[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; 1o;*`
} F%}0q&
int i1=l; icX$<lD
int i2=mid+1; 0Q]p#;
for(int cur=l;cur<=r;cur++){ +h*.%P}o
if(i1==mid+1) NWGSUUa
data[cur]=temp[i2++]; zeXMi:X
else if(i2>r) Fe4QWB6\U
data[cur]=temp[i1++]; ${/"u3a_
else if(temp[i1] data[cur]=temp[i1++]; ddR_+B*H
else 4sVr]p`
data[cur]=temp[i2++]; m-~eCFc
} ,r,~1oV<"
} )>! IY Q
=uYz4IDB
} {GaQV-t
+Rtz`V1d
改进后的归并排序: f[@M
O$><E8q
package org.rut.util.algorithm.support; G]Jchg <
!`BK%m\8
import org.rut.util.algorithm.SortUtil; _t:l:x.;T
$ljgFmR_
/** u%^Lu.l_c
* @author treeroot T4W"!4[
* @since 2006-2-2 j15TavjGh
* @version 1.0 :Rs% (Z
*/ Kb_R "b3v
public class ImprovedMergeSort implements SortUtil.Sort { cU y,q]PO
=jik33QV<
private static final int THRESHOLD = 10; JlR'w]d M,
ez2 gy"
/* 62BJ;/ ]
* (non-Javadoc) oCLs"L-r{
* @-z#vJ5Qe{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c|N!ZYJI
*/ s*gyk
public void sort(int[] data) { u_aln[oIv
int[] temp=new int[data.length]; I#Q Tmg.
mergeSort(data,temp,0,data.length-1); Nk-biD/J
} xM1>kbo|
Z\=].[,w4
private void mergeSort(int[] data, int[] temp, int l, int r) { Nxu10
int i, j, k; 9o.WJ
int mid = (l + r) / 2; %6`{KT?
if (l == r) e75k-
return; 9Z0(e!b4S
if ((mid - l) >= THRESHOLD) \/jr0):
mergeSort(data, temp, l, mid); t)o #!)|
else x@+m_y
insertSort(data, l, mid - l + 1); u7u8cVF
if ((r - mid) > THRESHOLD) hFw\uETu
mergeSort(data, temp, mid + 1, r); R v9?<]
else XA~Rn>7&H
insertSort(data, mid + 1, r - mid); QdKxuG
&* 4uji
for (i = l; i <= mid; i++) { NyD[9R?
temp = data; ZdEeY|j
} LxkToO{
for (j = 1; j <= r - mid; j++) { %zHNX4
temp[r - j + 1] = data[j + mid]; h<.G^c)
} ,\;;1Kq
int a = temp[l]; 2}u hPW+
int b = temp[r]; +dm&XW >
for (i = l, j = r, k = l; k <= r; k++) { c'_-jdi`>_
if (a < b) { bz_Zk
data[k] = temp[i++]; |U?5% L
a = temp; l=5(5\
} else { :Ia3yi#
data[k] = temp[j--]; FxSBxz<N-A
b = temp[j]; ~V?O%1)k?\
} )2}{fFa%
} h0NM5
} "U34D1I)#
]Ff"o7gT
/** SMaC{RPQ
* @param data CjM+%l0MW
* @param l Qi|jL*mj&
* @param i Vg/{;uLAe
*/ s+>""yi
private void insertSort(int[] data, int start, int len) { cbl@V 1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y3$i?}?A
} 38!$9)
} @L^2VVWk^
} B:5(sK
} >2`)S{pBD
%y33evX/B
堆排序： i]*Wt8~!
cD^n}'ej
package org.rut.util.algorithm.support; xL4qt=
aksyr$d0V<
import org.rut.util.algorithm.SortUtil; oD_je~b)
au2ieZZ[
/** 9@Yk8
* @author treeroot _n_lO8mK
* @since 2006-2-2 >/1N#S#9
* @version 1.0 r_T\%
*/ d<. hkNN
public class HeapSort implements SortUtil.Sort{ `@ULG>
E\#hcvP
/* (non-Javadoc) KDgJ~T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aOfL;I
*/ D61CO-E(D
public void sort(int[] data) { OwV>`BIwns
MaxHeap h=new MaxHeap(); p*F&G=ZE
h.init(data); lDO9GNz$
for(int i=0;i h.remove(); q5?g/-_0[
System.arraycopy(h.queue,1,data,0,data.length); %d*k3f }
} 2hAu~#X
d7qY(!&
private static class MaxHeap{ ,rc5r3
WM NcPHcj
void init(int[] data){ Y8`4K*58%
this.queue=new int[data.length+1]; E~_2Jf\U
for(int i=0;i queue[++size]=data; 64>E|w
fixUp(size); jZS6f*$
} Ek(. ["
} _KC)f'Cx
5j1}?0v_
private int size=0; z:bxnM2\
EcrM`E#kaZ
private int[] queue; iU{bPyz,
&Qy_= -]
public int get() { 9r@r\-
return queue[1]; Q^/66"Z:Z
} q.FgX
{o< 4 ^
public void remove() { mZ3i#a4
SortUtil.swap(queue,1,size--); g<{/mxv/
fixDown(1); +Sv`23G@
} \ }>1$kH;
file://fixdown gBUtv|(@>[
private void fixDown(int k) { #K'3`dpL
int j; y562g`"U
while ((j = k << 1) <= size) { L)&?$V
if (j < size %26amp;%26amp; queue[j] j++; PmyS6a@
if (queue[k]>queue[j]) file://不用交换 &e@2zfl7
break; *5]fjh{
SortUtil.swap(queue,j,k); +Tc<|-qQn
k = j; 7lY&/-V
} HT)b3Ws~M8
} ;H/*%2
private void fixUp(int k) { 7g}4gX's
while (k > 1) { [tym~ZZ]_m
int j = k >> 1; &10vdAnBRC
if (queue[j]>queue[k]) X+;Ivx
break; %@3AA<
SortUtil.swap(queue,j,k); .9+"rK}u
k = j; Brr{iBz*"
} v>YdPQky
} GLQ1rT
"pdmz+k8S
} 1VL!0H
YlwCl4hq
} csz/[*
;0O3b
SortUtil： trnjOm
.pNWpWL.
package org.rut.util.algorithm; z kQV$n{
E ;65kZ
import org.rut.util.algorithm.support.BubbleSort; \k/ N/&;
import org.rut.util.algorithm.support.HeapSort; W_9-JM(r
import org.rut.util.algorithm.support.ImprovedMergeSort; 5p}Y6Lc\j
import org.rut.util.algorithm.support.ImprovedQuickSort; x$d3fsEE
import org.rut.util.algorithm.support.InsertSort; 1%Xwk2l,8b
import org.rut.util.algorithm.support.MergeSort; ,@jRe&6
import org.rut.util.algorithm.support.QuickSort; &$tBD@7
import org.rut.util.algorithm.support.SelectionSort; W76K/A<h>
import org.rut.util.algorithm.support.ShellSort; QCQku\GLV
'; ,DgR;'
/** _*h,,Q
* @author treeroot N ncur]
* @since 2006-2-2 0b+OB pqN
* @version 1.0 .^j#gE&B
*/ 1OK,r`
public class SortUtil { vJVL%,7
public final static int INSERT = 1; _"_ W KlN
public final static int BUBBLE = 2; 5n! V^ !
public final static int SELECTION = 3; #XR<}OYcL
public final static int SHELL = 4; CwZ+Pn0
public final static int QUICK = 5; tp<uN~rTgh
public final static int IMPROVED_QUICK = 6; h 92\1,
public final static int MERGE = 7; u[9i>7}9
public final static int IMPROVED_MERGE = 8; [~9rp]<
public final static int HEAP = 9; {.pR$]6B"+
=G3O7\KmH
public static void sort(int[] data) { ?F]Yebp^
sort(data, IMPROVED_QUICK); &cztUM(
} 8Kt_irD
private static String[] name={ OY7\*wc:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {E1g+><
}; i*B@#;;F
*t J+!1
private static Sort[] impl=new Sort[]{ BTjfzfO"
new InsertSort(), </F@5*
new BubbleSort(), 6wC|/J^
new SelectionSort(), DqyJ]}|
new ShellSort(), Z3?,r[
new QuickSort(), E;$)Oz
new ImprovedQuickSort(), .r[b!o^VR
new MergeSort(), yzr>]"o
new ImprovedMergeSort(), }MAQhXI^O|
new HeapSort() |P7c {
}; s$`g%H>
JR{3n*
public static String toString(int algorithm){ Z*S 9pkWcF
return name[algorithm-1]; IB:eyq-+
} d2lOx|jt
N|hNh$J[
public static void sort(int[] data, int algorithm) { hgMh]4wN*
impl[algorithm-1].sort(data); N<o3pX2i]
} ofbNg_K>
j~,7JJ (y
public static interface Sort { wjh[}rTV*
public void sort(int[] data); 54~`8f
} hNBv|&D#
{wMw$Fvf
public static void swap(int[] data, int i, int j) { @s!9T
int temp = data; ,oT?-PC$z
data = data[j]; :[#HP66[O5
data[j] = temp; dz5a! e [
} w{?nX6a@p
} ((7~o?Vbg