[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; '{OZ[$E
} vkBngsS
int i1=l; bcj7.rh]'h
int i2=mid+1; 9.%{M#j
for(int cur=l;cur<=r;cur++){ W"wP%
if(i1==mid+1) Keof{>V=CA
data[cur]=temp[i2++]; v5<Ext rV
else if(i2>r) t[an,3
data[cur]=temp[i1++]; ^$x^JM ]/
else if(temp[i1] data[cur]=temp[i1++]; "2=v?,'t
else i 3?zYaT
data[cur]=temp[i2++]; ;'vY^I8-L
} PeE'#&wn
} YtIJJH
<cepRjDn
} iY*Xm,#
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改进后的归并排序: @p`#y
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package org.rut.util.algorithm.support; 9B*SWWAj
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import org.rut.util.algorithm.SortUtil; =VY[m-q5
@~a52'\
/** ?<F\S2W
* @author treeroot g<.VW0
* @since 2006-2-2 |5![k<o#
* @version 1.0 [#2= w
*/ vx-u+/\
public class ImprovedMergeSort implements SortUtil.Sort { P5aHLNit
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private static final int THRESHOLD = 10; L:B&`,E
fNB*o={r|
/* 7i/?+|
* (non-Javadoc) (mza&WF7
* J-I7K!B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L'['7
*/ dmE-WS
public void sort(int[] data) { W:0@m^r
int[] temp=new int[data.length]; Txw,B2e)>
mergeSort(data,temp,0,data.length-1); Rmd;ug9
} GbNVcP.ocP
R8HA X
private void mergeSort(int[] data, int[] temp, int l, int r) { JQbI^ef_;
int i, j, k; B VPf8!-
int mid = (l + r) / 2; KQr=;O\T
if (l == r) ?rHc%H
return; pGsVO5M?
if ((mid - l) >= THRESHOLD) @rVmr{UE
mergeSort(data, temp, l, mid); $wX5`d1
else ^s24f?3
insertSort(data, l, mid - l + 1); Iem* 'r
if ((r - mid) > THRESHOLD) |t.WPp5,
mergeSort(data, temp, mid + 1, r); (>)Y0ki}
else fh,Y#.V`
insertSort(data, mid + 1, r - mid); ][_:{ N/
9$d (`-&9p
for (i = l; i <= mid; i++) { ?|8H$1
temp = data; EzthRe9
} GU"MuW`u2
for (j = 1; j <= r - mid; j++) { 'l<kY\I!%
temp[r - j + 1] = data[j + mid]; [x)BQX'
} *4.f*3*
int a = temp[l]; eH1Y!&`
int b = temp[r]; Y @K9Hl
for (i = l, j = r, k = l; k <= r; k++) { 0e/~H^,SQ
if (a < b) { rg\|-_.es'
data[k] = temp[i++]; }*0%wP
a = temp; (D~mmffY1
} else { rfCoi>{<
data[k] = temp[j--]; W6jB!W
b = temp[j]; !0zM@p
} 0jg-]
} A)VOv`U@2
} B"{CWH O
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/** a_Xh(d$
* @param data KXdls(ROP
* @param l 12k)Ek9
* @param i -pLb%f0?
*/ j&#p&`B
private void insertSort(int[] data, int start, int len) { 4V[+6EV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '9RHwKu&s
} K,^b=_]
} VT0I1KQx.
} tM!1oWH
} OO\UF6MCU
6%fU}si,
堆排序： 9^jO^[>
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package org.rut.util.algorithm.support; SUvHLOA
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import org.rut.util.algorithm.SortUtil; UkeW2l`:
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/** 8BWLi5R[
* @author treeroot Cu9,oU+N
* @since 2006-2-2 sg9ZYWcL
* @version 1.0 s[Njk@y,
*/ ^ *m;![$[
public class HeapSort implements SortUtil.Sort{ f)gA.Rz
sy]1Ba%
/* (non-Javadoc) KXR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hS<x+|'l
*/ 7$b78wax
public void sort(int[] data) { $r_z""eOc
MaxHeap h=new MaxHeap(); `cVG_=2
h.init(data); 2"%d!"
for(int i=0;i h.remove(); B\N,%vsx#U
System.arraycopy(h.queue,1,data,0,data.length); &;C|=8eB
} \N;s@j W
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private static class MaxHeap{ Q@l3XNH|c
^>]p4Q3 6
void init(int[] data){ bD49$N?>
this.queue=new int[data.length+1]; u6|7P<HUfb
for(int i=0;i queue[++size]=data; "esV#%:#J
fixUp(size); iUSs)[]H>
} f$/Daq <M
} <v0 d8
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private int size=0; 6IeHZ)jGj
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private int[] queue; 'm-s8]-W
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public int get() { LoNz 1KJL
return queue[1]; w'U;b
} %Wu3$b
Hh;7 hY\
public void remove() { CQ13fu+|6
SortUtil.swap(queue,1,size--); u,/PJg-(!
fixDown(1); Q%KS$nP9
} {AQ3y,sh
file://fixdown 1uS _]59=
private void fixDown(int k) { 4xg%OH
int j; _.\p^ HM
while ((j = k << 1) <= size) { `_z8DA}E
if (j < size %26amp;%26amp; queue[j] j++; Riu0;U( \
if (queue[k]>queue[j]) file://不用交换 <51(q_f
break; V=1Y&y
SortUtil.swap(queue,j,k); yPuT%H&i
k = j; {wCQ#V
} {fk'g(E8([
} 'N'EC`R
private void fixUp(int k) { \W#M]Q
while (k > 1) { MheP@ [w|@
int j = k >> 1; s{hJ"lv:
if (queue[j]>queue[k]) Z wIsEJz
break; 'rU5VrK
SortUtil.swap(queue,j,k); "EHwv2Hm>
k = j; oXb}6YC
} {6v+ Dz>
} "4i(5|whp?
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} _[IN9ZC2G
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} )I`B+c:
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SortUtil： @K2q*d
keCM}V`?"
package org.rut.util.algorithm; J`V7FlM
6fQQKM@a|
import org.rut.util.algorithm.support.BubbleSort; 7e>n{rl
import org.rut.util.algorithm.support.HeapSort; r!j_KiUy
import org.rut.util.algorithm.support.ImprovedMergeSort; E+F!u5u
import org.rut.util.algorithm.support.ImprovedQuickSort; * UBU?
import org.rut.util.algorithm.support.InsertSort; 6|["!AUI
import org.rut.util.algorithm.support.MergeSort; 0FHN
import org.rut.util.algorithm.support.QuickSort; .gx*gX1<
import org.rut.util.algorithm.support.SelectionSort; p\F*Y,4
import org.rut.util.algorithm.support.ShellSort; qKZ~)B j
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/** </Q<*@p?
* @author treeroot ,in`JM<o
* @since 2006-2-2 k q_B5L?
* @version 1.0 ,Cde5A{K
*/ [7Q|vu
public class SortUtil { <5?.S{Z9
public final static int INSERT = 1; F0]NtKaH
public final static int BUBBLE = 2; Y|>y]x
public final static int SELECTION = 3; :J}L| `U9
public final static int SHELL = 4; (4x`/
public final static int QUICK = 5; sDw&U?gUv
public final static int IMPROVED_QUICK = 6; /oE@F178
public final static int MERGE = 7; \_CC6J0k
public final static int IMPROVED_MERGE = 8; O~l WFaW
public final static int HEAP = 9; f*LDrAf9
qeHb0G
public static void sort(int[] data) { )>C,y`,
sort(data, IMPROVED_QUICK); Kcl>uAgU
} l]^uVOX
private static String[] name={ l<!?`V6}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A0 x*feK?
}; _}{C?611c
.$L'Jt2X
private static Sort[] impl=new Sort[]{ p.gi8%f`
new InsertSort(), D3|y|Dr
new BubbleSort(), @e3O=_m-
new SelectionSort(), {!Jw+LPv$$
new ShellSort(), L+(5`Y
new QuickSort(), Vw<=& w#K
new ImprovedQuickSort(), 9<G-uF
new MergeSort(), #1&wfI$
new ImprovedMergeSort(), Rs8^27
new HeapSort() H Y\-sl^
}; S:+SZq
DO8@/W( `
public static String toString(int algorithm){ QI.{M$,m~
return name[algorithm-1]; OpW4@le_r
} 9)];l?l
+MvcW.W~
public static void sort(int[] data, int algorithm) { Qis[j-?:
impl[algorithm-1].sort(data); u @?n3l
} oZQ%P
LlrUJ-uC7
public static interface Sort { *[9FPya
public void sort(int[] data); IlN9IF\9L
} 9l+'V0?`
4'RyD<K\
public static void swap(int[] data, int i, int j) { dpxP
int temp = data; !Z3iu
data = data[j]; DwMq
data[j] = temp; [daUtKz
} ")q
} jO&sS?