[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; qTrM*/m:]L
} }y1r yeW<
int i1=l; vA"LV+@
int i2=mid+1; HvR5-?qQ
for(int cur=l;cur<=r;cur++){ Or#KF6+ut
if(i1==mid+1) k4d;4D?
data[cur]=temp[i2++]; C{:U<q
else if(i2>r) 1Ep7CV-n}
data[cur]=temp[i1++]; W|Cs{rBc?
else if(temp[i1] data[cur]=temp[i1++]; -FF#+Z$
else "8p<NsU
data[cur]=temp[i2++]; bt*
} }uwZS=pw
} s)jNP\-
X?YT>+g;
} SdF+b+P]
)<%CI#s#
改进后的归并排序: JXV#V7
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package org.rut.util.algorithm.support; foUBMl
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import org.rut.util.algorithm.SortUtil; p"7]zq]'
t33\f<e
/** }vU^gPH
* @author treeroot *~~J1.ja>
* @since 2006-2-2 1,Es'
* @version 1.0 Y(] W+k<
*/ Q,M,^_
public class ImprovedMergeSort implements SortUtil.Sort { M6ZXq6J
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private static final int THRESHOLD = 10; ahdwoB
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/* ,k1ns?i9KH
* (non-Javadoc) )gz]F_
* 7xM4=\~OG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]*U+nG
*/ &1Y7Ne
public void sort(int[] data) { WZn"I&Z
int[] temp=new int[data.length]; f*:N*cC
mergeSort(data,temp,0,data.length-1); mE;^B%v
} h@]{j_$u
L8f_^ *,
private void mergeSort(int[] data, int[] temp, int l, int r) { fu{v(^
int i, j, k; v-8{mK`9\
int mid = (l + r) / 2; n^rbc;}
if (l == r) h+7U'+|%A
return; G0kF[8Am
if ((mid - l) >= THRESHOLD) P)LQ=b}V#;
mergeSort(data, temp, l, mid); R%~~'/2V
else me F.
insertSort(data, l, mid - l + 1); t\]kVo)
if ((r - mid) > THRESHOLD) ;dtA-EfOZ
mergeSort(data, temp, mid + 1, r); JvEW0-B^l,
else tKeozV[V
insertSort(data, mid + 1, r - mid); iaQfxQP1w%
xnJ#}-.7
for (i = l; i <= mid; i++) { 4]E1x l
temp = data; e\O625
} :?}>Q
for (j = 1; j <= r - mid; j++) { bMsThoePT
temp[r - j + 1] = data[j + mid]; xOr"3;^
} F&#I[]#
int a = temp[l]; *y(UI/c
int b = temp[r]; @\:@_}Z`_}
for (i = l, j = r, k = l; k <= r; k++) { cmYzS6f,7
if (a < b) { DZ $O%
data[k] = temp[i++]; "r8N- h/P
a = temp; _RS CyV
} else { fh66Gn,
data[k] = temp[j--]; KZ1m2R}'
b = temp[j]; RQu[FZT,
} t8;nP[`
} /1m+iM^V
} Z^Wv(:Nr
4N1)+W8k*
/** In;P33'p
* @param data L^PBcfg
* @param l |eFaOL|
* @param i c>T)Rc
*/ +bR|;b(v
private void insertSort(int[] data, int start, int len) { ^rO!-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]3Ibl^J
} )3V1aC
} @k#xr
} hSN38wy
} #;+SAoN
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堆排序： |+JC'b?,
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package org.rut.util.algorithm.support; ;#8xRLW
T.B7QAI. H
import org.rut.util.algorithm.SortUtil; |Ho} D~
R((KAl]dL
/** AM#s2.@
* @author treeroot glkH??S
* @since 2006-2-2 'F:Tv[qx
* @version 1.0 RMid}BRE
*/ e? |4O<@
public class HeapSort implements SortUtil.Sort{ rd24R-6
(h[. Ie
/* (non-Javadoc) eOfVBF<C2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T{N8 K K
*/ A!uiM*"W
public void sort(int[] data) { !kH 1|
MaxHeap h=new MaxHeap(); >7cDfv"
h.init(data); (.wR!l#!
for(int i=0;i h.remove(); l&mY}k
System.arraycopy(h.queue,1,data,0,data.length); 1CJAFi>%D
} dYlVJ_0Zr
; 3sjTqD
private static class MaxHeap{ RX^Xtc"
~LP5hL
void init(int[] data){ g&8-X?^Q
this.queue=new int[data.length+1]; PeLzZ'$D
for(int i=0;i queue[++size]=data; /#q6.du
fixUp(size); afu!.}4Ct
} Mp[2Auf
} 2p58_^l
qagR?)N)u
private int size=0; 6!;D],,"#.
HXPq+
private int[] queue; [8Z !dj
glBS|b$\:
public int get() { nV8iYBBym
return queue[1]; UgZL<}
} Q]$pg5O
SDk^fTV8x
public void remove() { ^f,%dM=i=
SortUtil.swap(queue,1,size--); ~]n=TEJ>
fixDown(1); .S* sGauM
} #)iPvV'
file://fixdown k[@/N+;")`
private void fixDown(int k) { eax"AmO
int j; FchO 6O
while ((j = k << 1) <= size) { 2R;#XmKS
if (j < size %26amp;%26amp; queue[j] j++; PSyUC#;
if (queue[k]>queue[j]) file://不用交换 VssWtL
break; k-)Ls~#+
SortUtil.swap(queue,j,k); ,3!4 D^
k = j; nUisC5HW
} %'S[f
} @3S:W2k
private void fixUp(int k) { #u +~ ^M
while (k > 1) { c: (nlYZ
int j = k >> 1; 3UUN@Tx
if (queue[j]>queue[k]) cIP%t pTW.
break; H?V b
SortUtil.swap(queue,j,k); \5Y<UJKi
k = j; wrsr U
} ${gO=Z
} 8NTE`l=>/
/w2-Pgm-[\
} U"~W3vwJ
*M$'dLn
} !fjB oK+
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SortUtil： a|4Q6Ycu
Dv&K3^~Rfb
package org.rut.util.algorithm; rZE+B25T~
)lq+Gv[%F
import org.rut.util.algorithm.support.BubbleSort; ~qK/w0=j
import org.rut.util.algorithm.support.HeapSort; Aq\K N.
import org.rut.util.algorithm.support.ImprovedMergeSort; RdNLf
import org.rut.util.algorithm.support.ImprovedQuickSort; KKWvV4u
import org.rut.util.algorithm.support.InsertSort; k|U2Mp
import org.rut.util.algorithm.support.MergeSort; ~@#a*="
import org.rut.util.algorithm.support.QuickSort; _rmKvSD%
import org.rut.util.algorithm.support.SelectionSort; !(Y,2{
import org.rut.util.algorithm.support.ShellSort; yT~x7,
e*U6^Xex
/** )V&hS5P=S
* @author treeroot |--Jd$ dj
* @since 2006-2-2 8;#yXlf
* @version 1.0 l[rK)PM
*/ qB&Je$_uh
public class SortUtil { sV\K[4HG
public final static int INSERT = 1; vTTXeS-b
public final static int BUBBLE = 2; |=MhI5gsx
public final static int SELECTION = 3; /'b7q y
public final static int SHELL = 4; 0N$FIw2
public final static int QUICK = 5; h_SkX@"/-
public final static int IMPROVED_QUICK = 6; ,]]*}4[r
public final static int MERGE = 7; \-f/\P/ w
public final static int IMPROVED_MERGE = 8; oYt34@{?
public final static int HEAP = 9; BRM!g9
\O\q1 s~
public static void sort(int[] data) { #<EYO
sort(data, IMPROVED_QUICK); ={+8jQqi1
} -3guuT3x\
private static String[] name={ HrfS^B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P{yb%@I~J
}; _l"nwEs
>k/cm3
private static Sort[] impl=new Sort[]{ 1X&jlD?
new InsertSort(), ;_2+Y^Qb
new BubbleSort(), K1Uq`TJ
new SelectionSort(), VxuV`Plf
new ShellSort(), .{} 8mFi1
new QuickSort(), !a-B=pn!]
new ImprovedQuickSort(), \4^rb?B
new MergeSort(), #<ST.f@*
new ImprovedMergeSort(), S(?A3 H
new HeapSort() Am_>x8z
}; w6WPfy(/2
'W yWO^Bdk
public static String toString(int algorithm){ /zoy,t-i
return name[algorithm-1]; qb/}&J7+
} ,&qC R sw
] _5b
public static void sort(int[] data, int algorithm) { f-71`Pyb
impl[algorithm-1].sort(data); 5j6`W?|q
} 2E[7RBFY+\
WmN( (
public static interface Sort { /XEW]/4
public void sort(int[] data); :dAd5v2f
} (Bd'Pj]:
nP]!{J]
public static void swap(int[] data, int i, int j) { \7"|'fz
int temp = data; CgrQ"N5
data = data[j]; _]pu"hZz4
data[j] = temp; qq]Iy=
} ~rJG4U
} ne/JC(