[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; eThaH0
} $eYL|?P50h
int i1=l; KC6Cg?y^
int i2=mid+1; 1 ~zjsi
for(int cur=l;cur<=r;cur++){ lT|Gkm<G
if(i1==mid+1) ITn%
data[cur]=temp[i2++]; K oJ=0jM#
else if(i2>r) ec&/a2M
data[cur]=temp[i1++]; $a M5jH<
else if(temp[i1] data[cur]=temp[i1++]; f4"UI-8;n
else ]4l2jY
data[cur]=temp[i2++]; UTD_rQ
} <q'l7S
} {%R^8
*q=T1JY
} GJeG7xtJKl
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改进后的归并排序: I=y7$+7%
r/j:A#6M]o
package org.rut.util.algorithm.support; bv[#|^/
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import org.rut.util.algorithm.SortUtil; ?b;2PH"
$Nu{c;7"
/** }/cReX,so
* @author treeroot h'y%TOob
* @since 2006-2-2 X-c|jn7
* @version 1.0 w4U,7%V
*/ y{%0[x*N<m
public class ImprovedMergeSort implements SortUtil.Sort { s#9q3JV0
4S<M9A}
private static final int THRESHOLD = 10; 7~Y\qJ4b
MCKN.f%lP
/* g#J`7n
* (non-Javadoc) PI9,*rOy
* UMoj9/-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YB38K(
*/ TN(Vzs%
public void sort(int[] data) { $UR:j8C{p$
int[] temp=new int[data.length]; ^_WR) F'K
mergeSort(data,temp,0,data.length-1); LR97FG
} EeW ,-I
hd3
private void mergeSort(int[] data, int[] temp, int l, int r) { vK',!1]y
int i, j, k; H;/do-W[
int mid = (l + r) / 2; Mog>W&U
if (l == r) [,o:nry'a
return; ,Z q:na
if ((mid - l) >= THRESHOLD) R}nvSerVb
mergeSort(data, temp, l, mid); 0*gvHVd/l
else r9[S%Def
insertSort(data, l, mid - l + 1); Z`Y&cKsn
if ((r - mid) > THRESHOLD) ,md_eGF
mergeSort(data, temp, mid + 1, r); !HY^QK
else YuK+N
insertSort(data, mid + 1, r - mid); [G<ga80
yw^Pok5.
for (i = l; i <= mid; i++) { n1sYD6u<&
temp = data; 3l{V:x!9@
} ${f<}
for (j = 1; j <= r - mid; j++) { d^C@5Pd <
temp[r - j + 1] = data[j + mid]; [wGj?M}
} %K6veB{M
int a = temp[l]; c1#0o)q*7
int b = temp[r]; Xw?DN*`L
for (i = l, j = r, k = l; k <= r; k++) { &dyQ6i$],
if (a < b) { lLD#|T3
data[k] = temp[i++]; \V? .^/
a = temp; xl&@g)Jj
} else { EXDDUqZ5\
data[k] = temp[j--]; L&pR#
b = temp[j]; CX|W$b)%
} 1oQw)X
} /<rvaR
} {wqT$( (<
bb6x} jR
/** (GJtTp~2C4
* @param data _Mw3>GNl
* @param l D2$9$xeR
* @param i UB$}`39@
*/ j-<-!jTd
private void insertSort(int[] data, int start, int len) { O_FB^BB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Nk'<*;e
} 4MgN
} 5vx 4F f
} msl.{
} W A/dt2D|
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堆排序： ;uBGB h<
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package org.rut.util.algorithm.support; oD2:19M@p
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import org.rut.util.algorithm.SortUtil; 6}"%>9
)+_Vx}O:}
/** ?P kJG,~
* @author treeroot wC1pfXa
* @since 2006-2-2 _*mn4n=
* @version 1.0 P5Xp #pa
*/ $qNF /rF
public class HeapSort implements SortUtil.Sort{ IiPX`V>RC
[\8rh^LFi
/* (non-Javadoc) VGS%U8;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L!}!k N:?
*/ <ToS&
public void sort(int[] data) { B/agW
MaxHeap h=new MaxHeap(); 6.@.k
h.init(data); m{IlRf'
for(int i=0;i h.remove(); zMSwU]4I!
System.arraycopy(h.queue,1,data,0,data.length); R{g= N%O
} ;K<VT\
wm5&5F4:
private static class MaxHeap{ I}`pY3
)N.3Q1g-
void init(int[] data){ 0L}`fYf
this.queue=new int[data.length+1]; TU|#Pz7n-Z
for(int i=0;i queue[++size]=data; 2F4<3k!&
fixUp(size); f_c\uN@f
} o,7|=.-b
} T?8BAxC?K
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private int size=0; f"Sp.'@
0#V"
private int[] queue; be+-p
T`#nn|
public int get() { yYz{*hq
return queue[1]; |`T7}U
} -.D?Z8e
v=k+MvX
public void remove() { i}m'#b
SortUtil.swap(queue,1,size--); " MnWd BS
fixDown(1); Ed=/w6<
} +hRy{Ps/
file://fixdown ;\pr05
private void fixDown(int k) { 8m+~HSIR
int j; +SFFwjI
while ((j = k << 1) <= size) { F_@B ` ,
if (j < size %26amp;%26amp; queue[j] j++; e{x>u(
if (queue[k]>queue[j]) file://不用交换 b|i4me@
break; ~XR('}5D
SortUtil.swap(queue,j,k); |lNp0b
k = j; |4+'YgO
} Ag8/%a~(
} Xu-~j!
private void fixUp(int k) { 8m0*89HEu
while (k > 1) { j2G^sj"|
int j = k >> 1; ]]|#+$ ~
if (queue[j]>queue[k]) SdnnXEB7
break; )Jt. Z^J<
SortUtil.swap(queue,j,k); mm>l:M TF
k = j; GCl *x:
} Q>5f@aN
} AXbb-GK
tddwnpnSw
} Z_GGH2u
pA8bFtt
} CR [>5/:M
sc*R:"
SortUtil： rWr'+v?
h,\{s_b
package org.rut.util.algorithm; -r*|N.5c
[8'?G5/n
import org.rut.util.algorithm.support.BubbleSort; onuG
import org.rut.util.algorithm.support.HeapSort; d/ Lz"
import org.rut.util.algorithm.support.ImprovedMergeSort; 5(<O?#P
import org.rut.util.algorithm.support.ImprovedQuickSort; {IOc'W-C#2
import org.rut.util.algorithm.support.InsertSort; -nGcm"'6F
import org.rut.util.algorithm.support.MergeSort; =-^A;AO(
import org.rut.util.algorithm.support.QuickSort; > TYDkEs0
import org.rut.util.algorithm.support.SelectionSort; Noj*K6
import org.rut.util.algorithm.support.ShellSort; nmpc<&<<
7rD 8
/** #M!u';bZ
* @author treeroot z}-CU GS
* @since 2006-2-2 gdIk%m4
* @version 1.0 /Xi21W/
*/ 3P!OP{`
public class SortUtil { Bw;isMx7
public final static int INSERT = 1; 2S7BzZ/
public final static int BUBBLE = 2; x<I[?GT=
public final static int SELECTION = 3; 3$"V,_TBZ
public final static int SHELL = 4; G$,s.MSf
public final static int QUICK = 5; ZV{C9S&
public final static int IMPROVED_QUICK = 6; C]b:#S${
public final static int MERGE = 7; l2;$qNAo
public final static int IMPROVED_MERGE = 8; b@J"b(
public final static int HEAP = 9; ((gI OTV
T.cTL.}
public static void sort(int[] data) { )2c]Z|
sort(data, IMPROVED_QUICK); /)[-5n{
} Z"c-Ly{vEj
private static String[] name={ P[fy
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |mMsU,*gB
}; R+.4|1p
4L>8RiiQE;
private static Sort[] impl=new Sort[]{ }"+"nf5h
new InsertSort(), e/hCYoS1n
new BubbleSort(), yr'-;-u
new SelectionSort(), Xc[ym
new ShellSort(), IhzY7U)}T
new QuickSort(), ou0TKE9 _
new ImprovedQuickSort(), OcUj_Zd
new MergeSort(), T^!Q(`*
new ImprovedMergeSort(), SE*;6&yL
new HeapSort() cq>J]35
}; y)KIz
u.q3~~[=
public static String toString(int algorithm){ }h`z2%5o
return name[algorithm-1]; %3dc_YPS
} $-/-%=
c) Eu(j\#
public static void sort(int[] data, int algorithm) { 8(j]=n6r
impl[algorithm-1].sort(data); :.=:N%3[
} y9mV6.r
@~vg=(ic(
public static interface Sort { R:n|1]*f3X
public void sort(int[] data); yl?LXc[)
} Q=! lbW
> 3x^jh
public static void swap(int[] data, int i, int j) { $cn8]*Z=
int temp = data; d7BpmM
data = data[j]; O-[YU%K3?
data[j] = temp; F3V:B.C
} }c||$
} N5)H(<}