[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; o$qFa9|Ec?
} Yp?a=R
int i1=l; qqO10~Xc
int i2=mid+1; 8&`T<ECq>
for(int cur=l;cur<=r;cur++){ v]d?6g
if(i1==mid+1) I%VV4,I&pK
data[cur]=temp[i2++]; b{yH4)O
else if(i2>r) U3VsMV*Y
data[cur]=temp[i1++]; N?`GZ+5
else if(temp[i1] data[cur]=temp[i1++]; //4p1^%
else `"bRjC"f]
data[cur]=temp[i2++]; B4M'Er{v
} DI"dY ug#
} k^vmRe<lk
lzQ&)7`
} fR{WS:Pv
":ws~Zep
改进后的归并排序: =^".{h'-
^HU=E@
package org.rut.util.algorithm.support; m-pIFL<^N
g'l7Jr3
import org.rut.util.algorithm.SortUtil; Q%b46"
vp9E}ga
/** 'KW+Rr~tZn
* @author treeroot u.xA}yVS
* @since 2006-2-2 U%SNROj
* @version 1.0 O.m.]%URW
*/ k%bTs+]*
public class ImprovedMergeSort implements SortUtil.Sort { iaq:5||,
Ug[F3J|Mu
private static final int THRESHOLD = 10; p_kTLNZd9
9BgQoK@
/* rqG6Ll`=+
* (non-Javadoc) 7zOvoQ}
* dsft=t8s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =}1~~
*/ K`AW?p^$Y
public void sort(int[] data) { {3yws4
int[] temp=new int[data.length]; RWEgUDX^/
mergeSort(data,temp,0,data.length-1); lf7H8k,-
} rO2PbF3
h?O%XnD
private void mergeSort(int[] data, int[] temp, int l, int r) { }e;p8)]Wl
int i, j, k; nh_xbo5L[
int mid = (l + r) / 2; 70 DQ/b
if (l == r) j(2tbWg9-
return; oU{-B$w
if ((mid - l) >= THRESHOLD) 8i+jFSZ$
mergeSort(data, temp, l, mid); C^ k3*N
else v(WL 3[y;
insertSort(data, l, mid - l + 1); u>-uRz<)t
if ((r - mid) > THRESHOLD) +\]S<T*;
mergeSort(data, temp, mid + 1, r); )7BNzj"~
else i\c^h;wX
insertSort(data, mid + 1, r - mid); ]`+"o[
?2 O-EiWjZ
for (i = l; i <= mid; i++) { J5r L7
temp = data; #onfac-3
} Xwn|.
for (j = 1; j <= r - mid; j++) { N6 Cc%,
temp[r - j + 1] = data[j + mid]; m]b.P,~v
} jl|X$w
int a = temp[l]; i=+<7]Q
int b = temp[r]; 9=;g4I
for (i = l, j = r, k = l; k <= r; k++) { 9HBx[2&
if (a < b) { l'X?S(fiV
data[k] = temp[i++]; :r[-7 [/
a = temp; '"NdT7*+
} else { JZ*?1S>
data[k] = temp[j--]; ,@j&q
b = temp[j]; vskM;
} 1 bx^Pt)
} dXr !_)i
} $[9V'K
PfMOc+ q
/** Ay. q)
* @param data 1F%*k &R
* @param l 9hi(P*%q
* @param i b+fy&rk@-
*/ >Sl:Z ,g;
private void insertSort(int[] data, int start, int len) { Sv[_BP\^h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D_`)T;<Sp
} REe%>|
} @ F"ShT0
} (%^TTe
} !N2 n@bo
<Ucfd G&Lp
堆排序： (inwKRH
v6(l#,
package org.rut.util.algorithm.support; gl4 f9Ff
)e$-B]>7z
import org.rut.util.algorithm.SortUtil; ~<Qxw>S#
s#CEhb
/** !haXO
* @author treeroot 5|H(N}S_
* @since 2006-2-2 t@mw f3,
* @version 1.0 p~VW3u]
*/ Y@xeyMzE
public class HeapSort implements SortUtil.Sort{ e(5Px!B
*fyEw\`a
/* (non-Javadoc) gG|1$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v8M#%QoA
*/ 9!<3qx/
public void sort(int[] data) { oEf^o*5(
MaxHeap h=new MaxHeap(); <qZ+U4@I)
h.init(data); i]Of<eQ"
for(int i=0;i h.remove(); o%s}jBo}
System.arraycopy(h.queue,1,data,0,data.length); \{^yB4F_Z
} {}2p1-(
G~j<I/)"
private static class MaxHeap{ {dH<Un(4Z
Ny<G2!W
void init(int[] data){ 3S21DC@Y
this.queue=new int[data.length+1]; fu;B?mIn
for(int i=0;i queue[++size]=data; i2c<q0u
fixUp(size); mhSsOmJ5
} HBYpjxh
} Jm^jz
tAn6pGp
private int size=0; e;Z`&
=C}<0<"iF
private int[] queue; @_Oe`j^
-w0>4JDs
public int get() { 55en D
return queue[1]; <08V-
} t9l7 % +y
y=`(`|YW}`
public void remove() { nAj2k
SortUtil.swap(queue,1,size--); Rb*\A7o|;
fixDown(1); cW%O-
} I(S6DkU
file://fixdown 6S&YL
private void fixDown(int k) { %05a>Rf&
int j; pdu
while ((j = k << 1) <= size) { oa7Hx<Y
if (j < size %26amp;%26amp; queue[j] j++; e@By@r&nql
if (queue[k]>queue[j]) file://不用交换 bS6Yi)p
break; 5Yr$dNe
SortUtil.swap(queue,j,k); ?^Ux+mVE
k = j; <rF
} #+\G- =-
} WGK::?
private void fixUp(int k) { '& :"/4@)
while (k > 1) { iHB)wC`u
int j = k >> 1; /L^dHI]Q
if (queue[j]>queue[k]) |SleSgS<#
break; dG+xr!
SortUtil.swap(queue,j,k); q"oNB-bz
k = j; TQH#sx
} ]42l:at
} s,x]zG"
@xEQ<g
} `Mg "!n`
hrF4 a$
} E .5xzY
K(2s%
SortUtil： j C?
N5DS-gv
package org.rut.util.algorithm; " cg>g/
KMcP!N.I
import org.rut.util.algorithm.support.BubbleSort; d\M !o*U
import org.rut.util.algorithm.support.HeapSort; ;q2T*4NN
import org.rut.util.algorithm.support.ImprovedMergeSort; [G*mQ@G9
import org.rut.util.algorithm.support.ImprovedQuickSort; w0iEx1i
import org.rut.util.algorithm.support.InsertSort; 75f.^4/%
import org.rut.util.algorithm.support.MergeSort; =B1!em|
import org.rut.util.algorithm.support.QuickSort; 4y]*"(sQ;
import org.rut.util.algorithm.support.SelectionSort; b8&9pLl
import org.rut.util.algorithm.support.ShellSort; ;f Gi5=-
Hw? J1#1IE
/** 5Mr:(|JyV
* @author treeroot q`hg@uwA{`
* @since 2006-2-2 ^E^:=Q?'_
* @version 1.0 G)Y!aX
*/ Nsq%b?#
public class SortUtil { &n|gPp77$
public final static int INSERT = 1; n^K]R}S
public final static int BUBBLE = 2; trLs4o,
public final static int SELECTION = 3; gK /K Z8
public final static int SHELL = 4; XJ"9D#"a>
public final static int QUICK = 5; aH_&=/-Tz
public final static int IMPROVED_QUICK = 6; 0U'r ia:$
public final static int MERGE = 7; y06 2/$*$
public final static int IMPROVED_MERGE = 8; b~}}{fm&f
public final static int HEAP = 9; 2k_Bo~.
DWAU8>c+
public static void sort(int[] data) { SDkN
sort(data, IMPROVED_QUICK); '5%DKz
} ?k#%AM
private static String[] name={ n2E2V<#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MEu-lM7v
}; 4?Io@[7A)
e042`&9=Ic
private static Sort[] impl=new Sort[]{ 4[?Q*f!
new InsertSort(), bpkn[K"(
new BubbleSort(), x{rt\OT
new SelectionSort(), tc[PJH&P
new ShellSort(), rO NLbrj
new QuickSort(), 2}NfR8 N
new ImprovedQuickSort(), |l9AgwDg
new MergeSort(), HN:{rAIfc
new ImprovedMergeSort(), o}T]f(>}
new HeapSort() =Zj9F1E[i
}; -I -wdyDr
zVIzrz0
public static String toString(int algorithm){ C oaqi`v4T
return name[algorithm-1]; 8)i\d`
} eu#||
H Q2-20
public static void sort(int[] data, int algorithm) { Ct B> s7
impl[algorithm-1].sort(data); W?@ ;(k
} E(TY%wO
w(vf>L6(
public static interface Sort { VR'w$mp
public void sort(int[] data); <Sz9: hg-
} toF@@%
B$\5=[U
public static void swap(int[] data, int i, int j) { -/h$Yb
int temp = data; 9qw~]W~Nm
data = data[j]; 7B'0(70
data[j] = temp; ;G w5gK^
} NWKD:{
} C}M0KDF