[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; On.{!:"I/
} \fdv]f
int i1=l; 1D7`YKI9h
int i2=mid+1; 9};8?mucr
for(int cur=l;cur<=r;cur++){ (@VMH !3
if(i1==mid+1) Y%^w:|f^
data[cur]=temp[i2++]; MYvY]Jx3
else if(i2>r) RJ&RTo
data[cur]=temp[i1++]; EGS)b
else if(temp[i1] data[cur]=temp[i1++]; vWv"
else Bahm]2
data[cur]=temp[i2++]; Y('#jU
} hEH?[>9
} L}b.ulkMD
9T9!kb
} Vwf$JdK%&l
=v&hWjP
改进后的归并排序: uyWunpT
Pn1^NUMZJ
package org.rut.util.algorithm.support; 783,s_
o[w:1q7
import org.rut.util.algorithm.SortUtil; C2I_%nU Z1
I6av6t}
/** -3*]G^y2
* @author treeroot o#Dk& cH
* @since 2006-2-2 4.aZ#c91_
* @version 1.0 v{N`.~,^
*/ /-'}q=M
public class ImprovedMergeSort implements SortUtil.Sort { 3(N$nsi
4e7-0}0
private static final int THRESHOLD = 10; ;xj?z\=Pg
bsli0FJSh'
/* s!zx} 5
* (non-Javadoc) 7xlkZF
* AV]2euyn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8/#A!Ww]
*/ 3;9^
public void sort(int[] data) { gz9j&W.
int[] temp=new int[data.length]; f'RX6$}\1X
mergeSort(data,temp,0,data.length-1); iWkWR"ysy
} v;{#Q&(
Wvh#:Z
private void mergeSort(int[] data, int[] temp, int l, int r) { &Z@o Q
int i, j, k; khxnlry
int mid = (l + r) / 2; +Kc
if (l == r) <'Eme
return; V f&zL Sgr
if ((mid - l) >= THRESHOLD) H%tdhu\e
mergeSort(data, temp, l, mid); Z5n1@a__
else 9.-S(ZO
insertSort(data, l, mid - l + 1); 4pF*"B
if ((r - mid) > THRESHOLD) 1CZgb
mergeSort(data, temp, mid + 1, r); "&u@d~`-n
else F)QDJE0
insertSort(data, mid + 1, r - mid); tDcT%D {:
lUZ+YD4
for (i = l; i <= mid; i++) { (?c"$|^J
temp = data; K\r8g=U
} UI0VtR]
for (j = 1; j <= r - mid; j++) { (w3YvG.
temp[r - j + 1] = data[j + mid]; 6nvz8f3*r]
} ouQ T
int a = temp[l]; 03Ycf'W
int b = temp[r]; f$$/H>MJ
for (i = l, j = r, k = l; k <= r; k++) { g!|kp?
if (a < b) { XpHrt XD
data[k] = temp[i++]; rb.N~
a = temp; \R_C&=
} else { n7[V&`e_
data[k] = temp[j--]; ZY+qA
b = temp[j]; *g2x%aZWbG
} I\ob7X'Xu!
} R-$!9mnr
} u*`GiZAO
)ez9"# MH'
/** |Rk@hzM2S
* @param data h2R::/2.
* @param l 8l`*]1.W<
* @param i f+!(k)GWd
*/ wmLs/:~
private void insertSort(int[] data, int start, int len) { q_58;Bv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4tBYR9|
} `|q(h Ow2
} W'TZ%K) I
} ?e 4/p
} eSq.GtI
4V`G,W4^J
堆排序： a:w#s}bL
(GfZ*
package org.rut.util.algorithm.support; '`Hr}
Q~Wqy~tS
import org.rut.util.algorithm.SortUtil; #ABZ&Z
dy[X3jQB
/** nu%*'.
* @author treeroot ckCE1e>s
* @since 2006-2-2 s~X%Y<9l
* @version 1.0 K-Ef%a2#`
*/ S f# R0SA
public class HeapSort implements SortUtil.Sort{ @r1_U,0e
kAUymds;O
/* (non-Javadoc) sW\!hW1*x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CrTw@AW9)
*/ pQB."[n
public void sort(int[] data) { |[8Th4*n
MaxHeap h=new MaxHeap(); Ny/MJ#Lq
h.init(data); VIf.q)_k
for(int i=0;i h.remove(); #RLt^$!H
System.arraycopy(h.queue,1,data,0,data.length); N;%6:I./
} d<Tc7vg4|U
JucY[`|JV
private static class MaxHeap{ jPkn[W# 6
FS1z`wYP
void init(int[] data){ J'r^/
this.queue=new int[data.length+1]; ^-'fW7[m
for(int i=0;i queue[++size]=data; Tid aa
fixUp(size); u*9V&>o
} U6s[`H3I{
} veECfR;
9>#6*/Oa7
private int size=0; '|=;^Z7.K
A3*!"3nU
private int[] queue; 2X&qE}%k S
hi[pVk~B)
public int get() { d#wVLmKZ
return queue[1]; xgtR6E^k
} ?aMOZn?
;dhQN}7
public void remove() { hE-M$LmN@
SortUtil.swap(queue,1,size--); zbPqYhJzA
fixDown(1); \l3h0R
} -s/ea~=R
file://fixdown > Nr#O
private void fixDown(int k) { kcxAd
int j; >(RkZ}z
while ((j = k << 1) <= size) { RG`1en
if (j < size %26amp;%26amp; queue[j] j++; xkAK!uVy
if (queue[k]>queue[j]) file://不用交换 |Q>IrT
break; 3;Fhg!ZO
SortUtil.swap(queue,j,k); E_LN]v
k = j; TS5Q1+hWHV
} #$y?v%^
} rrv%~giU
private void fixUp(int k) { WX0tgXl
while (k > 1) { xId.GWY1
int j = k >> 1; fikkY=
if (queue[j]>queue[k]) as=LIw}Q4
break; 1-QS~)+
SortUtil.swap(queue,j,k); WuW^GC{7
k = j; ;A!BVq
} @s^-.z
} 8dyg1F
@\I#^X5lv
} mj@13$=
VLN_w$iEq
} `y* }lg T
>lM l
SortUtil： 29q _BR *:
1ZRT:N<-
package org.rut.util.algorithm; C"enpc_C/
O|UC ?]6
import org.rut.util.algorithm.support.BubbleSort; kO-(~];
import org.rut.util.algorithm.support.HeapSort; WOf 4o
import org.rut.util.algorithm.support.ImprovedMergeSort; Xb,3Dvf
import org.rut.util.algorithm.support.ImprovedQuickSort; 61 ~upQaR
import org.rut.util.algorithm.support.InsertSort; {kAc(
import org.rut.util.algorithm.support.MergeSort; 2)~> R
import org.rut.util.algorithm.support.QuickSort; 5rUdv}.
import org.rut.util.algorithm.support.SelectionSort; =E{`^IT'R
import org.rut.util.algorithm.support.ShellSort; T9q-,w/j;
ua `RJ
/** #LN`X8Wz'
* @author treeroot & "B=/-(
* @since 2006-2-2 HE_8(Ms;8
* @version 1.0 .XhrCiZ
*/ G9vpt M
public class SortUtil { ]jRfH(i
public final static int INSERT = 1; Q)z8PQl O
public final static int BUBBLE = 2; uA#;G/$
public final static int SELECTION = 3; RY*U"G0#w
public final static int SHELL = 4; $xdy&
public final static int QUICK = 5; ,3 u}x,
public final static int IMPROVED_QUICK = 6; ?@ $r
public final static int MERGE = 7; y$R_.KbO
public final static int IMPROVED_MERGE = 8; ;P&OX5~V
public final static int HEAP = 9; w.-!UD9/.x
7 x?<*T
public static void sort(int[] data) { 9k[9P;"F:
sort(data, IMPROVED_QUICK); "8zDbdK
} ?#Q #u|~
private static String[] name={ ib791
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -+-_I*(
}; SOvF[,+
Lbb0_-']
private static Sort[] impl=new Sort[]{ Ef13Q]9|
new InsertSort(), Hg (Gl
new BubbleSort(), -1ub^feJ,
new SelectionSort(), |)/aGZ+
new ShellSort(), KdbHyg<4
new QuickSort(), t#eTV@-
new ImprovedQuickSort(), 6Sn.I1Wy
new MergeSort(), G'aDb/
new ImprovedMergeSort(), Tc3yS(aq
new HeapSort() )IZ~G\Ra'
}; 0NX,QD
5rZ
public static String toString(int algorithm){ 4x[S\,20
return name[algorithm-1]; ~gRf:VXX=_
} x`)&J B
@bP)406p
public static void sort(int[] data, int algorithm) { KL Xq\{X
impl[algorithm-1].sort(data); cq4Ipe
} 0>Z_*U~6
{h`uV/5@`
public static interface Sort { 2*#|Nj=^
public void sort(int[] data); HT1!5
} Qv/=&_6
]~hk6kS8Q
public static void swap(int[] data, int i, int j) { UByv?KZi
int temp = data; c=.(!qdH
data = data[j]; lQkQ9##*
data[j] = temp; SS.dY""89
} 'Ne@e)s9
} L8#5*8W6