[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; F0yh7MItV
} J2R<'(
int i1=l; QO,y/@Ph
int i2=mid+1; [sad}@R7
for(int cur=l;cur<=r;cur++){ 6xOR,p>E
if(i1==mid+1) `?$R_uFh:
data[cur]=temp[i2++]; U8c0C/
else if(i2>r) g5"g,SFGr
data[cur]=temp[i1++]; N8vWwN[3
else if(temp[i1] data[cur]=temp[i1++]; 5M(?_qj
else FxUH?%w
data[cur]=temp[i2++]; uaGg8
} Ff,M~zn
} %_u3Np
IFE C_F>
} v|"{x&I.
^NCH)zK]v
改进后的归并排序: `K@
S*]IR"YL
package org.rut.util.algorithm.support; <O*q;&9
QVP $e`4
import org.rut.util.algorithm.SortUtil; CeZ5Ti?F
<wuP*vI"h
/** z#\Z|OKU
* @author treeroot S38D cWIw
* @since 2006-2-2 +]__zm/^
* @version 1.0 %d>Ktf
*/ "au"\}
public class ImprovedMergeSort implements SortUtil.Sort { Qh*|mW
15zL,yo
private static final int THRESHOLD = 10; mrJQB I+
o1Xk\R{
/* m$o|s1t
* (non-Javadoc) "L,FUo^&
* cVz.ac
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $a-~ozr`C
*/ +-oXW>`&
public void sort(int[] data) { Mz06cw&
int[] temp=new int[data.length]; $+mmqc8
mergeSort(data,temp,0,data.length-1); ~E!"YkIr
} 1S=I(n?E
@wg*~"d
private void mergeSort(int[] data, int[] temp, int l, int r) { hcBfau;r
int i, j, k; 2"mO"2d%
int mid = (l + r) / 2; /0r2v/0
if (l == r) & =frt3
return; }ri"u;.R
if ((mid - l) >= THRESHOLD) W w8[d
mergeSort(data, temp, l, mid); J0>Q+Y
else XGUF9arN
insertSort(data, l, mid - l + 1); &&m%=i.qK
if ((r - mid) > THRESHOLD) KomF)KQ2r
mergeSort(data, temp, mid + 1, r); (YR] X_
else Mpj3<vj
insertSort(data, mid + 1, r - mid); X{ Nif G
sz)3 z
for (i = l; i <= mid; i++) { & IDF9B
temp = data; tf/ f-S
} KctD=6
for (j = 1; j <= r - mid; j++) { w@"|S_E
temp[r - j + 1] = data[j + mid]; :;JJvYIs
} [<%yUy
int a = temp[l]; weu'<C
int b = temp[r]; jf})"fz-*
for (i = l, j = r, k = l; k <= r; k++) { s=6w-'; V
if (a < b) { k}BNFv8
data[k] = temp[i++]; /fD)/x
a = temp; _2TIan}
} else { ;~@2YPj
data[k] = temp[j--]; 2L,e\]2Z
b = temp[j]; PGybX:L
} 6IvLr+I
} 7?A}qmv
} 3wr~P
NZD X93
/** _h.[I8xgYG
* @param data o30PI
* @param l v5*SoUOF
* @param i 1.';:/~(
*/ 51rM6 BT
private void insertSort(int[] data, int start, int len) { `*~:nvU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); doe[f_\
} ]=pEs6%O3
} 7lh%\
} 5%W3&F6%
} <H 3}N!
7{b|+0W
堆排序： +ivz
,{.&xJ$
package org.rut.util.algorithm.support; LN7;Yr
-m__I U
import org.rut.util.algorithm.SortUtil; G q:7d]c~T
)`U T#5
/** !E*-\}[
* @author treeroot Pajr`gU
* @since 2006-2-2 u]oS91
* @version 1.0 8..itty
*/ eDy}_By^
public class HeapSort implements SortUtil.Sort{ 9,9( mbWJv
21;n0E
/* (non-Javadoc) l,d8%\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZkK +?:9
*/ J"SAA0)@
public void sort(int[] data) { FS20OD
MaxHeap h=new MaxHeap(); M r@M~ -
h.init(data); #7g~Um%p
for(int i=0;i h.remove(); +C+3DwN
System.arraycopy(h.queue,1,data,0,data.length); "#p)Z{v"!
} iPs()IN.O
CE?R/uNo{
private static class MaxHeap{ *rqih_j0
)\s:.<?EQ
void init(int[] data){ 4[5Z>2w
this.queue=new int[data.length+1]; u2F 3>s
for(int i=0;i queue[++size]=data; #_H=pNWe
fixUp(size); FS']3uJ/
} Xe* L^8+
} "PuP J|
tw.%'oJ7
private int size=0; b^%4_[uRu
O[8Lp?
private int[] queue; yJgnw6>r2
v[~ U*#i
public int get() { wlkS+$<
return queue[1]; 1ra}^H}
} <x1(}x:u`
uT=sDWD:
public void remove() { &18} u~M
SortUtil.swap(queue,1,size--); PAqziq.
fixDown(1); Z&PwNr/
} 8IVKS>
file://fixdown O[-wm;_(=*
private void fixDown(int k) { /.}&yRR
int j; 5#iv[c
while ((j = k << 1) <= size) { VGe/;&1h
if (j < size %26amp;%26amp; queue[j] j++; wCkkfTO
if (queue[k]>queue[j]) file://不用交换 y_a~>S
break; kWr*+3Xq
SortUtil.swap(queue,j,k); n RXf\*"3
k = j; (3_2h4O
} *WOA",gZ
} :k JSu{p
private void fixUp(int k) { ofN|%g /
while (k > 1) { ##FN0|e&
int j = k >> 1; $3FFb#r
if (queue[j]>queue[k]) f)*}L?
break; *BSL=8G{
SortUtil.swap(queue,j,k); Kr8p:$D};
k = j; `< VoZ/v
} rj,Sk~0Q
} 8)sqj=
Yr[1-Oy/k
} <]"aP1+C
:egSW2"5S
} siOeR@>X
Q%@l`V)Rs
SortUtil： 8 v&5)0u
ZfMJU
package org.rut.util.algorithm; F[Peil+|`
fv)-o&Q#
import org.rut.util.algorithm.support.BubbleSort; ,A_itRHH
import org.rut.util.algorithm.support.HeapSort; v6iV#yz3(
import org.rut.util.algorithm.support.ImprovedMergeSort; Q:tW LVE#0
import org.rut.util.algorithm.support.ImprovedQuickSort; 6)Oe]{-
import org.rut.util.algorithm.support.InsertSort; sHAzg^n}r
import org.rut.util.algorithm.support.MergeSort; V_0e/7}Ya
import org.rut.util.algorithm.support.QuickSort; II),m8G
import org.rut.util.algorithm.support.SelectionSort; >6(nW:I0y
import org.rut.util.algorithm.support.ShellSort; +-xA/nU.c
1{"e'[L
/** /eZAAH
* @author treeroot gpO@xk$
* @since 2006-2-2 *}yW8i}36
* @version 1.0 e}7qZ^
*/ pcL02W|J
public class SortUtil { G!%1<SLi.
public final static int INSERT = 1; I'J=I{p*
public final static int BUBBLE = 2; "i9$w\lm
public final static int SELECTION = 3; #B>Hq~ vrC
public final static int SHELL = 4; /k7`TUK
public final static int QUICK = 5; NjL,0Bp
public final static int IMPROVED_QUICK = 6; 6nxf<1
public final static int MERGE = 7; y8 `H*s@
public final static int IMPROVED_MERGE = 8; *bwLih!}H
public final static int HEAP = 9; 3wa }p^
UPLr[>Q#
public static void sort(int[] data) { ,]Hn*\@p[c
sort(data, IMPROVED_QUICK); Jw9|I)H
} G+}|gG8
private static String[] name={ :0#!=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =q>eoXp
}; H.Pts>3r(
l6a,:*_
private static Sort[] impl=new Sort[]{ QNn$`Qz.
new InsertSort(), 3"&6rdF\jB
new BubbleSort(), `N2zeFG
new SelectionSort(), !MQo=k
new ShellSort(), Qp%kX@Z'
new QuickSort(), 5AQ $xm4
new ImprovedQuickSort(), 'J+Vw9s7
new MergeSort(), <A+Yo3|7
new ImprovedMergeSort(), 82>zu}
new HeapSort() 5Sk87o1E(d
}; F5&4x"c
5LXK#+Z
public static String toString(int algorithm){ O!uX:TE|Q
return name[algorithm-1]; N'|zPFkg
} /q(+r5k \
DKYrh-MN
public static void sort(int[] data, int algorithm) { Fb[<YX"
impl[algorithm-1].sort(data); F|Jo|02
} eEupqOF*:W
R6CxNPRJ
public static interface Sort { aRg- rz
public void sort(int[] data); 6-<,1Q'D
} yn4Xi@9Pri
wGAN"K:e
public static void swap(int[] data, int i, int j) { &!Y^DR/
int temp = data; ld`oIEj!P_
data = data[j]; Uu8Z2M
data[j] = temp; Cv~t~
} Ca]vK'(
} aCy2.Qn