[JAVA]用Java实现的各种排序

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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; 49!(Sa_]j
} i|!D
int i1=l; Wr6y w#
int i2=mid+1; yc7"tptfF
for(int cur=l;cur<=r;cur++){ INNTp[
if(i1==mid+1) bbG!Fg=qQ?
data[cur]=temp[i2++]; bMGU9~CeJ
else if(i2>r) 6[T)Q^0`
data[cur]=temp[i1++]; Ue&I]/?;$
else if(temp[i1] data[cur]=temp[i1++]; |Duf 3u
else EUmbNV0u
data[cur]=temp[i2++]; -~NjZ=vPh
} j V'~>
} SYYg 2I
WR zIK09@
} k=
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改进后的归并排序: ' JAcN@q~z
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package org.rut.util.algorithm.support; Uqd2{fji=#
~Q2,~9Dkc
import org.rut.util.algorithm.SortUtil; h[& \OD,P
L"It0C
/** [P3 Z"&
* @author treeroot V8947h|&
* @since 2006-2-2 ,e@707d`\
* @version 1.0 v$~ZT_"(9
*/ c:u2a/Q?
public class ImprovedMergeSort implements SortUtil.Sort { 1Q!^%{Y;
[pzo[0G 'v
private static final int THRESHOLD = 10; &`B Tw1u
7J|eL yj
/* 3e?a$~9
* (non-Javadoc) |>v8yS5
* seS)`@n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MT^krv(G
*/ ?'mi6jFFh
public void sort(int[] data) { }kF*I@:g
int[] temp=new int[data.length]; Y;1J`oT
mergeSort(data,temp,0,data.length-1); nV_[40KP_
} w=x [=O
D.,~I^W
private void mergeSort(int[] data, int[] temp, int l, int r) { 115zvW
int i, j, k; :^J'_
int mid = (l + r) / 2; l~#%j( Yo
if (l == r) '-[?iF@l
return; uuf+M-P
if ((mid - l) >= THRESHOLD) _xdFQ
mergeSort(data, temp, l, mid); dk.VH!uVb
else PbIir=
insertSort(data, l, mid - l + 1); KY9&Ky+2B
if ((r - mid) > THRESHOLD) s-e<&*D[
mergeSort(data, temp, mid + 1, r); VI;)VJbq
else EViDMp"
insertSort(data, mid + 1, r - mid); ]cP$aixd
G]E-2 _t7
for (i = l; i <= mid; i++) { 7NP Ny
temp = data; mApl}I
} q/dja
for (j = 1; j <= r - mid; j++) { BE,H`G #h
temp[r - j + 1] = data[j + mid]; Nrfj[I
} _<7e5VR
int a = temp[l]; ;#n+$Q#:
int b = temp[r]; KBa
for (i = l, j = r, k = l; k <= r; k++) { - %`iLu
if (a < b) { *:,y`!F=y
data[k] = temp[i++]; 8+8P{_
a = temp; D`@*udn=
} else { lk%W2N5
data[k] = temp[j--]; /F_(&H!m
b = temp[j]; 1J[|Ow
} TUO*w
} ]oE:p
} B+n(K+
:=2l1Y[-G
/** T]y^PT<8?
* @param data C^9bur/
* @param l la*c/*
* @param i (nt=
*/ !~a1xI~s
private void insertSort(int[] data, int start, int len) { )kt,E}609
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O;SD90
} iNEE2BPp
} MzCZj
} t_{rKb,
} A9C
#]e](j>]
堆排序： ;`}b .S=n
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package org.rut.util.algorithm.support; PP!}w
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import org.rut.util.algorithm.SortUtil; RtScv
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/** -: 8[
* @author treeroot YY9Ub
* @since 2006-2-2 I;3Uzv
* @version 1.0 [LrA_N
*/ L7 g4'
public class HeapSort implements SortUtil.Sort{ U=>4=gsG
WG(%Pkowv
/* (non-Javadoc) .h@HAnmE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;&U! g&
*/ 1`l10fqU
public void sort(int[] data) { QP1bm]QYA
MaxHeap h=new MaxHeap(); ~JSa]6:_+
h.init(data); 1xt N3{c
for(int i=0;i h.remove(); <|c[ #f
System.arraycopy(h.queue,1,data,0,data.length); bT#re
} X8| 0RU@f
:Tn1]a)f6
private static class MaxHeap{ @g==U{k;t
7 J+cs^2
void init(int[] data){ <s(<ax30
this.queue=new int[data.length+1]; ,]8$QFf
for(int i=0;i queue[++size]=data; Q(7M_2e7
fixUp(size); )Qixde>]p
} E|5lm
} drEND`,@6|
]Q*eCt;l"K
private int size=0; DTp|he
6n5>{X
private int[] queue; HA::(cXL
G,JK$j>*l
public int get() { 3m59EI-p
return queue[1]; Gw0MDV&[
} = *~Q5F
QP0[
public void remove() { n 2m!a0;
SortUtil.swap(queue,1,size--); {ZrB,yK
fixDown(1); aIW W[xZ
} v#o<. Ig
file://fixdown $H2HVJ
private void fixDown(int k) { (&ABfm/t
int j; d vTsbs/6
while ((j = k << 1) <= size) { P1Chmg
if (j < size %26amp;%26amp; queue[j] j++; xXm:S{I
if (queue[k]>queue[j]) file://不用交换 {ehAF=C
break; Ri&?uCCM
SortUtil.swap(queue,j,k); _$YT*o@0J
k = j; $jtXNE?
} [Csv/
} %9P)Okq
private void fixUp(int k) { 268H!'!\
while (k > 1) { 7d"gRM;
int j = k >> 1; >djTJ>dl_u
if (queue[j]>queue[k]) Rr3<ln
break; k| Ye[GM*
SortUtil.swap(queue,j,k); hY-;Vh0J
k = j; N>'|fNx]
} LAfv1
} KWB;*P C^
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} yqKERdm
*cnxp-)ub
} UJ8V%0
oiY&O]}
SortUtil： E^<.;
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package org.rut.util.algorithm; @Nk]f
#pm0T1+jW
import org.rut.util.algorithm.support.BubbleSort; FZW:dsm
import org.rut.util.algorithm.support.HeapSort; _ZD8/?2QV
import org.rut.util.algorithm.support.ImprovedMergeSort; T($6L7 j9
import org.rut.util.algorithm.support.ImprovedQuickSort; N&'05uWY}
import org.rut.util.algorithm.support.InsertSort; M,j3z#
import org.rut.util.algorithm.support.MergeSort; h,WF'X+
import org.rut.util.algorithm.support.QuickSort; }9,^=g-
import org.rut.util.algorithm.support.SelectionSort; `OWw<6`k
import org.rut.util.algorithm.support.ShellSort; U)g27*7
;mYj`/Yj
/** c _faW
* @author treeroot "Ooc;xD3<
* @since 2006-2-2 ;zc,vs
* @version 1.0 ON~K(O2g(
*/ l{b*YUsz>
public class SortUtil { :4, OA
public final static int INSERT = 1; DHnu F@M
public final static int BUBBLE = 2; _[_mmf1;:'
public final static int SELECTION = 3; @g~hYc
public final static int SHELL = 4; WnLMa|e
public final static int QUICK = 5; [~_()i=Y
public final static int IMPROVED_QUICK = 6; $pOgFA1'
public final static int MERGE = 7; DRUvQf
public final static int IMPROVED_MERGE = 8; Ar:ezA
public final static int HEAP = 9; 2UGnRZ8:1Y
-g;cg7O#(
public static void sort(int[] data) { Z(=UZI?
sort(data, IMPROVED_QUICK); t@1bu$y
} nC>'kgRt
private static String[] name={ #lHA<jI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L1i:hgq0]
}; _~_E(rTn
ejuw+@ _
private static Sort[] impl=new Sort[]{ Xzp!X({
new InsertSort(), $JTQA
new BubbleSort(), PfKF!/c B
new SelectionSort(), u:FFZ
new ShellSort(), ~-.^eT kP
new QuickSort(), +~~&FO2
new ImprovedQuickSort(), K V-}:u(
new MergeSort(), >TqMb8e_
new ImprovedMergeSort(), JO `KNI
new HeapSort() It .`
}; ;[~:Y[N
ZLRAiL
public static String toString(int algorithm){ Xob,jo}a
return name[algorithm-1]; Z[{k-_HgAm
} :J{| /"==
H^<LnYZ
public static void sort(int[] data, int algorithm) { 609_ZW;)
impl[algorithm-1].sort(data); 5lc%GJybV
} l5R0^!t
Bh\>2]~@a
public static interface Sort { ;HPQhN_
public void sort(int[] data); :jc ?T
} +9[/> JM
)GpH5N'EI
public static void swap(int[] data, int i, int j) { lwU$*?yv
int temp = data; xc HG5bg|
data = data[j]; ojA i2uz
data[j] = temp; pDg_^|
} GvCB3z
} ]U8VU