[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; u9^R ?y
} _.ELN/$-
int i1=l; }hX"A!0
int i2=mid+1; "Qxn}$6-
for(int cur=l;cur<=r;cur++){ sow/JLlbC
if(i1==mid+1) m[!AOln)
data[cur]=temp[i2++]; ||vQW\g
else if(i2>r) 6P:H`
data[cur]=temp[i1++]; (!&g (l;
else if(temp[i1] data[cur]=temp[i1++]; KqT~MPl
else S&m5]h!D
data[cur]=temp[i2++]; l5d> YTK+5
} !B\[Q$
} ^iwM(d]#5
$/uNV1]o
} DUK.-|a7
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改进后的归并排序: dj0`Q:VZ
sw@*N
package org.rut.util.algorithm.support; R(sa.Q\D4
.5m^)hi
import org.rut.util.algorithm.SortUtil; fMFlY%@t
\w=7L- 8
/** TAu*lL(F
* @author treeroot Y)L\*+ >"[
* @since 2006-2-2 <AB.`["
* @version 1.0 ,`JXBI~
*/ b!' bu
public class ImprovedMergeSort implements SortUtil.Sort { 6c>tA2G|8
WxS=Aip'
private static final int THRESHOLD = 10; 7#R& OQ
UVD::
/* d4P0f'.z
* (non-Javadoc) 8c'0"G@S
* %KmB>9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _(\\>'1q!
*/ ].2it{gF?b
public void sort(int[] data) { = *A_{u;E
int[] temp=new int[data.length]; rHtT>UE=
mergeSort(data,temp,0,data.length-1); C9}2F{8
} PHa#;6!5
V8xv@G{;
private void mergeSort(int[] data, int[] temp, int l, int r) { 1% )M-io
int i, j, k; /z4xq'<
int mid = (l + r) / 2; xIo7f
if (l == r) VrokEK*qbY
return; ;v6e2NacM'
if ((mid - l) >= THRESHOLD) Eu )7@
mergeSort(data, temp, l, mid); [vaG{4m
else `<>8tZS9"
insertSort(data, l, mid - l + 1); H\3CvFm
if ((r - mid) > THRESHOLD) m(3bO[u1
mergeSort(data, temp, mid + 1, r); 1Nk}W!v
else j1>77C3
insertSort(data, mid + 1, r - mid); =P+S]<O
FK#>E[[
for (i = l; i <= mid; i++) { lm&C!{K
temp = data; G<-)Kx
} K(plzQ3
for (j = 1; j <= r - mid; j++) { f41!+W=
temp[r - j + 1] = data[j + mid]; *0R=(Gy
} g-%uw[pf
int a = temp[l]; t MB;GIb#
int b = temp[r]; 8}Y( @ %4
for (i = l, j = r, k = l; k <= r; k++) { &T}v1c7)
if (a < b) { U<r<$K
data[k] = temp[i++]; &fj&UBA
a = temp; Y#6@0Nn[G
} else { ^D B0C
data[k] = temp[j--]; i*Y/q-N|
b = temp[j]; ZF;S}1
} \+MR`\|3
} yHt63z8'
} ,[bcyf
'EREut,>'
/** h3p 3~xq
* @param data "eQ96^'J
* @param l !*|CIxk(
* @param i y::;e#.
*/ ORx,n7-
private void insertSort(int[] data, int start, int len) { =QyO$:t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Sjr(e}*
} `bT{E.(T
} TL7-uH
} ^@)/VfVg
} VUF7-C*
)hQNIt3o_
堆排序： i%*x7zjY{
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package org.rut.util.algorithm.support; z4-AOTo2y
_ksp;kH?)
import org.rut.util.algorithm.SortUtil; v!F(DP.)Z
Ir\3c9
/** .<42-IEc
* @author treeroot p]+W1v}V!
* @since 2006-2-2 Y+?bo9CES!
* @version 1.0 RFK N,oB
*/ wOi>i`D&
public class HeapSort implements SortUtil.Sort{ :` ~b&Oz)
(rwbF
/* (non-Javadoc) %q*U[vv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T>uLqd{hH
*/ ?>o39|M_w
public void sort(int[] data) { e-}PJ%!,T
MaxHeap h=new MaxHeap(); FxZ\)Y
h.init(data); ',!#?aGV
for(int i=0;i h.remove(); 0KDDAkR5R
System.arraycopy(h.queue,1,data,0,data.length); @ ~sp:l
} I$mOy{/#
5e2mEQU>
private static class MaxHeap{ E?XA/z !
<m(nZ'Zqz2
void init(int[] data){ sG VC+!E
this.queue=new int[data.length+1]; 7>ODaj
for(int i=0;i queue[++size]=data; Pdn.c1[-a
fixUp(size); S,8zh/1y
} ev?>Nq+Z
} _>`0!mG
J5o"JRJ"
private int size=0; S$H4xkKs
XW#4C*5?d
private int[] queue; Zwt!nh
<K0lS;@K
public int get() { WWe.1A,
return queue[1]; c"z%AzUV'
} SUVr&S6Nk
]t=>#
public void remove() { cu"%>>,,
SortUtil.swap(queue,1,size--); =_1" d$S&
fixDown(1); QAJ>93
} A|&EI-In
file://fixdown 82=][9d #
private void fixDown(int k) { )3 r1; ^W
int j; WIGb7}egR
while ((j = k << 1) <= size) { qQ_B[?+W
if (j < size %26amp;%26amp; queue[j] j++; ]S[r$<r$
if (queue[k]>queue[j]) file://不用交换 z]WT>4
break; Ww p^dx`!
SortUtil.swap(queue,j,k); vLke,MKW
k = j; !^7:Rr_
} &qU[wn:1
} Rk=B;
private void fixUp(int k) { C[pDPx,#:G
while (k > 1) { H xlw1(zS
int j = k >> 1; QCo^#-
if (queue[j]>queue[k]) QXz!1o+"
break; lrE0)B5F
SortUtil.swap(queue,j,k); h>/ViB@"W|
k = j; yS43>UK_W+
} 8tL61x{]
} .3&m:P8zV
q-Qws0\v.
} 'SieZIm)
e>^R 8qM?
} (wfg84
ws=TR
SortUtil： EyeLC6u
qWFg~s#+
package org.rut.util.algorithm; M($},xAvDU
O,{ (
import org.rut.util.algorithm.support.BubbleSort; #J!? :(m:
import org.rut.util.algorithm.support.HeapSort; O>GP>U?]
import org.rut.util.algorithm.support.ImprovedMergeSort; Rv-o__C!
import org.rut.util.algorithm.support.ImprovedQuickSort; hF~B&^dd.
import org.rut.util.algorithm.support.InsertSort; f3>/6C
import org.rut.util.algorithm.support.MergeSort; ,2`d3u^CW
import org.rut.util.algorithm.support.QuickSort; {5udol5?
import org.rut.util.algorithm.support.SelectionSort; jveRiW@
import org.rut.util.algorithm.support.ShellSort; @\y7 9FX
P1QJ'eC;T
/** ie!4z34
* @author treeroot D:(f"
* @since 2006-2-2 >DRs(~|V#
* @version 1.0 vFOv IVp
*/ _D9=-^
public class SortUtil { Em,!=v(*
public final static int INSERT = 1; j r[~
public final static int BUBBLE = 2; .;2!c'mT9
public final static int SELECTION = 3; IT(c'}
public final static int SHELL = 4; M\&~Dmd
public final static int QUICK = 5; UjaC( c
public final static int IMPROVED_QUICK = 6; ~^S-
public final static int MERGE = 7; z aF0nov
public final static int IMPROVED_MERGE = 8; }WbN)
public final static int HEAP = 9; OK\%cq/U
co3 ,8\N0
public static void sort(int[] data) { )9r%% #
sort(data, IMPROVED_QUICK); $<4Ar*i
} DBUwf1=qj
private static String[] name={ |pqpF?h5|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J[H?nX9
}; r!^\Q7
F47n_JV!d
private static Sort[] impl=new Sort[]{ pL@zZK0
new InsertSort(), m_2P{
new BubbleSort(), !r*;R\!n2
new SelectionSort(), M9#QS`G
new ShellSort(), p|d9g ^
new QuickSort(), =!^iiHF
new ImprovedQuickSort(), @<G/H|f
new MergeSort(), (weokP!
new ImprovedMergeSort(), F9\Ot^~
new HeapSort() \z9?rvT:
}; X{}#hyYk"
4E>(Y98
public static String toString(int algorithm){ _,FoXf7
return name[algorithm-1]; ~8(X@~Tn*
} nY9qYFw
Nr9[Vz?$P
public static void sort(int[] data, int algorithm) { gKN_~{{OD
impl[algorithm-1].sort(data); \bic.0-
} Wp}9%Mq~Jy
\`&pk-uW
public static interface Sort { P(epG?Qg
public void sort(int[] data); _}@n_E
} ?(q*U!=
rx>Tc#g
public static void swap(int[] data, int i, int j) { 49oW 'j
int temp = data; 2^6TrZA7M6
data = data[j]; (QSWb>np
data[j] = temp; ?d<:V.1U@
} GB?#1|,
} \GvY`kt3