*
public int get() { YkV-]%c
return queue[1]; k/xNqN(
} (w'k\y
zHj_q%A
public void remove() { `O=LQ m`
SortUtil.swap(queue,1,size--); 9/\=6vC|
fixDown(1); X<"#=u(
} g.EKdvY"%H
file://fixdown 1 pzd
private void fixDown(int k) { 9e1KH'
int j; \AR3DDm
while ((j = k << 1) <= size) { 6dCqS
if (j < size %26amp;%26amp; queue[j] j++; 8j%lM/ v
if (queue[k]>queue[j]) file://不用交换 2wh{[Q2f
break; 5al44[
SortUtil.swap(queue,j,k); cW $~86u"C
k = j; 9;c]_zt
} -E!V;Tgc%U
} Kib?JRYt
private void fixUp(int k) { l\-(li H
while (k > 1) { fI(H :N
int j = k >> 1; i `8Y/$aT
if (queue[j]>queue[k]) A7:W0Gg
break; I."4u~[
SortUtil.swap(queue,j,k); ~R W6;
k = j; X"G3lG
} t#J #DyY5
} p&\x*~6u
[26([H
} 785Y*.p
2|^bDg;W+u
} HaamLu
65A>p:OO
SortUtil： e.g$|C^$m
z//6yr
package org.rut.util.algorithm; P(r}<SM
80M4~'3
import org.rut.util.algorithm.support.BubbleSort; `S7${0e
import org.rut.util.algorithm.support.HeapSort; ?+#E&F
import org.rut.util.algorithm.support.ImprovedMergeSort; ?3i-wpzMp
import org.rut.util.algorithm.support.ImprovedQuickSort; M*c`@\
import org.rut.util.algorithm.support.InsertSort; sXSZ#@u,WN
import org.rut.util.algorithm.support.MergeSort; pKSVT
import org.rut.util.algorithm.support.QuickSort; @{n2R3)k B
import org.rut.util.algorithm.support.SelectionSort; <BN)>NqM
import org.rut.util.algorithm.support.ShellSort; dTP$7nfe
*o[*,1Pw
/** L``K. DF
* @author treeroot p>p=nLK
* @since 2006-2-2 iyhB;s5Rgw
* @version 1.0 0)lG~_q
*/ !$5U\"M
public class SortUtil { Zt[1RMO
public final static int INSERT = 1; @le23+q
public final static int BUBBLE = 2; gasl%&
public final static int SELECTION = 3; "mE<r2=@
public final static int SHELL = 4; Wc_Ph40C<_
public final static int QUICK = 5; 8YBsYKC
public final static int IMPROVED_QUICK = 6; {/ _.]Vh
public final static int MERGE = 7; $NWI_F4
public final static int IMPROVED_MERGE = 8; r).S/
public final static int HEAP = 9; Fx0<!_tY-
!-4pr[C
public static void sort(int[] data) { C`x>)wm:
sort(data, IMPROVED_QUICK); 7b T5-=.
} $wVY)p9Q
private static String[] name={ c>3W1"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Wcn^IQ
}; D058=}^HE
.Isg1qrC
private static Sort[] impl=new Sort[]{ : C;=<$
new InsertSort(), ;xa]ke3]
new BubbleSort(), _B|g)Rdv
new SelectionSort(), #,qikKjt2
new ShellSort(), TO)wjF_
new QuickSort(), M|`%4vk>
new ImprovedQuickSort(), .|{*.YE
new MergeSort(), g;bkVq
new ImprovedMergeSort(), }qXi;u))
new HeapSort() *-Y|qS%
}; BZx#@356N
>UuLSF}
public static String toString(int algorithm){ $0K9OF9$
return name[algorithm-1]; ?P`]^#
} te'<xfG
d8 ve$X
public static void sort(int[] data, int algorithm) { @v2kAOw[
impl[algorithm-1].sort(data); n|L.dBAs]
} obX|8hTL%
_&JlE$ua7
public static interface Sort { G(4:yK0
public void sort(int[] data); G#CWl),=
} tL;;Yt
7IZ(3B<87t
public static void swap(int[] data, int i, int j) { q^dI!93n|
int temp = data; nS'0i&<{1
data = data[j]; w];t]q|
data[j] = temp; iygdX2
} 88)0Xi|]KP
} WohK,<Or