[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; u3vw[k
} mm`yu$9gbP
int i1=l; Hc-68]T
int i2=mid+1; RZ9chTX/
for(int cur=l;cur<=r;cur++){ \avgXndI
if(i1==mid+1) 8Dc'"3+6
data[cur]=temp[i2++]; -H](2}
else if(i2>r) FHyyZ{"
data[cur]=temp[i1++]; :W}M$5|
else if(temp[i1] data[cur]=temp[i1++]; X|pOw,"
else 3Yf!H-(\uB
data[cur]=temp[i2++]; S4>1d-
} 1NU@k6UHl
} }ILg_>uq[
$s9YU"
} "xMnD(p
,uhOf! |
改进后的归并排序: zqGo7;;#
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package org.rut.util.algorithm.support; UV)!zgP
w;DRC5V>
import org.rut.util.algorithm.SortUtil; }Lb[`H,}A
sG k'G573
/** uKpWb1(
* @author treeroot OR-fC
* @since 2006-2-2 /U,;]^
* @version 1.0 \QMRuR.
*/ mT#ebeBaf
public class ImprovedMergeSort implements SortUtil.Sort { >}!})]Xw9
D"GQlR
private static final int THRESHOLD = 10; ,wH]|`w
5wy3C
/* \9jvQV/y
* (non-Javadoc) uY$BZEuAZ
* t8z=R6zX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [f@[gE
*/ KFn[
public void sort(int[] data) { drf?7%v
int[] temp=new int[data.length]; Z/[ww8b.
mergeSort(data,temp,0,data.length-1); ~g|z7o
} \~@a/J
lX|d:HFtP
private void mergeSort(int[] data, int[] temp, int l, int r) { L[.RV*sL
int i, j, k; r2xIbZ
int mid = (l + r) / 2; m\ (crkN
if (l == r) #TKByOcD2!
return; i.6+CA
if ((mid - l) >= THRESHOLD) ~{gV`nm=J
mergeSort(data, temp, l, mid); ^Y+P(o$HM
else Kv>P+I'|r
insertSort(data, l, mid - l + 1); IO]%AL(.;
if ((r - mid) > THRESHOLD) +OX:T) 4h6
mergeSort(data, temp, mid + 1, r); z!:%Hbh=
else L{AfrgN
insertSort(data, mid + 1, r - mid); yM*f}S/ (
rIZ^ix-N
for (i = l; i <= mid; i++) { ).9m6.%Uk
temp = data; -jQMh
} 72{Ce7J4
for (j = 1; j <= r - mid; j++) { pv;ZR
temp[r - j + 1] = data[j + mid]; ^+'\ u;\
} B@v"giJgr
int a = temp[l]; ,5HC&@
int b = temp[r]; 1wM~),B8
for (i = l, j = r, k = l; k <= r; k++) { E)utrO R
if (a < b) { a+ lGN
data[k] = temp[i++]; _h8|shyP
a = temp; ]Geg;[t
} else { @Xj6h!"R
data[k] = temp[j--]; x72T5.
b = temp[j]; AvEd?
} 1o%E(*M4I
} uQ'Izdm
} )xj!7:n)
]pP:
/** UKBaGX:v
* @param data &5o ln@YL
* @param l LyA}Nd]pyq
* @param i o!>h Q#h
*/ ^ woCwW8n
private void insertSort(int[] data, int start, int len) { tunjV1 ,]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 86<[!ZM
} -"MB(`
} }0z]sYI
} t}q\.
} AI\|8[kf0
we;QrS(Hi
堆排序： :o+&>z
19.oW49Sw
package org.rut.util.algorithm.support; ;ro%Wjg`}
:FqHMN
import org.rut.util.algorithm.SortUtil; R8![ $mkU
Q/<?v!h{
/** XpU%09K
* @author treeroot q7ubRak
* @since 2006-2-2 oVYW'~OID
* @version 1.0 , UiA?7k
*/ #Z>EX?VS:
public class HeapSort implements SortUtil.Sort{ u[G`_Y{=EM
N#zh$0!8bJ
/* (non-Javadoc) TZYz`l+v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l0-zu6iw
*/ mel(C1b"j/
public void sort(int[] data) { C3>`e3v
MaxHeap h=new MaxHeap(); .P5OUK
h.init(data); a1yGgT a?D
for(int i=0;i h.remove(); }10ZPaHjl+
System.arraycopy(h.queue,1,data,0,data.length); 0$A7"^]
} %RX}sS
?'I pR
private static class MaxHeap{ n+9rx]W,
-K*&I!
void init(int[] data){ !au%D?w
this.queue=new int[data.length+1]; N497"H</
for(int i=0;i queue[++size]=data; 0; BX
fixUp(size); X[r\ Qa
} '|^<|S_+K
} nht?58
2~(\d\k
private int size=0; E[2>je
mO(A'p "b
private int[] queue; GB\1'
h#Q Sx@U6
public int get() { >hsvRX\_`
return queue[1]; yhJA{nL=
} QssU\@/Q
q6a7o=BP]
public void remove() { D +Ui1h-
SortUtil.swap(queue,1,size--); I' TprT
fixDown(1); asd3J
} Xah-*]ET
file://fixdown H". [&VP5Z
private void fixDown(int k) { gUtxyW
int j; L j>HZS$F
while ((j = k << 1) <= size) { O|I)HpG;
if (j < size %26amp;%26amp; queue[j] j++; E/IoYuB
if (queue[k]>queue[j]) file://不用交换 +xG
break; Kp)H>~cL
SortUtil.swap(queue,j,k); R-lpsvDDL2
k = j; uEX+j
} WO]9\"|y
} :7Jpt3
private void fixUp(int k) { D,sb{N
while (k > 1) { "nQ&~KQ
int j = k >> 1; 0P7sMCYu
if (queue[j]>queue[k]) -jdhdh
break; .Mb<.R3
SortUtil.swap(queue,j,k); |w3b!
k = j; 2SV}mK U
} ilr'<5rq
} QK0-jYG^
lZ>j:/R8^&
} ngI3.v/R
cypb6Q_
} ZW)_dg9
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SortUtil： vn5O8sD
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package org.rut.util.algorithm; _KZ&/
wJ Qm7n-+
import org.rut.util.algorithm.support.BubbleSort; ]**h`9MF
import org.rut.util.algorithm.support.HeapSort; yh:Wg$qx
import org.rut.util.algorithm.support.ImprovedMergeSort; SQ0?M\D7
import org.rut.util.algorithm.support.ImprovedQuickSort; vn(ji=
import org.rut.util.algorithm.support.InsertSort; }Md5a%s<
import org.rut.util.algorithm.support.MergeSort; fs,]%g^
import org.rut.util.algorithm.support.QuickSort; jhF&
import org.rut.util.algorithm.support.SelectionSort; X5w_ }Nhe
import org.rut.util.algorithm.support.ShellSort; PPMAj@B}V
Wkj0z]]?
/** x?rn<=
* @author treeroot 2.PZtl
* @since 2006-2-2 OLs<]0H
* @version 1.0 V(c>1xLlz
*/ =%Z5"];
public class SortUtil { A\:u5(
public final static int INSERT = 1; |zCT~#
public final static int BUBBLE = 2; 4157!w'\y
public final static int SELECTION = 3; U *K6FWqiB
public final static int SHELL = 4; 6i`Y]\X~#
public final static int QUICK = 5; >Sc/E}3
public final static int IMPROVED_QUICK = 6; "%E<%g
public final static int MERGE = 7; KbTd`AIL
public final static int IMPROVED_MERGE = 8; unD.t
public final static int HEAP = 9; |D1:~z
a4E{7c
public static void sort(int[] data) { ,d`6 {ll
sort(data, IMPROVED_QUICK); YHQvx_0yP
} tRu j}n+x
private static String[] name={ Uy98lv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @t{`KB+ ^
}; "OWW -m
-|g9__|@
private static Sort[] impl=new Sort[]{ e]DuV)k&
new InsertSort(), Bj*\)lG<
new BubbleSort(), qac8zt#2 C
new SelectionSort(), {v>8Kp7_R
new ShellSort(), GJTakhj3
new QuickSort(), `W9~u: F
new ImprovedQuickSort(), aGbHDo
new MergeSort(), !))!!{
new ImprovedMergeSort(), HnsPXF'8g
new HeapSort() K=N8O8R$y
}; %Kzu&*9Hb
Vf#g~IOI
public static String toString(int algorithm){ o*sss
return name[algorithm-1]; [!ilcHE)
} A~M.v0
F!7\Za,
public static void sort(int[] data, int algorithm) { J?"v;.K|hU
impl[algorithm-1].sort(data); X+[h]A
} ^d@ME<mb
ifI0s)Pn
public static interface Sort { FFq8LM8
public void sort(int[] data); SbXV'&M2AT
} Z_Y' 3'^Tw
51gSbkVX
public static void swap(int[] data, int i, int j) { 8T5W6Zs1
int temp = data; 76(/(v.x
data = data[j]; !x[].Urj
data[j] = temp; f<y-{.VnN$
} +F]=Z
} tUT:vK`