[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; Z'm( M[2K
} D2io3Lo$ov
int i1=l; }/g1
int i2=mid+1; G {a;s-OA3
for(int cur=l;cur<=r;cur++){ Yi19VU|/
if(i1==mid+1) GB>T3l"
data[cur]=temp[i2++]; akwS;|SZ
else if(i2>r) "IWL& cH3
data[cur]=temp[i1++]; w"A>mEex<
else if(temp[i1] data[cur]=temp[i1++]; "c![s%
else $]?M[sL\N7
data[cur]=temp[i2++]; W=2]!%3#
} dQ#oY|a
} H{_6e6`e.
fvG4K(
} u:,B&}j
:%U lNk
改进后的归并排序: 0.1?hb|p5T
6*I=% H|
package org.rut.util.algorithm.support; q@Zeu\T,*#
nzU0=w}V
import org.rut.util.algorithm.SortUtil; 1W9uWkk_d
9FF
/** ^a#W|-:
* @author treeroot '2{60t_A
* @since 2006-2-2 ntZHO}'
* @version 1.0 j3>&Su>H4
*/ 8Z 0@-8vi
public class ImprovedMergeSort implements SortUtil.Sort { R]o2_r7N"}
q-e3;$
private static final int THRESHOLD = 10; CZ(fP86e
T\Jm=+]c!
/* Owh:(EJ"d
* (non-Javadoc) Tb] h<S
* \x"BgLSE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \JNWL yw
*/ K{FBrh
public void sort(int[] data) { VxU{ZD~<Z"
int[] temp=new int[data.length]; ,~NJ}4wP
mergeSort(data,temp,0,data.length-1); .;&4'ga4
} i^rHZmT
1\5po^Oioy
private void mergeSort(int[] data, int[] temp, int l, int r) { ZPHatC
int i, j, k; y"zZ9HQM
int mid = (l + r) / 2; E FBvi
if (l == r) ^YEMR C
return; <h`}I3Ao
if ((mid - l) >= THRESHOLD) =z}M(<G
mergeSort(data, temp, l, mid); T`Xz*\}Zb
else >~T2MlRux
insertSort(data, l, mid - l + 1); MnptC 1N
if ((r - mid) > THRESHOLD) ^K^rl9
mergeSort(data, temp, mid + 1, r); A.<M*[{q
else >a: 6umY
insertSort(data, mid + 1, r - mid); z~;@Mo"*f
+@\=v}: F
for (i = l; i <= mid; i++) { IY|>'}UU#
temp = data; 3[%n@i4H|
} .?r}3Ch
for (j = 1; j <= r - mid; j++) { N$cAX^~
temp[r - j + 1] = data[j + mid]; q)tNH/
} S#\Cyn2(t
int a = temp[l]; 59(} D'lw>
int b = temp[r]; >< Qp%yT
for (i = l, j = r, k = l; k <= r; k++) { IpVtbDW
if (a < b) { U@)WTH6d
data[k] = temp[i++]; 7#9fcfL
a = temp; j8ac8J,}c
} else { A&Cs (e
data[k] = temp[j--]; wd Di5-A4
b = temp[j]; tj tN<y
} &lB>G[t
} +)7h)uq
} F>5)Clq
<ceJ!"L
/** p%e/>N.P
* @param data a,[NcdG
* @param l {CGk9g"`
* @param i {JW_ZJx
*/ 9NqZ&S
private void insertSort(int[] data, int start, int len) { 4aG}ex-s|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w-``kID
} Oi~.z@@
} !Ee&e~"
} D*)"?LG
} 6,skF^
QQUZneIDp
堆排序： 2%j"E{J&
h ?+vH{}j
package org.rut.util.algorithm.support; BNbz{tbX"
2O0</^Z%E
import org.rut.util.algorithm.SortUtil; (vbI4&r
Dfd%Z;Yu
/** 4I;$a;R!
* @author treeroot u:\DqdlU`
* @since 2006-2-2 {uiL91j.
* @version 1.0 oF5~|&C
*/ M V~3~h8
public class HeapSort implements SortUtil.Sort{ [S[@ Q[zP@
VqdR
/* (non-Javadoc) +\MGlsMK@.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YHo*IX')C?
*/ 8' +I8J0l
public void sort(int[] data) { C0'_bTfB
MaxHeap h=new MaxHeap(); D;X/7 p|>
h.init(data); \xOv9(
for(int i=0;i h.remove(); aX35^K /
System.arraycopy(h.queue,1,data,0,data.length); 2;YL+v2
} vi0nJ -Xg
N`5 mPE
private static class MaxHeap{ _(:bGI'.m
x]|-2t
void init(int[] data){ Ba;tEF{X
this.queue=new int[data.length+1]; 2r#W#z%vS
for(int i=0;i queue[++size]=data; Us8nOr>5
fixUp(size); ?) VBkA5j
} l~GcD
} o1u?H4z
AM4 :xz
private int size=0; :Pi="
IsB=G-s
private int[] queue; Q E*`#r#e
i M!=/
public int get() { MH_3nN
return queue[1]; Bfr$&?j#
} g}*F"k4j
Z<$y)bf
public void remove() { ~*ll,<L:
SortUtil.swap(queue,1,size--); ]llvG\
fixDown(1); jftf]n&Z(q
} Z`kI6
file://fixdown }e&Z"H |
private void fixDown(int k) { gJuA*^
int j; EY[J;H_b
while ((j = k << 1) <= size) { q!}O+(kt
if (j < size %26amp;%26amp; queue[j] j++; 66Xo3o
if (queue[k]>queue[j]) file://不用交换 Ea?u5$>gY"
break; i^&^eg'.5
SortUtil.swap(queue,j,k); :<`po4/
k = j; ,c[f/sT\
} ^es/xt
} TllIs&MCe
private void fixUp(int k) { O\)rp!i
while (k > 1) { UWq[K&vQZ
int j = k >> 1; T&kr IZw
if (queue[j]>queue[k]) R]Pv=fn
break; M`.v/UQn
SortUtil.swap(queue,j,k); G^_fbrZjN
k = j; ;bes#|^F
} @ykM98K
} Y%)@)$sK
WhN~R[LE_
} Fs;_z9ej-u
0^&-j.9
} KJN{p~Q
e'1}5Ky
SortUtil： `'M}.q,k~
wx)Yl1C
package org.rut.util.algorithm; c*`=o(S
0?8{q{ o+
import org.rut.util.algorithm.support.BubbleSort; p>GxSE)
import org.rut.util.algorithm.support.HeapSort; =aE!y5
import org.rut.util.algorithm.support.ImprovedMergeSort; {/SLDyf%Z
import org.rut.util.algorithm.support.ImprovedQuickSort; ekhx?rz
import org.rut.util.algorithm.support.InsertSort; 5$L=l
import org.rut.util.algorithm.support.MergeSort; W&8)yog.
import org.rut.util.algorithm.support.QuickSort; cAc>p-y%
import org.rut.util.algorithm.support.SelectionSort; <46fk*
import org.rut.util.algorithm.support.ShellSort; V<G=pPC'H
U<mFwJ C]
/** x6B_5eF
* @author treeroot h[I~D`q)v
* @since 2006-2-2 *S=zJyAO
* @version 1.0 v6`TbIq%
*/ #&ZwQw
public class SortUtil { 2';f8JLY
public final static int INSERT = 1; 0'4V*Y
public final static int BUBBLE = 2; fI1,L"
public final static int SELECTION = 3; !_My]>S
public final static int SHELL = 4; ]-G10p}Ph-
public final static int QUICK = 5; !L_\6;aP,x
public final static int IMPROVED_QUICK = 6; %(y0,?*
public final static int MERGE = 7; q\a'pp9d
public final static int IMPROVED_MERGE = 8; _qQB.Dzo:
public final static int HEAP = 9; /4PV<[ :_
>@9>bI+Q
public static void sort(int[] data) { 86N"EuH$
sort(data, IMPROVED_QUICK); x7l3&;yDv
} yUzpl[*e^o
private static String[] name={ 1lLL9l{UVw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0413K_
}; MC&sM-/
;OynkZs)
private static Sort[] impl=new Sort[]{ Y]gb`z$?
new InsertSort(), sM$gfFx
new BubbleSort(), l2LUcI$ x
new SelectionSort(), aL%amL6CX
new ShellSort(), ?A7_&=J%
new QuickSort(), dwAFJhgh
new ImprovedQuickSort(), KM;'MlO
new MergeSort(), 7BDRA},o
new ImprovedMergeSort(), 7Ta",S@m
new HeapSort() 8rx"D`{|
}; WbW@V_rr
bhWH
public static String toString(int algorithm){ jk'.Gz
return name[algorithm-1]; :;(zA_-
} 251^>x.R
DYKJVn7w
public static void sort(int[] data, int algorithm) { 4#^?-6
impl[algorithm-1].sort(data); \E3evU
} !9knFt43
O>j_xW]V
public static interface Sort { kLw07&H
public void sort(int[] data); WfDpeXdO
} J` J^C
kt*""&R
public static void swap(int[] data, int i, int j) { 1IRlFC
int temp = data; aOH$}QnS
data = data[j]; Eu^?e
data[j] = temp; 5s'oVO*hW
} {q-<1|xj/J
} "Wz#<! .r