[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; 7a,/DI2o
} _(qU%B
int i1=l; ]vFtByqn
int i2=mid+1; \Ax[/J2aO
for(int cur=l;cur<=r;cur++){ mbij& 0
if(i1==mid+1) U{8]TEv
data[cur]=temp[i2++]; ,#NH]T`c1
else if(i2>r) ~ AU!Gm.
data[cur]=temp[i1++]; o7qZy |\4S
else if(temp[i1] data[cur]=temp[i1++]; >=T\=y
else '@{'T LMCi
data[cur]=temp[i2++]; Ti{~
} uxxS."~
} 'S[&-D%(3
|#87|XIJ&~
} f vAF0 a
K&\3j-8^
改进后的归并排序: 'Q^P#<<
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package org.rut.util.algorithm.support; NoR=:Q 9e
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import org.rut.util.algorithm.SortUtil; 7QOQG:-
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/** ~> xVhd
* @author treeroot 2l8TX#K
* @since 2006-2-2 C6!P8qX
* @version 1.0 KMhEU**
*/ }Q=@$YIesD
public class ImprovedMergeSort implements SortUtil.Sort { zvDg1p
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private static final int THRESHOLD = 10; Sh]g]xR
cNd;qO0$
/* K;n5[o&c
* (non-Javadoc) >z,SN
* 6F@2:]W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *Dz<Pi^
*/ 'QMvj` -
public void sort(int[] data) { &3o[^_Ti
int[] temp=new int[data.length]; |x Nd^
mergeSort(data,temp,0,data.length-1); 7jf%-X
} [i ]
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private void mergeSort(int[] data, int[] temp, int l, int r) { f19~B[a
int i, j, k; ssWSY(j]
int mid = (l + r) / 2; x}c%8dO#J
if (l == r) RfZZqeU
return; ]Uy cT3A
if ((mid - l) >= THRESHOLD) kY$vPHZpN
mergeSort(data, temp, l, mid); B!z-O*fLE1
else )=PmHUd
insertSort(data, l, mid - l + 1); 5@:c6(5$
if ((r - mid) > THRESHOLD) {eQ')f
mergeSort(data, temp, mid + 1, r); -t5DcEAb$
else Mzbbr57n
insertSort(data, mid + 1, r - mid); B <CK~ybY
MV~-']2u
for (i = l; i <= mid; i++) { ^EG@tB $<
temp = data; 7p!w(N?s
} VkD8h+)
for (j = 1; j <= r - mid; j++) { C4`u3S
temp[r - j + 1] = data[j + mid]; gmU0/z3&
} Gp PlO]
int a = temp[l]; ]h`<E~
int b = temp[r]; xpzQ"'be
for (i = l, j = r, k = l; k <= r; k++) { Hy_}e"
if (a < b) { WN_i-A1G/h
data[k] = temp[i++]; J4xJGO
a = temp; uqN:I)>[P
} else { V&j |St[
data[k] = temp[j--]; /=|5YxY
b = temp[j]; nj@l5[
} +dt b~M
} On^jHqLaE
} .2si[:_(p
=Y0>b4
/** og! d
* @param data B F,rZZL
* @param l dp&bcR&#)
* @param i VgoN=S
*/ TsX(=N_
private void insertSort(int[] data, int start, int len) { 2u> [[U1:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R>3a?.X
} "]"!"#aMv
} i;yr=S,a0/
} "(U%Vg|)
} Gz>M`M`[4
]Q%|69H}B
堆排序： syseYt]
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package org.rut.util.algorithm.support; nCj_4,O
9aE.jpN
import org.rut.util.algorithm.SortUtil; T\Zq/Z\
bay7%[BLB
/** WC?}a^ 8
* @author treeroot )RQX1("O
* @since 2006-2-2 W/U_:^[-
* @version 1.0 <K#]1xCA
*/ [qMFLY$
public class HeapSort implements SortUtil.Sort{ :*{>=BD
K~?M?sa
/* (non-Javadoc) Tt0:rQ.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |&>!"27;w
*/ * MJl(
public void sort(int[] data) { @k~_ w#
MaxHeap h=new MaxHeap(); frYPC Irj
h.init(data); pxF<L\L?:
for(int i=0;i h.remove(); E8:4Z$|c
System.arraycopy(h.queue,1,data,0,data.length); *@C4~Zo
} ~[|zf*ZISG
jv"^_1
private static class MaxHeap{ V&' :S{i
=t+{)d.w
void init(int[] data){ SSS)bv8m
this.queue=new int[data.length+1]; ^aW?0qsH
for(int i=0;i queue[++size]=data; _>/T<Db
fixUp(size); .q>4?+
} ice7J2r_
} &|:T+LVv$+
P p}N-me>_
private int size=0; |?t6h 5Mt"
)"&$.bWn
private int[] queue; K-xmLEu
iz2I4 _N
public int get() { 0'DlsC/`*
return queue[1]; CQq'x+{F
} Tz=YSQy$9
4-?'gN_
public void remove() { A5lP%&tu(
SortUtil.swap(queue,1,size--); xTnd9'Pk`:
fixDown(1); `f@VX :aL}
} l*+"0
file://fixdown j'?^<4i
private void fixDown(int k) { +!(W>4F
int j; `%2e?"OOJ
while ((j = k << 1) <= size) { `VT0wAe2;
if (j < size %26amp;%26amp; queue[j] j++; !`BK%m\8
if (queue[k]>queue[j]) file://不用交换 ~N i#xa
break; >gt_C'
SortUtil.swap(queue,j,k); XZcT-w7
k = j; jJpSn[{
} r "^{?0
} %HRFH
private void fixUp(int k) { >PsP y.
while (k > 1) { 3wS{@'
int j = k >> 1; ! Z e
if (queue[j]>queue[k]) kXj%thDx
break; IZm_/
SortUtil.swap(queue,j,k); iwHy!Vi-5
k = j; s$ONht
} /12D >OK
} I6]|dA3G
[\hk_(}
} *>=vSRL0_
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} mErXdb|L
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SortUtil： ~urV`J
:'OCQ.[{s
package org.rut.util.algorithm; J,s)Fu\j@
=5P_xQx
import org.rut.util.algorithm.support.BubbleSort; 9`8\<a'rU
import org.rut.util.algorithm.support.HeapSort; +[ _)i9a
import org.rut.util.algorithm.support.ImprovedMergeSort; '~-Lxvf'
import org.rut.util.algorithm.support.ImprovedQuickSort; !;SpQ28
import org.rut.util.algorithm.support.InsertSort; WC!bB
import org.rut.util.algorithm.support.MergeSort; ~3{C&c
import org.rut.util.algorithm.support.QuickSort; \ B~9Ue!
import org.rut.util.algorithm.support.SelectionSort; CfMq?.4%E}
import org.rut.util.algorithm.support.ShellSort; &FWPb#
x8a?I T.
/** \WM*2&
* @author treeroot #5?Q{ORN o
* @since 2006-2-2 ;Yrg4/Ipa
* @version 1.0 Mk=;UBb$X
*/ L3Leb%,!
public class SortUtil { H=vrF-#
public final static int INSERT = 1; DPfP)J:~
public final static int BUBBLE = 2; nL}bCX{
public final static int SELECTION = 3; k'N `5M)
public final static int SHELL = 4; U!F~><
public final static int QUICK = 5; b$sw`Rsw
public final static int IMPROVED_QUICK = 6; \/jr0):
public final static int MERGE = 7; U.oxLbJ`
public final static int IMPROVED_MERGE = 8; Ejdw"P"
public final static int HEAP = 9; '3>kDH+
j+3~
public static void sort(int[] data) { ]JX0:'x^
sort(data, IMPROVED_QUICK); TEZ^Ia
} o~ .[sn5l-
private static String[] name={ W{Cc wq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QdKxuG
}; (o_fY.
%/dYSC
private static Sort[] impl=new Sort[]{ .>0e?A4,5?
new InsertSort(), "(}xIsy
new BubbleSort(), N\<RQtDg
new SelectionSort(), [y y D-
new ShellSort(), Vw*;xek?
new QuickSort(), XD`QU m
new ImprovedQuickSort(), 4BG6C'`%
new MergeSort(), Q? a&q0f
new ImprovedMergeSort(), :GC<U|p
new HeapSort() c=l 3Sz?
}; b 2n.v.$G
p\o=fcH%E
public static String toString(int algorithm){ +dm&XW >
return name[algorithm-1]; pmyHto"
} J/j1Yf'9
09"C&X~
public static void sort(int[] data, int algorithm) { wVBY^TE
impl[algorithm-1].sort(data); w>T1D
} ~R.8r-kD`
B&0^3iKFi
public static interface Sort { m?-3j65z
public void sort(int[] data); 05:`(vl
} A~Eu_m
p(MhDS\J
public static void swap(int[] data, int i, int j) { UYH;15s
int temp = data; 8NJ(l
data = data[j]; @<--5HbX
data[j] = temp; Nt#zr]Fz
} yy4QY%
} .+7GecYz