[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; cD@lorj
} pdqa)>$
int i1=l; _H<OfAO
int i2=mid+1; J$*["y`+
for(int cur=l;cur<=r;cur++){ }eFUw
if(i1==mid+1) ?o5#Ve$-X
data[cur]=temp[i2++]; *LdH/C.LIf
else if(i2>r) \#7%%>p=O'
data[cur]=temp[i1++]; pytfsVM
else if(temp[i1] data[cur]=temp[i1++]; TFNU+
else '^3pF2lIw
data[cur]=temp[i2++]; q ? TI,
} Jd6Q9~z#
} >Mw =}g@P
#f;1f8yrN
} > BCX%<&
Cy'W!qH
改进后的归并排序: [7w_.(f#
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package org.rut.util.algorithm.support; 0MGK3o)
[z@RgDXv
import org.rut.util.algorithm.SortUtil; *`'%tp"'+
,8?*U]}
/** IVODR
* @author treeroot Cs=i9.-A
* @since 2006-2-2 Qh%vh;|^
* @version 1.0 q[A3$y(
*/ Jn&>Z? @
public class ImprovedMergeSort implements SortUtil.Sort { 8>;o MM
Yx c >+mx
private static final int THRESHOLD = 10; "fd=(& M*l
^@"f%3
/* D ,^ U%<`
* (non-Javadoc) O'U,|A
* ys6"Q[B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iGNKf|8{
*/ 9gayu<J
public void sort(int[] data) { IFoN<<7/2$
int[] temp=new int[data.length]; oioN0EuDk
mergeSort(data,temp,0,data.length-1); 8k'em/M~
} v~QZO4['
wk/U"@lq
private void mergeSort(int[] data, int[] temp, int l, int r) { Q[tz)99~
int i, j, k; i.,B 0s]Z
int mid = (l + r) / 2; 0LuY"(LR
if (l == r) -z1o~~
return; V t;&2v
if ((mid - l) >= THRESHOLD) j'cCX[i
mergeSort(data, temp, l, mid); a :AcCd)
else -ouL4
insertSort(data, l, mid - l + 1); o%Q2.
if ((r - mid) > THRESHOLD) Ll48)P{+}V
mergeSort(data, temp, mid + 1, r); o7B+f
else c{(%+
insertSort(data, mid + 1, r - mid); rn*VL(Yd(
<WkLwP3^
for (i = l; i <= mid; i++) { 4yy yXj
temp = data; MRu+:Y=K
} S@-X?Lu
for (j = 1; j <= r - mid; j++) { YP97D n
temp[r - j + 1] = data[j + mid]; ]HT>-Ba;{h
} P^+>QJ1
int a = temp[l]; dU n#'<g5
int b = temp[r]; ( h,F{7
for (i = l, j = r, k = l; k <= r; k++) { @},k\Is
if (a < b) { #2,L)E\G8e
data[k] = temp[i++]; ;yrcH+I$_
a = temp; ]^%3Y
} else { NPabM(<`
data[k] = temp[j--]; X~!?t}
b = temp[j]; G&Sg.<hn
} !\v3bOi&
} =5F49
} c~;.m<yrf
\LXNdE2B
/** EJY:C9W
* @param data @Q5^Q'!
* @param l q\Z1-sl~s
* @param i i/B"d,=<
*/ EatDT*!
private void insertSort(int[] data, int start, int len) { vUA`V\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]z NL+]1_
} xSZw,
} kp"cHJNx
} -7Wmq[L/
} '.yr8
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堆排序： ypVr"fWB
e@YR/I8my
package org.rut.util.algorithm.support; dq&d>f1
aS2 Y6
import org.rut.util.algorithm.SortUtil; _: x$"i
e&nw&9vo
/** ),|bP`V
* @author treeroot _95tgJy
* @since 2006-2-2 ${3OQG
* @version 1.0 L.[2lQ
*/ VtFh1FDI\
public class HeapSort implements SortUtil.Sort{ r?*?iw2g
d~%Rnic6*
/* (non-Javadoc) bN)?szh&Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TA5M4r6
*/ G&-h,"yo^
public void sort(int[] data) { Stpho4+/y
MaxHeap h=new MaxHeap(); `dhK$jYD
h.init(data); c:5BQr '
for(int i=0;i h.remove(); ]T`qPIf;yJ
System.arraycopy(h.queue,1,data,0,data.length); ZO^+KE"
} /8R1$7
E u
private static class MaxHeap{ (reD
u:|5jF
void init(int[] data){ yE>DQ *
this.queue=new int[data.length+1]; G#>X~qk()
for(int i=0;i queue[++size]=data; hBw~l?G
fixUp(size); kPe9G
} ~XRr }z_Lq
} suwj1qYJ4
7[\B{N9&W
private int size=0; `{":*V
ufOaD7
private int[] queue; 8*ysuL#
xPv&(XZR
public int get() { nq;)!Wry
return queue[1]; W` V
} w,7 GC5j\
V{r@D!}
public void remove() { A{vG@Pwc:
SortUtil.swap(queue,1,size--); `,O^=HBM
fixDown(1); xM,3F jF
} +TX]~k79Oq
file://fixdown =&'j;j
private void fixDown(int k) { WUWQcJj
int j; KN=Orx7Gy
while ((j = k << 1) <= size) { }e$);A|
if (j < size %26amp;%26amp; queue[j] j++; V RL6F2 >6
if (queue[k]>queue[j]) file://不用交换 O<*iDd`(e
break; (;h\)B!o
SortUtil.swap(queue,j,k); K!X8KPo
k = j; o2L/8q.
} QX4I+x~oo\
} Tq+pFEgQ`@
private void fixUp(int k) { )mU)7@!
while (k > 1) { ?/~1z*XUW
int j = k >> 1; _)Ms9RN
if (queue[j]>queue[k]) D~Su822
break; |(fWT}tg
SortUtil.swap(queue,j,k); ]_h"2|
k = j; h4CB1K
} aw`mB,5U
} ]!QeJ'BLM
O-k(5Zb
} %rsW:nl
]pt @
} @`{UiTNX`
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SortUtil： 7iJlW&W
Kh>^;`h
package org.rut.util.algorithm; x;I*Ho
V}*b^<2o5
import org.rut.util.algorithm.support.BubbleSort; C`ok{SNtUy
import org.rut.util.algorithm.support.HeapSort; Hd:ZE::Q'#
import org.rut.util.algorithm.support.ImprovedMergeSort; "6ZatRUd
import org.rut.util.algorithm.support.ImprovedQuickSort; .d2s4q\
import org.rut.util.algorithm.support.InsertSort; cg4,PI%hz
import org.rut.util.algorithm.support.MergeSort; l\eq/yg_
import org.rut.util.algorithm.support.QuickSort; f%af.cR*
import org.rut.util.algorithm.support.SelectionSort; lL?;?V~
import org.rut.util.algorithm.support.ShellSort; vDemY"wz
S=o/n4@}
/** E5rNC/Ul$$
* @author treeroot O/-xkzR*
* @since 2006-2-2 Y#G '[N>
* @version 1.0 q7;)&_'
*/ ,70|I{,Km
public class SortUtil { q+z,{K
public final static int INSERT = 1; #Rs7Ieu+
public final static int BUBBLE = 2; OG.`\G|
public final static int SELECTION = 3; 6^p6v
public final static int SHELL = 4; +um; eL7
public final static int QUICK = 5; 82$^pg>
public final static int IMPROVED_QUICK = 6; *{ .u\BL5
public final static int MERGE = 7; J&5|'yVX
public final static int IMPROVED_MERGE = 8; "_^FRz#h
public final static int HEAP = 9; FKaY w
.{6TX"M
public static void sort(int[] data) { kys?%Y1
sort(data, IMPROVED_QUICK); MRs8l
} 5<u+2x8|
private static String[] name={ e}kG1C8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6>l-jTM
}; ),n?"
Yy&0b(m U
private static Sort[] impl=new Sort[]{ 2$jY_{B+x
new InsertSort(), ZnQnv@{8l
new BubbleSort(), <1"6`24
new SelectionSort(), dM QnN[d6
new ShellSort(), 4m~\S)ad
new QuickSort(), 9TeDLp
new ImprovedQuickSort(), 7Kn=[2J5k'
new MergeSort(), 6A%Y/oU+2
new ImprovedMergeSort(), '?QZ7A
new HeapSort() a+Q)~13
}; {#7t(:x
h7g9:10
public static String toString(int algorithm){ .AKx8=f
return name[algorithm-1]; k07O.9>
} S>6APQ-
xH92=t-w
public static void sort(int[] data, int algorithm) { @x)z" )>
impl[algorithm-1].sort(data); :`_wy-}V
} <)M?qkjb
ct/I85c@P
public static interface Sort { 7n#0eska,
public void sort(int[] data); R (6Jvub"I
} /GEqU^ B
Blu^\:?#z-
public static void swap(int[] data, int i, int j) { JAgec`T%
int temp = data; |u03~L9G
data = data[j]; _yU e2Gd
data[j] = temp; l9n8v\8,o
} &We'omq
} J?%Z7&/M>