[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; p;g$D=2
} l9\ *G;
int i1=l; LG(bdj"NM
int i2=mid+1; ;8H m#p7,
for(int cur=l;cur<=r;cur++){ Tw=Jc 's
if(i1==mid+1) NeQ/#[~g
data[cur]=temp[i2++]; 0:Xvch0
else if(i2>r) >A#]60w.
data[cur]=temp[i1++]; @jX[Ho0W'
else if(temp[i1] data[cur]=temp[i1++]; !M6*A1g5
else S-GcH
data[cur]=temp[i2++]; &;|/I`+
} LJ9^:U
} XB zcbS+
(z#qkKL{^
} y^?7de}
,@Xl?
改进后的归并排序: p1q"[)WVn^
Bi9 S1p
package org.rut.util.algorithm.support; l@%MS\{
YRqIC -_
import org.rut.util.algorithm.SortUtil; uD_iyK0,
"1t%J7c_
/** m!V ?xGKJ
* @author treeroot d[J+):aW
* @since 2006-2-2 xM'bb5
* @version 1.0 -r7*C:E
*/ K}LmU{/t/
public class ImprovedMergeSort implements SortUtil.Sort { 7']n_-fu
8i;EpAwB
private static final int THRESHOLD = 10; j@ lHgis
q{ i9VJ]
/* 2Gd.B/L6
* (non-Javadoc) L TzD\C'
* oSq4g{xvMH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J4&d6[40
*/ . _Bejh
public void sort(int[] data) { *F[@lY\p
int[] temp=new int[data.length]; 1YL6:5n
mergeSort(data,temp,0,data.length-1); 8c3Qd
} QX-%<@
/I(IT=kp
private void mergeSort(int[] data, int[] temp, int l, int r) { Yj;KKgk
int i, j, k; UiO%y
int mid = (l + r) / 2; ],V_"\ATD
if (l == r) iv*`.9TK-
return; (R5n ND
if ((mid - l) >= THRESHOLD) Dk[m)]w\
mergeSort(data, temp, l, mid); 9!&fak_
else V i V3Y
insertSort(data, l, mid - l + 1); dI};l
if ((r - mid) > THRESHOLD) V.?N29CA|
mergeSort(data, temp, mid + 1, r); ~.;+uH<i
else YMb\v4
insertSort(data, mid + 1, r - mid); >)\x\e
m^I+>Bp/:
for (i = l; i <= mid; i++) { F%M4i`Vh
temp = data; `f?v_Ui-$
} 0]p! Bscaf
for (j = 1; j <= r - mid; j++) { 46OYOa
temp[r - j + 1] = data[j + mid]; I?r7dQEm
} r)E9]"TAB
int a = temp[l]; }86&? 0j.
int b = temp[r]; O/ Yz6VQ
for (i = l, j = r, k = l; k <= r; k++) { ^E{M[;sF3y
if (a < b) { bk^W]<:z`
data[k] = temp[i++]; LX;w~fRr.
a = temp; 5n{J}0C
} else { 3D|Y4OM
data[k] = temp[j--]; BWRAz*V
b = temp[j]; IYAvO%~
} lV924mh
} |,#DB
} _kGJqyYV
2^RWGCEv
/** Va"H.]
* @param data $De14
* @param l P&I%!'<
* @param i A@M%}h
*/ TkHyXOk"Ky
private void insertSort(int[] data, int start, int len) { _sLSl;/t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JWQd/
} OI/m_xx@j
} j=c=Pe"?u
} 7m='-_w)?w
} r?Q`b2Q
xgeDfpF'
堆排序： 4u0\|e@a
NEp )V'
package org.rut.util.algorithm.support; TNun)0p
l}w9c`f
import org.rut.util.algorithm.SortUtil; V}=%/OY?
*XN|ZGl/
/** [=/Yo1:v
* @author treeroot 9NzK1V0X
* @since 2006-2-2 ;6+e!h'1
* @version 1.0 6WI-ZEVp&
*/ P}kBqMM
public class HeapSort implements SortUtil.Sort{ 5@c/,6l
n@1;5)&k~
/* (non-Javadoc) #WE"nh9f|z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PH!^ww6
*/ 4sJM!9eb[
public void sort(int[] data) { -o: ifF|
MaxHeap h=new MaxHeap(); 'OEh'\d+x
h.init(data); i*ibx;s-
for(int i=0;i h.remove(); Z:_ wE62'
System.arraycopy(h.queue,1,data,0,data.length); JdYmUM|K/c
} dOG]Yjc
pX 4:WV
private static class MaxHeap{ uO]^vP]fT
7 k:w3M
void init(int[] data){ U-h'a: K
this.queue=new int[data.length+1]; |aWeo.;c
for(int i=0;i queue[++size]=data; KkD.n#A
fixUp(size); ^lw0} i
} 3jeB\
} Gz09#nFZk
KH=4A-e,0
private int size=0; hKx*V"7/#\
_.}1 Y,Q
private int[] queue; :2v^pg|
c qWX*&2_
public int get() { '>"riEk
return queue[1]; mHj3ItXUu
} 6(M^`&fl
;7/ ;4Z
public void remove() { 8,VX%CS#q
SortUtil.swap(queue,1,size--); xJcM1>cT>
fixDown(1); yiT)m]E d
} TK! D=M
file://fixdown 5Yxs_t4
private void fixDown(int k) { &PE/\_xD_
int j; NI<;Lm
while ((j = k << 1) <= size) { &<Iyb}tA?
if (j < size %26amp;%26amp; queue[j] j++; `qXCY^BH2
if (queue[k]>queue[j]) file://不用交换 E\$7tXQK6
break; ox|K2A
SortUtil.swap(queue,j,k); :NCY6? [Dz
k = j; s8O.yL
} (Ci{fY6`
} J`I^F:y*
private void fixUp(int k) { !PySYY
while (k > 1) { LvM;ZfAEv
int j = k >> 1; 0aWy!d
if (queue[j]>queue[k]) BI|BfO%F$j
break; 1K&_t
SortUtil.swap(queue,j,k); N'5AU (
k = j; nuvRjd^N
} j Z6]G{
} MJyz0.9c
{?+dVLa^;
} - WEEnwZ
Q`0k=<
} wO-](3A-8P
{p90
SortUtil： 7>@g)%",
H Z)an
package org.rut.util.algorithm; L!>EW0
HxE`"/~.7k
import org.rut.util.algorithm.support.BubbleSort; i!nPiac
import org.rut.util.algorithm.support.HeapSort; Le?yzf
import org.rut.util.algorithm.support.ImprovedMergeSort; SWq5=h
import org.rut.util.algorithm.support.ImprovedQuickSort; s.uw,x
import org.rut.util.algorithm.support.InsertSort; bdxmJ9a:R
import org.rut.util.algorithm.support.MergeSort; L/+KY_b:*
import org.rut.util.algorithm.support.QuickSort; s7 K](T4
import org.rut.util.algorithm.support.SelectionSort; q8=hUD%5C
import org.rut.util.algorithm.support.ShellSort; #Rw9Iy4
^.Xom~
/** PV(TDb:0
* @author treeroot q@+#CUa&n
* @since 2006-2-2 $~G=Hcl9
* @version 1.0 n[f<]4<
*/ IncHY?ud<
public class SortUtil { }#bX{?f
public final static int INSERT = 1; H)5V \
public final static int BUBBLE = 2; MJ%gF=$X
public final static int SELECTION = 3; {K,KIj"
public final static int SHELL = 4; P;8D|u^\*
public final static int QUICK = 5; wI{ED
public final static int IMPROVED_QUICK = 6; O_~vl m<#
public final static int MERGE = 7; C)H1<Br7
public final static int IMPROVED_MERGE = 8; +\D?H.P
public final static int HEAP = 9; "Vw;y+F}
WU:r:m+ >
public static void sort(int[] data) { VNggDKS~K
sort(data, IMPROVED_QUICK); :enmMB#%
} _?m%i]~o
private static String[] name={ 7[/1uI9U8K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7j//x Tr}a
}; -ge :y2R_w
xlHC?d0}
private static Sort[] impl=new Sort[]{ 3[T<pAZ
new InsertSort(), ?c7} v
new BubbleSort(), ^6?)EM#
new SelectionSort(), J|gRG0O9Ya
new ShellSort(), }$wWX}@
new QuickSort(), ==^9_a^
new ImprovedQuickSort(), +`p@md2L1
new MergeSort(), QKAt%"1&
new ImprovedMergeSort(), ?*K{1Ghf
new HeapSort() 4\rwJD<
}; M#'j7EMu
9~lC/I')t
public static String toString(int algorithm){ 2sXNVo8`w"
return name[algorithm-1]; uB*Y}"Fn
} ),%(A~\
-0G/a&ss
public static void sort(int[] data, int algorithm) { $KAOJc4<
impl[algorithm-1].sort(data); 0^G5 zQlj
} -V\$oVS0S
JsY|Fv
public static interface Sort { !o{>[
public void sort(int[] data); ]A]EED.ZH
} g/_j"Nn
] l@Mo7|w
public static void swap(int[] data, int i, int j) { kaUEv\T
int temp = data; &40# _>W7
data = data[j]; y$h.k"x`
data[j] = temp; #|ILeby
} R4x!b`:i
} !h[xeLlU