[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; Z@$'fX?~9
} [a}Idi` K
int i1=l; 0tPwhJ
int i2=mid+1; a5d_= :S;
for(int cur=l;cur<=r;cur++){ 7 n^1H[q
if(i1==mid+1) S&k/Pc
data[cur]=temp[i2++]; 9}42s+
else if(i2>r) sqjDh
data[cur]=temp[i1++]; !1]jk(Z
else if(temp[i1] data[cur]=temp[i1++]; QA)"3g
else P=9UK`n
data[cur]=temp[i2++]; }g|9P SbJ
} Sco'] ^#(
} f9IqcCSW
J9y}rGO
} V%C'@m(/SZ
eu$"GbqY
改进后的归并排序: s.KfMJ"u[
#G?",,&dM
package org.rut.util.algorithm.support; wsc=6/#u
l <Z7bo
import org.rut.util.algorithm.SortUtil; 1-.i^Hal
AXnKhYlu
/** (OavgJ+Y
* @author treeroot D$w?
* @since 2006-2-2 -$@'@U
* @version 1.0 hQNUA|Q=%
*/ h7m$P^=U
public class ImprovedMergeSort implements SortUtil.Sort { &Wk:>9]Jrb
kKDf%=
private static final int THRESHOLD = 10; 9\kEyb$F=
04}c_XFFE
/* Y;dqrA>@
* (non-Javadoc) ]~ S zb
* nf:wJ-;*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rg]z
*/ !.4q{YWcYk
public void sort(int[] data) { J@IKXhb7_
int[] temp=new int[data.length]; *xKy^f
mergeSort(data,temp,0,data.length-1); R+/kx#^
} W*n|T{n
vAOThj)
private void mergeSort(int[] data, int[] temp, int l, int r) { ygK,t*T20
int i, j, k; W&3,XFnI_
int mid = (l + r) / 2; #H5+8W
if (l == r) 77]lpmC
return; fj9&J[
if ((mid - l) >= THRESHOLD) bz [?M}
mergeSort(data, temp, l, mid); 4CS$%Cu\?w
else 0fV}n:4Pq
insertSort(data, l, mid - l + 1); ?f!&M
if ((r - mid) > THRESHOLD) e. E$Ej]w
mergeSort(data, temp, mid + 1, r); zcio\P=^|B
else 3J3wKw!`
insertSort(data, mid + 1, r - mid); 5B3sRF}
:SZi4:4-J8
for (i = l; i <= mid; i++) { i.FdZN{
temp = data; xsvJjs;=
} V,?])=Ax
for (j = 1; j <= r - mid; j++) { DV*e.Y>
temp[r - j + 1] = data[j + mid]; J$`5KbT3
} F&lSRL+v
int a = temp[l]; SWT)M1O2
int b = temp[r]; b/E3Kse?
for (i = l, j = r, k = l; k <= r; k++) { *hpS/g/3\
if (a < b) { R(f%*S4
data[k] = temp[i++]; ndk~(ex|j
a = temp; wawJZ+V
} else { zIr-Rx'dL^
data[k] = temp[j--]; 5)->.*G*
b = temp[j]; X8~?uroq
} 3 [O+wVv
} f/m0,EERk
} uw@-.N^
fEGnI\
/** X'xnJtk
* @param data w.+G+r=
* @param l LF+E5{=:R
* @param i a?X@ D<.;
*/ v[jg|s&6"
private void insertSort(int[] data, int start, int len) { 3wPUP+)c7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >3I|5kZ6
} ^t`0ul]c
} y6H`FFqK
} {c<cSrfI
} @jZ1WHS_a
f'Oj01[
堆排序： 9j0o)]
<uo@k'
package org.rut.util.algorithm.support; /8"rCh|m-
}z2[w@M
import org.rut.util.algorithm.SortUtil; VLfKN)g
<EY{goW
/** AMK(-=
* @author treeroot D23 c/8K
* @since 2006-2-2 E[FE-{B#
* @version 1.0 KvO5-g
*/ zkd^5A; `
public class HeapSort implements SortUtil.Sort{ =yPV9#(I/
I`x[1%y2 F
/* (non-Javadoc) s+h}O}RV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q+O./1x*,
*/ J2$,'(!(
public void sort(int[] data) { 4lwoTGVZj
MaxHeap h=new MaxHeap(); 0Ld"df*
h.init(data); j&q%@%Gm
for(int i=0;i h.remove(); *0_Q0SeE,o
System.arraycopy(h.queue,1,data,0,data.length); (Dx p
} N7^sn!JB
'{)Jhl47
private static class MaxHeap{ y<l(F?_
cXb&Rm'L
void init(int[] data){ jZiz 0[
this.queue=new int[data.length+1]; L08lkq,
for(int i=0;i queue[++size]=data; w/9%C(w6
fixUp(size); K.b:ae^k
} j?\z5i""f
} hzA+,
<driD'=F
private int size=0; Tz&h[+6`
v]}\Ns/
private int[] queue; YhP+{Y8t
_ Ewkb
public int get() { &7r a
return queue[1]; b&9~F6aM
} StiWa<"c
1R7tnR@[u
public void remove() { xrv0%
SortUtil.swap(queue,1,size--); cNye@}$lu
fixDown(1); 1-|aeJ
} !x")uYf
file://fixdown v^Rw9*w{
private void fixDown(int k) { F(Je$c/J|~
int j; N686~
while ((j = k << 1) <= size) { 2AEVBkF;M
if (j < size %26amp;%26amp; queue[j] j++; ZzxWKIE'c
if (queue[k]>queue[j]) file://不用交换 eYevj[c;
break; YdN]Tqc
SortUtil.swap(queue,j,k); gJ^taUE
k = j; DHZ`y[&}|N
} SF da?>
} v4XEp
private void fixUp(int k) { ClNuO
while (k > 1) { QZuKM'D+
int j = k >> 1; h05<1>?|
if (queue[j]>queue[k]) 20I/En
break; [$#G|>x
SortUtil.swap(queue,j,k); u-QHV1H`(
k = j; 6MLjU1
} (k_9<Yb3
} kM(m$Oo.
)4>7X)j>
} 5=8t<v1Bn
7}`FXB
} ZH~Wn#Wp
DcE4r>8B
SortUtil： |7${E^u
#aiI]'
package org.rut.util.algorithm; &=XK:+
|/n
import org.rut.util.algorithm.support.BubbleSort; <,X=M6$0n
import org.rut.util.algorithm.support.HeapSort; }y vH)q
import org.rut.util.algorithm.support.ImprovedMergeSort; I+31:#d
import org.rut.util.algorithm.support.ImprovedQuickSort; 7m}fVLk
import org.rut.util.algorithm.support.InsertSort; }'K-1:
import org.rut.util.algorithm.support.MergeSort; ,sT5TS q
import org.rut.util.algorithm.support.QuickSort; Y~?Z'uR
import org.rut.util.algorithm.support.SelectionSort; Pz0TAb
import org.rut.util.algorithm.support.ShellSort; *]nk{jo2
`>OKV;~{z
/** A2$05a$%
* @author treeroot <j3|Mh_(I
* @since 2006-2-2 eHR]qy 0_X
* @version 1.0 hD4>mpk
*/ 0 ZSn r+
public class SortUtil { rinTB|5
public final static int INSERT = 1; WQbjq}RfI
public final static int BUBBLE = 2; C~C`K%7
public final static int SELECTION = 3; X,{[R |
public final static int SHELL = 4; Av4(=}M}@
public final static int QUICK = 5; ) $0>L5d:
public final static int IMPROVED_QUICK = 6; mu5r4W47
public final static int MERGE = 7; HJP~ lg
public final static int IMPROVED_MERGE = 8; WdB\n/BWB
public final static int HEAP = 9; Ey=}bBx
X~SNkM
public static void sort(int[] data) { JpxQS~VX
sort(data, IMPROVED_QUICK); GRaU]Z]ck
} g's!\kr
private static String[] name={ ~Yc!~Rz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D4uAwmc
}; V^rL
[B+:)i
private static Sort[] impl=new Sort[]{ c2?VjuB0
new InsertSort(), y~su1wUp
new BubbleSort(), G6+6uWvl
new SelectionSort(), \L`x![$~q
new ShellSort(), $\|Q+7lQ
new QuickSort(), ?[P>2oz
new ImprovedQuickSort(), oB~V~c}8x
new MergeSort(), X4Pm&ol
new ImprovedMergeSort(), lxr;AJ(
new HeapSort() j(k}NWPH
}; `r-3"or/$
$cU7)vmK`
public static String toString(int algorithm){ XVJH>Zw
return name[algorithm-1]; ]Qa|9G,b
} WW2hwB(
i0J`{PbI
public static void sort(int[] data, int algorithm) { %wI)uJ2
impl[algorithm-1].sort(data); ;8^(Z
} u?H.Z
U3`?Z`i(
public static interface Sort { Eggu-i(rD
public void sort(int[] data); Pn6~66a6
} "_&c[VptWi
@#$(Cs*{]
public static void swap(int[] data, int i, int j) { ),[@NK&=
int temp = data; Uw!d;YQm
data = data[j]; z(EpJK=`_
data[j] = temp; /7fd"U$Lh
} '@Yp@ _
} pOh<I{r1