[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; oe*&w9Y}&
} yki k4MeB
int i1=l; ^sOm7S{
int i2=mid+1; ~fF}
for(int cur=l;cur<=r;cur++){ \O8f~zA{G
if(i1==mid+1) mc+wRx
data[cur]=temp[i2++]; GufP[|7b-
else if(i2>r) R>U<8z"i
data[cur]=temp[i1++]; sKuTG93sr@
else if(temp[i1] data[cur]=temp[i1++]; 9v F2aLPk
else JAb?u.,Ns_
data[cur]=temp[i2++]; PM.SEzhm
} p<zXuocQ
} cGc|n3(
lp}WBd+
} SN{*:\>,
5An0DV5
改进后的归并排序: N Sh.g#
B R:
package org.rut.util.algorithm.support; r^E]GDz
4ufLP DH
import org.rut.util.algorithm.SortUtil; BXo|CITso
@Y<tH,*
/** uT/B}`md
* @author treeroot h*KHEg"+
* @since 2006-2-2 a-E-hX2
* @version 1.0 w~U`+2a3
*/ rc$!$~|I3Z
public class ImprovedMergeSort implements SortUtil.Sort { 6}T%m?/}
W|#ev*'F
private static final int THRESHOLD = 10; euhZ4+
cXY'>N
/* --twkD
* (non-Javadoc) ]pV1T
* =b!J)]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ww($0A`ek
*/ qZJ*J+
public void sort(int[] data) { ow_y
int[] temp=new int[data.length]; 6lWFxbh
mergeSort(data,temp,0,data.length-1); e^NEj1
} ;Zq~w
mrC+J*
private void mergeSort(int[] data, int[] temp, int l, int r) { @6co\.bv
int i, j, k; ]kkBgjQbS
int mid = (l + r) / 2; M6'C3,y0
if (l == r) yJ8}*Gj&
return; ING_:XpnJ
if ((mid - l) >= THRESHOLD) n]DNxC@b
mergeSort(data, temp, l, mid); P"x-7>c>Y
else }#G"!/ZA0:
insertSort(data, l, mid - l + 1); _Hu2[lV
if ((r - mid) > THRESHOLD) bjBeiKH
mergeSort(data, temp, mid + 1, r); )c*k_/4
else p,iCM?[|
insertSort(data, mid + 1, r - mid); q83~j`ZJ$
GD[ou.C}k
for (i = l; i <= mid; i++) { *sB-scD
temp = data; B^_Chj*m
} PGPbpl&\t
for (j = 1; j <= r - mid; j++) { I26gGp
temp[r - j + 1] = data[j + mid]; %Sn6*\z
} :pDY
int a = temp[l]; =/g$bZ
int b = temp[r]; Ydh<TF4!
for (i = l, j = r, k = l; k <= r; k++) { 9V;$v
if (a < b) { uUz`=4%A
data[k] = temp[i++]; ! F <] T
a = temp; @ 9 {%Kn
} else { 2d2@J{
data[k] = temp[j--]; [9O~$! <%
b = temp[j]; E,LYS"%_
} }utNZhJ
} V`\f+Uu
} `cP'~OT
hY}/Y
/** v0C;j(2zb
* @param data ?JgO-.
* @param l H_?B{We
* @param i hOB\n!
*/ eky(;%Sz
private void insertSort(int[] data, int start, int len) { r)p2'+}pV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .ts0LDk0f
} 4`6c28K0?
} N<06sRg#
} V(2,\+t
} Y#lk!#\Y
GwQZf|
堆排序： O<1vSav!K
~zxwg+:QO
package org.rut.util.algorithm.support; ``$%L=_m
/> 3
import org.rut.util.algorithm.SortUtil; KR=d"t Qw
2]D$|M?$~
/** /c@*eU
* @author treeroot >7nV$.5S
* @since 2006-2-2 5e)6ua,
* @version 1.0 *IWFeu7y
*/ r]8x;v1
public class HeapSort implements SortUtil.Sort{ VyWYfPK
ov`^o25f
/* (non-Javadoc) ?+n&hHRg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qByNHo7Tb
*/ i Y*o;z,~
public void sort(int[] data) { U|J$?aFDr
MaxHeap h=new MaxHeap(); 5fu+rU-#
h.init(data); ,\lYPx\P[
for(int i=0;i h.remove(); "Ap$Jl B
System.arraycopy(h.queue,1,data,0,data.length); 2f19W# '0
} Z'Exw-ca
ACigeK^C}E
private static class MaxHeap{ Q1`<fD
;%u_ ;,((
void init(int[] data){ StU 4{
this.queue=new int[data.length+1]; mDQEXMD
for(int i=0;i queue[++size]=data; rGnI(m.
fixUp(size); |rHG%VnBH
} u>}w-
} U g}8y8
!/Iq{2LX
private int size=0; 0]T.Lh$3
rQ~\~g[tP
private int[] queue; B;Xoa,
ItI0x
public int get() { +@emX$cFV
return queue[1]; v2hZq-q
} A*8m8Sh$
YDQ:eebg(
public void remove() { gA~20LSt
SortUtil.swap(queue,1,size--); K(nS$x1G
fixDown(1); C4QeDvpI
} DX}B0B
file://fixdown TGU:(J'^
private void fixDown(int k) { rv9B}%e
int j; #NvQmz?J?
while ((j = k << 1) <= size) { %G;0T;0L
if (j < size %26amp;%26amp; queue[j] j++; k"xGA*B|
if (queue[k]>queue[j]) file://不用交换 {=UFk-$=
break; h+,'B&=|_
SortUtil.swap(queue,j,k); 8Y2xW`
k = j; l0gY~T/#3
} qWsylC23
} >Z+"`"^o}
private void fixUp(int k) { m\>|C1oRy
while (k > 1) { q0,kDM66
int j = k >> 1; O: ,$%
if (queue[j]>queue[k]) }]AT _bh,
break; @j O4EEe:
SortUtil.swap(queue,j,k); q7X}MAW
k = j; r&}(9Cq&"y
} U1ZIuDg'E
} KH7VR^;mk
j-7u>s-l
} XJqTmj3
>+cSPN'i>
} .VT;H1#
;{vwBDV!'
SortUtil： lT8#bA
3&'2aW
package org.rut.util.algorithm; <W>++< -
*7ZGq(O
import org.rut.util.algorithm.support.BubbleSort; dj'm, k b
import org.rut.util.algorithm.support.HeapSort; ,7GWB:Sk
import org.rut.util.algorithm.support.ImprovedMergeSort; gtiEhCF2W
import org.rut.util.algorithm.support.ImprovedQuickSort; ^ eQFg>
import org.rut.util.algorithm.support.InsertSort; f-;$0mTQ
import org.rut.util.algorithm.support.MergeSort; 0n Y6A~
import org.rut.util.algorithm.support.QuickSort; {esJ=FV\
import org.rut.util.algorithm.support.SelectionSort; U{6oLqwq3Y
import org.rut.util.algorithm.support.ShellSort; HcRa`Sfc]/
]r4bRK[1
/** 7A5p["?Z
* @author treeroot U-i.(UyZ
* @since 2006-2-2 vT|`%~Be
* @version 1.0 HPrq1QpK
*/ q:I$EpKf?Q
public class SortUtil { j5Qo*p
public final static int INSERT = 1; ,`k_|//}=
public final static int BUBBLE = 2; K]c4"JJ
public final static int SELECTION = 3; kb71q:[
public final static int SHELL = 4; j^flwk
public final static int QUICK = 5; YEv%C|l
public final static int IMPROVED_QUICK = 6; <$%X<sDkq
public final static int MERGE = 7; -$(Jk<
public final static int IMPROVED_MERGE = 8; jMM$d,7B
public final static int HEAP = 9; r9# \13-
zN#*G i'
public static void sort(int[] data) { UXT p
sort(data, IMPROVED_QUICK); ~C-,G"zw&G
} )VSwTx&
private static String[] name={ +TK3{5`!Ae
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V A<5uk04K
}; FmEc`N9\v
}bH$O%
private static Sort[] impl=new Sort[]{ Q8T`wd$D#
new InsertSort(), 3iRA$C-p
new BubbleSort(), ]1D%zKY%$Z
new SelectionSort(), xg<Hxn,<M
new ShellSort(), 41G5!=i
new QuickSort(), `lO(s%HC
new ImprovedQuickSort(), *wuqa)q2
new MergeSort(), r> k-KdS
new ImprovedMergeSort(), "g>.{E5
new HeapSort() )"Q*G/+2Ie
}; $Az^Y0[D
'fx UV<K&
public static String toString(int algorithm){ 9i5tVOhE
return name[algorithm-1]; K{@3\5<
} <[Q3rJ
*)<B0SjT
public static void sort(int[] data, int algorithm) { <F;v`h|+S
impl[algorithm-1].sort(data); OoBCY-gj*
} ?-MP_9!JK
*4S-z&,.c
public static interface Sort { qnM|w~G
public void sort(int[] data); :`\) P,
} J NVr
lhH`dG D
public static void swap(int[] data, int i, int j) { ]0c+/ \b&
int temp = data; |F[=b'?
data = data[j]; \(~wZd
data[j] = temp; !ErH~<f%K
} .B72C[' c
} hB9Ee@